LTC6258/LTC6259/LTC6260
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For more information www.linear.com/LTC6258
APPLICATIONS
n Micropower Active Filters
n Portable Instrumentation
n Battery or Solar Powered Systems
n Automotive Electronics
n Gain Bandwidth Product: 1.3MHz
n Low Quiescent Current: 20µA
n C-Load™ Op Amp Drives all Capacitive Loads
n Offset Voltage: 400µV Maximum
n Rail-to-Rail Input and Output
n Supply Voltage Range: 1.8V to 5.25V
n EMI Rejection Ratio: 45dB at 1GHz
n Input Bias Current: 75nA Maximum
n CMRR/PSRR: 95dB/90dB
n Shutdown Current: 7µA Maximum
n Operating Temperature Range: –40°C to 125°C
n Single in 6-Lead TSOT-23, 2mm × 2mm DFN
Packages
n Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm
DFN Packages
n Quad in MS16 Package
TYPICAL APPLICATION
DESCRIPTION
1.3MHz, 20µA Power
Efficient Rail-to-Rail I/O
Op Amps
The LTC
®
6258/LTC6259/LTC6260 are single/dual/quad
operational amplifiers with low noise, low power, low
supply voltage, and rail-to-rail inputs and outputs. They
are unity gain stable with or without capacitive loads. They
feature 1.3MHz gain-bandwidth product, 0.24V/µs slew rate
while consuming only 20µA of supply current per amplifier
operating on supply voltages ranging from 1.8V to 5.25V.
The combination of low supply current, low supply volt-
age, high gain bandwidth product and low noise makes
the LTC6258 family unique among rail-to-rail input/output
op amps with similar supply current. These operational
amplifiers are ideal for power efficient applications.
For applications that require power-down, the LTC6258
in 2mm × 2mm DFN and LTC6259 MS10 packages
respectively offer shutdown which reduces the current
consumption to 7µA maximum.
The LTC6258 family can be used as plug-in replacements
for many commercially available op amps to reduce power
and improve input/output range and performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Over-The-Top and C-Load are trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
Low Noise Reference
FEATURES
Reference Buffer Noise Density
–
+
5V
V
+OUT
LTC6258
6258960 TA01
22µF
22µF
RIN1
2.7k
22µF
IN OUT
GND
LT6656
* 2.7K + 22µF FILTER
OP AMP, 44µF CLOAD
OP AMP
FILTERED REFERENCE
REFERENCE OUTPUT
INSTRUMENT ONLY
FREQUENCY (kHz)
0.1
1
10
100
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
NOISE DENSITY (nV/√Hz)
6258960 TA01a
LTC6258/LTC6259/LTC6260
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6258960fa
For more information www.linear.com/LTC6258
ABSOLUTE MAXIMUM RATINGS
Supply Voltage: V+ – V– ...........................................5.5V
Input Voltage ................................... V– – 0.2 to V+ + 0.2
Input Current: +IN, –IN, SHDN (Note 2) ............... ±10mA
Output Current: OUT ........................................... ±20mA
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4) .....–40°C to 125°C
(Note 1)
DC PACKAGE
6-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN
TOP VIEW
OUT
–IN
SHDN
V+
+IN
V–4
5
7
V–
6
3
2
1
TJMAX = 150°C, qJA = 80°C/W (NOTE 6)
EXPOSED PAD (PIN 7) IS V–, MUST BE SOLDERED TO PCB
TOP VIEW
OUTA
–INA
+INA
V–
V+
OUTB
–INB
+INB
DC PACKAGE
8-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN
9
V–
4
1
2
36
5
7
8
TJMAX = 150°C, qJA = 80°C/W (NOTE 6)
EXPOSED PAD (PIN 9) IS V–, MUST BE SOLDERED TO PCB
1
2
3
4
8
7
6
5
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
V+
OUTB
–INB
+INB
OUTA
–INA
+INA
V–
+
–
+
–
TJMAX = 150°C, qJA = 195°C/W (NOTE 6)
1
2
3
4
OUTA
–INA
+INA
V–
8
7
6
5
V+
OUTB
–INB
+INB
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
+
–
+
–
TJMAX = 150°C, qJA = 163°C/W (NOTE 6)
1
2
3
4
5
OUTA
–INA
+INA
V–
SHDNA
10
9
8
7
6
V+
OUTB
–INB
+INB
SHDNB
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
+
–
+
–
TJMAX = 150°C, qJA = 160°C/W (NOTE 6)
1
2
3
4
5
6
7
8
OUTA
–INA
+INA
V+
+INB
–INB
OUTB
NC
16
15
14
13
12
11
10
9
OUTD
–IND
+IND
V–
+INC
–INC
OUTC
NC
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
+
–
+
–
+
–
+
–
TJMAX = 150°C, qJA = 125°C/W (NOTE 6)
1
2
3
6
5
4
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
V+
SHDN
–IN
OUT
V–
+IN
+
–
TJMAX = 150°C, qJA = 192°C/W (NOTE 6)
PIN CONFIGURATION
Specified Temperature Range (Note 5)
LTC6258I/LTC6259I/LTC6260I ............–40°C to 85°C
LTC6258H/LTC6259H/LTC6260H ...... –40°C to 125°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TS8, MS8, MS only ...............................................300°C
LTC6258/LTC6259/LTC6260
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For more information www.linear.com/LTC6258
ORDER INFORMATION
5V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 5V, VCM = VOUT = VSUPPLY/2, CL = 10pF, VSHDN is unconnected.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V– + 0.3V
l
–400
–1000
100 400
1000
µV
µV
VCM = V+ – 0.3V
l
–400
–1000
100 400
1000
µV
µV
∆VOS/∆T Input Offset Voltage Drift VCM = V– + 0.3V, V+ – 0.3V 1.5 µV/°C
IBInput Bias Current (Note 7) VCM = V– + 0.3V l–75 –5 75 nA
VCM = V+ – 0.3V l–75 0 75 nA
IOS Input Offset Current VCM = V– + 0.3V l–75 –1 75 nA
VCM = V+ – 0.3V l–75 –1 75 nA
enInput Voltage Noise Density f = 1kHz 38 nV/√Hz
Input Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P
inInput Current Noise Density f = 1kHz, VCM = 0V to 4V
f = 1kHz, VCM = 4V to 5V
500
500
fA/√Hz
fA/√Hz
RIN Input Resistance Differential
Common Mode 1
10 MΩ
MΩ
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION
SPECIFIED
TEMPERATURE RANGE
LTC6258IS6#TRMPBF LTC6258IS6#TRPBF LTGWD 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC6258HS6#TRMPBF LTC6258HS6#TRPBF LTGWD 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC6258IDC#TRMPBF LTC6258IDC#TRPBF LGZS 6-Lead Plastic DFN (2mm × 2mm × 0.8mm) –40°C to 85°C
LTC6258HDC#TRMPBF LTC6258HDC#TRPBF LGZS 6-Lead Plastic DFN (2mm × 2mm × 0.8mm) –40°C to 125°C
LTC6259ITS8#TRMPBF LTC6259ITS8#TRPBF LTGWX 8-Lead Plastic TSOT-23 –40°C to 85°C
LTC6259HTS8#TRMPBF LTC6259HTS8#TRPBF LTGWX 8-Lead Plastic TSOT-23 –40°C to 125°C
LTC6259IDC#TRMPBF LTC6259IDC#TRPBF LGWT 8-Lead (2mm × 2mm × 0.8mm) Plastic DFN –40°C to 85°C
LTC6259HDC#TRMPBF LTC6259HDC#TRPBF LGWT 8-Lead (2mm × 2mm × 0.8mm) Plastic DFN –40°C to 125°C
TUBE
LTC6259IMS8#PBF LTC6259IMS8#TRPBF LTGWW 8-Lead Plastic MSOP –40°C to 85°C
LTC6259HMS8#PBF LTC6259HMS8#TRPBF LTGWW 8-Lead Plastic MSOP –40°C to 125°C
LTC6259IMS#PBF LTC6259IMS8#TRPBF LTGWY 10-Lead Plastic MSOP –40°C to 85°C
LTC6259HMS#PBF LTC6259HMS8#TRPBF LTGWY 10-Lead Plastic MSOP –40°C to 125°C
LTC6260IMS#PBF LTC6260IMS#TRPBF 6260 16-Lead Plastic MSOP –40°C to 85°C
LTC6260HMS#PBF LTC6260HMS#TRPBF 6260 16-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Parts ending with PBF are RoHS and WEEE Compliant.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/.
http://www.linear.com/product/LTC6258#orderinfo
LTC6258/LTC6259/LTC6260
4
6258960fa
For more information www.linear.com/LTC6258
5V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 5V, VCM = VOUT = VSUPPLY/2, CL = 10pF, VSHDN is unconnected.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
CIN Input Capacitance Differential
Common Mode 0.65
1.2 pF
pF
CMRR Common Mode Rejection Ratio VCM = 0.3V to 3.5V
VCM = –0.1V to 5.1V
l
l
66
64 95
95 dB
dB
IVR Input Voltage Range l–0.1 5.1 V
PSRR Power Supply Rejection Ratio VCM = 0.4V, VS = 1.8V to 5.25V
l
78
68 90 dB
dB
Supply Voltage Range l1.8 5.25 V
AVLarge Signal Gain VOUT = 0.5V to 4.5V, RLOAD = 100k
l
14
2.8 40 V/mV
V/mV
VOUT = 0.5V to 4.5V, RLOAD = 10k
l
3.5
0.5 10 V/mV
V/mV
VOL Output Swing Low (Input Overdrive 30mV).
Measured from V–No Load
l
12 40
50 mV
mV
ISINK = 100µA
l
80 105
120 mV
mV
ISINK = 1mA
l
145 180
250 mV
mV
VOH Output Swing High (Input Overdrive 30mV).
Measured from V+No Load
l
25 40
65 mV
mV
ISOURCE = 100µA
l
35 55
100 mV
mV
ISOURCE = 1mA
l
100 140
350 mV
mV
ISC Output Short-Circuit Current
l
4
110 mA
mA
ISSupply Current per Amplifier
l
16
11 20 23
25 µA
µA
Supply Current in Shutdown
l
4 5
7µA
µA
ISHDN Shutdown Pin Current VSHDN = 0.6V
VSHDN = 1.5V
l
l
60
0200
15 nA
nA
VIL SHDN Input Low Voltage Disable l0.6 V
VIH SHDN Input High Voltage Enable l1.5 V
tON Turn-On Time SHDN Toggle from 0V to 5V 152 µs
tOFF Turn-Off Time SHDN Toggle from 5V to 0V 7 µs
GBW Gain-Bandwidth Product f = 10kHz
l
1.0
0.4 1.3 MHz
MHz
tSSettling Time, 0.5V to 4.5V, Unity Gain 0.1%
0.01% 14
18 µs
µs
SR Slew Rate AV = –1, VOUT = 0.5V to 4.5V, CLOAD = 10pF,
RF = RG = 10kΩ
l
0.2
0.1 0.24 V/µs
V/µs
FPBW Full Power Bandwidth (Note 8) 4VP-P 20 kHz
THD+N Total Harmonic Distortion and Noise f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V
VIN = 2.25V to 2.75V 0.025
72 %
dB
ILEAK Output Leakage Current in Shutdown VSHDN = 0V, VOUT = 0V
VSHDN = 0V, VOUT = 5V
l
l
100
100 nA
nA
%MP Large Signal Overshoot VIN = 0.5V to 4.5V, AV = 1, CL = 100nF 2.7 %
EMIRR Electromagnetic Interference Rejection Ratio Input Power –10dB to Input Pins at 1GHz 45 dB
LTC6258/LTC6259/LTC6260
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For more information www.linear.com/LTC6258
1.8V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 1.8V, VCM = VOUT = 0.4V, CL = 10pF, VSHDN is
unconnected.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V– + 0.3V
l
–400
–1000
100 400
1000
µV
µV
VCM = V+ – 0.3V
l
–400
–1000
100 400
1000
µV
µV
∆VOS/∆T Input Offset Voltage Drift VCM = V– + 0.3V, V+ – 0.3V 1.5 µV/°C
IBInput Bias Current (Note 7) VCM = V– + 0.3V l–75 2 75 nA
VCM = V+ – 0.3V l–75 5 75 nA
IOS Input Offset Current VCM = V– + 0.3V l–75 2 75 nA
VCM = V+ – 0.3V l–75 2 75 nA
enInput Voltage Noise Density f = 1kHz, VCM = 0.4V 38 nV/√Hz
Input Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P
inInput Current Noise Density f = 1kHz, VCM = 0V to 0.8V
f = 1kHz, VCM = 1V to 1.8V
500
500
fA/√Hz
fA/√Hz
RIN Input Resistance Differential
Common Mode
1
10
MΩ
MΩ
CIN Input Capacitance Differential
Common Mode
0.65
1.2
pF
pF
CMRR Common Mode Rejection Ratio VCM = 0.2V to 1.6V
l
70
61
90 dB
dB
IVR Input Voltage Range l–0.1 1.9 V
PSRR Power Supply Rejection Ratio VCM = 0.4V, VS = 1.8V to 5.25V
l
78
68
90 dB
dB
AVLarge Signal Gain VOUT = 0.5V to 1.3V, RLOAD = 100k
l
15
1.6
50 V/mV
V/mV
VOUT = 0.5V to 1.3V, RLOAD = 10k
l
4
0.4
10 V/mV
V/mV
VOL Output Swing Low (Input Overdrive 30mV),
Measured from V–No Load
l
15 30
50
mV
mV
ISINK = 100µA
l
80 110
130
mV
mV
ISINK = 1mA
l
150 200
230
mV
mV
LTC6258/LTC6259/LTC6260
6
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For more information www.linear.com/LTC6258
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The inputs are protected by back-to-back diodes as well as ESD
protection diodes to each power supply. If the differential input voltage
exceeds 1.4V or the input extends more than 500mV beyond the power
supply, the input current should be limited to less than 10mA.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 4: LTC6258I/LTC6259I/LTC6260I and LTC6258H/LTC6259H/
LTC6260H are guaranteed functional over the temperature range of
–40°C to 125°C.
1.8V ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VSUPPLY = 1.8V, VCM = VOUT = 0.4V, CL = 10pF, VSHDN is
unconnected.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOH Output Swing High (Input Overdrive 30mV),
Measured from V+No Load
l
25 40
50
mV
mV
ISOURCE = 100µA
l
35 60
100
mV
mV
ISOURCE = 1mA
l
95 140
300
mV
mV
ISC Output Short-Circuit Current
l
4
1
10 mA
mA
ISSupply Current per Amplifier
l
17
10
20 21
23
µA
µA
Supply Current in Shutdown
l
1.0 1.5
2
µA
µA
ISHDN Shutdown Pin Current VSHDN = 0.5V
VSHDN = 1.5V
l
l
50
0
80
10
nA
nA
VIL SHDN Input Low Voltage Disable l0.5 V
VIH SHDN Input High Voltage Enable l1.5 V
tON Turn-On Time SHDN Toggle From 0V to 1.8V 47 µs
tOFF Turn-Off Time SHDN Toggle From 1.8V to 0V 17 µs
GBW Gain-Bandwidth Product f = 10kHz
l
1.0
0.4
1.3 MHz
MHz
TSSettling Time, 0.3V to 1.5V, Unity Gain 0.1%
0.01%
7
12
µs
µs
SR Slew Rate AV = –1, VOUT = 0.3V to 1.5V, CLOAD = 10pF
RF = RG = 10kΩ
l
0.16
0.1
0.22 V/µs
V/µs
FPBW Full Power Bandwidth (Note 8) 1.2VP-P 58 kHz
THD+N Total Harmonic Distortion and Noise f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V
VIN = 0.65V to 0.15V
0.04
68
%
dB
Note 5: The LTC6258I/LTC6259I/LTC6260I are guaranteed to meet
specified performance from –40°C to 85°C. The LTC6258H/LTC6259H/
LTC6260H are guaranteed to meet specified performance from –40°C to
125°C.
Note 6: Thermal resistance varies with the amount of PC board metal
connected to the package. The specified values are for short traces
connected to the leads.
Note 7: The input bias current is the average of the currents into the
positive and negative input pins.
Note 8: Full power bandwidth is calculated from the slew rate FPBW =
SR/π • VP-P.
LTC6258/LTC6259/LTC6260
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For more information www.linear.com/LTC6258
TYPICAL PERFORMANCE CHARACTERISTICS
Input Offset Drift Distribution VOS vs Supply Voltage (25°C)
VOS vs Common Mode
Voltage
VOS vs IOUT
Input Bias Current vs Common
Mode Voltage
Input Bias Current vs Common
Mode Voltage
Input VOS Histogram Input VOS Histogram VOS vs Temperature
V
S
= ±2.5V
V
CM
= 0V
V
OS
(µV)
–350
–250
–150
–50
50
150
250
350
0
10
20
30
40
50
60
70
80
90
100
NUMBER OF PARTS
6258 G01
V
S
= ±2.5V
V
CM
= 2.2V
V
OS
(µV)
–350
–250
–150
–50
50
150
250
350
0
10
20
30
40
50
60
70
80
90
100
NUMBER OF PARTS
6258 G02
V
S
= ±2.5V
V
CM
= 0V
TEMPERATURE (°C)
–40
–25
–10
5
20
35
50
65
80
95
110
125
–500
–400
–300
–200
–100
0
100
200
300
400
500
V
OS
(µV)
6258 G03
V
S
= ±2.5V
V
CM
=0V
HGRADE
IND
DISTRIBUTION (µV/°C)
–5
–4
–3
–2
–1
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
9
10
11
NUMBER OF UNITS
6258 G04
V
CM
= 0.4V
SUPPLY VOLTAGE (V)
1.8
2.4
3.0
3.6
4.2
4.8
5.4
–200
–160
–120
–80
–40
0
40
80
120
160
200
V
OS
(µV)
6258 G05
V
S
= 5V
V
CM
(V)
0.5
1.5
2.5
3.5
4.5
5.5
–500
–400
–300
–200
–100
0
100
200
300
400
500
V
OS
(µV)
6258 G06
V
S
= ±2.5V
V
CM
= 0V
–40°C
25°C
125°C
I
OUT
(mA)
–5
–4
–3
–2
–1
0
1
2
3
4
5
–1
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
VOS (mV)
6258 G07
V
S
= 5V
+IN
–IN
V
CM
(V)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
–20
–16
–12
–8
–4
0
4
8
12
16
20
INPUT BIAS CURRENT (nA)
6258 G08
V
S
= 1.8V
+IN
–IN
V
CM
(V)
0
0.3
0.6
0.9
1.2
1.5
1.8
–20
–16
–12
–8
–4
0
4
8
12
16
20
INPUT BIAS CURRENT (nA)
6258 G09
LTC6258/LTC6259/LTC6260
8
6258960fa
For more information www.linear.com/LTC6258
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current
vs Temperature Per Channel
Output Saturation Voltage
vs Load Current
Output Saturation Voltage
vs Load Current
Output Short-Circuit Current
vs Supply Voltage (Sourcing)
Output Short-Circuit Current
vs Supply Voltage (Sinking)
0.1Hz to 10Hz Output
Voltage Noise
Input Bias Current
vs Supply Voltage Input Bias Current vs Temperature
Supply Current vs Supply Voltage
per Channel
V
CM
= 0.4V
+IB (nA)
–IB (nA)
SUPPLY VOLTAGE (V)
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
–10
–8
–6
–4
–2
0
2
4
6
8
10
INPUT BIAS CURRENT (nA)
6258 G10
V
S
= ±2.5V
+IB, V
CM
= 2V
–IB, V
CM
= 2V
+IB, V
CM
= –2V
–IB, V
CM
= –2V
TEMPERATURE (°C)
–40
–25
–10
5
20
35
50
65
80
95
110
125
–20
–15
–10
–5
0
5
10
15
20
INPUT BIAS CURRENT (nA)
6262 G11
V
S
= 5V
V
CM
= 0.4V
25°C
–40°C
125°C
SUPPLY VOLTAGE (V)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
2
4
6
8
10
12
14
16
18
20
SUPPLY CURRENT (uA)
6258 G12
V
CM
= 0.4V
VS = 5V
VS = 1.8V
TEMPERATURE (°C)
–50
–20
10
40
70
100
130
0
5
10
15
20
25
SUPPLY CURRENT (µA)
6258 G13
–40°C/5V
25°C/5V
85°C/5V
125°C/5V
–40°C/1.8V
25°C/1.8V
85°C/1.8V
125°C/1.8V
LOAD CURRENT (mA)
0
0.5
1
1.5
2
–350
–300
–250
–200
–150
–100
–50
0
SATURATION VOLTAGE FROM TOP RAIL (mV)
6258 G14
–40°C/5V
25°C/5V
85°C/5V
125°C/5V
–40°C/1.8V
25°C/1.8V
85°C/1.8V
125°C/1.8V
LOAD CURRENT (mA)
0
0.5
1
1.5
2
0
50
100
150
200
250
300
350
SATURATION VOLTAGE FROM BOTTOM RAIL (mV)
6258 G15
V
CM
= 0.4V
25°C
125°C
–40°C
SUPPLY VOLTAGE (V)
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
0
5
10
15
20
25
MAXIMUM SOURCING CURRENT (mA)
6258 G16
V
CM
= 0.4V
SUPPLY VOLTAGE (V)
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
0
5
10
15
20
25
30
MAXIMUM SINKING CURRENT (mA)
6259 G17
25°C
125°C
–40°C
V
S
= ±2.5V
V
CM
= 0.4V
A
V
= 1
TIME (s)
0
1
2
3
4
5
6
7
8
9
10
–5
–4
–3
–2
–1
0
1
2
3
4
5
NOISE VOLTAGE (µV)
6258 G18
LTC6258/LTC6259/LTC6260
6258960fa
9
For more information www.linear.com/LTC6258
TYPICAL PERFORMANCE CHARACTERISTICS
Total Harmonic Distortion
and Noise
Total Harmonic Distortion
and Noise
Gain and Phase vs Frequency
Noise Voltage Density
vs Frequency
Input Referred Current Noise
vs Frequency
Slew Rate vs Supply Voltage
Common Mode Rejection Ratio
vs Frequency
Power Supply Rejection Ratio
vs Frequency
V
S
= ±2.5V
V
CM
= 0V
FREQUENCY (Hz)
1
10
100
1k
10k
100k
1M
0
50
100
150
200
250
300
350
400
450
500
INPUT REFERRED VOLTAGE NOISE (nV/√Hz)
6258 G19
V
S
= 2.5V
V
CM
= 0V
FREQUENCY (MHz)
0.1
1
0.1
1
10
INPUT REFERRED CURRENT NOISE (pA/√Hz)
6258 G20
V
S
= ±0.9V
V
CM
= 0V
A
V
= 2
RG = RF = 10kΩ
1kHz
500Hz
V
OUTP–P
(V)
0.1
1
0.1
1
THD+N (%)
6259 G21
V
S
= ±2.5V
V
CM
= 0V
A
V
= 2
RG = RF = 10kΩ
1kHz
500Hz
V
OUTP-P
(V)
0.01
0.1
1
10
0.01
0.1
1
THD+N (%)
6258 G23
VS = ±2.5V
V
CM
= 0V
GAIN
PHASE
FREQUENCY (Hz)
10k
100k
1M
10M
–50
–40
–30
–20
–10
0
10
20
30
40
50
0
9
18
27
36
45
54
63
72
81
90
GAIN (dB)
PHASE
6258 G23
V
STEP
= V
S
– 1V
A
V
= –1
R
G
=R
F
= 10kΩ
RISING
FALLING
SUPPLY VOLTAGE (V)
1.8
2.6
3.4
4.2
5
0
0.1
0.2
0.3
0.4
0.5
SLEW RATE (V/µs)
6258 G24
VS = 5V
VCM = ±2.5V
V
CM
= 0V
FREQUENCY (Hz)
1k
10k
100k
1M
10M
0
10
20
30
40
50
60
70
80
90
100
CMRR (dB)
6258 G25
V
S
= 5V
V
CM
= 0.4V
FREQUENCY (Hz)
100
1k
10k
100k
1M
10M
0
10
20
30
40
50
60
70
80
90
100
PSRR (dB)
6258 G26
V
S
= ±2.5V
V
CM
= 0V
A
V
= 1
V
IN
= ±2V
CAPACITIVE LOAD (nF)
0.1
1
10
100
0
1
2
3
4
5
OVERSHOOT (%)
6258 G27
Capacitive Load Handling
Overshoot vs Capacitive Load
LTC6258/LTC6259/LTC6260
10
6258960fa
For more information www.linear.com/LTC6258
TYPICAL PERFORMANCE CHARACTERISTICS
Small-Signal Response
Small-Signal Response
Electromagnetic Interference
Rejection Ratio
Large-Signal Response
Supply Current vs SHDN Pin
Voltage
Supply Current vs SHDN Pin
Voltage
Large-Signal Response
Output Impedance vs Frequency
V
S
= ±2.5V
A
V
= 1
R
LOAD
= 100kΩ
10pF
100pF
1nF
10nF
100nF
TIME (µs)
0
200
400
600
800
1000
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2.5
VOLTAGE (V)
6258 G28
V
S
= ±2.5V
A
V
= 1
R
LOAD
= 100kΩ
CLOAD = 10pF
CLOAD = 100pF
CLOAD = 1nF
CLOAD = 10nF
CLOAD = 100nF
TIME (µs)
0
200
400
600
800
1000
–50
–40
–30
–20
–10
0
10
20
30
40
50
VOLTAGE (mV)
6259 G30
V
S
= ±0.9V
A
V
= 1
R
LOAD
= 100kΩ
CLOAD = 10pF
CLOAD = 100pF
CLOAD = 1nF
CLOAD = 10nF
CLOAD = 100nF
TIME (µs)
0
200
400
600
800
1000
0.0
0.2
0.4
0.6
0.8
1.0
VOLTAGE (V)
6258 G30
V
S
= ±0.9V
A
V
= 1
R
LOAD
= 100kΩ
CLOAD = 10pF
CLOAD = 100pF
CLOAD = 1nF
CLOAD = 10nF
CLOAD = 100nF
TIME (µs)
0
200
400
600
800
1000
–50
–40
–30
–20
–10
0
10
20
30
40
50
VOLTAGE (mV)
6258 G31
V
S
= ±2.5V
V
CM
= 0V
AV = 10
AV = 1
FREQUENCY (kHz)
0.1
1
10
0.1
1
10
100
1k
10k
OUTPUT IMPEDANCE (Ω)
6258 G32
V
S
= 5V
V
CM
= 0.4V
TA = 125°C
TA = 25°C
TA = –40°C
V
SHDN
(V)
0
0.4
0.8
1.2
1.6
2
0
5
10
15
20
25
SUPPLY CURRENT (µA)
6258 G33
V
S
= 1.8V
V
CM
= 0.4V
TA = 125°C
TA = 25°C
TA = –40°C
V
SHDN
(V)
0
0.4
0.8
1.2
1.6
2
0
5
10
15
20
25
SUPPLY CURRENT (µA)
6258 G34
V
S
= 2.5V
V
CM
= 0V
INPUT POWER = –10dBm
+IN
–IN
FREQUENCY (MHz)
10
1000
10000
0
10
20
30
40
50
60
70
80
90
100
EMI REJECTION RATIO (dB)
6258 G35
LTC6258/LTC6259/LTC6260
6258960fa
11
For more information www.linear.com/LTC6258
PIN FUNCTIONS
–IN: Inverting Input of the Amplifier. Voltage range of this
pin can go from V– – 0.1V to V+ + 0.1V.
+IN: Noninverting Input of Amplifier. This pin has the same
voltage range as –IN.
V+: Positive Power Supply. Typically the voltage is from
1.8V to 5.25V. Split supplies are possible as long as the
voltage between V+ and V– is between 1.8V and 5.25V. A
bypass capacitor of 0.1µF as close to the part as possible
should be used between power supply pins or between
supply pins and ground.
V–: Negative Power Supply. It is normally tied to ground.
It can also be tied to a voltage other than ground as long
as the voltage between V+ and V– is from 1.8V to 5.25V.
If it is not connected to ground, bypass it with a capacitor
of 0.1µF as close to the part as possible.
SHDN: Active Low Shutdown. Shutdown threshold is 0.6V
above negative rail. If left unconnected, the amplifier will
be on.
OUT: Amplifier Output. Rail-to rail amplifier output capable
of delivering 4mA.
LTC6258/LTC6259/LTC6260
12
6258960fa
For more information www.linear.com/LTC6258
SIMPLIFIED SCHEMATIC
Figure 1. LTC6258/LTC6259/LTC6260 Simplified Schematic
+I2
Q17 Q18
ESDD4
–IN
+IN
V–
Q3Q4
Q6
Q8
R2
R4
Q9
Q12
R1
R3
R6
Q7
Q16
ESDD3
V+
ESDD1
V+
ESDD2
V–
V–
V
+
SHDN
V–
D8
D7
ESDD5
ESDD6
D6
D5
Q2
Q5 VBIAS
Q1
+I1
I3
Q19
R5
Q11
Q10
Q13
Q15
OUT
C2
C1
+
Q14
CC
BUFFER AND
OUTPUT BIAS
6258960 F01
LOGIC
LTC6258/LTC6259/LTC6260
6258960fa
13
For more information www.linear.com/LTC6258
OPERATION
The LTC6258 family input signal range extends beyond the
negative and positive power supplies. Figure 1 depicts a
Simplified Schematic of the amplifier. The input stage is
comprised of two differential amplifiers, a PNP stage Q1/
Q2 and NPN stage Q3/Q4 that are active over different
ranges of common mode input voltage. The PNP stage
is active between the negative power supply to approxi-
mately 1V below the positive supply. As the input voltage
approaches the positive supply, transistor Q5 will steer the
tail current I1 to the current mirror Q6/Q7, activating the
NPN differential pair and the PNP pair becomes inactive
for the remaining input common mode range. Also for the
input stage, devices Q17, Q18 and Q19 act to cancel the
bias current of the PNP input pair. When Q1/Q2 is active,
the current in Q16 is controlled to be the same as the
current Q1/Q2. Thus, the base current of Q16 is normally
equal to the base current of the input devices of Q1/Q2.
Similar circuitry (not shown) is used to cancel the base
current of Q3/Q4. The buffer and output bias stage uses
a special compensation technique to take full advantage
of the process technology to drive high capacitive loads.
The common emitter topology of Q14/Q15 enables the
output to swing from rail to rail.
LTC6258/LTC6259/LTC6260
14
6258960fa
For more information www.linear.com/LTC6258
APPLICATIONS INFORMATION
Low Supply Voltage and Low Power Consumption
The LTC6258 family of operational amplifiers can oper-
ate with power supply voltages from 1.8V to 5.25V. Each
amplifier draws 20µA. The low supply voltage capability
and low supply current are ideal for portable applications.
High Capacitive Load Driving Capability and Wide
Bandwidth
The LTC6258 family is optimized for wide bandwidth low
power applications. They have a high gain-bandwidth
to power ratio and are unity gain stable. When the load
capacitance increases, the increased capacitance at the
output pushes the non-dominant pole to lower frequency
in the open loop frequency response, worsening the phase
and gain margin. The LTC6258 family are designed to
directly drive up to 100nF of capacitive load in unity gain
configuration (see Typical Performance Characteristics,
Capacitive Load Handling).
Low Input Referred Noise
The LTC6258 family provides a low input referred noise of
38nV/√Hz at 1kHz. The average noise voltage density over
a 100kHz bandwidth is less than 80nV/√Hz. The LTC6258
family is ideal for low noise and low power signal process-
ing applications.
Low Input Offset Voltage
The LTC6258 family has a low offset voltage of 400μV,
which is essential for precision applications. The offset
voltage is trimmed with a proprietary trim algorithm to
ensure low offset voltage over the entire common mode
voltage range.
Low Input Bias Current
The LTC6258 family uses a bias current cancellation circuit
to compensate for the base current of the input transistors.
When the input common mode voltage is within 200mV of
either rail, the bias cancellation circuit is no longer active.
For common mode voltages ranging from 0.2V above the
negative supply to 0.2V below the positive supply, the
low input bias current allows the amplifiers to be used in
applications with high resistance sources.
Ground Sensing and Rail to Rail Output
The LTC6258 family delivers over 4mA of output drive
current. The output stage is a rail-to-rail topology that
is capable of swinging to within 300mV of either rail. If
output swing to the negative rail is required, an external
pull down resistor to a negative supply can be added.
For 5V/0V op amp supplies, a pull down resistor of 10k
to –2V will allow a ‘true zero’ output swing. In this case,
the output can swing all the way to the bottom rail while
maintaining 45dB of open loop gain. Since the inputs
can go 100mV beyond either rail, the op amp can easily
perform ‘true ground’ sensing.
The maximum output current is a function of total supply
voltage. As the supply voltage to the amplifier increases,
the maximum output current also increases. Attention must
be paid to keep the junction temperature of the IC below
150°C when the output is in continuous short-circuit. The
output of the amplifier has reverse-biased diodes con-
nected to each supply. The output should not be forced
more than 0.5V beyond either supply, otherwise current
will flow through these diodes.
EMI Rejection
Electromagnetic interference (EMI) rejection is built into
the LTC6258 op amp family. Rejection is measured by
injecting 200mVP-P (–10dBm) RF signal into the pins and
measuring the offset change (delta_VOS). The rejection
ratio is calculated as 20log (100mV/delta_VOS).
Input Protection and Output Overdrive
To prevent breakdown of the input transistors, the input
stages are protected against a large differential input
voltage by two pairs of back-to-back diodes, D5 to D8. If
the differential input voltage exceeds 1.4V, the current in
these diodes must be limited to less than 10mA. These
amplifiers are not intended for open loop applications such
as comparators. When the output stage is overdriven,
internal limiting circuitry is activated to improve overdrive
recovery. In some applications, this circuitry may draw as
much as 1mA supply current.
LTC6258/LTC6259/LTC6260
6258960fa
15
For more information www.linear.com/LTC6258
ESD
The LTC6258 family has reverse-biased ESD protection
diodes on all inputs and output as shown in Figure 1.
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current
glitch in the internal ESD protection circuits. Depending on
the supply inductance, this could result in a supply volt-
age transient that exceeds the maximum rating. A supply
voltage ramp time of greater than 1ms is recommended.
Feedback Components
Care must be taken to ensure that the pole formed by the
feedback resistors and the parasitic capacitance at the
inverting input does not degrade stability. For example, in
a gain of +2 configuration with gain and feedback resis-
tors of 100k, a poorly designed circuit board layout with
parasitic capacitance of 5pF (part +PC board) at the ampli-
fier’s inverting input will cause the amplifier to oscillate
due to a pole formed at 640kHz. An additional capacitor of
4.7pF across the feedback resistor as shown in Figure 2
will eliminate any ringing or oscillation.
Shutdown
The single and dual versions have package options with
SHDN pins that can shut down the amplifier to less than
7µA supply current. The SHDN pin voltage needs to be
within 0.6V of V– for the amplifier to shut down. During
shutdown, the output is in a high output impedance state.
When left floating, the SHDN pin is internally pulled up
to the positive supply and the amplifier remains enabled.
100k
100k
4.7pF
CPAR V
OUT
VIN 6258960 F02
+
–
LTC6258
Figure 2.
Figure 3a. 10kHz Bandpass Filter
Figure 3b. Frequency Response of
10kHz Bandpass Filter of Figure 3a
APPLICATIONS INFORMATION
V+
V+
C1
4.7nF
C2
4.7nF
R2
21k
C3
4.7nF
R3
562Ω
RA1
499k
6258 F03a
RA2
499k
CD1
1µF
R1
10k
R8
10k
IN OUT
CD2
0.1µF
U1
LT6259
–
+
5dB/DIV
5dB
–45dB
6258 F03b
Active Filter
The bandpass filter Figure 3a is AC-coupled to an input.
As a result, LTC6259 input does not place a burden on
the previous stage to develop an absolute common mode
voltage. A simple resistor divider with RA1 and RA2
provides biasing for the LTC6259 inputs. Pegging the op
amp inputs to a fixed voltage helps to reduce distortion
that might arise with moving common mode. This filter is
centered at 10kHz. The exact resistance and capacitance
values can be tweaked upwards or downwards, depending
on whether lowest resistor noise or lowest total supply
current is more important.
LTC6258/LTC6259/LTC6260
16
6258960fa
For more information www.linear.com/LTC6258
Figure 4b. Low Power Sine Generator
Figure 4c. FFT
Figure 4a. Low Power Squarewave - Sinewave Oscillator
APPLICATIONS INFORMATION
Low Power Sine Wave Generator
A low power sine wave generator can be derived by driving a
square wave into the bandpass filter. A complete schematic
is shown in Figure 4a. The LTC6992-1 easily configures
as a 50% duty cycle 10kHz square wave, and can drive
the relatively benign loading seen in the bandpass filter.
Figures 4b and 4c show the LTC6992-1 output and bandpass
filter output. THD of the sine wave is –30.5 dBc. Note, even
harmonics that appear in the distortion products of the
filtered output already appear in the source square wave.
Low Noise Reference
The LT6656 is a 1µA precision series voltage reference.
Yet with low power comes low drive current capability
and higher noise. The LTC6259 can be used as a buf-
fer that follows a filter to enhance the utilization of the
LT6656 in low power applications. Figure 5a shows such
a configuration. First a very low cutoff frequency follows
the LT6656 output (RIN1 and CIN1, lower than 5Hz cutoff).
Choice of filter resistor RIN1 is such that the bias current in
the LTC6259, multiplied by the resistance value, is lower
than the nominal offset voltage of the op amp. CIN1 can
be larger or smaller, with more or less filtering accord-
ingly. The voltage withstanding requirement of CIN1 is low,
resulting in large capacitance in a small volume.
V+
V+
4.7nF
4.7nF
21k
4.7nF
154k 182k
976k 0.1µF
154k
562Ω
499k
6258 F04a
499k1µF
10k 10k
MOD
LTC6992-1
GND
SET
OUT
V+
DIV
OUT
0.1µF
LT6258
–
+
V+
50µs/Div
0
1.0
2.0
3.0
4.0
5.0
LTC6992–1 OUTPUT (V)
6258 F04b
FILTERED OUTPUT
SQUARE WAVE
FREQUENCY (kHz)
0
10
20
30
40
50
60
70
80
90
100
–120
–100
–80
–60
–40
–20
0
20
AMPLITUDE (dB)
6258 F04c
LTC6258/LTC6259/LTC6260
6258960fa
17
For more information www.linear.com/LTC6258
APPLICATIONS INFORMATION
–
+
5V
V+OUT
LTC6258
6258960 F05a
22µF
22µF
RIN1
2.7k
22µF
IN OUT
GND
LT6656
Figure 5a. Low Noise Reference Use LT6656 for a Low Current Starting Reference
Figure 5b. Noise Density, Reference Buffer
Figure 5c. Reference Buffer Transient Response
* 2.7k + 22µF FILTER
OP AMP, 44µF CLOAD
OP AMP
FILTERED REFERENCE
REFERENCE OUTPUT
INSTRUMENT ONLY
FREQUENCY (kHz)
0.1
1
10
100
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
NOISE DENSITY (nVrms/rt(Hz))
6258 F05b
This circuit takes advantage of the ability of the LTC6259 to
drive large capacitive loads. Use of a large output capacitor
attached to the LT6659 enables significant bypassing of
follow-on circuits that use the reference voltage. In total, the
combination of LT6656 and LTC6259, in this configuration,
develops a reference voltage, with low noise, at low power,
and with appreciably large available bypass capacitance.
Voltage spectral noise densities are shown in Figure 5b.
Larger noise from the reference below 10kHz noticeably
drops down once a filter (RIN1 and CIN1) follow the refer-
ence. The op amp, configured in unity gain, with a large
44µF load, remains stable and contributes only a small
amount of low frequency noise. Figure 5c shows the tran-
sient response of the combination of RIN1-CIN1 filter and
op amp circuit, with and without the 44µF output capacitor.
Figure 5c shows the time domain response of the refer-
ence buffer.
The total measured supply current consumption is 21µA.
Analog LED Control
Figure 6a shows a voltage controlled LED drive circuit.
When VIN is at 0V, the op amp supply current is nominally
20μA. The offset, for example, could be 450µV, appears
across R1, inducing a 0.45mA current in the LED. Some
applications want a guaranteed zero LED current at
VIN = 0, and this is the purpose of R5. R5 forces 2.5μA
current through R7, creating a negative 0.6mV sense offset.
This offset guarantees a zero LED current.
INPUT
NO 44µF OUTPUT CAP
ADD 44µF OUTPUT CAP
200ms/Div
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
VOLTS (V)
6258 F05c
LTC6258/LTC6259/LTC6260
18
6258960fa
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APPLICATIONS INFORMATION
Figure 6a. Lower Power LED Driver with Voltage Command
Figure 6b. LED Current
–
+
D1
D
M1
2N7002
R1
1Ω
R6
100k
R7
237Ω
R4
51Ω
R5
2M
LTC6258
5V
R3
2.2k
R2
97.6k
VIN
C1
100nF
6258 F06a
C2
10nF
VG
Indeed, the circuit works nicely. Once the input voltage is
near 0, the LED current output is 0 and the total supply
current is 20µA. Gain from the input voltage to LED cur-
rent is 0.022A/V, as can be taken from the R2/R3 voltage
divider and the sense resistor value.
LED Current =
V
IN
R1
•
R3
R2+R3
Self-Oscillating LED Driver
Taking the circuit of the above application a step further,
the circuit of Figure 7a combines edge detection with use
of the shutdown pin of the LTC6259. R2 and R3 bring in
a divided down copy of the supply voltage as a reference
into the positive terminal. The op amp forces this voltage
on the sense resistor RSENSE in “LED ON” operation. In
that sense this circuit is similar to the one above.
20 µA SUPPLY WHEN LED OFF
MEASURED
CALCULATED
INPUT VOLTAGE (V)
0
1
2
3
4
5
0
20
40
60
80
100
LED CURRENT (mA)
6258 F06b
However, whereas the previous circuit assumes an
always-on operation mode, this new circuit hijacks the
shutdown pin. C2 can AC couple fast action signals into
the signal VC. Hence when the gate voltage VG increases
when “LED ON” begins, VC will suddenly rise. VC connects
to the shutdown pin; a rising edge on the shutdown pin
enables the LTC6259, which is already active, to stay on.
However, M3 is also on while M1 is on, and as a result
will work with R9 to charge C2 slowly until VC falls below
the shutdown threshold. At that moment, the active low
shutdown kicks in, and the LTC6259 turns off. A negative
falling VG voltage again feeds through C2, and a falling
VC and hence a falling shutdown pin voltage keeps the
circuit in an “LED OFF” state for some time. M3 turns off,
and C2 discharges until VC is high enough to reactivate
the LTC6259.
It may seem a bit odd to develop such a circuit when a
microprocessor or a LTC6992 can provide on-off capabil-
ity in combination with a single MOSFET and resistor. The
problem with those circuits, however
, is the lack of control
over the LED current. In the circuit of this application, a
voltage is controlled across a sense resistor. There is no
dependence on the LED voltage in how much current drives
the LED. And generation of the on-off, or blinking, comes
with the addition of only a handful of low cost components.
LTC6258/LTC6259/LTC6260
6258960fa
19
For more information www.linear.com/LTC6258
APPLICATIONS INFORMATION
It is interesting to note that the LED current depends on
the supply in this implementation in as much as the supply
feeds through R2 and R3 to create a reference. The supply
also figures into the time of the on and off cycle since the
supply powers the edge detection and relaxation part of
the circuitry. When the supply falls, the LED current drops
and the cycle time increases. This change of behavior
can help in battery powered LED blinking applications to
predict end of life.
The figure shows the sense resistor voltage (red) and the
shutdown pin voltage (blue). The shutdown voltage is
tied to VC; the gate drive couples through C2 as already
described.
Components RF and CF may apparently slow edges down
greatly. Adding this much delay is not essential, but it can
help to smooth out any hiccups that occur when the part
goes through a startup sequence after the shutdown pin
goes inactive. 47µs as a time constant is insignificant in
the time scale of the blinking (10’s or 100’s of ms). The
47µs is much smaller than any time constant associated
with C2 and its resistors.
VG
VG
VC
VC
R4
51Ω
M1
2N7002
LED
D
RSENSE
10Ω
R2
275k
R3
15k
C1
1nF
C2
1µF
RGATE
10k
R5
1M
R8
1M
M3
2N7002
6258 F07a
R7
470k
R9
140k
U2
LTC6258
RF
100Ω
CF
470nF
5V
–
+
Figure 7a. LED Driver with Self-Oscillation
Figure 7b. LED Blinker Circuit
50ms/Div
–60.0
0
120.0
180.0
240.0
300.0
0
1.0
2.0
3.0
4.0
SENSE RESISTOR VOLTAGE (mV)
SHUTDOWN PIN VOLTAGE (V)
6258 F07b
LTC6258/LTC6259/LTC6260
20
6258960fa
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTCLTC6258#packaging for the most recent package drawings.
1.50 – 1.75
(NOTE 4)
2.80 BSC
0.30 – 0.45
6 PLCS (NOTE 3)
DATUM ‘A’
0.09 – 0.20
(NOTE 3) S6 TSOT-23 0302
2.90 BSC
(NOTE 4)
0.95 BSC
1.90 BSC
0.80 – 0.90
1.00 MAX 0.01 – 0.10
0.20 BSC
0.30 – 0.50 REF
PIN ONE ID
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MA
X
0.62
MAX
0.95
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.4 MIN
2.62 REF
1.22 REF
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
LTC6258/LTC6259/LTC6260
6258960fa
21
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
1.50 – 1.75
(NOTE 4)
2.80 BSC
0.22 – 0.36
8 PLCS (NOTE 3)
DATUM ‘A’
0.09 – 0.20
(NOTE 3)
TS8 TSOT-23 0710 REV A
2.90 BSC
(NOTE 4)
0.65 BSC
1.95 BSC
0.80 – 0.90
1.00 MAX 0.01 – 0.10
0.20 BSC
0.30 – 0.50 REF
PIN ONE ID
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MAX
0.40
MAX
0.65
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.4 MIN
2.62 REF
1.22 REF
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637 Rev A)
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
LTC6258/LTC6259/LTC6260
22
6258960fa
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
MSOP (MS8) 0213 REV G
0.53 ±0.152
(.021 ±.006)
SEATING
PLANE
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.18
(.007)
0.254
(.010)
1.10
(.043)
MAX
0.22 – 0.38
(.009 – .015)
TYP
0.1016 ±0.0508
(.004 ±.002)
0.86
(.034)
REF
0.65
(.0256)
BSC
0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
1 2 34
4.90 ±0.152
(.193 ±.006)
8765
3.00 ±0.102
(.118 ±.004)
(NOTE 3)
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
0.52
(.0205)
REF
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
0.889 ±0.127
(.035 ±.005)
RECOMMENDED SOLDER PAD LAYOUT
0.42 ± 0.038
(.0165 ±.0015)
TYP
0.65
(.0256)
BSC
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev G)
LTC6258/LTC6259/LTC6260
6258960fa
23
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
MSOP (MS) 0213 REV F
0.53 ±0.152
(.021 ±.006)
SEATING
PLANE
0.18
(.007)
1.10
(.043)
MAX
0.17 –0.27
(.007 – .011)
TYP
0.86
(.034)
REF
0.50
(.0197)
BSC
1234 5
4.90 ±0.152
(.193 ±.006)
0.497 ±0.076
(.0196 ±.003)
REF
8910 76
3.00 ±0.102
(.118 ±.004)
(NOTE 3)
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.254
(.010) 0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
0.889 ±0.127
(.035 ±.005)
RECOMMENDED SOLDER PAD LAYOUT
0.305 ±0.038
(.0120 ±.0015)
TYP
0.50
(.0197)
BSC
0.1016 ±0.0508
(.004 ±.002)
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661 Rev F)
LTC6258/LTC6259/LTC6260
24
6258960fa
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6260#packaging for the most recent package drawings.
MSOP (MS16) 0213 REV A
0.53 ±0.152
(.021 ±.006)
SEATING
PLANE
0.18
(.007)
1.10
(.043)
MAX
0.17 –0.27
(.007 – .011)
TYP
0.86
(.034)
REF
0.50
(.0197)
BSC
16151413121110
12345678
9
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.254
(.010) 0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
5.10
(.201)
MIN
3.20 – 3.45
(.126 – .136)
0.889 ±0.127
(.035 ±.005)
RECOMMENDED SOLDER PAD LAYOUT
0.305 ±0.038
(.0120
±.0015)
TYP
0.50
(.0197)
BSC
4.039 ±0.102
(.159 ±.004)
(NOTE 3)
0.1016 ±0.0508
(.004 ±.002)
3.00 ±0.102
(.118 ±.004)
(NOTE 4)
0.280 ±0.076
(.011 ±.003)
REF
4.90 ±0.152
(.193 ±.006)
MS Package
16-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1669 Rev A)
LTC6258/LTC6259/LTC6260
6258960fa
25
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6258#packaging for the most recent package drawings.
2.00 ±0.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
0.40 ±0.10
BOTTOM VIEW—EXPOSED PAD
0.60 ±0.10
(2 SIDES)
0.75 ±0.05
R = 0.125
TYP
R = 0.05
TYP
1.37 ±0.10
(2 SIDES)
1
3
64
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
0.200 REF
0.00 – 0.05
(DC6) DFN REV C 0915
0.25 ±0.05
0.50 BSC
0.25 ±0.05
1.37 ±0.10
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.60 ±0.10
(2 SIDES)
1.15 ±0.05
0.70 ±0.05
2.55 ±0.05
PACKAGE
OUTLINE
0.50 BSC
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
DC6 Package
6-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1703 Rev C)
LTC6258/LTC6259/LTC6260
26
6258960fa
For more information www.linear.com/LTC6258
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC6259#packaging for the most recent package drawings.
2.00 ±0.10
(4 SIDES)
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
0.40 ±0.10
BOTTOM VIEW—EXPOSED PAD
0.64 ±0.10
(2 SIDES)
0.75 ±0.05
R = 0.115
TYP
R = 0.05
TYP
1.37 ±0.10
(2 SIDES)
1
4
85
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
0.200 REF
0.00 – 0.05
(DC8) DFN 0409 REVA
0.23 ±0.05
0.45 BSC
0.25 ±0.05
1.37 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.64 ±0.05
(2 SIDES)
1.15 ±0.05
0.70 ±0.05
2.55
±0.05
PACKAGE
OUTLINE
0.45 BSC
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
DC8 Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1719 Rev A)
LTC6258/LTC6259/LTC6260
6258960fa
27
For more information www.linear.com/LTC6258
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER
A 04/17 Added SOT-23 package. 1, 2, 3, 20
LTC6258/LTC6259/LTC6260
28
6258960fa
For more information www.linear.com/LTC6258
LINEAR TECHNOLOGY CORPORATION 2017
LT 0417 REV A • PRINTED IN USA
www.linear.com/LTC6258
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC6255/LTC6256/
LTC6257
6.5MHz, 65µA Power Efficient RR Op Amp 6.5MHz, 65µA, RR IN/OUT, 1.8V to 5.25V
LTC6261/LTC6262/
LTC6263
30MHz, 240µA Power Efficient RR Op Amp 30MHz, 240µA, RR IN/OUT, 1.8V to 5.25V
LTC6246/LTC6247/
LTC6248
180MHz, 1mA, Power Efficient Rail-to-Rail Op Amps 180MHz GBW, 1mA, 500μV VOS, RR In/Out, 2.5V to 5.25V, 90V/µs
Slew Rate
LT1498/LT1499 10MHz, 6V/µs, Dual/Quad,Rail-to-Rail Input and Output,
Precision C-Load Op Amps
10MHz GBW, 1.7mA, 475μV VOS, RR In/Out, 2.2V to ±15V, 10nF CLOAD
LTC6081/LTC6082 Precision Dual/Quad CMOS Rail-to-Rail Input/Output
Amplifiers
3.6MHz GBW, 330μA, 70μV VOS, RR In/Out, 2.7V to 5.5V, 100dB CMRR
LTC2050/LTC2051/
LTC2052
Zero-Drift Operational Amplifiers in SOT-23 3MHz GBW, 800μA, 3μV VOS, V– to V+ – 1V In, RR Out, 2.7V to 6V, 130dB
CMRR/PSRR
LTC1050/LTC1051/
LTC1052
Precision Zero-Drift, Operational Amplifierwith Internal
Capacitors
2.5MHz GBW, 1mA, 5μV VOS, V– to V+ – 2.3V In, RR Out, 4.75V to 16V,
120dB CMRR, 125dB PSRR
LTC6084/LTC6085 Dual/Quad 1.5MHz, Rail-to-Rail, CMOS Amplifiers 1.5MHz GBW, 110μA, 750μV VOS, RR In/Out, 2.5V to 5.5V
LT1783 1.25MHz, Over-The-Top
®
Micropower, Rail-to-Rail Input
and Output Op Amp in SOT-23
1.25MHz GBW, 300μA, 800μV VOS, RR In/Out, 2.5V to 18V
LT1637/LT1638/
LT1639
1.1MHz, 0.4V/μs Over-The-Top Micropower, Rail-to-Rail
Input and Output Op Amps
1.1MHz GBW, 250μA, 350μV VOS, RR In/Out, 2.7V to 44V, 110dB CMRR
LTC2054/LTC2055 Single/Dual Micropower Zero-Drift Operational Amplifiers 500kHz GBW, 150μA, 3μV VOS, V– to V+ – 0.5V In, RR Out, 2.7V to 6V
LT6010/LT6011/
LT6012
135μA, 14nV/√Hz, Rail-to-Rail Output Precision Op Amp
with Shutdown
330kHz GBW, 135μA, 35μV VOS, V– + 1.0V to V+ – 1.2V In, RR Out,
2.7V to 36V
LT1782 Micropower
, Over-The-Top, SOT-23, Rail-to-Rail Input and
Output Op Amp
200kHz GBW, 55μA, 800μV VOS, RR In/Out, 2.5V to 18V
LT1636 Over-The-Top, Micropower Rail-to-Rail, Input and Output
Op Amp
200kHz GBW, 50μA, 225μV VOS, RR In/Out, 2.7V to 44V, –40°C to 125°C
LT1490A/LT1491A Dual/Quad Over-The-Top, Micropower Rail-to-Rail Input
and Output Op Amps
200kHz GBW, 50μA, 500μV VOS, RR In/Out, 2V to 44V
LT2178/LT2179 17μA Max, Dual and Quad, Single Supply, Precision
Op Amps
85kHz GBW, 17μA, 70μV VOS, RR In/Out, 5V to 44V
LT6000/LT6001/
LT6002
Single, Dual and Quad, 1.8V, 13μA Precision Rail-to-Rail
Op Amps
50kHz GBW, 16μA , 600μV VOS(MAX), RR In/Out, 1.8V to 18V
VG
VG
VC
VC
R4
51Ω
M1
2N7002
LED
D
RSENSE
10Ω
R2
275k
R3
15k
C1
1nF
C2
1µF
RGATE
10k
R5
1M
R8
1M
M3
2N7002
6258 TA03
R7
470k
R9
140k
U2
LTC6258
RF
100Ω
CF
470nF
5V
–
+
50ms/Div
–60.0
0
120.0
180.0
240.0
300.0
0
1.0
2.0
3.0
4.0
SENSE RESISTOR VOLTAGE (mV)
SHUTDOWN PIN VOLTAGE (V)
6258 TA04
LED Driver with Self Oscillation LED Blinker Current