LTC6252/LTC6253/LTC6254
1
625234fc
TYPICAL APPLICATION
DESCRIPTION
720MHz, 3.5mA Power
Efficient Rail-to-Rail
I/O Op Amps
The LTC
®
6252/LTC6253/LTC6254 are single/dual/quad low
power, high speed unity gain stable rail-to-rail input/output
operational amplifiers. On only 3.5mA of supply current
they feature a 720MHz gain-bandwidth product, 280V/µs
slew rate and a low 2.75nV/√Hz of input-referred noise.
The combination of high bandwidth, high slew rate, low
power consumption and low broadband noise makes the
LTC6252 family unique among rail-to-rail input/output op
amps with similar supply currents. They are ideal for lower
supply voltage high speed signal conditioning systems.
The LTC6252 family maintains high efficiency performance
from supply voltage levels of 2.5V to 5.25V and is fully
specified at supplies of 2.7V and 5.0V.
For applications that require power-down, the LTC6252 and
the LTC6253 in MS10 offer a shutdown pin which disables
the amplifier and reduces current consumption to 42µA.
The LTC6252 family can be used as a plug-in replacement
for many commercially available op amps to reduce power
or to improve input/output range and performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
FEATURES
APPLICATIONS
n Gain Bandwidth Product: 720MHz
n –3dB Frequency (AV = 1): 400MHz
n Low Quiescent Current: 3.5mA Max
n High Slew Rate: 280V/µs
n Input Common Mode Range Includes Both Rails
n Output Swings Rail-to-Rail
n Low Broadband Voltage Noise: 2.75nV/√Hz
n Power-Down Mode: 42μA
n Fast Output Recovery
n Supply Voltage Range: 2.5V to 5.25V
n Input Offset Voltage: 350µV Max
n Large Output Current: 90mA
n CMRR: 105dB
n Open Loop Gain: 60V/mV
n Operating Temperature Range: –40°C to 125°C
n Single in 6-Pin TSOT-23
n Dual in MS8, 2mm × 2mm DFN, 8-Pin TS0T-23, MS10
n Quad in MS16
n Low Voltage, High Frequency Signal Processing
n Driving A/D Converters
n Rail-to-Rail Buffer Amplifiers
n Active Filters
n Battery Powered Equipment
5V Single-Supply 16-Bit ADC Driver LTC6253 Driving LTC2393-16
16-Bit ADC 5V Single-Supply
Performance
5V
0.1µF10µF
5V
5V
~2.08V
0.1µF10µF
SER/PAR
BYTESWAP
OB/2C
CS
RD
BUSY
PARALLEL
OR
SERIAL
INTERFACE
OGND
625234 TA01
IN–
IN+
3900pF
249Ω 100Ω
249Ω 100Ω
VIN
27.4mV TO
(3.5V + 27.4mV)
GND
RESETCNVST
PD
SAMPLE CLOCK
REFOUT
REFIN
AVP DVP
LTC2393-16
OVP
1.8V TO 5V
16 BIT
VCM
1µF10µF
2.5k2.5k143Ω
845Ω
4.7µF
–
+
½ LTC6253
5V
–
+
½ LTC6253
FREQUENCY (kHz)
0
AMPLITUDE (dBFS)
0
–80
–20
–40
–60
–100
–120
–140
–160 200 400100 300
624678 TA01b
500
fS = 1Msps
F1 = 20.111kHz
F1 AMPLITUDE
= –1.032dBFS
SNR = 93.28dB
THD = –100.50dB
SINAD = 92.53dB
SFDR = 104.7dB
F2 = –106.39dBc
F3 = –104.70dBc
F4 = –114.13dBc
F5 = –105.48dBc
LTC6252/LTC6253/LTC6254
2
625234fc
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6252CS6#TRMPBF LTC6252CS6#TRPBF LTFRW 6-Lead Plastic TSOT-23 0°C to 70°C
LTC6252IS6#TRMPBF LTC6252IS6#TRPBF LTFRW 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC6252HS6#TRMPBF LTC6252HS6#TRPBF LTFRW 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC6253CDC#TRMPBF LTC6253CDC#TRPBF LFRZ 8-Lead (2mm × 2mm) Plastic DFN 0°C to 70°C
LTC6253IDC#TRMPBF LTC6253IDC#TRPBF LFRZ 8-Lead (2mm × 2mm) Plastic DFN –40°C to 85°C
LTC6253CMS8#PBF LTC6253CMS8#TRPBF LTFRX 8-Lead Plastic MSOP 0°C to 70°C
LTC6253IMS8#PBF LTC6253IMS8#TRPBF LTFRX 8-Lead Plastic MSOP –40°C to 85°C
LTC6253HMS8#PBF LTC6253HMS8#TRPBF LTFRX 8-Lead Plastic MSOP –40°C to 125°C
LTC6253CTS8#TRMPBF LTC6253CTS8#TRPBF LTFRY 8-Lead Plastic TSOT-23 0°C to 70°C
LTC6253ITS8#TRMPBF LTC6253ITS8#TRPBF LTFRY 8-Lead Plastic TSOT-23 –40°C to 85°C
LTC6253HTS8#TRMPBF LTC6253HTS8#TRPBF LTFRY 8-Lead Plastic TSOT-23 –40°C to 125°C
Total Supply Voltage (V+ to V–) ................................ 5.5V
Input Current (+IN, –IN, SHDN) (Note 2) .............. ±10mA
Output Current (Note 3) .....................................±100mA
Operating Temperature Range (Note 4).. –40°C to 125°C
Specified Temperature Range (Note 5) .. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Junction Temperature ........................................... 150°C
Lead Temperature (Soldering, 10 sec)
MSOP, TSOT Packages Only ............................. 300°C
OUT 1
V– 2
+IN 3
6 V+
5 SHDN
4 –IN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
+–
TJMAX = 150°C, qJA = 192°C/W (NOTE 9)
TOP VIEW
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
9
4
1
2
36
5
7
8
+
–
+
–
TJMAX = 125°C, qJA = 102°C/W (NOTE 9)
EXPOSED PAD (PIN 9) IS V–, MUST BE SOLDERED TO PCB
1
2
3
4
OUT A
–IN A
+IN A
V–
8
7
6
5
V+
OUT B
–IN B
+IN B
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
+
–
+
–
TJMAX = 150°C, qJA = 163°C/W (NOTE 9)
1
2
3
4
5
OUT A
–IN A
+IN A
V–
SHDNA
10
9
8
7
6
V+
OUT B
–IN B
+IN B
SHDNB
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
+
–
+
–
TJMAX = 150°C, qJA = 160°C/W (NOTE 9)
OUT A 1
–IN A 2
+IN A 3
V– 4
8 V+
7 OUT B
6 –IN B
5 +IN B
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
+
–
+
–
TJMAX = 150°C, qJA = 195°C/W (NOTE 9)
1
2
3
4
5
6
7
8
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
16
15
14
13
12
11
10
9
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
+
–
+
–
+
–
+
–
TJMAX = 150°C, qJA = 125°C/W (NOTE 9)
(Note 1)
LTC6252/LTC6253/LTC6254
3
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(VS = 5V) The l denotes the specifications which apply across the
specified temperature range, otherwise specifications are at TA = 25°C. For each amplifier VS = 5V, 0V; VSHDN = 2V; VCM = VOUT =
2.5V, unless otherwise noted.
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6253CMS#PBF LTC6253CMS#TRPBF LTFSB 10-Lead Plastic MSOP 0°C to 70°C
LTC6253IMS#PBF LTC6253IMS#TRPBF LTFSB 10-Lead Plastic MSOP –40°C to 85°C
LTC6254CMS#PBF LTC6254CMS#TRPBF 6254 16-Lead Plastic MSOP 0°C to 70°C
LTC6254IMS#PBF LTC6254IMS#TRPBF 6254 16-Lead Plastic MSOP –40°C to 85°C
LTC6254HMS#PBF LTC6254HMS#TRPBF 6254 16-Lead Plastic MSOP –40°C to 125°C
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = Half Supply
l
–350
–1000
50 350
1000
µV
µV
VCM = V+ – 0.5V, NPN Mode
l
–2.2
–3.3
0.1 2.2
–3.3
mV
mV
DVOS Input Offset Voltage Match
(Channel-to-Channel) (Note 8)
VCM = Half Supply
l
–350
–550
50 350
550
µV
µV
VCM = V+ – 0.5V, NPN Mode
l
–2.75
–4
0.1 2.75
4
mV
mV
VOS TCInput Offset Voltage Drift l–3.5 µV/°C
IBInput Bias Current (Note 7) VCM = Half Supply
l
–0.75
–1.15
–0.1 0.75
1.15
µA
µA
VCM = V+ – 0.5V, NPN Mode
l
0.8
0.4
1.4 3.0
5.0
µA
µA
IOS Input Offset Current VCM = Half Supply
l
–0.5
–0.6
–0.03 0.5
0.6
µA
µA
VCM = V+ – 0.5V, NPN Mode
l
–0.5
–0.6
–0.03 0.5
0.6
µA
µA
enInput Noise Voltage Density f = 1MHz 2.75 nV/√Hz
Input 1/f Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P
inInput Noise Current Density f = 1MHz 4 pA/√Hz
CIN Input Capacitance Differential Mode
Common Mode
2.5
0.8
pF
pF
RIN Input Resistance Differential Mode
Common Mode
7.2
3
kΩ
MΩ
AVOL Large Signal Voltage Gain RL = 1k to Half Supply (Note 10)
l
35
16
60 V/mV
V/mV
RL = 100Ω to Half Supply (Note 10)
l
5
2.4
13 V/mV
V/mV
CMRR Common Mode Rejection Ratio VCM = 0V to 3.5V
l
85
82
105 dB
dB
LTC6252/LTC6253/LTC6254
4
625234fc
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VCMR Input Common Mode Range l0 VSV
PSRR Power Supply Rejection Ratio VS = 2.5V to 5.25V
VCM = 1V
l
66.5
62
70 dB
dB
Supply Voltage Range (Note 6) l2.5 5.25 V
VOL Output Swing Low (VOUT – V–) No Load
l
25 40
65
mV
mV
ISINK = 5mA
l
60 90
120
mV
mV
ISINK = 25mA
l
150 200
320
mV
mV
VOH Output Swing High (V+ – VOUT) No Load
l
65 100
120
mV
mV
ISOURCE = 5mA
l
115 170
210
mV
mV
ISOURCE = 25mA
l
270 330
450
mV
mV
ISC Output Short-Circuit Current Sourcing
l
–90 –40
–32
mA
mA
Sinking
l
60
40
100 mA
mA
ISSupply Current per Amplifier VCM = Half Supply
l
3.3 3.5
4.8
mA
mA
VCM = V+ – 0.5V
l
4.25 4.85
5.9
mA
mA
ISD Disable Supply Current VSHDN = 0.8V
l
42 55
75
µA
µA
ISHDNL SHDN Pin Current Low VSHDN = 0.8V
l
–3
–4
–1.6 0
0
µA
µA
ISHDNH SHDN Pin Current High VSHDN = 2V
l
–300
–600
35 300
600
nA
nA
VLSHDN Pin Input Voltage Low l0.8 V
VHSHDN Pin Input Voltage High l2 V
IOSD Output Leakage Current in Shutdown VSHDN = 0.8V, Output Shorted to Either
Supply
100 nA
tON Turn-On Time VSHDN = 0.8V to 2V 3.5 µs
tOFF Turn-Off Time VSHDN = 2V to 0.8V 2 µs
BW –3dB Closed Loop Bandwidth AV = 1, RL = 1k to Half Supply 400 MHz
GBW Gain-Bandwidth Product f = 4MHz, RL = 1k to Half Supply
l
450
320
720 MHz
MHz
tS, 0.1% Settling Time to 0.1% AV = 1, VO = 2V Step RL = 1k 36 ns
SR Slew Rate AV = –1, 4V Step (Note 11) 280 V/µs
FPBW Full Power Bandwidth VOUT = 4VP-P (Note 13) 9.5 MHz
(VS = 5V) The l denotes the specifications which apply across the
specified temperature range, otherwise specifications are at TA = 25°C. For each amplifier VS = 5V, 0V; VSHDN = 2V; VCM = VOUT =
2.5V, unless otherwise noted.
LTC6252/LTC6253/LTC6254
5
625234fc
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
HD2/HD3 Harmonic Distortion
RL = 1k to Half Supply
fC = 100kHz, VO = 2VP-P
fC = 1MHz, VO = 2VP-P
fC = 2.5MHz, VO = 2VP-P
fC = 4MHz, VO = 2VP-P
99/109
97/104
83/82
77/71
dBc
dBc
dBc
dBc
RL = 100Ω to Half Supply fC = 100kHz, VO = 2VP-P
fC = 1MHz, VO = 2VP-P
fC = 2.5MHz, VO = 2VP-P
fC = 4MHz, VO = 2VP-P
97/90
95/70
87/65
78/59
dBc
dBc
dBc
dBc
DGDifferential Gain (Note 14) AV = 2, RL = 150Ω, VS = ±2.5V
AV = 1, RL = 1kΩ, VS = ±2.5V
0.1
0.02
%
%
Dq Differential Phase (Note 14) AV = 2, RL = 150Ω, VS = ±2.5V
AV = 1, RL = 1kΩ, VS = ±2.5V
0.25
0.05
Deg
Deg
Crosstalk AV = –1, RL = 1k to Half Supply,
VOUT = 2VP-P, f = 2.5MHz
–96 dB
ELECTRICAL CHARACTERISTICS
(VS = 5V) The l denotes the specifications which apply across the
specified temperature range, otherwise specifications are at TA = 25°C. For each amplifier VS = 5V, 0V; VSHDN = 2V; VCM = VOUT =
2.5V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
(VS = 2.7V) The l denotes the specifications which apply across the
specified temperature range, otherwise specifications are at TA = 25°C. For each amplifier VS = 2.7V, 0V; VSHDN = 2V; VCM = VOUT =
1.35V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = Half Supply
l
0
–300
700 1250
1500
µV
µV
VCM = V+ – 0.5V, NPN Mode
l
–1.6
–2.0
0.9 3.2
3.4
mV
mV
DVOS Input Offset Voltage Match
(Channel-to-Channel) (Note 8)
VCM = Half Supply
l
–350
–750
10 350
750
µV
µV
VCM = V+ – 0.5V, NPN Mode
l
–2.8
–4
0.1 2.8
4
mV
mV
VOS TCInput Offset Voltage Drift l2.75 µV/°C
IBInput Bias Current (Note 7) VCM = Half Supply
l
–1000
–1500
–275 600
900
nA
nA
VCM = V+ – 0.5V, NPN Mode
l
0.6
0
1.175 2.5
4.0
µA
µA
IOS Input Offset Current VCM = Half Supply
l
–500
–600
–150 500
600
nA
nA
VCM = V+ – 0.5V, NPN Mode
l
–500
–600
–30 500
600
nA
nA
enInput Noise Voltage Density f = 1MHz 2.9 nV/√Hz
Input 1/f Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P
inInput Noise Current Density f = 1MHz 3.6 pA/√Hz
CIN Input Capacitance Differential Mode
Common Mode
2.5
0.8
pF
pF
RIN Input Resistance Differential Mode
Common Mode
7.2
3
kΩ
MΩ
AVOL Large Signal Voltage Gain RL = 1k to Half Supply
(Note 12)
l
16.5
7
36 V/mV
V/mV
RL = 100Ω to Half Supply
(Note 12)
l
2.3
1.8
6.9 V/mV
V/mV
LTC6252/LTC6253/LTC6254
6
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ELECTRICAL CHARACTERISTICS
(VS = 2.7V) The l denotes the specifications which apply across the
specified temperature range, otherwise specifications are at TA = 25°C. For each amplifier VS = 2.7V, 0V; VSHDN = 2V; VCM = VOUT =
1.35V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
CMRR Common Mode Rejection Ratio VCM = 0V to 1.2V
l
80
77
105 dB
dB
VCMR Input Common Mode Range l0 VSV
PSRR Power Supply Rejection Ratio VS = 2.5V to 5.25V
VCM = 1V
l
66.5
62
70 dB
dB
Supply Voltage Range (Note 6) l2.5 5.25 V
VOL Output Swing Low (VOUT – V–) No Load
l
22 28
40
mV
mV
ISINK = 5mA
l
80 100
140
mV
mV
ISINK = 10mA
l
110 150
190
mV
mV
VOH Output Swing High (V+ – VOUT) No Load
l
55 75
95
mV
mV
ISOURCE = 5mA
l
125 150
200
mV
mV
ISOURCE = 10mA
l
165 200
275
mV
mV
ISC Short-Circuit Current Sourcing
l
–35 –18
–14
mA
mA
Sinking
l
20
17
40 mA
mA
ISSupply Current per Amplifier VCM = Half Supply
l
2.9 3.5
4.5
mA
mA
VCM = V+ – 0.5V
l
3.7 4.6
5.5
mA
mA
ISD Disable Supply Current VSHDN = 0.8V
l
24 35
50
µA
µA
ISHDNLSHDN Pin Current Low VSHDN = 0.8V
l
–1
–1.5
–0.5 0
0
µA
µA
ISHDNHSHDN Pin Current High VSHDN = 2V
l
–300
–600
45 300
600
nA
nA
VLSHDN Pin Input Voltage l0.8 V
VHSHDN Pin Input Voltage l2.0 V
IOSD Output Leakage Current Magnitude in Shutdown VSHDN = 0.8V, Output Shorted to Either Supply 100 nA
tON Turn-On Time VSHDN = 0.8V to 2V 5 µs
tOFF Turn-Off Time VSHDN = 2V to 0.8V 2 µs
BW –3dB Closed Loop Bandwidth AV = 1, RL = 1k to Half Supply 350 MHz
GBW Gain-Bandwidth Product f = 4MHz, RL = 1k to Half Supply 630 MHz
tS, 0.1 Settling Time to 0.1% AV = +1, VO = 2V Step RL = 1k 34 ns
SR Slew Rate AV = –1, 2V Step (Note 11) 170 V/µs
FPBW Full Power Bandwidth VOUT = 2VP-P (Note 13) 8.5 MHz
Crosstalk AV = –1, RL = 1k to Half Supply,
VOUT = 2VP-P, f = 2.5MHz
96 dB
LTC6252/LTC6253/LTC6254
7
625234fc
ELECTRICAL CHARACTERISTICS
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. If any of
the input or shutdown pins goes 300mV beyond either supply or the
differential input voltage exceeds 1.4V the input current should be limited
to less than 10mA. This parameter is guaranteed to meet specified
performance through design and/or characterization. It is not production
tested.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output current is high. This
parameter is guaranteed to meet specified performance through design
and/or characterization. It is not production tested.
Note 4: The LTC6252C/LTC6253C/LTC6254C and LTC6252I/LTC6253I/
LTC6254I are guaranteed functional over the temperature range of –40°C
to 85°C. The LTC6252H/LTC6253H/LTC6254H are guaranteed functional
over the temperature range of –40°C to 125°C.
Note 5: The LTC6252C/LTC6253C/LTC6254C are guaranteed to meet
specified performance from 0°C to 70°C. The LTC6252C/LTC6253C/
LTC6254C are designed, characterized and expected to meet specified
performance from –40°C to 85°C but are not tested or QA sampled at
these temperatures. The LTC6252I/LTC6253I/LTC6254I are guaranteed
to meet specified performance from –40°C to 85°C. The LTC6252H/
LTC6253H/LTC6254H are guaranteed to meet specified performance from
–40°C to 125°C.
Note 6: Supply voltage range is guaranteed by power supply rejection ratio
test.
Note 7: The input bias current is the average of the average of the currents
at the positive and negative input pins.
Note 8: Matching parameters are the difference between amplifiers A and
D and between B and C on the LTC6254; between the two amplifiers on the
LTC6253.
Note 9: Thermal resistance varies with the amount of PC board metal
connected to the package. The specified values are with short traces
connected to the leads with minimal metal area.
Note 10: The output voltage is varied from 0.5V to 4.5V during
measurement.
Note 11: Middle 2/3 of the output waveform is observed. RL = 1k to half
supply.
Note 12: The output voltage is varied from 0.5V to 2.2V during
measurement.
Note 13: FPBW is determined from distortion performance in a gain of +2
configuration with HD2, HD3 < –40dBc as the criteria for a valid output.
Note 14: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R video
measurement set.
VOS Distribution, VCM = VS/2
(MS, PNP Stage)
VOS Distribution, VCM = VS/2
(TSOT-23, PNP Stage)
VOS Distribution, VCM = V+ – 0.5V
(MS, NPN Stage)
TYPICAL PERFORMANCE CHARACTERISTICS
INPUT OFFSET VOLTAGE (µV)
PERCENT OF UNITS (%)
40
30
20
5
0
35
25
15
10
625234 G01
25015050–50–150–250
VS = 5V, 0V
VCM = 2.5V
INPUT OFFSET VOLTAGE (µV)
PERCENT OF UNITS (%)
40
15
5
20
25
35
30
10
0–150 –50
625234 G02
15050 250–250
VS = 5V, 0V
VCM = 2.5V
INPUT OFFSET VOLTAGE (µV)
PERCENT OF UNITS (%)
16
12
8
2
14
10
6
4
0–1200 400–400
625234 G03
1200 2000–2000
VS = 5V, 0V
VCM = 4.5V
LTC6252/LTC6253/LTC6254
8
625234fc
TYPICAL PERFORMANCE CHARACTERISTICS
Offset Voltage vs Output Current Warm-Up Drift vs Time
Input Bias Current
vs Common Mode Voltage
Offset Voltage
vs Input Common Mode Voltage
VOS vs Temperature,
VS = 2.7V, 0V (MS, PNP Stage)
VOS Distribution, VCM = V+ – 0.5V
(TSOT-23, NPN Stage)
VOS vs Temperature,
VS = 2.7V, 0V (MS, NPN Stage)
VOS vs Temperature, VS = 5V, 0V
(MS, PNP Stage)
VOS vs Temperature, VS = 5V, 0V
(MS, NPN Stage)
INPUT COMMON MODE VOLTAGE (V)
0
OFFSET VOLTAGE (µV)
600
400
–200
0
–1600
200
–400
–600
–800
–1200
–1000
–1400
–1800
–2000 1.5 3.51 2.5 4.5
625234 G09
530.5 2 4
–55°C
VS = 5V, 0V
25°C
125°C
OUTPUT CURRENT (mA)
–100
OFFSET VOLTAGE (mV)
3.0
1.5
0.5
–1.0
1.0
2.5
2.0
0
–0.5
–1.5
–2.0
–2.5
–3.0 –75 25–25 75
625234 G10
1000–50 50
–55°C
25°C 125°C
VS = ±2.5V
TIME AFTER POWER-UP (sec)
0
CHANGE IN OFFSET VOLTAGE (µV)
20
10
15
5
020 10060 140
625234 G11
1608040 120
VS = ±2.5V
TA = 25°C
COMMON MODE VOLTAGE (V)
0
INPUT BIAS CURRENT (nA)
3000
2000
–3000
1000
0
–1000
–2000
–4000
–5000 1.5 3.51 2.5 4.5
625234 G12
530.5 2 4
–55°C
25°C
125°C
VS = 5V, 0V
INPUT OFFSET VOLTAGE (µV)
PERCENT OF UNITS (%)
18
12
14
10
4
16
8
6
2
0–1200
625234 G04
400 1200–400 2000–2000
VS = 5V, 0V
VCM = 4.5V
TEMPERATURE (°C)
VOLTAGE OFFSET (µV)
300
0
100
–100
–400
200
–200
–300
–500
–600 –15–35
625234 G05
5 25 65 85 105 125–55
VS = 5V, 0V
VCM = 2.5V
6 DEVICES
45
TEMPERATURE (°C)
VOLTAGE OFFSET (µV)
2000
1000
1500
500
–1000
0
–500
–1500
–2000
–2500 –15–35
625234 G06
5 25 65 85 105 125–55 45
VS = 5V, 0V
VCM = 4.5V
6 DEVICES
TEMPERATURE (°C)
VOLTAGE OFFSET (µV)
1200
1000
1100
800
900
700
600
500
400 –15–35
625234 G07
5 25 65 85 105 125–55 45
VS = 2.7V, 0V
VCM = 1.35V
6 DEVICES
TEMPERATURE (°C)
VOLTAGE OFFSET (µV)
3200
2200
2700
1700
1200
700
200
–1300
–800
–300
–1800 –15–35
625234 G08
5 25 65 85 105 125–55 45
VS = 2.7V, 0V
VCM = 2.2V
6 DEVICES
LTC6252/LTC6253/LTC6254
9
625234fc
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current Per Amplifier
vs SHDN Pin Voltage
SHDN Pin Current
vs SHDN Pin Voltage
Input Noise Voltage and Noise
Current vs Frequency
Input Bias Current vs Temperature
Supply Current
vs Supply Voltage (Per Amplifier)
0.1Hz to 10Hz Voltage Noise
TIME (1s/DIV)
0
VOLTAGE NOISE (500nV/DIV)
2000
1500
1000
500
0
–1000
–500
–1500
–2000 1 73 9
624678 G14
104 5 62 8
TOTAL SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
1.5
1.0
2.5
2.0
0.5
01 3
625234 G16
4 52
–55°C
25°C
125°C
TEMPERATURE (°C)
–55
INPUT BIAS CURRENT (nA)
3000
2000
0
2500
500
1500
1000
–500 355–25 95
624678 G13
12565
VS = 5V, 0V
VCM = 4.5V
VCM = 2.5V
FREQUENCY (Hz)
1
VOLTAGE NOISE (nV/√Hz)
CURRENT NOISE (pA/√Hz)
1000
100
10
1.0
0.1
10 1k 100M10M
624678 G15
10k 100k 1M100
in, VCM = 4.5V
in, VCM = 2.5V
en, VCM = 4.5V
en, VCM = 2.5V
Minimum Supply Voltage,
VCM = VS/2 (PNP Operation)
Minimum Supply Voltage,
VCM = V+ – 0.5V (NPN Operation)
Supply Current vs Input Common
Mode Voltage (Per Amplifier)
COMMON MODE VOLTAGE (V)
0.25 1.25
SUPPLY CURRENT (mA)
5
4
3
23.25
625234 G17
4.25 4.752.25
125°C
25°C
VS = 5V, 0V
AV = 1
–55°C
SHDN PIN VOLTAGE (V)
0
SUPPLY CURRENT (mA)
5.0
4.0
4.5
2.5
2.0
3.5
3.0
1.5
1.0
0.5
02.521.510.5 3.5
625234 G18
54 4.53
TA = 125°C
TA = 25°C
VS = 5V, 0V
VCM = 2.5V
TA = –55°C
SHDN PIN VOLTAGE (V)
0
SHDN PIN CURRENT (µA)
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
–1.50
–1.75
–2.00
–2.75
–2.50
–2.25
–3.00 2.521.510.5 3.5
625234 G19
54 4.53
TA = 125°C
TA = 25°C
VS = 5V, 0V
TA = –55°C
TOTAL SUPPLY VOLTAGE (V)
2
OFFSET VOLTAGE (mV)
16
10
12
14
8
6
4
2
0
–2 2.5 3.5
625234 G20
5.5
125°C
25°C
–55°C
4 4.5 53
VS = 5V, 0V
TOTAL SUPPLY VOLTAGE (V)
2
OFFSET VOLTAGE (mV)
16
10
12
14
8
6
4
2
0
–4
–2
2.5 3.5
625234 G21
5.5
125°C
–55°C
4 4.5 53
25°C
VS = 5V, 0V
LTC6252/LTC6253/LTC6254
10
625234fc
TYPICAL PERFORMANCE CHARACTERISTICS
Open Loop Gain and Phase
vs Frequency
Gain vs Frequency (AV = 1)
Gain vs Frequency (AV = 2)
Gain Bandwidth and Phase
Margin vs Supply Voltage
Open Loop Gain
Output Short-Circuit Current
vs Supply Voltage
Open Loop Gain
Output Saturation Voltage
vs Load Current (Output Low)
Output Saturation Voltage
vs Load Current (Output High)
LOAD CURRENT (mA)
OUTPUT HIGH SATURATION VOLTAGE (V)
625234 G22
10
1
0.1
0.01
0.01 10 10010.1
TA = 125°C
TA = 25°C
VS = ±2.5V
TA = –55°C
LOAD CURRENT (mA)
OUTPUT HIGH SATURATION VOLTAGE (V)
625234 G23
10
1
0.1
0.01
0.01 10 10010.1
TA = 125°C
VS = ±2.5V
TA = –55°C
TA = 25°C
TOTAL SUPPLY VOLTAGE (±V)
1.25
OUTPUT SHORT-CIRCUIT CURRENT (mA)
160
120
80
40
0
–40
–80
–120
–160 1.751.5
625234 G24
2.52 2.25
TA = 125°C
TA = 125°C
TA = –55°C
TA = –55°C
TA = 25°C
TA = 25°C
SINK
SOURCE
PULSE TESTED
OUTPUT VOLTAGE (V)
RL = 100Ω TO MID SUPPLY
VS = 5V, 0V
TA = 25°C
RL = 1k TO GND
RL = 1k TO MID SUPPLY
RL = 100Ω TO GND
0
INPUT OFFSET VOLTAGE (µV)
500
400
300
200
100
0
–100
–200
–300
–400
–500 2.5 3.5
625234 G25
54 4.521.510.5 3
OUTPUT VOLTAGE (V)
0
INPUT OFFSET VOLTAGE (µV)
1600
1400
600
800
1000
1200
400
200
0
–200
–400
–600 2.5
625234 G26
21.510.5
RL = 1k TO MID SUPPLY
VS = 2.7V, 0V
TA = 25°C
RL = 1k TO GND
RL = 100Ω TO MID SUPPLY
RL = 100Ω TO GND
FREQUENCY (MHz)
GAIN (dB)
625234 G27
2
0
–8
–6
–2
–4
–10
0.01 10 100 100010.1
VS = ±2.5V
TA = 25°C
RL = 1k
FREQUENCY (MHz)
GAIN (dB)
625234 G28
10
8
–4
–2
2
0
6
4
–6
0.01 10 100 100010.1
VS = ±2.5V
TA = 25°C
RL = 1k
RF = RG = 500
FREQUENCY (Hz)
GAIN (dB)
PHASE (DEG)
625234 G29
75
5
15
25
35
45
55
65
–5
120
30
45
60
75
90
105
15
0
300k 100M 1G10M1M
GAIN
TA = 25°C
RL = 1k
PHASE
VS = ±2.5V
VS = ±1.35V
VS = ±2.5V
VS = ±1.35V
TOTAL SUPPLY VOLTAGE (V)
2.5
GAIN BANDWIDTH (MHz)
PHASE MARGIN (DEG)
900
850
800
750
700
650
600
550
500
70
60
50
40
30
20
10
0
–10
3 3.5 4.5
625234 G30
5 5.254
TA = 25°C
RL = 1k
PHASE MARGIN
GAIN BANDWIDTH PRODUCT
LTC6252/LTC6253/LTC6254
11
625234fc
TYPICAL PERFORMANCE CHARACTERISTICS
Power Supply Rejection Ratio
vs Frequency
Series Output Resistor
vs Capacitive Load (AV = 1)
Series Output Resistor
vs Capacitive Load (AV = 2)
Output Impedance vs Frequency
Common Mode Rejection Ratio
vs Frequency
Gain Bandwidth and Phase
Margin vs Temperature
Slew Rate vs Temperature
Distortion vs Frequency
(AV = 1, 5V)
Distortion vs Frequency
(AV = 1, 2.7V)
TEMPERATURE (°C)
–55
GAIN BANDWIDTH (MHz)
PHASE MARGIN (DEG)
900
1000
1100
1200
800
700
600
500
60
80
70
50
40
30
20
10
–35 –15 4525
625234 G31
12565 85 1055
VS = ±2.5V
VS = ±1.35V
VS = ±2.5V
VS = ±1.35V
PHASE MARGIN
GAIN BANDWIDTH PRODUCT
TA = 25°C
RL = 1k
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
625234 G32
1000
10
100
1
0.1
0.01
0.0010.1 100 1000101
VS = ±2.5V
AV = 1
AV = 2
AV = 10
FREQUENCY (Hz)
COMMON MODE REJECTION RATIO (dB)
625234 G33
110
90
70
50
30
10
–10
10k 100k 1M 100M 1G10M
VS = ±2.5V
FREQUENCY (Hz)
10
POWER SUPPLY REJECTION RATIO (dB)
50
40
30
20
10
70
80
60
0
–10 100 1k 100k
625234 G34
1G100M10M1M10k
+PSRR
–PSRR
VS = ±2.5V
TEMPERATURE (°C)
–55
SLEW RATE (V/µs)
360
320
340
300
280
240
260
220
200
140
120
160
180
100 –30 45205 70
625234 G35
12095
AV = –1, RL = 1k,
VOUT = 4VP-P (±2.5V), 2VP-P (±1.35V)
SLEW RATE MEASURED AT
MIDDLE 2/3 OF OUTPUT
FALLING, VS = ±2.5V
RISING, VS = ±1.35V
FALLING, VS = ±1.35V
RISING, VS = ±2.5V
VS = ±2.5V
CAPACITIVE LOAD (pF)
10
OVERSHOOT (%)
80
70
60
50
40
30
20
10
0100 100001000
625234 G36
RS = 10Ω
RS = 20Ω
RS = 50Ω
+
–
VIN
RSVOUT
CL
VS = ±2.5V
CAPACITIVE LOAD (pF)
10
OVERSHOOT (%)
100
70
80
90
60
50
40
30
20
10
0100 100001000
625234 G37
+
–
VIN
RS
500Ω
500Ω
VOUT
CL
RS = 10Ω
RS = 20Ω
RS = 50Ω
VS = ±2.5V
FREQUENCY (MHz)
0.01
DISTORTION (dBc)
–20
–50
–60
–30
–40
–70
–80
–90
–100
–110
–120
–130 0.1 100101
625234 G38
RL = 100Ω, 2ND
RL = 100Ω, 3RD
RL = 1k, 2ND
RL = 1k, 3RD
VS = ±2.5V
VOUT = 2VP-P
AV = 1
FREQUENCY (MHz)
0.01
DISTORTION (dBc)
–20
–50
–60
–30
–40
–70
–80
–90
–100
–110
–120
–130 0.1 100101
625234 G39
RL = 100Ω, 2ND
RL = 100Ω, 3RD
RL = 1k, 2ND
RL = 1k, 3RD
VS = ±1.35V
VOUT = 1VP-P
AV = 1
LTC6252/LTC6253/LTC6254
12
625234fc
TYPICAL PERFORMANCE CHARACTERISTICS
Large Signal Response Small Signal Response Output Overdriven Recovery
0.1% Settling Time
vs Output Step (Noninverting)
0.1% Settling Time
vs Output Step (Inverting) SHDN Pin Response Time
Distortion vs Frequency
AV = 2, 2.7V)
Maximum Undistorted Output
Signal vs Frequency
Distortion vs Frequency
(AV = 2, 5V)
FREQUENCY (MHz)
0.01
DISTORTION (dBc)
–20
–50
–60
–30
–40
–70
–80
–90
–100
–110
–120
–130 0.1 100101
625234 G40
RL = 100Ω, 2ND
RL = 100Ω, 3RD
RL = 1k, 2ND
RL = 1k, 3RD
VS = ±2.5V
VOUT = 2VP-P
AV = 2
FREQUENCY (MHz)
0.01
DISTORTION (dBc)
–20
–50
–60
–30
–40
–70
–80
–90
–100
–110
–120
–130 0.1 100101
625234 G41
RL = 100Ω, 2ND
RL = 100Ω, 3RD
RL = 1k, 2ND
RL = 1k, 3RD
VS = ±1.35V
VOUT = 1VP-P
AV = 2
FREQUENCY (MHz)
0.01
OUTPUT VOLTAGE SWING (VP-P)
6
4
5
3
2
1
00.1 100101
625234 G42
VS = ±2.5V
TA = 25°C
RL = 1k
HD2, HD3 < –40dBc
AV = 2
AV = –1
OUTPUT STEP (V)
–4
SETTLING TIME (ns)
50
45
40
35
10
15
20
25
30
5
0–3 –1
625234 G43
40 1 32–2
VS = ±2.5V
AV = 1
TA = 25°C
+
–
VOUT
1k
VIN
OUTPUT STEP (V)
–4
SETTLING TIME (ns)
60
45
40
55
50
35
10
15
20
25
30
5
0–3 –1
625234 G44
40 1 32–2
VS = ±2.5V
AV = –1
TA = 25°C
+
–
VOUT
1k
500Ω
VIN
500Ω VOUT
0.8V/DIV
AV = 1
VS = ±2.5V
RL = 1k
VIN = 1.6V
VSHDN
2.5V/DIV
0V
0V
625234 G45
2µs/DIV
1V/DIV
0V
AV = 1
VS = ±2.5V
TA = 25°C
RL = 1k
625234 G46
100ns/DIV
INPUT
(50mV/DIV)
0V
OUTPUT
(50mV/DIV)
0V
VS = ±2.5V
RL = 1k
625234 G47
20ns/DIV
VOUT
2V/DIV
AV = ±2, TA = 25°C
VS = ±2.5V, VIN = 3VP-P
RL = 1k, RF = RG = 500Ω
VIN
1V/DIV
0V
0V
625234 G48
20ns/DIV
LTC6252/LTC6253/LTC6254
13
625234fc
APPLICATIONS INFORMATION
Circuit Description
The LTC6252/LTC6253/LTC6254 have an input and output
signal range that extends from the negative power supply
to the positive power supply. Figure 1 depicts a simplified
schematic of the amplifier. The input stage is comprised
of two differential amplifiers, a PNP stage, Q1/Q2, and an
NPN stage, Q3/Q4 that are active over different common
mode input voltages. The PNP stage is active between
the negative supply to nominally 1.2V below the positive
supply. As the input voltage approaches the positive sup-
ply, the 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, at the input stage, devices Q17
to Q19 act to cancel the bias current of the PNP input pair.
When Q1/Q2 are active, the current in Q16 is controlled to
be the same as the current in Q1 and Q2. Thus, the base
current of Q16 is nominally equal to the base current of
the input devices. The base current of Q16 is then mirrored
by devices Q17 to Q19 to cancel the base current of the
input devices Q1/Q2. A pair of complementary common
emitter stages, Q14/Q15, enable the output to swing from
rail-to-rail.
Figure 1. LTC6252/LTC6253/LTC6254 Simplified Schematic Diagram
–IN: Inverting Input of Amplifier. Input range from V–
to V+.
+IN: Non-Inverting Input of Amplifier. Input range from
V– to V+.
V+ : Positive Supply Voltage. Total supply voltage ranges
from 2.5V to 5.25V.
V– : Negative Supply Voltage. Typically 0V. This can be made
a negative voltage as long as 2.5V ≤ (V+ – V–) ≤ 5.25V.
SHDN: Active Low Shutdown. Threshold is typically 1.1V
referenced to V–. Floating this pin will turn the part on.
OUT: Amplifier Output. Swings rail-to-rail and can typically
source/sink over 90mA of current at a total supply of 5V.
PIN FUNCTIONS
625234 F01
Q15
ESDD5
Q14
C2
C1
BUFFER
AND
OUTPUT BIAS
R5R4
Q13
Q12
I3
V–
+
CC
Q8
R3
Q11
Q9
Q10
R2R1
Q2Q1Q3Q4
I1
+
I2
+
VBIAS
Q5
Q6Q19 Q7
D8
D7
Q18
Q17
D6
D5
ESDD2
V–
ESDD1
V+
ESDD4
V–
ESDD3
V+
Q16
V–
V+
+IN
–IN
ESDD6
OUT
LTC6252/LTC6253/LTC6254
14
625234fc
APPLICATIONS INFORMATION
Input Offset Voltage
The offset voltage will change depending upon which
input stage is active. The PNP input stage is active from
the negative supply rail to approximately 1.2V below the
positive supply rail, then the NPN input stage is activated
for the remaining input range up to the positive supply rail
with the PNP stage inactive. The offset voltage magnitude
for the PNP input stage is trimmed to less than 350µV with
5V total supply at room temperature, and is typically less
than 150μV. The offset voltage for the NPN input stage is
less than 2.2mV with 5V total supply at room temperature.
Input Bias Current
The LTC6252 family uses a bias current cancellation cir-
cuit to compensate for the base current of the PNP input
pair. T