LT1630/LT1631
1
16301fa
Typical applicaTion
FeaTures DescripTion
30MHz, 10V/µs, Dual/Quad
Rail-to-Rail Input and Output
Precision Op Amps
The LT
®
1630/LT1631 are dual/quad, rail-to-rail input and
output op amps with a 30MHz gain-bandwidth product
and a 10V/µs slew rate.
The LT1630/LT1631 have excellent DC precision over the
full range of operation. Input offset voltage is typically
less than 150µV and the minimum open-loop gain of one
million into a 10k load virtually eliminates all gain error.
To maximize common mode rejection, the LT1630/LT1631
employ a patented trim technique for both input stages,
one at the negative supply and the other at the positive
supply, that gives a typical CMRR of 106dB over the full
input range.
The LT1630/LT1631 maintain their performance for supplies
from 2.7V to 36V and are specified at 3V, 5V and ±15V
supplies. The inputs can be driven beyond the supplies
without damage or phase reversal of the output. The output
delivers load currents in excess of 35mA.
The LT1630 is available in 8-pin PDIP and SO packages
with the standard dual op amp pinout. The LT1631 features
the standard quad op amp configuration and is available
in a 14-pin plastic SO package. These devices can be used
as plug-in replacements for many standard op amps to
improve input/output range and performance.
Single Supply, 400kHz, 4th Order Butterworth Filter
applicaTions
n Gain-Bandwidth Product: 30MHz
n Slew Rate: 10V/µs
n Low Supply Current per Amplifier: 3.5mA
n Input Common Mode Range Includes Both Rails
n Output Swings Rail-to-Rail
n Input Offset Voltage, Rail-to-Rail: 525µV Max
n Input Offset Current: 150nA Max
n Input Bias Current: 1000nA Max
n Open-Loop Gain: 1000V/mV Min
n Low Input Noise Voltage: 6nV/√Hz Typ
n Low Distortion: –91dBc at 100kHz
n Wide Supply Range: 2.7V to ±15V
n Large Output Drive Current: 35mA Min
n Dual in 8-Pin PDIP and SO Packages
n Quad in Narrow 14-Pin SO Package
n Active Filters
n Rail-to-Rail Buffer Amplifiers
n Driving A/D Converters
n Low Voltage Signal Processing
n Battery-Powered Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
FREQUENCY (Hz)
0.1k
GAIN (dB)
1k 10k 100k 1M 10M
1630/31 TA02
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
VS = 3V, 0V
VIN = 2.5VP-P
Frequency Response
–
+
1/2 LT1630
2.32k
VIN
VS/2
VOUT
1630/31 TA01
220pF
2.32k 6.65k
–
+
1/2 LT1630
2.74k 22pF
470pF
5.62k
2.74k
47pF
LT1630/LT1631
2
16301fa
absoluTe MaxiMuM raTings
Total Supply Voltage (V+ to V–) ............................... 36V
Input Current ....................................................... ±10mA
Output Short-Circuit Duration (Note 2) ........ Continuous
Operating Temperature Range
C-Grade/I-Grade ................................. –40°C to 85°C
H-Grade ............................................. –40°C to 125°C
(Note 1)
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1630CN8#PBF LT1630CN8#TRPBF LT1630CN8 8-Lead PDIP –40°C to 85°C
LT1630CS8#PBF LT1630CS8#TRPBF 1630 8-Lead Plastic SO –40°C to 85°C
LT1630IN8#PBF LT1630IN8#TRPBF LT1630IN8 8-Lead PDIP –40°C to 85°C
LT1630IS8#PBF LT1630IS8#TRPBF 1630I 8-Lead Plastic SO –40°C to 85°C
LT1630HS8#PBF LT1630HS8#TRPBF 1630H 8-Lead Plastic SO –40°C to 125°C
LT1631CS#PBF LT1631CS#TRPBF LT1631CS 14-Lead Plastic SO –40°C to 85°C
LT1631IS#PBF LT1631IS#TRPBF LT1631IS 14-Lead Plastic SO –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard 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/
1
2
3
4
8
7
6
5
TOP VIEW
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
S8 PACKAGE
8-LEAD PLASTIC SO
N8 PACKAGE
8-LEAD PDIP
A
B
TJMAX = 150°C, θJA = 130°C/W (N8)
TJMAX = 150°C, θJA = 190°C/W (S8)
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUTA
–IN A
+IN A
V+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
AD
BC
TJMAX = 150°C, θJA = 150°C/W
pin conFiguraTion
Specified Temperature Range (Note 4) ..........................
C-Grade/I-Grade ................................. –40°C to 85°C
H-Grade ............................................. –40°C to 125°C
Junction Temperature ......................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
LT1630/LT1631
3
16301fa
elecTrical characTerisTics
TA = 25°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless
otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+
VCM = V–150
150
525
525
µV
µV
∆VOS Input Offset Shift VCM = V– to V+150 525 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V–, V+ (Note 5) 200 950 µV
IBInput Bias Current VCM = V+
VCM = V–0
–1000
540
–540
1000
0
nA
nA
∆IBInput Bias Current Shift VCM = V– to V+1080 2000 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ (Note 5)
VCM = V– (Note 5)
25
25
300
300
nA
nA
IOS Input Offset Current VCM = V+
VCM = V–20
20
150
150
nA
nA
∆IOS Input Offset Current Shift VCM = V– to V+40 300 nA
Input Noise Voltage 0.1Hz to 10Hz 300 nVP-P
enInput Noise Voltage Density f = 1kHz 6 nV/√Hz
inInput Noise Current Density f = 1kHz 0.9 pA/√Hz
CIN Input Capacitance 5 pF
AVOL Large-Signal Voltage Gain VS = 5V, VO = 300mV to 4.7V, RL = 10k
VS = 3V, VO = 300mV to 2.7V, RL = 10k
500
400
3500
2000
V/mV
V/mV
CMRR Common Mode Rejection Ratio VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+79
75
90
86
dB
dB
CMRR Match (Channel-to-Channel) (Note 5) VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+72
67
96
88
dB
dB
PSRR Power Supply Rejection Ratio VS = 2.7V to 12V, VCM = VO = 0.5V 87 105 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = 2.7V to 12V, VCM = VO = 0.5V 80 107 dB
Minimum Supply Voltage (Note 9) VCM = VO = 0.5V 2.6 2.7 V
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 0.5mA
ISINK = 25mA, VS = 5V
ISINK = 20mA, VS = 3V
14
31
600
500
30
60
1200
1000
mV
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 0.5mA
ISOURCE = 20mA, VS = 5V
ISOURCE = 15mA, VS = 3V
15
42
900
680
40
80
1800
1400
mV
mV
mV
mV
ISC Short-Circuit Current VS = 5V
VS = 3V
±20
±15
±41
±30
mA
mA
IS Supply Current per Amplifier 3.5 4.4 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz 15 30 MHz
SR Slew Rate (Note 8) VS = 5V, AV = –1, RL = Open, VO = 4V
VS = 3V, AV = –1, RL = Open
4.6
4.2
9.2
8.5
V/µs
V/µs
tSSettling Time VS = 5V, AV = 1, RL = 1k, 0.01%, VSTEP = 2V 520 ns
LT1630/LT1631
4
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of 0°C < TA < 70°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
175
175
700
700
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
2.5
1
5.5
3.5
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l175 750 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ – 0.1V (Note 5) l200 1200 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1100
585
–585
1100
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1170 2200 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
25
25
340
340
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
20
20
170
170
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l40 340 nA
AVOL Large-Signal Voltage Gain VS = 5V, VO = 300mV to 4.7V, RL = 10k
VS = 3V, VO = 300mV to 2.7V, RL = 10k
l
l
450
350
3500
2000
V/mV
V/mV
CMRR Common Mode Rejection Ratio VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
75
71
89
83
dB
dB
CMRR Match (Channel-to-Channel) (Note 5) VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
70
65
90
85
dB
dB
PSRR Power Supply Rejection Ratio VS = 3V to 12V, VCM = VO = 0.5V l82 101 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = 3V to 12V, VCM = VO = 0.5V l78 102 dB
Minimum Supply Voltage (Note 9) VCM = VO = 0.5V l2.6 2.7 V
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 0.5mA
ISINK = 25mA, VS = 5V
ISINK = 20mA, VS = 3V
l
l
l
l
17
36
700
560
40
80
1400
1200
mV
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 0.5mA
ISOURCE = 15mA, VS = 5V
ISOURCE = 10mA, VS = 3V
l
l
l
l
16
50
820
550
40
100
1600
1100
mV
mV
mV
mV
ISC Short-Circuit Current VS = 5V
VS = 3V
l
l
±18
±13
±36
±25
mA
mA
IS Supply Current per Amplifier l4.0 5.1 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l14 28 MHz
SR Slew Rate (Note 8) VS = 5V, AV = –1, RL = Open, VO = 4V
VS = 3V, AV = –1, RL = Open
l
l
4.2
3.9
8.3
7.7
V/µs
V/µs
LT1630/LT1631
5
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of –40°C < TA < 85°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
250
250
775
775
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
2.5
1
5.5
3.5
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l200 750 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ (Note 5) l210 1500 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1300
650
–650
1300
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1300 2600 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
25
25
390
390
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
25
25
195
195
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l50 390 nA
AVOL Large-Signal Voltage Gain VS = 5V, VO = 300mV to 4.7V, RL = 10k
VS = 3V, VO = 300mV to 2.7V, RL = 10k
l
l
400
300
3500
1800
V/mV
V/mV
CMRR Common Mode Rejection Ratio VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
75
71
87
83
dB
dB
CMRR Match (Channel-to-Channel) (Note 5) VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
69
65
89
85
dB
dB
PSRR Power Supply Rejection Ratio VS = 3V to 12V, VCM = VO = 0.5V l82 98 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = 3V to 12V, VCM = VO = 0.5V l78 102 dB
Minimum Supply Voltage (Note 9) VCM = VO = 0.5V l2.6 2.7 V
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 0.5mA
ISINK = 25mA, VS = 5V
ISINK = 20mA, VS = 3V
l
l
l
l
18
38
730
580
40
80
1500
1200
mV
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 0.5mA
ISOURCE = 15mA, VS = 5V
ISOURCE = 10mA, VS = 3V
l
l
l
l
15
55
860
580
40
110
1700
1200
mV
mV
mV
mV
ISC Short-Circuit Current VS = 5V
VS = 3V
l
l
±17
±12
±34
±24
mA
mA
IS Supply Current per Amplifier l4.1 5.2 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l14 28 MHz
SR Slew Rate (Note 8) VS = 5V, AV = –1, RL = Open, VO = 4V
VS = 3V, AV = –1, RL = Open
l
l
3.5
3.3
7
6.5
V/µs
V/µs
LT1630/LT1631
6
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of –40°C < TA < 125°C. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
345
345
950
950
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
2.5
1
5.5
3.5
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l200 750 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ (Note 5) l210 1500 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1300
650
–650
1300
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1300 2600 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
25
25
390
390
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
25
25
195
195
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l50 390 nA
AVOL Large-Signal Voltage Gain VS = 5V, VO = 300mV to 4.7V, RL = 10k
VS = 3V, VO = 300mV to 2.7V, RL = 10k
l
l
200
150
3100
1625
V/mV
V/mV
CMRR Common Mode Rejection Ratio VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
72
69
87
83
dB
dB
CMRR Match (Channel-to-Channel) (Note 5) VS = 5V, VCM = V– + 0.2V to V+ – 0.1V
VS = 3V, VCM = V– + 0.2V to V+ – 0.1V
l
l
67
63
89
85
dB
dB
PSRR Power Supply Rejection Ratio VS = 3V to 12V, VCM = VO = 0.5V l82 98 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = 3V to 12V, VCM = VO = 0.5V l78 102 dB
Minimum Supply Voltage (Note 9) VCM = VO = 0.5V l2.6 2.7 V
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 0.5mA
ISINK = 25mA, VS = 5V
ISINK = 20mA, VS = 3V
l
l
l
l
18
38
730
580
40
100
1600
1300
mV
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 0.5mA
ISOURCE = 15mA, VS = 5V
ISOURCE = 10mA, VS = 3V
l
l
l
l
15
55
860
580
40
120
1800
1300
mV
mV
mV
mV
ISC Short-Circuit Current VS = 5V
VS = 3V
l
l
±17
±12
±34
±24
mA
mA
IS Supply Current per Amplifier l4.1 5.6 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l13 28 MHz
SR Slew Rate (Note 8) VS = 5V, AV = –1, RL = Open, VO = 4V
VS = 3V, AV = –1, RL = Open
l
l
3.5
3.3
7
6.5
V/µs
V/µs
LT1630/LT1631
7
16301fa
elecTrical characTerisTics
TA = 25°C, VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+
VCM = V–220
220
1000
1000
µV
µV
∆VOS Input Offset Voltage Shift VCM = V– to V+150 1000 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V–, V+ (Note 5) 200 1500 µV
IBInput Bias Current VCM = V+
VCM = V–0
–1100
550
–550
1100
0
nA
nA
∆IBInput Bias Current Shift VCM = V– to V+1100 2200 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ (Note 5)
VCM = V– (Note 5)
20
20
300
300
nA
nA
IOS Input Offset Current VCM = V+
VCM = V–20
20
150
150
nA
nA
∆IOS Input Offset Current Shift VCM = V– to V+40 300 nA
Input Noise Voltage 0.1Hz to 10Hz 300 nVP-P
enInput Noise Voltage Density f = 1kHz 6 nV/√Hz
inInput Noise Current Density f = 1kHz 0.9 pA/√Hz
CIN Input Capacitance f = 100kHz 3 pF
AVOL Large-Signal Voltage Gain VO = –14.5V to 14.5V, RL = 10k
VO = –10V to 10V, RL = 2k
1000
650
5000
3500
V/mV
V/mV
Channel Separation VO = –10V to 10V, RL = 2k 112 134 dB
CMRR Common Mode Rejection Ratio VCM = V– to V+89 106 dB
CMRR Match (Channel-to-Channel) (Note 5) VCM = V– to V+86 110 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V 87 105 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = ±5V to ±15V 82 107 dB
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 5mA
ISINK = 25mA
16
150
600
35
300
1200
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISINK = 5mA
ISINK = 25mA
15
250
1200
40
500
2400
mV
mV
mV
ISC Short-Circuit Current ±35 ±70 mA
IS Supply Current per Amplifier 4.1 5.0 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz 15 30 MHz
SR Slew Rate AV = –1, RL = Open, VO = ±10V,
Measure at VO = ±5V
5 10 V/µs
tSSettling Time 0.01%, VSTEP = 10V, AV = 1, RL = 1k 1.2 µs
LT1630/LT1631
8
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of 0°C < TA < 70°C. VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
300
300
1250
1250
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
4.5
1.5
7
4
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l180 1100 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ – 0.1V (Note 5) l300 2000 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1200
600
–600
1200
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1200 2400 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
30
30
350
350
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
25
25
175
175
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l50 350 nA
AVOL Large-Signal Voltage Gain VO = –14.5V to 14.5V, RL = 10k
VO = –10V to 10V, RL = 2k
l
l
900
600
6000
4000
V/mV
V/mV
Channel Separation VO = –10V to 10V, RL = 2k l112 132 dB
CMRR Common Mode Rejection Ratio VCM = V– + 0.2V to V+ – 0.1V l88 104 dB
CMRR Match (Channel-to-Channel) (Note 5) VCM = V– + 0.2V to V+ – 0.1V l84 104 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V l86 100 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = ±5V to ±15V l80 104 dB
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
19
175
670
45
350
1400
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
15
300
1400
40
600
2800
mV
mV
mV
ISC Short-Circuit Current l±28 ±57 mA
IS Supply Current per Amplifier l4.6 5.6 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l14 28 MHz
SR Slew Rate AV = –1, RL = Open, VO = ±10V,
Measured at VO = ±5V
l4.5 9 V/µs
LT1630/LT1631
9
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of –40°C < TA < 85°C. VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
350
350
1400
1400
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
4.5
1.5
7
4
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l180 1200 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ – 0.1V (Note 5) l350 2200 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1400
690
–690
1400
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1380 2800 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
30
30
420
420
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
30
30
210
210
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l60 420 nA
AVOL Large-Signal Voltage Gain VO = –14.5V to 14.5V, RL = 10k
VO = –10V to 10V, RL = 2k
l
l
700
400
6000
4000
V/mV
V/mV
Channel Separation VO = –10V to 10V, RL = 2k l112 132 dB
CMRR Common Mode Rejection Ratio VCM = V– + 0.2V to V+ – 0.1V l87 104 dB
CMRR Match (Channel-to-Channel) (Note 5) VCM = V– + 0.2V to V+ – 0.1V l84 104 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V l84 100 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = ±5V to ±15V l80 100 dB
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
22
180
700
50
350
1400
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
15
300
1500
40
600
3000
mV
mV
mV
ISC Short-Circuit Current l±27 ±54 mA
IS Supply Current per Amplifier l4.8 5.9 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l14 27 MHz
SR Slew Rate AV = –1, RL = Open, VO = ±10V,
Measured at VO = ±5V
l4.2 8.5 V/µs
LT1630/LT1631
10
16301fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range of –40°C < TA < 125°C. VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
525
525
1600
1600
µV
µV
VOS TC Input Offset Voltage Drift (Note 3)
VCM = V+ – 0.1V
l
l
4.5
1.5
7
4
µV/°C
µV/°C
∆VOS Input Offset Voltage Shift VCM = V– + 0.2V to V+ – 0.1V l220 1300 µV
Input Offset Voltage Match (Channel-to-Channel) VCM = V– + 0.2V, V+ – 0.1V (Note 5) l350 2200 µV
IBInput Bias Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
0
–1500
750
–750
1500
0
nA
nA
∆IBInput Bias Current Shift VCM = V– + 0.2V to V+ – 0.1V l1380 2800 nA
Input Bias Current Match (Channel-to-Channel) VCM = V+ – 0.1V (Note 5)
VCM = V– + 0.2V (Note 5)
l
l
42
42
460
460
nA
nA
IOS Input Offset Current VCM = V+ – 0.1V
VCM = V– + 0.2V
l
l
30
30
210
210
nA
nA
∆IOS Input Offset Current Shift VCM = V– + 0.2V to V+ – 0.1V l60 420 nA
AVOL Large-Signal Voltage Gain VO = –14.5V to 14.5V, RL = 10k
VO = –10V to 10V, RL = 2k
l
l
700
400
6000
4000
V/mV
V/mV
Channel Separation VO = –10V to 10V, RL = 2k l112 132 dB
CMRR Common Mode Rejection Ratio VCM = V– + 0.2V to V+ – 0.1V l87 104 dB
CMRR Match (Channel-to-Channel) (Note 5) VCM = V– + 0.2V to V+ – 0.1V l84 104 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V l84 100 dB
PSRR Match (Channel-to-Channel) (Note 5) VS = ±5V to ±15V l80 100 dB
VOL Output Voltage Swing Low (Note 6) No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
22
180
700
60
400
1500
mV
mV
mV
VOH Output Voltage Swing High (Note 6) No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
15
300
1500
50
675
3300
mV
mV
mV
ISC Short-Circuit Current l±27 ±54 mA
IS Supply Current per Amplifier l4.8 6.4 mA
GBW Gain-Bandwidth Product (Note 7) f = 100kHz l13 27 MHz
SR Slew Rate AV = –1, RL = Open, VO = ±10V,
Measured at VO = ±5V
l4.2 8.5 V/µs
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: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 3: This parameter is not 100% tested.
Note 4: The LT1630C/LT1631C are guaranteed to meet specified
performance from 0°C to 70°C. The LT1630C/LT1631C and 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
LT1630I/LT1631I are guaranteed to meet specified performance from
–40°C to 85°C. The LT1630H is guaranteed to meet specified performance
from –40°C to 125°C.
Note 5: Matching parameters are the difference between amplifiers A and
D and between B and C on the LT1631; between the two amplifiers on the
LT1630.
Note 6: Output voltage swings are measured between the output and
power supply rails.
Note 7: VS = 3V, VS = ±15V GBW limit guaranteed by correlation to
5V tests.
Note 8: VS = 3V, VS = 5V slew rate limit guaranteed by correlation to
±15V tests.
Note 9: Minimum supply voltage is guaranteed by testing the change of
VOS to be less than 250µV when the supply voltage is varied from 3V to
2.7V.
LT1630/LT1631
11
16301fa
Typical perForMance characTerisTics
Supply Current vs Supply Voltage Supply Current vs Temperature
Input Bias Current
vs Common Mode Voltage
Input Bias Current vs Temperature
Output Saturation Voltage
vs Load Current (Output Low)
Output Saturation Voltage
vs Load Current (Output High)
VOS Distribution, VCM = 0V
(PNP Stage)
VOS Distribution, VCM = 5V
(NPN Stage) ∆VOS Shift for VCM = 0V to 5V
INPUT OFFSET VOLTAGE (µV)
–500
PERCENT OF UNITS (%)
50
40
30
20
10
0300
1630/31 G32
–300 –100 100 500
VS = 5V, 0V
VCM = 0V
INPUT OFFSET VOLTAGE (µV)
–500
PERCENT OF UNITS (%)
50
40
30
20
10
0300
1630/31 G33
–300 –100 100 500
VS = 5V, 0V
VCM = 5V
INPUT OFFSET VOLTAGE (µV)
–500
PERCENT OF UNITS (%)
50
40
30
20
10
0300
1630/31 G34
–300 –100 100 500
VS = 5V, 0V
TOTAL SUPPLY VOTAGE (V)
0 4
SUPPLY CURRENT PER AMPLIFIER (mA)
36
1630/31 G01
8 12 16 20 24 28 32
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
TA = 125°C
TA = –55°C
TA = 25°C
TEMPERATURE (°C)
–75
SUPPLY CURRENT PER AMPLIFIER (mA)
0
1630/31 G02
–50 –25 25
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0 50 75 125100
VS = ±15V
VS = 5V, 0V
COMMON MODE VOLTAGE (V)
–2
INPUT BIAS CURRENT (nA)
23456
1630/31 G03
–1 01
600
400
200
0
–200
–400
–600
–800
–1000
TA = 125°C
VS = 5V, 0V
TA = 25°C
TA = –55°C
TEMPERATURE (°C)
–50
INPUT BIAS CURRENT (µA)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0 70
1630/31 G04
–20 10 40
–35 85
–5 25 55 100
VS = 5V, 0V
VCM = 0V
VS = ±15V
VCM = 15V
VS = ±15V
VCM = –15V
VS = 5V, 0V
VCM = 5V
LOAD CURRENT (mA)
SATURATION VOLTAGE (V)
0.01 1 10 100
1630/31 G05
0.1
10
1
0.1
0.01
VS = 5V, 0V
TA = –55°C
TA = 125°C
TA = 25°C
LOAD CURRENT (mA)
SATURATION VOLTAGE (V)
0.01 1 10 100
1630/31 G06
0.1
10
1
0.1
0.01
VS = 5V, 0V
TA = –55°C
TA = 125°C
TA = 25°C
LT1630/LT1631
12
16301fa
Typical perForMance characTerisTics
0.1Hz to 10Hz Output
Voltage Noise Gain and Phase vs Frequency
Gain Bandwidth and Phase
Margin vs Supply Voltage
CMRR vs Frequency PSRR vs Frequency Channel Separation vs Frequency
Minimum Supply Voltage Noise Voltage Spectrum Current Noise Spectrum
TOTAL SUPPLY VOLTAGE (V)
1
0
CHANGE IN OFFSET VOLTAGE (µV)
50
100
150
200
2 3 45
1630/31 G07
250
300
TA = 125°C TA = –55°C
TA = 25°C
FREQUENCY (Hz)
1
NOISE VOLTAGE (nV/√Hz)
10 100 1000
11630/31 G09
35
30
25
20
15
10
5
0
VS = 5V, 0V
VCM = 2.5V
PNP ACTIVE
VCM = 4.25V
NPN ACTIVE
FREQUENCY (Hz)
1
4
CURRENT NOISE (pA/√Hz)
5
6
7
8
10 100 1000
1630/31 G10
3
2
1
0
9
10
VS = 5V, 0V
VCM = 2.5V
PNP ACTIVE
VCM = 4.25V
NPN ACTIVE
TIME (1s/DIV)
OUTPUT VOLTAGE (200nV/DIV)
1630/31 G25
VS =5V, 0V
VCM = VS/2
FREQUENCY (MHz)
VOLTAGE GAIN (dB)
PHASE SHIFT (DEG)
80
70
60
50
40
30
20
10
0
–10
–20
180
135
90
45
0
–45
–90
–135
–180
–225
–270
0.01 1 10 100
1630/31 G11
0.1
PHASE
GAIN
RL = 1k
VS = 3V, 0V
VS = ±15V
TOTAL SUPPLY VOLTAGE (V)
0
GAIN BANDWIDTH (MHz)
PHASE MARGIN (DEG)
510 15 20
1630/31 G14
25
50
45
40
35
30
25
20
15
10
5
0
100
90
80
70
60
50
40
30
20
10
0
30
PHASE MARGIN
GAIN BANDWIDTH
VCM = VS/2
FREQUENCY (Hz)
40
COMMON MODE REJECTION RATIO (dB)
60
80
70
100
120
30
50
90
110
1k 100k 1M 10M
1630/31 G12
20 10k
VS = ±15V
VS = 5V, 0V
FREQUENCY (Hz)
POWER SUPPLY REJECTION RATIO (dB)
100
90
80
70
60
50
40
30
20
10
01k 100k 1M 10M
1630/31 G13
10k
VS = ±15V
POSITIVE SUPPLY
NEGATIVE SUPPLY
FREQUENCY (Hz)
10
CHANNEL SEPARATION (dB)
100 1k 10k 100k 1M
1630/31 G15
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
LT1630/LT1631
13
16301fa
Typical perForMance characTerisTics
Open-Loop Gain Open-Loop Gain Open-Loop Gain
Warm-Up Drift vs Time
Maximum Undistorted Output
Signal vs Frequency
Total Harmonic Distortion + Noise
vs Frequency
Capacitive Load Handling Slew Rate vs Supply Voltage
Output Step vs
Settling Time to 0.01%
CAPACITIVE LOAD (pF)
1
OVERSHOOT (%)
10 100 1000
1630/31 G16
60
50
40
30
20
10
0
VS = 5V, 0V
AV = 1
RL = 1k
TOTAL SUPPLY VOLTAGE (V)
0
SLEW RATE (V/µs)
8 12 20 284 16 24 32
1630/31 G17
14
13
12
11
10
9
8
RISING EDGE
FALLING EDGE
VOUT = 80% OF VS
AV = –1
SETTLING TIME (µs)
0 0.25
–10
OUTPUT STEP (V)
–8
–4
–2
0
10
4
0.50 0.75 1.00
1630/31 G18
–6
6
8
2
1.25 1.50
VS = ±15V
NONINVERTING INVERTING
INVERTING
NONINVERTING
OUTPUT VOLTAGE (V)
–20 –15
INPUT VOLTAGE (µV)
0
10
20
1630/31 G19
–10
–20 –10 –5 0 5 10 15
20
–5
5
–15
15
VS = ±15V
RL = 1k
RL = 10k
OUTPUT VOLTAGE (V)
0
INPUT VOLTAGE (µV)
35
1630/31 G20
1 2 4
8
6
4
2
0
–2
–4
–6
–8 6
VS = 5V, 0V
RL = 1k
RL = 10k
OUTPUT VOLTAGE (V)
–5 –4 –3 –2 –1
INPUT VOLTAGE (µV)
200
150
100
50
0
–50
–100
–150
–200 3
1630/31 G21
10 2 4 6
5 7
VS = ±15V
RL = 100Ω
TIME AFTER POWER-UP (SEC)
0
CHANGE IN OFFSET VOLTAGE (µV)
40
0
–40
–80
–120
–160
–200 60 100 160
1630/31 G22
20 40 80 120 140
S8 PACKAGE
VS = ±15V
LT1631CS
VS = ±15V
N8 PACKAGE
VS = 5V, 0V
N8 PACKAGE
VS = ±15V
S8 PACKAGE
VS = 5V, 0V
LT1631CS
VS = 5V, 0V
FREQUENCY (kHz)
THD + NOISE (%)
1
0.1
0.01
0.001
0.00010.1 10 100
163031 G23
1
VIN = 2VP-P
RL = 10k
VS = 3V, 0V
AV = 1
VS = 5V, 0V
AV = 1
VS = 5V, 0V AND 3V, 0V
AV = –1
FREQUENCY (kHz)
1
OUTPUT VOLTAGE SWING (VP-P)
10 100 1000
1630/31 G24
5
4
3
2
1
0
VS = 5V, 0V
AV = –1
VS = 5V, 0V
AV = 1
LT1630/LT1631
14
16301fa
Typical perForMance characTerisTics
Harmonic Distortion vs Frequency 5V Small-Signal Response 5V Large-Signal Response
FREQUENCY (kHz)
100
HARMONIC DISTORTION (dBc)
0
–20
–40
–60
–80
–100 1000
1630/31 G30
200 500
3RD
2ND
2ND 3RD
VS = 5V, 0V
AV = 1
VIN = 2VP-P
RL = 150Ω
RL = 1k
VS = 5V, 0V
AV = 1
RL = 1k
163031 G26
VS = 5V, 0V
AV = 1
RL = 1k
163031 G27
Harmonic Distortion vs Frequency ±15V Small-Signal Response ±15V Large-Signal Response
FREQUENCY (kHz)
100
HARMONIC DISTORTION (dBc)
0
–20
–40
–60
–80
–100 1000
1630/31 G31
200 500
3RD
2ND
3RD
VS = 5V, 0V
AV = –1
VIN = 2VP-P
RL = 150Ω
RL = 1k
2ND
VS = ±15V
AV = 1
RL = 1k
163031 G28
VS = ±15V
AV = 1
RL = 1k
163031 G29
applicaTions inForMaTion
Rail-to-Rail Input and Output
The LT1630/LT1631 are fully functional for an input and
output signal range from the negative supply to the posi-
tive supply. Figure 1 shows a simplified schematic of the
amplifier. The input stage consists of two differential am-
plifiers, a PNP stage Q1/Q2 and an NPN stage Q3/Q4 that
are active over different ranges of input common mode
voltage. The PNP differential input pair is active for input
common mode voltages VCM between the negative supply
to approximately 1.4V below the positive supply. As VCM
moves closer toward the positive supply, the transis-
tor 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 rest of the input common
mode range up to the positive supply.
The output is configured with a pair of complementary
common emitter stages Q14/Q15 that enables the output
to swing from rail to rail. These devices are fabricated on
Linear Technology’s proprietary complementary bipolar
process to ensure similar DC and AC characteristics. Ca-
pacitors C1 and C2 form local feedback loops that lower
the output impedance at high frequencies.
LT1630/LT1631
15
16301fa
applicaTions inForMaTion
Q4
Q6
VBIAS
D6D5
+IN
D2
Q3
Q7
Q1
I1
I2
+
+
Q9
Q2
D4
D1
D3
–IN OUT
V–
V+
Q5
Q12
Q8
Q14
1630/31 F01
C1
R1
R6
225Ω
R7
225Ω
R3
V–CC
R4 R5
C2
R2
Q11 Q13 Q15
BUFFER
AND
OUTPUT BIAS
Figure 1. LT1630 Simplified Schematic Diagram
Power Dissipation
The LT1630/LT1631 amplifiers combine high speed and
large output current drive in a small package. Because
the amplifiers operate over a very wide supply range, it
is possible to exceed the maximum junction temperature
of 150°C in plastic packages under certain conditions.
Junction temperature, TJ, is calculated from the ambient
temperature, TA, and power dissipation, PD, as follows:
LT1630CN8: TJ = TA + (PD • 130°C/W)
LT1630CS8: TJ = TA + (PD • 190°C/W)
LT1631CS: TJ = TA + (PD • 150°C/W)
The power dissipation in the IC is the function of the
supply voltage, output voltage and load resistance. For
a given supply voltage, the worst-case power dissipation
PDMAX occurs at the maximum supply current and when
the output voltage is at half of either supply voltage (or the
maximum swing if less than 1/2 supply voltage). Therefore
PDMAX is given by:
PDMAX = (VS • ISMAX) + (VS/2)2/RL
To ensure that the LT1630/LT1631 are used properly,
calculate the worst-case power dissipation, get the ther-
mal resistance for a chosen package and its maximum
junction temperature to derive the maximum ambient
temperature.
Example: An LT1630CS8 operating on ±15V supplies and
driving a 500Ω, the worst-case power dissipation per
amplifier is given by:
PDMAX = (30V • 4.75mA) + (15V – 7.5V)(7.5/500)
= 0.143 + 0.113 = 0.256W
If both amplifiers are loaded simultaneously, then the
total power dissipation is 0.512W. The SO-8 package has
a junction-to-ambient thermal resistance of 190°C/W in
still air. Therefore, the maximum ambient temperature that
the part is allowed to operate is:
TA = TJ – (PDMAX • 190°C/W)
TA = 150°C – (0.512W • 190°C/W) = 53°C
For a higher operating temperature, lower the supply
voltage or use the DIP package part.
LT1630/LT1631
16
16301fa
applicaTions inForMaTion
Input Offset Voltage
The offset voltage changes depending upon which input
stage is active, and the maximum offset voltages are
trimmed to less than 525µV. To maintain the precision
characteristics of the amplifier, the change of VOS over the
entire input common mode range (CMRR) is guaranteed
to be less than 525µV on a single 5V supply.
Input Bias Current
The input bias current polarity depends on the input
common mode voltage. When the PNP differential pair is
active, the input bias currents flow out of the input pins.
They flow in the opposite direction when the NPN input
stage is active. The offset voltage error due to input bias
currents can be minimized by equalizing the noninverting
and inverting input source impedance.
Output
The outputs of the LT1630/LT1631 can deliver large load
currents; the short-circuit current limit is 70mA. Take care to
keep the junction temperature of the IC below the absolute
maximum rating of 150°C (refer to the Power Dissipation
section). The output of these amplifiers have reverse-biased
diodes to each supply. If the output is forced beyond either
supply, unlimited current will flow through these diodes.
If the current is transient and limited to several hundred
mA, no damage to the part will occur.
Overdrive Protection
To prevent the output from reversing polarity when the
input voltage exceeds the power supplies, two pairs of
crossing diodes D1 to D4 are employed. When the input
voltage exceeds either power supply by approximately
700mV, D1/D2 or D3/D4 will turn on, forcing the output
to the proper polarity. For this phase reversal protection
to work properly, the input current must be limited to less
than 5mA. If the amplifier is to be severely overdriven,
an external resistor should be used to limit the overdrive
current.
The LT1630/LT1631’s input stages are protected against
large differential input voltages by a pair of back-to-back
diodes D5/D6. When a differential voltage of more than
0.7V is applied to the inputs, these diodes will turn on,
preventing the emitter-base breakdown of the input transis-
tors. The current in D5/D6 should be limited to less than
10mA. Internal 225Ω resistors R6 and R7 will limit the
input current for differential input signals of 4.5V or less.
For larger input levels, a resistor in series with either or
both inputs should be used to limit the current. Worst-case
differential input voltage usually occurs when the output is
shorted to ground. In addition, the amplifier is protected
against ESD strikes up to 3kV on all pins.
Capacitive Load
The LT1630/LT1631 are wideband amplifiers that can
drive capacitive loads up to 200pF on ±15V supplies in a
unity-gain configuration. On a 3V supply, the capacitive
load should be kept to less than 100pF. When there is a
need to drive larger capacitive loads, a resistor of 20Ω
to 50Ω should be connected between the output and the
capacitive load. The feedback should still be taken from
the output so that the resistor isolates the capacitive load
to ensure stability.
Feedback Components
The low input bias currents of the LT1630/LT1631 make it
possible to use the high value feedback resistors to set the
gain. However, care must be taken to ensure that the pole
formed by the feedback resistors and the total capacitance at
the inverting input does not degrade stability. For instance,
the LT1630/LT1631 in a noninverting gain of 2, set with
two 20k resistors, will probably oscillate with 10pF total
input capacitance (5pF input capacitance and 5pF board
capacitance). The amplifier has a 5MHz crossing frequency
and a 52° phase margin at 6dB of gain. The feedback
resistors and the total input capacitance form a pole at
1.6MHz that induces a phase shift of 72° at 5MHz! The
solution is simple: either lower the value of the resistors
or add a feedback capacitor of 10pF or more.
LT1630/LT1631
17
16301fa
Typical applicaTions
Single Supply, 40dB Gain, 350kHz
Instrumentation Amplifier
An instrumentation amplifier with a rail-to-rail output swing,
operating from a 3V supply can be constructed with the
LT1630 as shown in Figure 2. The amplifier has a nominal
gain of 100, which can be adjusted with resistor R5. The
DC output level is set by the difference of the two inputs
multiplied by the gain of 100. Common mode range can
be calculated by the equations shown with Figure 2. For
example, the common mode range is from 0.15V to 2.65V
if the output is set at one half of the 3V supply. The com-
mon mode rejection is greater than 110dB at 100Hz when
trimmed with resistor R1. The amplifier has a bandwidth
of 355kHz as shown in Figure 3.
Tunable Q Notch Filter
A single supply, tunable Q notch filter as shown in Figure 4
is built with LT1630 to maximize the output swing. The
filter has a gain of 2, and the notch frequency (fO) is set
by the values of R and C. The resistors R10 and R11 set
up the DC level at the output. The Q factor can be adjusted
by varying the value of R8. The higher value of R8 will
decrease Q as depicted in Figure 5, because the output
induces less of feedback to amplifier A2. The value of R7
should be equal or greater than R9 to prevent oscillation.
If R8 is a short and R9 is larger than R7, then the positive
feedback from the output will create phase inversion at the
output of amplifier A2, which will lead to oscillation.
–
+
1/2 LT1630
VIN–
VIN+
OUT1
VOUT
1630/31 F02
R1
20k
R2
2k
R4
20k
R5
432Ω
R3
2k
–
+
1/2 LT1630
VS
FREQUENCY (Hz)
VOLTAGE GAIN (dB)
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
–70
100 10k 100k 10M
1630/31 F03
1k 1M
COMMON MODE INPUT
DIFFERENTIAL INPUT
VS = 3V
AV = 100
BW kHz
AR
R
R
R
R R
R
V V
V
OUT I
=
= + + +
=
=
355
4
312
1
3 2
5100
NN IN V
V A
+
( )
– •
–
LOWER LIMIT COMMON MODE INPUT VOLTAGE
VCML OUT
V
A
=
VV
R
RV
+
2
50 1 1 0
1 1
..
.
UPPER LIMIT COMMOON MODE INPUT VOLTAGE
VCMH OUT
VS
V
A
R
RV=
+
2
5–00 15 1 0
1 1
..
.
V
WHERE S
( )
V IS THE SUPPLY CURRRENT
Figure 2. Single Supply, 40dB Gain Instrumentation Amplifier
Figure 3. Frequency Response
–
+
A2
1/2 LT1630
VIN
VOUT
1630/31 F04
5V
5V
R2
1k
R9
1k
R8
5k
R11
10k
R10
10k
R6
1k
R1
500Ω
R5
1k
R7
1k
R
1.62k
R
1.62k
C
1000pF
C
1000pF
–
+A1
1/2 LT1630
C2
4.7µF
C5
4.7µF
C1
2.2µF
f kHz V V R
R R V
fRC A
O O DC
O V
= =
( )( )
+=
= =
98 5 11
11 10 2 5
1
2
( ) .
π22
Figure 4. Tunable Q Notch Filter
FREQUENCY (kHz)
40
20
0
–20
–40
GAIN (VOUT/VIN)(dB)
13630/31 F05
0 20 40 60 140 160 180 20080 100 120
INCREASING R8
DECREASING R8
Figure 5. Frequency Response
LT1630/LT1631
18
16301fa
package DescripTion
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
N8 1002
.065
(1.651)
TYP
.045 – .065
(1.143 – 1.651)
.130 p .005
(3.302 p 0.127)
.020
(0.508)
MIN
.018 p .003
(0.457 p 0.076)
.120
(3.048)
MIN
.008 – .015
(0.203 – 0.381)
.300 – .325
(7.620 – 8.255)
.325 +.035
–.015
+0.889
–0.381
8.255
1 2 34
8 7 6 5
.255 p .015*
(6.477 p 0.381)
.400*
(10.160)
MAX
NOTE:
1. DIMENSIONS ARE INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
.100
(2.54)
BSC
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)s 45o
0o– 8o TYP
.008 – .010
(0.203 – 0.254)
SO8 0303
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
1234
.150 – .157
(3.810 – 3.988)
NOTE 3
8765
.189 – .197
(4.801 – 5.004)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN .160 p.005
RECOMMENDED SOLDER PAD LAYOUT
.045 p.005
.050 BSC
.030 p.005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
1
N
234
.150 – .157
(3.810 – 3.988)
NOTE 3
14 13
.337 – .344
(8.560 – 8.738)
NOTE 3
.228 – .244
(5.791 – 6.197)
12 11 10 9
567
N/2
8
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)s 45o
0o – 8o TYP
.008 – .010
(0.203 – 0.254)
S14 0502
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
.245
MIN
N
1 2 3 N/2
.160 p.005
RECOMMENDED SOLDER PAD LAYOUT
.045 p.005
.050 BSC
.030 p.005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
LT1630/LT1631
19
16301fa
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 2/2010 Changes to Absolute Maximum Ratings
Updated Order Information Section
Added H Grade Part
Added H Grade Electrical Characteristics Tables
2
2
2
6, 10
LT1630/LT1631
20
16301fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2009
LT 0210 REV A • PRINTED IN USA
relaTeD parTs
Typical applicaTion
RF Amplifier Control Biasing and DC Restoration
Taking advantage of the rail-to-rail input and output, and
the large output current capability of the LT1630, the
circuit, shown in Figure 6, provides precise bias currents
for the RF amplifiers and restores DC output level. To
ensure optimum performance of an RF amplifier, its bias
point must be accurate and stable over the operating
temperature range. The op amp A1 combined with Q1,
Q2, R1, R2 and R3 establishes two current sources of
21.5mA to bias RF1 and RF2 amplifiers. The current of
Q1 is determined by the voltage across R2 over R1, which
is replicated in Q2. These current sources are stable and
precise over temperature and have a low dissipated power
due to a low voltage drop between their terminals. The
amplifier A2 is used to restore the DC level at the output.
With a large output current of the LT1630, the output can
be set at 1.5VDC on 5V supply and 50Ω load. This circuit
has a 3dB bandwidth from 2MHz to 2GHz and a power
gain of 25dB.
–
+
A1
1/2 LT1630
VOUT
1630/31 F06
5V
5V
HP-MSA0785
HP-MSA0785
R3
10k
L1
220µH
C5
0.01µF
L2
220µH
Q1
2N3906 Q2
2N3906
C6
0.01µF
R5
50Ω
R1
10Ω
R2
453W
R4
10Ω
C3
1500pF
–
+A2
1/2 LT1630
C4
1500pF
C2
1500pF
C1
0.01µF
VIN
L4
3.9µH
L3
3.9µH
++
+
RF1 RF2
Figure 6. RF Amplifier Control Biasing and DC Restoration
PART NUMBER DESCRIPTON COMMENTS
LT1211/LT1212 Dual/Quad 14MHz, 7V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275µV VOS(MAX),
6µV/°C Max Drift, Max Supply Current 1.8mA per Op Amp
LT1213/LT1214 Dual/Quad 28MHz, 12V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275µV VOS(MAX),
6µV/°C Max Drift, Max Supply Current 3.5mA per Op Amp
LT1215/LT1216 Dual/Quad 23MHz, 50V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 450µV VOS(MAX),
6µV/°C Max Drift, Max Supply Current 6.6mA per Op Amp
LT1498/LT1499 Dual/Quad 10MHz, 6V/µs Rail-to-Rail Input and Output
C-Load™ Op Amps
High DC Accuracy, 475µV VOS(MAX), 4µV/°C Max Drift,
Max Supply Current 2.2mA per Amp
LT1632/LT1633 Dual/Quad 45MHz, 45V/µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 1.35mV VOS(MAX), 70mA Output Current,
Max Supply Current 5.2mA per Amp
