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LT1413 Single Supply, Dual Precision Op Amp
FEATURES
Single Supply Operation: s Input Goes Below Ground s Output Swings to Ground Sinking Current s No Pull-Down Resistors Needed s Phase Reversal Protection At 5V, 0V Low Cost Grade Specifications: s 280V Max Offset Voltage s 380V Max in S8 Package s 0.8nA Max Offset Current s 480A Max Supply Current per Amplifier s 0.5V/C Drift s 1.4 Million Voltage Gain s 950kHz Gain-Bandwidth Product s 0.55V P-P, 0.1Hz to 10Hz Noise
DESCRIPTIO
The LT1413 is a low cost, upgraded version of Linear Technology's industry standard LT1013 dual, single supply op amp. The LT1413 is optimized for single 5V applications, although 15V specifications are also provided for completeness. In the design of the LT1413, particular emphasis has been placed on low cost plastic and SO-8 package performance: 60V offset voltage, 0.1nA offset current, in excess of 10mA output current at 330A supply current and 140dB channel separation are some of the specifications achieved. Other dual, single supply amplifiers are available to complement the LT1413 family: the micropower LT1078's supply current is 10 times lower with a 4.5 fold speed performance degradation compared to the LT1413. Conversely, the LT1211, LT1213 and LT1215 duals have 4 to 14 times higher supply current, but also 13 to 50 times higher speed.
Protected by U.S. Patent 4,775,884.
APPLICATI
s s s s s
S
Single Supply Systems Two and Three Op Amp Instrumentation Amplifiers Active Filters Battery-Powered Systems Strain Gauge and Bridge Amplifiers
TYPICAL APPLICATI
+90V, -3V Common-Mode Range Difference Amplifier (AV = 1)
30 10M 9V 25
Distribution of Input Offset Voltage (In Plastic DIP, N8 Package)
VS = 5V, 0V TA = 25C
-
INPUT
- +
8 1 OUTPUT 20mV TO 8V
PERCENT OF UNITS
10M
2 1M 1M
20 15 10 5
+
10M
1/2 LT1413 3 4
10M OUTPUT OFFSET = 1.5mV (INPUT REFERRED = 125V) INPUT RESISTANCE = 11M BANDWIDTH = 80kHz (THE 0.1nA TYPICAL OFFSET CURRENT PERMITS THE USE OF 1M RESISTORS)
LT1413 * TA03
0 -300 -200 -100 0 100 200 INPUT OFFSET VOLTAGE (V)
U
300
LT1413 * TA01
UO
UO
1
LT1413 ABSOLUTE AXI U RATI GS
Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range ............... - 40C to 85C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
Note: When the input voltage exceeds the maximum ratings, the input current should be limited to 10mA.
Supply Voltage ..................................................... 22V Differential Input Voltage ...................................... 30V Input Voltage .................................................................. Equal to Positive Supply Voltage 5V Below Negative Supply Voltage
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V
-
ORDER PART NUMBER
8 V+ OUT B -IN B +IN B 7
A B
6 5
LT1413ACN8 LT1413CN8
4
N8 PACKAGE 8-LEAD PLASTIC DIP
TJMAX = 100C, JA = 130C/ W
ELECTRICAL CHARACTERISTICS
SYMBOL VOS VOS Time IOS IB en PARAMETER Input Offset Voltage Long-Term Input Offset Voltage Stability Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Input Noise Current Density Input Resistance Differential Mode Common Mode Input Voltage Range CMRR PSRR AVOL Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain LT1413N8 LT1413S8
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C, unless otherwise noted.
MIN LT1413ACN8 TYP MAX 50 0.4 0.1 9 0.55 24 23 2.8 0.07 0.02 300 3.65 0 90 102 400 300 500 3 3.8 - 0.3 101 118 1400 1000 0.7 15 1.1 38 30 150 LT1413CN8/S8 MIN TYP MAX 60 80 0.5 0.1 9 0.55 24 23 2.8 0.07 0.02 250 3.65 0 88 100 350 250 500 3 3.8 - 0.3 101 118 1400 1000 280 380 UNITS V V V/Mo nA nA VP-P nV/Hz nV/Hz pAP-P pA/Hz pA/Hz M G V V dB dB V/mV V/mV
CONDITIONS (Note 1)
in
0.1Hz to 10Hz (Note 2) fO = 10Hz (Note 2) fO = 1000Hz (Note 2) 0.1Hz to 10Hz fO = 10Hz fO = 1000Hz (Note 3)
VCM = 0V to 3.65V VS = 3.2V to 12V VO = 0.05V to 4V, No Load VO = 0.05V to 3.5V, RL = 2k
2
U
U
W
WW
U
W
TOP VIEW +IN A 1 V- 2 +IN B 3 B -IN B 4 5 OUT B S8 PACKAGE 8-LEAD PLASTIC SOIC NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT FOLLOWS THE INDUSTRY STANDARD LT1013DS8 SO PACKAGE CONFIGURATION.
TJMAX = 105C, JA = 200C/ W
8 A 7 6
-IN A OUT A V+
ORDER PART NUMBER LT1413S8
S8 PART MARKING 1413
0.8 18
LT1413
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER Maximum Output Voltage Swing CONDITIONS
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C, unless otherwise noted.
MIN LT1413ACN8 TYP MAX 15 5 220 4.4 4.0 0.3 950 330 140 2.85 25 10 350 4.1 3.4 0.2 600 450 123 3.0 LT1413CN8/S8 MIN TYP MAX 15 5 220 4.4 4.0 0.3 950 330 140 2.85 25 10 350 UNITS mV mV mV V V V/s kHz A dB V
SR GBW IS
Slew Rate Gain-Bandwidth Product Supply Current per Amplifier Channel Separation Minimum Supply Voltage
Output Low, No Load Output Low, 600 to GND Output Low, ISINK = 1mA Output High, No Load Output High, 600 to GND AV = 1 fO 100kHz (Note 4) VIN = 3V, RL = 2k (Note 5) (Note 6)
4.1 3.4 0.2 600 125
480 3.0
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0C TA 70C, unless otherwise noted.
SYMBOL VOS VOS /T IOS IB CMRR PSRR AVOL PARAMETER Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing CONDITIONS (Note 1) LT1413N8 LT1413S8 (Note 5)
q q q q q
MIN
LT1413ACN8 TYP MAX 65 0.3 0.1 10 100 117 1100 800 18 270 4.3 3.9 350 240 2.0 1.0 20
LT1413CN8/S8 MIN TYP MAX 80 100 0.4 0.1 10 100 117 1100 800 18 270 4.3 3.9 350 390 490 2.5 1.2 23
UNITS V V V/C nA nA dB dB V/mV V/mV mV mV V V A
VCM = 0V to 3.6V VS = 3.45V to 12V VO = 0.07V to 3.9V, No Load VO = 0.07V to 3.2V, RL = 2k Output Low, No Load Output Low, ISINK = 1mA Output High, No Load Output High, 600 to GND
q q q q q q q q q
88 100 300 200
85 97 300 200 32 430 4.0 3.2 500
32 430
4.0 3.3
IS
Supply Current per Amplifier
530
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, - 40C TA 85C (Note 7)
SYMBOL VOS VOS /T IOS IB CMRR PSRR AVOL PARAMETER Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing CONDITIONS (Note 1) LT1413N8 LT1413S8 MIN
q q q q q
LT1413ACN8 TYP MAX 70 300 0.3 0.2 11 99 116 1000 700 20 300 4.2 3.8 360 2.2 1.4 25
VCM = 0V to 3.4V VS = 3.9V to 12V VO = 0.08V to 3.8V, No Load VO = 0.08V to 3.0V, RL = 2k Output Low, No Load Output Low, ISINK = 1mA Output High, No Load Output High, 600 to GND
q q q q q q q q q
85 98 220 150
38 480
3.9 3.1
IS
Supply Current per Amplifier
550
LT1413CN8/S8 MIN TYP MAX 85 470 110 570 0.4 2.8 0.2 1.7 11 30 82 99 94 116 220 1000 150 700 20 38 300 480 3.9 4.2 3.0 3.8 360 580
UNITS V V V/C nA nA dB dB V/mV V/mV mV mV V V A
3
LT1413
ELECTRICAL CHARACTERISTICS VS = 15V, TA = 25C, unless otherwise noted.
SYMBOL VOS IOS IB PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Slew Rate Supply Current per Amplifier VCM = 13.5V, - 15V VS = 2V to 18V VO = 10V, RL = 2k RL = 2k CONDITIONS (Note 1) LT1413N8 LT1413S8 MIN LT1413ACN8 TYP MAX 75 0.1 8 13.5 13.8 - 15.0 - 15.3 100 117 103 120 1500 5000 13 14 0.2 0.4 350 280 0.7 15 LT1413CN8/S8 MIN TYP MAX 90 110 0.1 8 13.5 13.8 - 15.0 - 15.3 97 114 100 117 1200 4000 12.5 14 0.2 0.4 350 480 580 0.8 18 UNITS V V nA nA V V dB dB V/mV V V/s A
CMRR PSRR AVOL VOUT SR IS
500
550
VS = 15V, 0C TA 70C, unless otherwise noted.
SYMBOL VOS VOS /T IOS IB AVOL CMRR PSRR IS PARAMETER Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Large-Signal Voltage Gain Common-Mode Rejection Ratio Power Supply Rejection Ratio Maximum Output Voltage Swing Supply Current per Amplifier CONDITIONS (Note 1) LT1413N8 LT1413S8 (Note 5)
q q q q q
MIN
LT1413ACN8 TYP MAX 95 0.4 0.1 9 4000 116 119 13.9 360 390 2.5 1.0 20
LT1413CN8/S8 MIN TYP MAX 110 130 0.5 0.1 9 3000 113 116 13.9 360 620 720 3.0 1.2 23
UNITS V V V/C nA nA V/mV dB dB V A
VO = 10V, RL = 2k VCM = 13V, - 15V VS = 2V to 18V RL = 2k
q q q q q
1000 98 101 12.5
700 94 97 12.0 550
600
VS = 15V, - 40C TA 85C (Note 7)
SYMBOL VOS VOS /T IOS IB AVOL CMRR PSRR IS PARAMETER Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Large-Signal Voltage Gain Common-Mode Rejection Ratio Power Supply Rejection Ratio Maximum Output Voltage Swing Supply Current per Amplifier CONDITIONS (Note 1) LT1413N8 LT1413S8
q q q q q
MIN
LT1413ACN8 TYP MAX 100 0.4 0.2 10 3000 115 118 13.8 370 460 2.8 1.4 25
LT1413CN8/S8 MIN TYP MAX 120 140 0.5 0.2 10 2400 112 115 13.8 370 700 800 3.3 1.7 30
UNITS V V V/C nA nA V/mV dB dB V A
VO = 10V, RL = 2k VCM = 13V, - 15V VS 2V to 18V RL = 2k
q q q q q
800 97 100 12.2
500 92 95 11.8 580
630
The q denotes specifications which apply over the full operating temperature range. Note 1: Typical parameters are defined as the 60% yield of parameter distributions of individual amplifiers; i.e., out of 100 LT1413s typically 120 op amps will be better than the indicated specification. Note 2: This parameter is tested on a sample basis only. All noise parameters are tested with VS = 2.5V, VO = 0V. Note 3: This parameter is guaranteed by design and is not tested.
Note 4: Gain-Bandwidth Product is not tested. It is inferred from the slew rate measurement. Note 5: This parameter is not 100% tested. Note 6: At the minimum supply voltage, the offset voltage changes less than 200V compared to its value at 5V, 0V. Note 7: The LT1413 is not tested and is not quality-assurance sampled at - 40C and at 85C. These specifications are guaranteed by design, correlation and/or inference from 0C, 25C and/or 70C tests.
4
LT1413
TYPICAL PERFOR A CE CHARACTERISTICS
Distribution of Input Offset Voltage (In S8 Package)
30
SUPPLY CURRENT PER AMPLIFIER (A)
25
VS = 5V, 0V TA = 25C
20 15 10 5 0 -400 -300 -200 -100 0 100 200 300 400 INPUT OFFSET VOLTAGE (V)
LT1413 * TA02
SATURATION VOLTAGE (V)
PERCENT OF UNITS
Input Offset Current vs Temperature
250
-11
COMMON-MODE VOLTAGE (V)
INPUT OFFSET CURRENT (pA)
VS = 5V, 0V VCM = 0.1V 150 VS = 15V
INPUT BIAS CURRENT (nA)
200
100
50
0 -40
-20
40 0 20 60 TEMPERATURE (C)
0.1Hz to 10Hz Noise
1000
VOLTAGE NOISE DENSITY (nV/Hz) CURRENT NOISE DENSITY (fA /Hz)
CHANGE IN OFFSET VOLTAGE (V)
TA = 25C VS = 2V TO 18V
NOISE VOLTAGE (200nV/DIV)
0
2
4 6 TIME (SECONDS)
UW
80
LT1413 * TA06
Supply Current vs Temperature
10
400
Output Saturation vs Sink Current vs Temperature
V + = 5V TO 30V V - = 0V ISINK = 10mA 1 ISINK = 5mA ISINK = 1mA 0.1 ISINK = 100A ISINK = 10A ISINK = 0 -25 0 25 50 TEMPERATURE (C) 75 100
350
VS = 15V
VS = 5V, 0V 300
- 50
-25
0 50 25 TEMPERATURE (C)
75
100
0.01 -50
LT1413 * TA04
LT1413 * TA05
Input Bias Current vs Temperature
15 10 5 0 -5 -10 -15
Input Bias Current vs Common-Mode Voltage
5 TA = 25C VS = 15V 4 VS = 5V, 0V 3 2 1 0 -1 - 4 - 6 - 8 -10 -12 -14 -16 INPUT BIAS CURRENT (nA)
LT1413 * TA08
COMMON-MODE VOLTAGE (V)
-10
VS = 5V, 0V VCM = 0.1V
-9 VS = 15V -8
-7
100
- 40
-20
40 0 20 60 TEMPERATURE (C)
80
100
0
-2
LT1413 * TA07
Noise Spectrum
200 TA = 25C VS = 2V TO 18V 300
Minimum Supply Voltage
NONFUNCTIONAL TA = - 40C 100 TA = 0C TA = 25C TA = 85C V - = 0V
100 CURRENT NOISE VOLTAGE NOISE
30
0
1/f CORNER 2Hz 10 1 10 100 FREQUENCY (Hz) 1k
LT1413 * TA10
8
10
LT1413 * TA09
2
3 4 POSITIVE SUPPLY VOLTAGE (V)
5
LT1413 * TA11
5
LT1413
TYPICAL PERFOR A CE CHARACTERISTICS
Voltage Gain vs Frequency
140 120 100 TA = 25C CL = 100pF
120 140 160
80 60 40 20 0 - 20 0.01 0.1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
LT1413 * TA12
15V 10 GAIN 0 15V 5V, 0V
CHANNEL SEPARATION (dB)
VOLTAGE GAIN (dB)
VOLTAGE GAIN (dB)
VS = 15V VS = 5V, 0V
Common-Mode Rejection Ratio vs Frequency
120
COMMON-MODE REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
TA = 25C 100 VS = 15V 80 60 40 20 0 10 100 1k 10k FREQUENCY (Hz) 100k 1M VS = 5V, 0V
80 60 40 20 0 0.1
20mV/DIV
Small Signal Transient Response, VS = 5V, 0V
50mV/DIV
2V
0V
0V
AV = +1 20s/DIV INPUT = 20mV TO 220mV PULSE
LT1413 * TA18
AV = +1 NO LOAD INPUT = 0V TO 4V PULSE
10s/DIV
LT1413 * TA19
5V/DIV
6
UW
LT1413 * TA15
Gain, Phase vs Frequency
80 20 PHASE TA = 25C VCM = 0.1V CL = 100pF 100
140 160
Channel Separation vs Frequency
TA = 25C VS = 5V, 0V VIN = 3Vp-p RL = 2k LIMITED BY THERMAL INTERACTION RS = 1k RS = 100
PHASE SHIFT (DEGREES)
120
5V, 0V
180 200
100
80
-10
60
LIMITED BY PIN TO PIN CAPACITANCE 10 100 1k 10k FREQUENCY (Hz) 100k 1M
0.1
0.3
3 1 FREQUENCY (MHz)
10
LT1413 * TA13
LT1413 * TA14
Power Supply Rejection Ratio vs Frequency
120 VS = 5V, 0V 100 NEGATIVE SUPPLY 15V POSITIVE SUPPLY 15V TA = 25C
Small Signal Transient Response, VS = 15V
AV = +1
2s/DIV
LT1413 * TA17
1
10
100 1k 10k 100k FREQUENCY (Hz)
1M
LT1413 * TA16
Large Signal Transient Response, VS = 5V, 0V
Large Signal Transient Response, VS = 15V
4V
AV = +1
50s/DIV
LT1413 * TA20
LT1413 APPLICATIONS INFORMATION
Single Supply Operation The LT1413 is fully specified for single supply operation, i.e., when the negative supply is 0V. Input common-mode range includes ground; the output swings within a few millivolts of ground. If the input is more than a few hundred millivolts below ground, two distinct problems can occur on previous single supply designs, such as the LM124, LM158, OP-21 and OP-221. a) When the input is more than a diode drop below ground, unlimited current will flow from the substrate (V- terminal) to the input. This can destroy the unit. On the LT1413, the 400 resistors, in series with the input (see Schematic Diagram), protect the devices even when the input is 5V below ground. b) When the input is more than 400mV below ground (at 25C), the input stage saturates (transistors Q3 and Q4) and phase reversal occurs at the output. This can cause lock-up in servo systems. Due to a unique phase reversal protection circuitry (Q21, Q22, Q27, Q28), the LT1413 outputs do not reverse, as illustrated below, even when the inputs are at -1.5V. Keep the output of the other amplifier out of negative saturation for the phase reversal protection to function properly. Since the output of the LT1413 cannot go exactly to ground, but can only approach ground to within a few millivolts, care should be exercised to ensure that the output is not saturated. For example, a 1mV input signal will cause the amplifier to set up in its linear region in the gain 100 configuration shown below, but is not enough to make the amplifier function properly in the voltage-follower mode.
Gain 100 Amplifier
5V R 99R
Voltage Follower with Input Exceeding the Negative Common-Mode Range
4V 4V 4V
2V
2V
0V 0V 6VP-P INPUT, -1.5V TO 4.5V
LT1413 * TA21
LM324, LM358, OP-221 EXHIBIT OUTPUT PHASE REVERSAL
LT1413 * TA22
Comparator Rise Response Time 10mV, 5mV, 2mV Overdrives
4 OUTPUT (V) OUTPUT (V) 4
2
INPUT (mV)
0
INPUT (mV)
0
-100 VS = 5V, 0V 50s/DIV
LT1413 * TA24
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
W
U
U
Voltage Follower
5V
-
100mV
-
1mV
1mV
+
+
OUTPUT SATURATED 15mV
LT1413 * 27
Figure 1.
Comparator Applications The single supply operation of the LT1413 lends itself to its use as a precision comparator with TTL compatible output; the response time is shown below.
2V
0V
LT1413 NO PHASE REVERSAL
LT1413 * TA23
Comparator Fall Response Time to 10mV, 5mV, 2mV Overdrives
2
0 100
0 VS = 5V, 0V 50s/DIV
LT1413 * TA25
7
LT1413 SIMPLIFIED SCHEMATIC
1/2 LT1413
V+ 1k 3.5A 3.5A 11A 10A 11A 80A Q32 Q30 Q3 Q4 3.9k Q5 Q25 Q33 21pF 2.5pF 2.4k Q26 18 16k Q16 OUTPUT Q2 400 IN+ Q18 Q22 Q12 Q29 Q11 Q8 Q9 V- 75pF Q7 5k 5k 10pF 30 15A 18A 15A
LT1413 * TA26
Q1 400 IN - Q21
Q27
Q28 4pF Q19 2k 100pF Q24 48k Q31 Q34
PACKAGE DESCRIPTION
0.300 - 0.320 (7.620 - 8.128)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) MIN 0.020 (0.508) MIN 1 2 3 4
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
0.045 0.015 (1.143 0.381) 0.100 0.010 (2.540 0.254)
0.010 - 0.020 x 45 (0.254 - 0.508)
0.053 - 0.069 (1.346 - 1.752)
0.008 - 0.010 (0.203 - 0.254) 0.016 - 0.050 0.406 - 1.270
0- 8 TYP
0.014 - 0.019 (0.355 - 0.483)
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
U
W
W
800
Q36 Q35
Q6 J1 V-
Q17
600
Q10
Q14
Q15
600
600
N8 Package, 8-Lead Plastic DIP
0.045 - 0.065 (1.143 - 1.651) 0.130 0.005 (3.302 0.127) 8 0.400 (10.160) MAX 7 6 5
0.250 0.010 (6.350 0.254)
0.018 0.003 (0.457 0.076)
N8 0392
S8 Package, 8-Lead Plastic SOIC
8 0.004 - 0.010 (0.101 - 0.254) 0.228 - 0.244 (5.791 - 6.197) 0.050 (1.270) BSC 1
0.189 - 0.197 (4.801 - 5.004) 7 6 5
0.150 - 0.157 (3.810 - 3.988)
2
3
4
SO8 0392
BA/GP 1193 10K REV 0 * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1993

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