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LT 2178/LT 2179 17A Max, Dual and Quad, Single Supply, Precision Op Amps
FEATURES
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DESCRIPTION
The LT (R)2178 is a micropower dual op amp in a surface mount standard 8-pin configuration, the LT2179 is a micropower quad op amp offered in a surface mount 14-pin package. Both devices are optimized for single supply operation at 5V. Specifications are also provided at 15V supply. The extremely low supply current is combined with true precision specifications: offset voltage is 30V and offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pAP-P current noise and picoampere offset current permit the use the megohm level source resistors without introducing serious errors. Voltage noise, at 0.9VP-P, is remarkably low considering the low supply current. The LT2178/LT2179 can be operated from a single supply (as low as one lithium-cell or two NiCd batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current. No power consuming pull down resistors are needed. For surface mount applications where three times higher supply current is acceptable, the micropower LT1077 single, LT2078 dual and LT2079 quad are recommended. The LT1077/LT2078/LT2079 have significantly higher bandwidth, slew rate, lower voltage noise and better output drive capability. For applications requiring DIP packages refer to the LT1178/LT1179.
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SO Package with Standard Pinout Supply Current per Amplifier: 17A Max Offset Voltage: 70V Max Offset Current: 250pA Max Input Bias Current: 5nA Max Voltage Noise: 0.9VP-P, 0.1Hz to 10Hz Current Noise: 1.5pAP-P, 0.1Hz to 10Hz Offset Voltage Drift: 0.5V/C Gain Bandwidth Product: 85kHz Slew Rate: 0.04V/s Single Supply Operation Input Voltage Range Includes Ground Output Swings to Ground while Sinking Current No Pull-Down Resistors Needed Output Sources and Sinks 5mA Load Current
APPLICATIONS
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Battery- or Solar-Powered Systems Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry Micropower Sample-and-Hold Thermocouple Amplifier Micropower Filters
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Self-Buffered, Dual Output, Micropower Reference
2 SUPPLY CURRENT PER AMPLIFIER (A) TOTAL BATTERY CURRENT = 28 A OUTPUT ACCURACY = 0.4% MAX TEMPERATURE COEFFICIENT = 20ppm/ C LOAD REGULATION = 25ppm/mA, I L 5mA, V+ 5V LINE REGULATION = 10ppm/V * 0.1% FILM RESISTORS
1/2 LT2178
1
250k 6 2M 0.1F LT1004-1.2 1M*
1M*
LT2178/79 * TA01
-
+
+
3
1.2365V OUTPUT 4V TO 9V
4 5 8 7 2.470V OUTPUT
1/2 LT2178 0.1F
U
U
U
Supply Current vs Temperature
20
-
18 VS = 15V 16
14
VS = 5V, 0V
12
VS = 1.5V
10 -50
-25
25 50 0 TEMPERATURE (C)
75
100
LT2178/79 * TPC02
1
LT2178/LT 2179
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................... 22V Differential Input Voltage ....................................... 30V Input Voltage ............... Equal to Positive Supply Voltage ............ 5V Below Negative Supply Voltage Output Short-Circuit Duration .......................... Indefinite Specified Temperature Range Commercial ............................................. 0C to 70C Industrial ............................................ - 40C to 85C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V- 4
- +
8 A
-
V+ OUT B -IN B +IN B
7 B+ 6 5
-IN B 6 OUT B 7
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 190C/ W
PART MARKING 2178A 2178 2178AI 2178I
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 150C, JA = 150C/ W
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOS VOS Time IOS IB en Input Offset Voltage Long Term Input Offset Voltage Stability Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density in Input Noise Current Input Noise Current Density Input Resistance Differential Mode Common Mode Input Voltage Range CMRR PSRR Common Mode Rejection Ratio VCM = 0V to 3.5V Power Supply Rejection Ratio VS = 2.2V to 12V LT2178 LT2179
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C, unless otherwise noted.
LT2178AC/LT2178AI LT2179AC/LT2179AI MIN TYP MAX 30 35 0.5 0.05 3 0.25 5 2.0 75 65 2.5 0.07 70 100 LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 40 40 0.6 0.05 3 0.9 50 49 1.5 0.03 0.01 0.6 3.5 0 90 92 2.0 12 3.9 - 0.3 102 104 0.35 6 120 150
CONDITIONS (NOTE 1)
0.1Hz to 10Hz (Note 2) fO = 10Hz (Note 2) fO = 1000Hz (Note 2) 0.1Hz to 10Hz (Note 2) fO = 10Hz (Note 2) fO = 1000Hz (Note 3) 0.8 3.5 0 93 94
0.9 50 49 1.5 0.03 0.01 2.0 12 3.9 - 0.3 103 104
2
-
B
C
+
-
+
LT2178ACS8 LT2178AIS8 LT2178CS8 LT2178IS8
U
U
W
WW U
W
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V+ 4 +IN B 5
- + -
14 OUT D A D+ 13 -IN D 12 +IN D 11 V - 10 +IN C 9 8 -IN C OUT C
ORDER PART NUMBER LT2179ACS LT2179AIS LT2179CS LT2179IS
UNITS V V V/Mo nA nA VP-P nVHz nVHz pAP-P pAHz pAHz G G V V dB dB
LT 2178/LT 2179
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER AVOL Large-Signal Voltage Gain Maximum Output Voltage Swing
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C, unless otherwise noted.
LT2178AC/LT2178AI LT2179AC/LT2179AI MIN TYP MAX 140 80 700 200 6.5 0.2 120 4.2 3.5 0.013 4.4 3.8 0.025 60 13 12 110 2.0 2.2 18 17 9 0.6 160 4.2 3.5 0.013 LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 110 70 700 200 6.5 0.2 120 4.4 3.8 0.025 60 14 13 110 2.0 2.2 21 20 9 0.6 160
CONDITIONS (NOTE 1) VO = 0.03V to 4V, No Load (Note 3) VO = 0.03V to 3.5V, RL = 50k Output Low, No Load Output Low, 2k to GND Output Low, ISINK = 100A Output High, No Load Output High, 2k to GND
UNITS V/mV V/mV mV mV mV V V V/s kHz A A dB V
SR GBW IS
Slew Rate Gain Bandwidth Product Supply Current per Amplifier Channel Separation Minimum Supply Voltage
AV = 1, CL = 10pF (Note 3) fO 5kHz VS = 1.5V, VO = 0V VIN = 3V, RL = 10k (Note 4)
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, - 40C TA 85C for I grades, unless otherwise noted. (Note 6)
SYMBOL PARAMETER VOS VOS T IOS IB CMRR PSRR AVOL Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Common Mode Rejection Ratio VCM = 0.05V to 3.2V Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing VS = 3V to 12V VO = 0.05V to 4V, No Load (Note 3) VO = 0.05V to 3.5V, RL = 50k Output Low, No Load Output Low, ISINK = 100A Output High, No Load Output High, 2k to GND IS Supply Current per Amplifier CONDITIONS LT2178 LT2179 LT2178 (Note 5) LT2179
q q q q q q q q q q q q q q
LT2178AI/LT2179AI MIN TYP MAX 70 80 0.4 0.5 0.07 3 86 88 75 40 100 100 350 130 9 160 3.9 3.0 4.2 3.7 15 24 13 220 270 300 1.8 3.0 0.70 7
LT2178I/LT2179I MIN TYP MAX 95 100 0.5 0.6 0.1 4 84 86 50 30 98 100 350 130 9 160 3.9 3.0 4.2 3.7 15 27 13 220 370 400 2.5 3.5 1.0 8
UNITS V V V/C V/C nA nA dB dB V/mV V/mV mV mV V V A
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0C TA 70C, unless otherwise noted. (Note 7)
SYMBOL PARAMETER VOS VOS T IOS IB CMRR PSRR Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Common Mode Rejection Ratio VCM = 0V to 3.4V Power Supply Rejection Ratio VS = 2.5V to 12V CONDITIONS LT2178 LT2179 LT2178 (Note 5) LT2179
q q q q q q q
LT2178AC/LT2179AC MIN TYP MAX 50 60 0.4 0.5 0.06 3 90 90 101 102 170 200 1.8 3.0 0.35 6
LT2178C/LT2179C MIN TYP MAX 65 70 0.5 0.6 0.06 3 86 88 100 102 250 290 2.5 3.5 0.50 7
UNITS V V V/C V/C nA nA dB dB
3
LT2178/LT 2179
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER AVOL Large-Signal Voltage Gain Maximum Output Voltage Swing CONDITIONS
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0C TA 70C, unless otherwise noted.
LT2178AC/LT2179AC MIN TYP MAX
q q q q q q q
LT2178C/LT2179C MIN TYP MAX 80 45 500 160 8 140 4.1 3.3 4.3 3.8 15 24 11 190
UNITS V/mV V/mV mV mV V V A
VO = 0.05V to 4V, No Load (Note 3) VO = 0.05V to 3.5V, RL = 50k Output Low, No Load Output Low, ISINK = 100A Output High, No Load Output High, 2k to GND
150 55
500 160 8 140 11 190
4.1 3.3
4.3 3.8 14 21
IS
Supply Current per Amplifier
VS = 15V, TA = 25C, unless otherwise noted.
LT2178AC/LT2178AI LT2179AC/LT2179AI MIN TYP MAX 70 300 80 350 0.05 3 13.5 -15.0 96 96 300 600 13.0 11.0 0.02 VS = 5V, 0V to 18V VO = 10V, RL = 50k VO = 10V, No Load RL = 50k RL = 2k AV = 1 fO 5kHz 13.9 -15.3 106 112 1200 2500 14.2 12.7 0.04 85 16 21 0.25 5 13.5 -15.0 93 94 250 400 13.0 11.0 0.02 LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 90 400 100 450 0.05 3 13.9 -15.3 106 112 1000 2500 14.2 12.7 0.04 85 17 25 0.35 6
SYMBOL PARAMETER VOS Input Offset Voltage IOS IB Input Offset Current Input Bias Current Input Voltage Range CMRR PSRR AVOL VOUT SR GBW IS
CONDITIONS LT2178 LT2179
UNITS V V nA nA V V dB dB V/mV V/mV V V V/s kHz A
Common Mode Rejection Ratio VCM = 13.5V to -15V Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Slew Rate Gain Bandwidth Product Supply Current per Amplifier
VS = 15V, - 40C TA 85C for I grades, unless otherwise noted.
SYMBOL PARAMETER VOS VOS T IOS IB AVOL CMRR PSRR Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Large-Signal Voltage Gain VO = 10V, RL = 50k VS = 0V, 5V to 18V CONDITIONS LT2178 LT2179 LT2178 (Note 5) LT2179
q q q q q q q q q q
LT2178AI/LT2179AI MIN TYP MAX 100 100 0.6 0.7 0.07 3 150 90 92 11.0 500 105 110 13.5 18 28 650 650 1.8 3.0 0.70 7
LT2178I/LT2179I MIN TYP MAX 130 130 0.7 0.9 0.1 4 100 88 88 11.0 500 103 109 13.5 19 30 740 740 2.5 4.0 1.0 8
UNITS V V V/C V/C nA nA V/mV dB dB V A
Common Mode Rejection Ratio VCM = 13V, -14.9V Power Supply Rejection Ratio Maximum Output Voltage Swing RL = 5k
IS
Supply Current per Amplifier
4
LT 2178/LT 2179
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOS VOS T IOS IB AVOL CMRR PSRR 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 IS Supply Current per Amplifier VO = 10V, RL = 50k VCM = 13V, -15V VS = 5V, 0V to 18V RL = 5k CONDITIONS LT2178 LT2179 LT2178 (Note 5) LT2179
VS = 15V, 0C TA 70C, unless otherwise noted.
LT2178AC/LT2179AC MIN TYP MAX
q q q
LT2178C/LT2179C MIN TYP MAX 130 150 0.7 0.9 0.06 3 150 91 91 11.0 750 104 110 13.6 18 28 660 750 2.5 4.0 0.35 7
UNITS V V V/C V/C nA nA V/mV dB dB V A
100 120 0.6 0.7 0.06 3 200 94 93 11.0 800 104 110 13.6 17
480 550 1.8 3.0 0.35 6
q q q q q q q
24
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 LT2179s (or 100 LT2178s) typically 240 op amps (or 120) 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: Power supply rejection ratio is measured at the minimum supply voltage. The op amps actually work at 1.7V supply but with a typical offset skew of -300V. Note 5: This parameter is not 100% tested. Note 6: During testing at -40C, the 5V power supply turn-on time is less than 0.5s. Note 7: The LT2178C/LT2179C are designed, characterized and expected to meet the industrial temperature limits, but are not tested at - 40C and 85C. I-grade parts are guaranteed.
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Input Offset Voltage
800 VS = 5V, 0V TA = 25C 2500 OP AMPS TESTED 100
INPUT OFFSET CURRENT (pA)
OFFSET VOLTAGE SHIFT (V)
NUMBER OF OP AMPS
600
400
-300 NONFUCTIONAL -400
INPUT BIAS CURRENT (nA)
200
0 -150 -100
100 -50 0 50 OFFSET VOLTAGE (V)
UW
LT2178/79 * TPC01
Minimum Supply Voltage
100 V - = 0V 0 -100 85C -200 25C - 40C -2.5 -3.0 -3.5 75 50 25
Input Bias and Offset Currents vs Temperature
VS = 5V, 0V IOS
IB
-500 150
0
2 3 1 POSITIVE SUPPLY VOLTAGE (V)
LT2178/79 * TPC02
-4.0 -50
-25
50 25 0 TEMPERATURE (C)
75
100
LT2178/79 * TPC03
5
LT2178/LT 2179 TYPICAL PERFORMANCE CHARACTERISTICS
Output Saturation vs Temperature vs Sink Current
1000 ISINK = 1mA
SATURATION VOLTAGE (mV)
VS = 5V, 0V
SHORT CIRCUIT CURRENT (mA) SINKING SOURCING
100
VS = 5V, 0V 0
VS = 2.5V
NOISE VOLTAGE (0.4V/DIV)
ISINK = 100A
ISINK = 1A 10 NO LOAD 1 10k TO GROUND 2k TO GROUND 0.1 -50 -25 0 25 50 TEMPERATURE (C) 75 100
0.01Hz to 10Hz Noise
TA = 25C, VS = 2.5V 1000
VOLTAGE NOISE DENSITY (nVHz) CURRENT NOISE DENSITY (fAHz)
NOISE VOLTAGE (0.4V/DIV)
CURRENT NOISE
VOLTAGE GAIN (dB)
CHANNEL A
CHANNEL B 0 20 40 60 80 TIME (SECONDS) 100 120
Gain, Phase vs Frequency
30 PHASE 15V TA = 25C NO LOAD 80 100
VOLTAGE GAIN (V/V)
20
VOLTAGE GAIN (dB)
PHASE 5V, 0V, 10
140 160 180
OVERSHOOT (%)
0
GAIN 5V, 0V GAIN 15V 100k FREQUENCY (Hz)
-10 10k
6
UW
LT2178/79 * TPC04
Short-Circuit Current
20 VS = 15V 10
0.1Hz to 10Hz Noise
TA = 25C, VS = 2.5V
CHANNEL A
VS = 2.5V -10 VS = 15V
-20
CHANNEL B
-30 0 2 1 TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
LT2178/79 * TPC05
0
2
4 6 8 TIME (SECONDS)
10
12
LTC2178/79 * TPC06
Noise Spectrum
140
TA = 25C VS = 2.5V 300
Voltage Gain vs Frequency
TA = 25C 120 100 80 60 40 20 0 VS = 5V, 0V VS = 15V
100 VOLTAGE NOISE 30 1/f CORNER 0.5Hz
10 0.1
1
10 100 FREQUENCY (Hz)
1000
-20 0.001 0.01 0.1
1 10 100 1k 10k 100k 1M FREQUENCY (Hz)
LT2178/79 * TPC09
LTC2178/79 * TPC07
LT2178/79 * TPC08
Voltage Gain vs Load Resistance
10M VS = 15V, TA = 25C 120 100 80 60
Capacitive Load Handling
VS = 5V, 0V
120
PHASE SHIFT (DEG)
1M
100k
VS = 5V, 0V, TA = 25C VS = 5V, 0V, TA = 85C
AV = 1 40 20 0 AV = 5
200 220 240 1M
LT2178/79 * TPC10
AV = 10 10000
LT2078/79 * TPC12
10k 10k
100k 1M LOAD RESISTANCE TO GROUND ()
10M
10
100 1000 CAPACITIVE LOAD (pF)
LT2178/79 * TPC11
LT 2178/LT 2179 TYPICAL PERFORMANCE CHARACTERISTICS
Large-Signal Transient Response VS = 15V Large-Signal Transient Response VS = 5V, 0V Small-Signal Transient Response VS = 2.5V
AV = 1 CL = 12pF
500s/DIV
LT2178/79 * TPC13
AV = 1 100s/DIV CL = 12pF INPUT PULSE = 0V TO 3.8V
20mV/DIV AV = 1 CL = 12pF
LT2178/79 * TPC14
5V/DIV
1V/DIV
Small-Signal Transient Response VS = 15V
COMMON MODE REJECTION RATIO (dB)
20mV/DIV
20mV/DIV
AV = 1 CL = 12pF
20s/DIV
LT2178/79 * TPC16
Power Supply Rejection Ratio vs Frequency
120
100
OUTPUT IMPEDANCE ()
80
PSRR (dB)
60 40 20 0 0.1 1
NEGATIVE SUPPLY
TA = 25C VS = 2.5V + 1VP-P SINE WAVE 10k 10 100 1k OPERATING FREQUENCY (Hz) 100k
UW
20s/DIV
LT2178/79 * TPC15
Small-Signal Transient Response VS = 5V, 0V
120 100 80
Common Mode Rejection Ratio vs Frequency
TA = 25C
VS = 5V, 0V 60 40 20 0 1 10 100 1k FREQUENCY (Hz)
VS = 15V
AV = 1 20s/DIV CL = 12pF INPUT PULSE = 50mV TO 150mV
LT2178/79 * TPC17
10k
100k
LT2178/79 * TPC18
Closed Loop Output Impedance
10k TA = 25C VS = 5V, 0V IL = 0
POSITIVE SUPPLY
1k ACL = 100 100 ACL = 1 10 ACL = 10
1 10 100 1k 10k FREQUENCY (Hz) 100k
LT2178/79 * TPC19
LT2178/79 * TPC20
7
LT2178/LT 2179
SI PLIFIED SCHEMATIC
1/2 LT2178 1/4 LT2179
V+
10k
10k
Q5
Q6
Q3 Q4 Q24
Q12 4 Q11 1
IN -
600
Q1 Q21 Q2 Q22 Q28 V+ Q39 Q9 C2 175pF Q7 Q8 Q10 Q17 Q20 2A Q18 C3 40pF Q19
IN +
600
6.2k
8
W
2.2k Q16
W
5.6k
1.3k
6.4k Q54 1 1
33k Q53 2 Q47
11.5k
12.5k
Q14
Q15
Q32
Q52 Q46
Q29
Q37 Q30 1 3 Q25 3k Q35 Q26 C4 4pF 2.9k 30 OUT Q44 V
+
V- Q40 Q41
8.6k
C1 50pF
Q27
C5 2.5pF 150k Q31 Q36 J1 Q33 Q50 Q23 V+ Q45 Q34 6.2k 3k 10k Q38 30 2A 5.35k Q51 Q55 Q43 700k V-
LT2178/79 * SIMPLIFIED SCHEM
Q48 Q42 Q49
9.1k
700k
LT 2178/LT 2179
APPLICATIONS INFORMATION
Please see the LT2078/LT2079 data sheet for applications information. All comments relating to specifications, single supply operation and phase reversal protection are directly applicable to the LT2178/LT2179.
Micropower 100Hz to 1MHz V-to-F Converter
1.5M 7V TO 10V 100k 220k* 50k 1MHz TRIM 1N4148 NC 12k 100 10k
VIN 0V TO 5V
100Hz TRIM 240k TYP
+
A1 1/2 LT2178
47k 0.01F
2k
Q8 2N3906
-
0.33F
2F
3pF
LTC(R)201 1N1 S1 D1 D2 0.022F S2 S4 1N2 500pF POLYSTYRENE S3 D3 D4 1N4 1N3
U
W
U
U
+
A2 1/2 LT2178
+
1F
+
1F
-
LT1004-2.5
Q7 2N3904 VDD CLK 74C14 10M FOUT CD4024 VSS Q7
RESET
V+
V- GND
LT2178/79 * TA03
LINEARITY IS 0.02% QUIESCENT CURRENT IS 90A SUPPLY CURRENT IS 360A AT 1MHz DRIFT = 50ppm/C *TRWMTR/5 + 120ppm/C
9
LT2178/LT 2179
PACKAGE DESCRIPTION
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.016 - 0.050 0.406 - 1.270 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
10
U
Dimensions in inches (millimeters) unless otherwise noted.
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 - 0.197* (4.801 - 5.004) 8 7 6 5
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1
2
3
4
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) BSC
SO8 0695
LT 2178/LT 2179
PACKAGE DESCRIPTION
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0 - 8 TYP
0.016 - 0.050 0.406 - 1.270
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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
Dimensions in inches (millimeters) unless otherwise noted.
S Package 14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 - 0.344* (8.560 - 8.738) 14 13 12 11 10 9 8
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1
2
3
4
5
6
7
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
S14 0695
11
LT2178/LT 2179
TYPICAL APPLICATION
Single Supply, 1kHz, 4th Order Butterworth Lowpass Filter
C1 1000pF R1 301k C2 1000pF 1000pF R2 86k
VIN
-
1/4 LT2179
+
301k
50k 3.3V 50k
12-BIT ACCURATE SIGNAL RANGE FROM 6mV TO 1.8V ON 3.3V SINGLE SUPPLY. MAXIMUM OUTPUT OFFSET ERROR IS 448V. FOR EACH 2ND ORDER SECTION: 1 C1C2R1R2 1 R1 = WOQC1 Q R2 = WOC2 WO2 =
GAIN(dB)
RELATED PARTS
PART NUMBER DESCRIPTION LT1078/LT1079 Dual/Quad 55A Max, Single Supply Precision Op Amps LT1211/LT1212 14MHz, 7V/s Single Supply Dual and Quad Precision Op Amps COMMENTS 70V VOS Max and 2.5V/C Drift Max, 200kHz BBW, 0.07V/s Slew Rate, Input/Output Common Mode Includes Ground 275V VOS Max, 6V/C Drift Max Input Voltage Range Includes Ground
LT1490/LT1491 Dual/ Quad Micropower Rail-to-Rail Input and Output Op Amps Single Supply Input Range: -0.4V to 44V, Micropower 50A Amplifier, Rail-to-Rail Input and Output, 200kHz GBW LT2078/LT2079 Dual/Quad 55A Max, Single Supply Precision Op Amps 70V VOS Max and 2.5V/C Drift Max, 200kHz BBW, 0.07V/s Slew Rate, Input/Output Common Mode Includes Ground Surface Mount Standard Pinout
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
U
1000pF
-
1/4 LT2179
121k
-
1/4 LT2179
+
221k
-
1/4 LT2179 VOUT
+
121k
+
2178/79 TA04
+
1F
10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 0.1 1 FREQUENCY (kHz) 10
LT2178/79 * TA05
LT/GP 1196 7K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1996

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