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LT1672/LT1673/LT1674 2A Max, AV 5 Single, Dual and Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps
FEATURES
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DESCRIPTIO
Gain of 5 Stable Low Supply Current: 2A Max per Amplifier Rail-to-Rail Input and Output Low Offset Voltage: 375V Max Over-The-TopTM Inputs Operate Above V+ Gain Bandwidth Product: 12kHz Wide Supply Range: 2.2V to 36V Single Supply Input Range: - 0.3V to 36V Low Input Bias Current: 250pA Low Input Offset Current: 20pA High AVOL: 100V/mV Minimum Driving 100k Load Output Sources and Sinks 500A Load Current Reverse Battery Protected to 18V
The LT (R)1672/LT1673/LT1674 are ultralow power (IS 2A) decompensated (AV 5) op amps with precision specifications. The extremely low supply current is combined with excellent amplifier specifications: input offset voltage is 375V maximum with a typical drift of only 0.4V/C, input offset current is 100pA maximum. A minimum open-loop gain (AVOL) of 100V/mV ensures that gain errors are small. The devices' characteristics change little over the supply range of 2.2V to 15V. Supply rejection is 90dB and the common mode rejection ratio is 90dB. Operation is specified for 3V, 5V and 15V supplies. Reverse battery protection (-18V min) and inputs that operate above the positive supply make the LT1672/ LT1673/LT1674 easy to use in harsh environments. The low bias currents and offset current of the amplifier permit the use of megohm level source resistors without introducing significant errors. Voltage noise at 4VP-P is remarkably low considering the low supply current. For unity gain stable versions of these amplifiers, see the LT1494/LT1495/LT1496. The LT1672 is available in the 8-pin MSOP, PDIP and SO packages. The LT1673 is available in plastic 8-pin PDIP and SO-8 packages with the standard dual op amp pinout. The LT1674 is available in 14-pin PDIP and SO packages.
APPLICATIO S
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Battery- or Solar-Powered Systems Portable Instrumentation Remote Sensor Amplifier Micropower Filter Photodiode Amplifier High Impedance Circuits
, LTC and LT are registered trademarks of Linear Technology Corporation. Over-The-Top is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
Single Supply, 60W Precision Instrumentation Amplifier
5V 100k* VIN1
80
+
1/2 LT1673
1M 5V 1M 100k
110k
UNITS
- -
1000pF 110k
1M
100k 1M
LT1672
VOUT
+
1M 5V 0.0047F LT1389-2.5
1672/3/4 TA01
-
100k* VIN2 1/2 LT1673
+
AV = 100 BANDWIDTH = 1kHz CMRR = 65dB AT 120Hz *500V TRANSIENT PROTECTION TOTAL SUPPLY CURRENT = 12A
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TC VOS Distribution
120 AMPLIFIERS 70 VS = 2.5V - 40C to 85C 60 50 40 30 20 10 0 -1.5 - 0.9 - 0.3 0.3 TC VOS (V/C) 0.9 1.5
1672/3/4 TA02
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1
LT1672/LT1673/LT1674
ABSOLUTE AXI U RATI GS
Total Supply Voltage (V + to V -) .............................. 36V Differential Input Voltage ......................................... 36V Input Current ...................................................... 10mA Output Short-Circuit Duration ....................... Continuous Operating Temperature Range (Note 2) .. - 40C to 85C
PACKAGE/ORDER I FOR ATIO
TOP VIEW NC -IN +IN V- 1 2 3 4 8 7 6 5 NC V+ OUT NC
ORDER PART NUMBER LT1672CMS8 LT1672IMS8
NC 1 -IN 2 +IN 3 V- 4
MS8 PACKAGE 8-LEAD PLASTIC MSOP
TJMAX = 150C, JA = 250C/ W
MS8 PART MARKING LTFH LTFJ
TOP VIEW OUT A 1 -IN A 2 A +IN A 3 V- 4 N8 PACKAGE 8-LEAD PDIP B 5 8 7 6 V+ OUT B -IN B +IN B
ORDER PART NUMBER LT1673CN8 LT1673CS8 LT1673IN8 LT1673IS8 S8 PART MARKING 1673 1673I
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 150C/ W (N8) TJMAX = 150C, JA = 190C/ W (S8)
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
TA = 25C, VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half supply, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VS = 5V VS = 3V VS = 5V, MS8 Package VS = 3V, MS8 Package (Note 5) VCM = 10V (Note 6) (Note 5) 0.1Hz to 10Hz MIN TYP 150 200 150 200 250 180 20 4 MAX 375 475 475 575 1000 360 100 UNITS V V V V pA nA pA VP-P
IB IOS
Input Bias Current Input Offset Current Input Noise Voltage
2
U
U
W
WW
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W
(Note 1)
Specified Temperature Range (Note 3) ... - 40C to 85C Storage Temperature Range ................. - 65C to 150C Junction Temperature ........................................... 150C Lead Temperature (Soldering, 10 sec).................. 300C
TOP VIEW 8 7 6 5 NC V+ OUT NC
ORDER PART NUMBER LT1672CN8 LT1672CS8 LT1672IN8 LT1672IS8 S8 PART MARKING 1672 1672I ORDER PART NUMBER LT1674CN LT1674CS LT1674IN LT1674IS
N8 PACKAGE 8-LEAD PDIP
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 130C/ W (N8) TJMAX = 150C, JA = 190C/ W (S8)
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V+ 4 +IN B 5 -IN B 6 OUT B 7 N PACKAGE 14-LEAD PDIP B C A D 14 OUT D 13 -IN D 12 +IN D 11 V - 10 +IN C 9 8 -IN C OUT C
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 150C, JA = 110C/ W (N) TJMAX = 150C, JA = 150C/ W (S)
LT1672/LT1673/LT1674
ELECTRICAL CHARACTERISTICS
TA = 25C, VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half supply, unless otherwise noted.
SYMBOL en in AVOL PARAMETER Input Noise Voltage Density Input Noise Current Density Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio CONDITIONS f = 100Hz f = 100Hz VS = 5V, VO = 0.25V to 4.5V, RL = 100k VS = 3V, VO = 0.25V to 2.5V, RL = 100k VCM = 0V to 4V, VS = 5V VCM = 0V to 10V, VS = 5V VS = 2.2V to 12V, VCM = VO = 0.5V MIN TYP 185 10 500 250 106 95 99 2.1 50 210 V+ - 0.035 V+ - 0.160 1.3 1.5 5 12 MAX UNITS nV/Hz fA/Hz V/mV V/mV V dB dB dB V mV mV V V mA A V V/ms kHz
CMRR PSRR VOL VOH ISC IS SR GBW
Power Supply Rejection Ratio Minimum Operating Supply Voltage Output Voltage Swing LOW No Load ISINK = 100A Output Voltage Swing HIGH No Load ISOURCE = 100A Short-Circuit Current (Note 5) Supply Current per Amplifier (Note 6) Reverse Supply Voltage IS = 10A per Amplifier Slew Rate AV = - 5, VS = 10V Gain Bandwidth Product f = 100Hz
100 50 0 90 74 90
36
2.2 100 410
V+ - 0.07 V+ - 0.32 0.7 -18 1.6
2
The q denotes the specifications which apply over the temperature range of 0C TA 70C. VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half supply, unless otherwise noted. (Note 3)
SYMBOL PARAMETER Input Offset Voltage VOS CONDITIONS VS = 5V VS = 3V VS = 5V, MS8 Package VS = 3V, MS8 Package (Note 4) (Note 5) VCM = 10V (Note 6) (Note 5) VS = 5V, VO = 0.25V to 4.5V, RL = 100k VS = 3V, VO = 0.25V to 2.5V, RL = 100k VCM = 0.2V to 4V, VS = 5V VCM = 0.2V to 10V, VS = 5V VS = 2.4V to 12V, VCM = VO = 0.5V No Load ISINK = 100A No Load ISOURCE = 100A (Note 5) (Note 6) MIN
q q q q q q q q q q q q q q q q q q q q q
VOS TC IB IOS AVOL
Input Offset Voltage Drift Input Bias Current Input Offset Current Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio Minimum Operating Supply Voltage Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current Supply Current per Amplifier
CMRR PSRR VOL VOH ISC IS
75 40 0.2 89 64 89
TYP 175 225 175 225 0.4 250 240 20 280 150 106 85 99 2.3 55 225 V+ - 0.04 V+ - 0.18 1.1 1.9
MAX 425 525 525 625 2 1200 500 120
36
2.4 110 450
V+ - 0.08 V+ - 0.36 0.6
2.8
UNITS V V V V V/C pA nA pA V/mV V/mV V dB dB dB V mV mV V V mA A
3
LT1672/LT1673/LT1674
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the temperature range of - 40C TA 85C. VS = 5V, 0V; VS = 3V, 0V; VCM = VO = half supply, unless otherwise noted. (Note 3)
SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS VS = 5V VS = 3V VS = 5V, MS8 Package VS = 3V, MS8 Package (Note 4) (Note 5) VCM = 10V (Note 6) (Note 5) VS = 5V, VO = 0.25V to 4.5V, RL = 100k VS = 3V, VO = 0.25V to 2.5V, RL = 100k VCM = 0.2V to 4V, VS = 5V VCM = 0.2V to 10V, VS = 5V VS = 2.7V to 12V, VCM = VO = 0.5V No Load ISINK = 100A No Load ISOURCE = 100A (Note 5) (Note 6) MIN
q q q q q q q q q q q q q q q q q q q q q
VOS TC IB IOS AVOL
Input Offset Voltage Drift Input Bias Current Input Offset Current Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio Minimum Operating Supply Voltage Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current Supply Current per Amplifier
CMRR PSRR VOL VOH ISC IS
55 30 0.2 88 62 88
TYP 200 250 200 250 0.4 250 275 20 215 115 106 75 99 2.6 60 245 V+ - 0.05 V+ - 0.19 0.9 2.1
MAX 475 575 575 675 2 1700 750 170
36
2.7 120 490
V+ - 0.10 V+ - 0.38 0.4
3.1
UNITS V V V V V/C pA nA pA V/mV V/mV V dB dB dB V mV mV mV mV mA A
TA = 25C, VS = 15V, VCM = VO = 0V, unless otherwise noted.
SYMBOL PARAMETER Input Offset Voltage VOS IB IOS AVOL CMRR PSRR VOL VOH ISC IS Input Bias Current Input Offset Current Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current Supply Current per Amplifier CONDITIONS MS8 Package MIN TYP 200 200 25 20 360 120 120 -14.85 -14.75 14.89 14.81 1.5 1.9 MAX 575 675 1000 100 21 UNITS V V pA pA V/mV V dB dB V V V V mA A
VO = 10V, RL = 100k VCM = - 15V to 14V VS = 5V to 15V RL = 1M RL = 100k RL = 1M RL = 100k
100 - 15 100 96
-14.70 -14.50
14.78 14.62 0.7
2.8
4
LT1672/LT1673/LT1674
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the temperature range of 0C TA 70C, VS = 15V, VCM = VO = 0V, unless otherwise noted. (Note 3)
SYMBOL PARAMETER Input Offset Voltage VOS IB IOS AVOL CMRR PSRR VOL VOH ISC IS Input Bias Current Input Offset Current Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current Supply Current per Amplifier CONDITIONS MS8 Package
q q q q
MIN
VO = 10V, RL = 100k VCM = -14.8V to 14V VS = 5V to 15V RL = 1M RL = 100k RL = 1M RL = 100k
q q q q q q q q q q
60 - 14.8 98 94
TYP 225 225 250 20 240 120 120 -14.84 -14.73 14.88 14.79 1.3 2.4
MAX 625 725 1200 120 21
-14.67 -14.46
14.76 14.58 0.6
3.5
UNITS V V pA pA V/mV V dB dB V V V mV mA A
The q denotes the specifications which apply over the temperature range of -40C TA 85C, VS = 15V, VCM = VO = 0V, unless otherwise noted. (Note 3)
SYMBOL PARAMETER VOS Input Offset Voltage IB IOS AVOL CMRR PSRR VOL VOH ISC IS Input Bias Current Input Offset Current Large-Signal Voltage Gain Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current Supply Current per Amplifier CONDITIONS MS8 Package
q q q q
MIN
VO = 10V, RL = 100k VCM = -14.8V to 14V VS = 5V to 15V RL = 1M RL = 100k RL = 1M RL = 100k
q q q q q q q q q q
50 - 14.8 96 92
TYP 250 250 250 20 200 114 120 -14.83 -14.72 14.87 14.77 1.1 2.8
MAX 675 775 1700 170 21
-14.66 -14.44
14.74 14.54 0.4
4.2
UNITS V V pA pA V/mV V dB dB V V V V mA A
Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The LT1672C/LT1673C/LT1674C and LT1672I/LT1673I/LT1674I are guaranteed functional over the Operating Temperature Range of - 40C to 85C. Note 3: The LT1672C/LT1673C/LT1674C are guaranteed to meet specified performance from 0C to 70C. The LT1672C/LT1673C/LT1674C are designed, characterized and expected to meet specified performance from
- 40C to 85C but are not tested or QA sampled at these temperatures. The LT1672I/LT1673I/LT1674I are guaranteed to meet specified performance from - 40C to 85C. Note 4: This parameter is not 100% tested. Note 5: VS = 5V limit guaranteed by correlation to VS = 3V and VS = 15V tests. Note 6: VS = 3V limit guaranteed by correlation to VS = 5V and VS = 15V tests.
5
LT1672/LT1673/LT1674 TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Input Offset Voltage
20 18 16 PERCENT OF UNITS (%) 14 12 10 8 6 4 2 0 -400 -300 -200 -100 0 100 200 300 400 INPUT OFFSET VOLTAGE (V)
1672/73/74 G01
SUPPLY CURRENT PER AMPLIFIER (A)
2.5 2.0 1.5 1.0 0.5 0 -40 -20 VS = 15V VS = 2.5V
CHANGE IN OFFSET VOLTAGE (V)
VS = 5V, 0V LT1672/73/74 5600 AMPLIFIERS
Output Saturation Voltage vs Load Current (Output Low)
1000 VS = 5V, 0V 1000
SATURATION VOLTAGE (mV)
SATURATION VOLTAGE (mV)
INPUT BIAS CURRENT (nA)
TA = 85C 100 TA = - 40C TA = 25C
10 0.1
1
10 100 LOAD CURRENT (A)
Gain and Phase Shift vs Frequency
90 80 70 VOLTAGE GAIN (dB) 60 50 40 30 20 10 0 -10 100 1k FREQUENCY (Hz) GAIN PHASE VS = 2.5V 120 100 80
NOISE VOLTAGE (nV/Hz)
60 40 20 0 -20 -40 -60 -80 10k
200 150 100 50 0 1 10 FREQUENCY (Hz) 100
1672/3/4 G08
CURRENT NOISE (fA/Hz)
6
UW
1672/3/4 G04
1672/3/4 G07
Supply Current vs Temperature
3.0 200
Minimum Supply Voltage
150 100 TA = 85C 50 TA = 25C TA = - 40C
0
- 50 40 20 60 0 TEMPERATURE (C) 80 100 1 3 2 4 TOTAL SUPPLY VOLTAGE (V) 5
1672/3/4 G02
1672/3/4 G03
Output Saturation Voltage vs Load Current (Output High)
VS = 5V, 0V
300
Input Bias Current vs Common Mode Voltage
VS = 5V, 0V TA = 85C TA = 25C TA = - 40C
200
100
100 TA = 85C TA = - 40C TA = 25C
1.5 TA = 25C 0.5 TA = - 40C TA = 85C
1000
10 0.1
1
10 100 LOAD CURRENT (A)
1000
1672/3/4 G05
- 0.5
-1 0
12345678 COMMON MODE VOLTAGE (V)
9 10
1672/3/4 G06
Noise Voltage Spectrum
300 250
PHASE SHIFT (DEG)
Noise Current Spectrum
100 VS = 2.5V
VS = 2.5V
80
60
40
20
0 1 10 FREQUENCY (Hz) 100
1672/3/4 G09
LT1672/LT1673/LT1674 TYPICAL PERFORMANCE CHARACTERISTICS
Gain Bandwidth and Phase Margin vs Supply Voltage
16 MEASURED AT AV = 5 PHASE MARGIN 80
OUTPUT VOLTAGE (2V/DIV)
14
FREQUENCY (kHz)
OVERSHOOT (%)
12
10
8
6 0 5 10 15 20 SUPPLY VOLTAGE (V) 25
Common Mode Rejection Ratio vs Frequency
100
POWER SUPPLY REJECTION RATIO (dB)
COMMON MODE REJECTIO RATIO (dB)
90 80 70 60 50 40 30 20 10 0 100 1k FREQUENCY (Hz)
VS = 2.5V
70 60 50 40 30 20 10 0 10
OUTPUT IMPEDANCE (k)
Warm-Up Drift vs Time
40 30 20 15 10 5 0 -5 -10 -15 0 20 40 60 80 100 120 140 160 180 200 TIME AFTER POWER-UP (SEC)
1672/3/4 G16
OFFSET VOLTAGE CHANGE (V)
20 10 0 -10 -20 -30 - 40
OFFSET VOLTAGE CHANGE (V)
OFFSET VOLTAGE CHANGE (V)
VS = 15V
VS = 2.5V
UW
GBW
1672/3/4 G10
0.1Hz to 10Hz Output Voltage Noise
VS = 15V VCM = 0V
PHASE MARGIN (DEG)
80 70 60 50 40 30 20 10
30 30
Capacitive Load Handling
VS = 2.5V
70
60
50
AV = 5
40
AV = 10
0
TIME (1s/DIV)
1672/3/4 G07
10
100 1k CAPACITIVE LOAD (pF)
10k
1672/3/4 G12
Power Supply Rejection Ratio vs Frequency
100 90 80 +PSRR VS = 2.5V 100
Output Impedance vs Frequency
VS = 2.5V AV = 10 10 AV = 5
-PSRR
1
10k 20k
1672/3/4 G13
100 1k FREQUENCY (Hz)
10k
1672/3/4 G14
0.1 10 100 1k FREQUENCY (Hz) 10k
1672/3/4 G15
Open-Loop Gain VS = 5V, 0V
80 VS = 5V, 0V 60 40 20 0 -20 - 40 - 60
Open-Loop Gain VS = 15V
VS = 15V
RL = 100k RL = 1M
RL = 1M RL = 100k
- 20
0
1
4 3 OUTPUT VOLTAGE (V)
2
5
6
- 80 0 5 10 -20 -15 -10 -5 OUTPUT VOLTAGE (V)
15
20
1672/3/4 G17
1672/3/4 G18
7
LT1672/LT1673/LT1674 TYPICAL PERFORMANCE CHARACTERISTICS
Small-Signal Response Small-Signal Response Large-Signal Response
VS = 15V CL = 100pF AV = 5
APPLICATIO S I FOR ATIO
Start-Up Characteristics
Micropower op amps are sometimes not micropower during start-up, wreaking havoc on low current supplies. In the worst case, there may not be enough supply current available to take the system up to nominal voltages. Figure 1 is a graph of LT1673 supply current vs supply voltage for the three limit cases of input offset that could occur during start-up. The circuits are shown in Figure 2. One circuit creates a positive offset, forcing the output to come up saturated high. Another circuit creates a negative offset, forcing the output to come up saturated low, while the last brings up the output at half supply. In all cases, the supply current is well behaved. Supply current is highest with the output forced high, so if one amplifier is unused, it is best to force the output low or at half supply.
5
SUPPLY CURRENT PER AMPLIFIER (A)
4 OUTPUT HIGH
3
2
OUTPUT LOW OUTPUT VS/2
1
0 0 1 3 4 2 TOTAL SUPPLY VOLTAGE (V) 5
1672/3/4 FO1
Figure 1. Start-Up Characteristics
8
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UW
1672/3/4 G19
VS = 5V CL = 100pF AV = 5
1672/3/4 G20
VS = 5V CL = 100pF AV = 5
1672/3/4 G21
UU
V+
V+
V+
+ -
V- OUTPUT HIGH
+ -
V- OUTPUT LOW 200k
+ -
820k V-
16/2/3/4 F02
OUTPUT AT VS /2
Figure 2. Circuits for Start-Up Characteristics
Reverse Battery The LT1672/LT1673/LT1674 are protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs, the supply current is typically less than 100nA (inputs grounded and outputs open). For typical single supply applications with ground referred loads and feedback networks, no other precautions are required. If the reverse battery condition results in a negative voltage at either the input pins or output pin, the current into the pin should be limited by an external resistor to less than 10mA. Inputs While the LT1672/LT1673/LT1674 will function normally with its inputs taken above the positive supply, the common mode range does not extend beyond approximately 300mV below the negative supply at room temperature.
LT1672/LT1673/LT1674
APPLICATIO S I FOR ATIO
The device will not be damaged if the inputs are taken lower than 300mV below the negative supply as long as the current out of the pin is limited to less than 10mA. However, the output phase is not guaranteed and the supply current will increase. Output The graph, Capacitive Load Handling, shows amplifier stability with the output biased at half supply. If the output is to be operated within about 100mV of the positive rail, the allowable load capacitance is less. With this output voltage, the worst case occurs at AV = 5 and light loads, where the load capacitance should be less than 500pF with a 5V supply and less than 100pF with a 30V supply. Rail-to-Rail Operation The simplified schematic, Figure 3, details the circuit design approach of the LT1672/LT1673/LT1674. The amplifier topology is a three-stage design consisting of a rail-to-rail input stage, that continues to operate with the inputs above the positive rail, a folded cascode second stage that develops most of the voltage gain, and a rail-torail common emitter stage that provides the current gain. The input stage is formed by two diff amps Q1-Q2 and Q3Q6. For signals with a common mode voltage between V EE
D1 Q10 D2 D3
IN +
IN -
Q1 Q2
Q3
Q4
Q7
(V +) - 0.8V
Q5
Q6
Q9
Q8
Figure 3. Simplified Schematic
U
and (VCC - 0.8V), Q1 and Q2 are active. When the input common mode exceeds (VCC - 0.8V), Q7 turns on, diverting the current from diff amp Q1-Q2 to current mirror Q8-Q9. The current from Q8 biases on the other diff amp consisting of PNP's Q5-Q6 and NPN's Q3-Q4. Though Q5-Q6 are driven from the emitters rather than the base, the basic diff amp action is the same. When the common mode voltage is between (VCC - 0.8V) and VCC, devices Q3 and Q4 act as followers, forming a buffer between the amplifier inputs and the emitters of the Q5Q6. If the common mode voltage is taken above V CC, Schottky diodes D1 and D2 reverse bias and devices Q3 and Q4 then act as diodes. The diff amp formed by Q5-Q6 operates normally, however, the input bias current increases to the emitter current of Q5-Q6, which is typically 180nA. The graph, Input Bias Current vs Common Mode Voltage found in the Typical Performance Characteristics section, shows these transitions at three temperatures. The collector currents of the two-input pairs are combined in the second stage consisting of Q11 to Q16, which furnishes most of the voltage gain. Capacitor C1 sets the amplifier bandwidth. The output stage is configured for maximum swing by the use of common emitter output devices Q21 and Q22. Diodes D4 to D6 and current source Q15 set the output quiescent current.
D7 Q13 Q14 Q15
W
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+
I1 C1
Q20 Q21 OUT
Q16 Q11
Q17 D4 Q12 D5 D6
Q19
Q18 R1 R2 I2
Q22
1672/3/4 F03
9
LT1672/LT1673/LT1674
TYPICAL APPLICATIO S
Battery Current Monitor
IL CHARGE RSENSE 0.1
DISCHARGE RA RA
A2 1/2 LT1673
RA
2N3904 DISCHARGE OUT RB
CHARGE OUT RB
PACKAGE DESCRIPTIO
0.007 (0.18) 0.021 0.006 (0.53 0.015)
0 - 6 TYP SEATING PLANE 0.193 0.006 (4.90 0.15) 0.118 0.004** (3.00 0.102)
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.300 - 0.325 (7.620 - 8.255)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) 0.020 MIN (0.508) MIN 0.018 0.003 (0.457 0.076)
(
+0.035 0.325 -0.015 8.255 +0.889 -0.381
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
10
U
U
RA
Over-the-Top Comparator with Hysteresis
1M 5V (VCC) 5V 12V IN1 (0V TO 12V) 10k
-
+
LT1672 VOUT 1M 2N5087 1M
-
A1 1/2 LT1673
+
-
IN2 (0V TO 12V) 10k 1M 2N5210
+
2N3904 VO = IL
FOR RA = 10k, RB = 100k (RB/RA 5) VO = 1V/A IL 1672/3/4 TA04
()
RB RSENSE RA
V HYSTERESIS = CC 100 IS < 10A
1672/3/4 TA03
Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.043 (1.10) MAX 0.034 (0.86) REF 0.118 0.004* (3.00 0.102) 8 76 5
0.009 - 0.015 (0.22 - 0.38)
0.0256 (0.65) BSC
0.005 0.002 (0.13 0.05)
1
23
4
MSOP (MS8) 1100
N8 Package 8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.045 - 0.065 (1.143 - 1.651) 0.130 0.005 (3.302 0.127) 0.400* (10.160) MAX 8 7 6 5
0.255 0.015* (6.477 0.381)
1
2
3
4
0.100 (2.54) BSC
N8 1098
LT1672/LT1673/LT1674
PACKAGE DESCRIPTIO
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.014 - 0.019 (0.355 - 0.483) TYP *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
0.016 - 0.050 (0.406 - 1.270)
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.
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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)
0.050 (1.270) BSC
SO8 1298
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) TYP
0.050 (1.270) BSC
S14 1298
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LT1672/LT1673/LT1674
TYPICAL APPLICATIO
880nm IR PHOTODIODE OPTO-DIODE CORP ODD-45W
RELATED PARTS
PART NUMBER LTC(R)1440/41/42 LTC1443/LTC1444/LTC1445 LT1466/LT1467 LT1490A/LT1491A LT1494/LT1495/LT1496 LTC1540 LT1636 LT2078/LT2079 LT2178/LT2179 LT1782 LT1783 DESCRIPTION Micropower Single/Dual Comparators with 1% Reference Micropower Quad Comparators with 1% Reference 75A Dual/Quad Rail-to-Rail Input and Output Op Amps 50A Dual/Quad Rail-to-Rail Input and Output Op Amps 1.5A Max Single/Dual/Quad Over-the-Top Precision Rail-to-Rail Input and Output Op Amps Nanopower Single Comparator with 1% Reference Single Over-the-Top Micropower, Rail-to-Rail Input and Output Op Amp 55A Dual/Quad Single Supply Op Amps 17A Dual/Quad Single Supply Op Amps Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amp 1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23 COMMENTS LTC1440: Single, LTC1441/42: Dual LTC1443: 1.182 Reference LTC1444/45: 1.221V Reference and Adjustable Hysteresis 390V VOS(MAX), Gain Bandwidth = 120kHz 950V VOS(MAX), Gain Bandwidth = 200kHz Unity Gain Stable Version of the LT1672/LT1673/LT1674 350nA Supply Current 225V VOS(MAX), IS = 55A (Max), Gain Bandwidth = 200kHz, Shutdown Pin, MSOP 120V VOS(MAX), Gain Bandwidth = 200kHz 120V VOS(MAX), Gain Bandwidth = 60kHz SOT-23, 800V VOS(MAX) , IS = 55A (Max), Gain-Bandwidth = 200kHz, Shutdown Pin SOT-23, 800V VOS(MAX) , IS = 300A (Max), Gain-Bandwidth = 1.2MHz, Shutdown Pin
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX: (408) 434-0507 q www.linear-tech.com
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Micropower Photodiode Amplifier
C1 20pF R1 10M VS+ GAIN: AZ = 10M = VOUT IPHOTODIODE IPHOTODIODE 10% TO 90% RISE TIME: tr = 260s BANDWIDTH: BW = 1.7kHz
-
LT1672 CD 170pF VOUT VS = 1.2V TO 15V C1, CD SATISFY GAIN OF 5 STABILITY REQUIREMENT AT AC.
1672/3/4 TA05
+
VS-
167234f LT/TP 0101 4K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 2001

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