2kHz, Micropower Operational Amplifier CA3078 CA3078A high gain m
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CA3078, CA3078A
2kHz, Micropower Operational Amplifier
CA3078 CA3078A high gain monolithic operational amplifiers which deliver milliamperes current only consume microwatts standby power. Their operating points externally adjustable frequency compensation accomplished with external capacitor. CA3078 CA3078A provide designer with opportunity tailor frequency response improve slew rate without sacrificing power. Operation with single 1.5V battery practical reality with these devices. CA3078A premium device having supply voltage range 0.75V 15V. CA3078 same lower supply voltage limit upper limit -6V.
November 1996
Features
Standby Power 700nW Wide Supply Voltage Range ±0.75V ±15V High Peak Output Current 6.5mA (Min) Adjustable Quiescent Current Output Short Circuit Protection
Applications
Portable Electronics Medical Electronics Instrumentation Telemetry Intrusion Alarms
Ordering Information
PART NUMBER TEMP. (BRAND) RANGE (oC) CA3078AE CA3078AM (3078A) CA3078AM96 (3078A) CA3078AT CA3078E CA3078M (3078) CA3078T PACKAGE PDIP SOIC PKG. E8.3 M8.15
SOIC Tape Reel M8.15 Metal PDIP SOIC Metal T8.C E8.3 M8.15 T8.C
Pinouts
CA3078 (PDIP, SOIC) VIEW
COMP INV. INPUT NON-INV. INPUT COMP
Schematic Diagram
CA3078 CA3078A
NONINVERTING INVERTING BIAS OUTPUT
OUTPUT BIAS
CA3078 (METAL CAN) VIEW
COMP INV. INPUT NON-INV. INPUT OUTPUT RSET
BIAS COMPENSATION
NOTE: connected case.
CAUTION: These devices sensitive electrostatic discharge. Users should follow proper Handling Procedures. Copyright
Harris Corporation 1996
File Number
535.3
3-36
CA3078, CA3078A
Absolute Maximum Ratings
Supply Voltage (Between Terminal) CA3078 CA3078A. Differential Input Voltage. Input Voltage. VInput Current. 0.1mA Output Short Circuit Duration (Note Limitation
Thermal Information
Thermal Resistance (Typical, Note (oC/W) (oC/W) PDIP Package SOIC Package Metal Package Maximum Junction Temperature (Metal Package) 175oC Maximum Junction Temperature (Plastic Package) 150oC Maximum Storage Temperature Range -65oC 150oC Maximum Lead Temperature (Soldering 10s) 300oC (SOIC Lead Tips Only)
Operating Conditions
Temperature Range CA3078 70oC CA3078A. -55oC 125oC
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied.
NOTES: Short circuit applied ground either supply. measured with component mounted evaluation board free air.
Electrical Specifications
Equipment Design CA3078 LIMITS CA3078A LIMITS RSET 5.1M 70oC 1560 1800 ±5.1 25oC 0.70 0.50 ±5.3 -5.5 +5.8 -55oC 125oC UNITS µV/V µV/V
TEST CONDITIONS
RSET 25oC ±5.1 1200 ±5.3 -5.5 +5.8
PARAMETER VICR CMRR IOM+ IOMVIO/V+ VIO/V-
V±6V
RSET CMRR ±15V ±13.7 ±14.1 0.50 ±13.5 1350
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CA3078, CA3078A
Electrical Specifications
25oC, Typical Values Intended Only Design Guidance CA3078 +1.3V, -1.3V RSET -0.8 +1.1 +0.75V, -0.75V RSET -0.2 +0.5 +1.3V, -1.3V RSET -0.8 +1.1 CA3078A +0.75V, -0.75V RSET 0.054 0.45 -0.2 +0.5
PARAMETER VOP-P VICR CMRR IOM± VIO/V±
UNITS µV/V
Electrical Specifications
25oC VSUPPLY ±6V, Typical Values Intended Only Design Guidance CA3078 CA3078A RSET 5.1M 0.027 0.25 RSET 0.04 UNITS µV/oC pA/oC V/µs V/µs nV/Hz pA/Hz
PARAMETER VIO/TA IIO/TA BWOL
TEST CONDITIONS Figures
RSET 0.04
eN(10Hz) iN(10Hz)
Rise Time
0.87
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CA3078, CA3078A Test Circuits
100k 100k 100k OPTIONAL COMP. OPTIONAL COMP. VOUT 100k
RSET
RSET
CA3078 CA3078A
CA3078 CA3078A
VOUT
FIGURE TRANSIENT RESPONSE SLEW RATE, UNITY GAIN (INVERTING) TEST CIRCUIT
NON-INVERTING INPUT CA3078 CA3078A
FIGURE SLEW RATE, UNITY GAIN (NON-INVERTING) TEST CIRCUIT
INVERTING INPUT
OUTPUT
CA3078 CA3078A OUTPUT
Value required have null adjustment range ±7.5mV 10-3 assuming
Value required have null adjustment range ±7.5mV 10-3 assuming
FIGURE OFFSET VOLTAGE NULL CIRCUITS
5.1M 5.1M
VP-P 510k
RSET VP-P 1.5V "AA" CELL
510k
RSET 1.5V "AA" CELL
CA3078 CA3078A
CA3078 CA3078A
FIGURE INVERTING 20dB AMPLIFIER CIRCUIT
FIGURE NON-INVERTING 20dB AMPLIFIER CIRCUIT
3-39
CA3078, CA3078A
TABLE UNITY GAIN SLEW RATE COMPENSATION CA3078 CA3078A VSUPPLY ±6V, Output Voltage (VO) ±5V, Load Resistance (RL) 10k, Transient Response: overshoot output voltage 100mV, Ambient Temperature (TA) 25oC UNITY GAIN (INVERTING) FIGURE COMPENSATION TECHNIQUE CA3078 100µA Single Capacitor Resistor Capacitor Input CA3078A 20µA Single Capacitor Resistor Capacitor Input SLEW RATE V/µs UNITY GAIN (NON-INVERTING) FIGURE SLEW RATE V/µs
0.25
0.306
0.0085 0.04 0.67
1500
0.311
0.45
0.0095 0.024 0.67
0.644
0.156
0.0095 0.027 0.29
0.77
0.003 0.02
Application Information
Compensation Techniques CA3078A CA3078 phase compensated with external components depending upon closed loop gain, power consumption, speed desired. recommended compensation resistor series with capacitor connected from Terminal Terminal Values resistor capacitor required compensation function closed loop gain shown Figures These curves represent compensation necessary quiescent currents 100µA 20µA, respectively, transient response with overshoot. Figures show slew rates that obtained with different compensation techniques. Higher speeds achieved with input compensation, this increases noise output. Compensation also accomplished with single capacitor connected from Terminal Terminal with speed being sacrificed simplicity. Table gives indication slew rates that obtained with various compensation techniques quiescent currents 100µA 20µA. Single Supply Operation CA3078A CA3078 operate from single supply with minimum total supply voltage 1.5V. Figures show CA3078A CA3078 inverting non-inverting 20dB amplifier configurations utilizing 1.5V type "AA" cell supply. total consumption either circuit approximately 675nW. output voltage swing this configuration 300mVP-P with load.
Typical Performance Curves
25oC INPUT OFFSET VOLTAGE (mV) 25oC
INPUT OFFSET CURRENT (nA)
CA3078 CA3078A
1000 TOTAL QUIESCENT CURRENT (µA) CA3078 CA3078A
0.01 1000 TOTAL QUIESCENT CURRENT (µA) 10000
FIGURE INPUT OFFSET VOLTAGE TOTAL QUIESCENT CURRENT
FIGURE INPUT OFFSET CURRENT TOTAL QUIESCENT CURRENT
3-40
CA3078, CA3078A Typical Performance Curves
25oC OPEN LOOP VOLTAGE GAIN (dB) INPUT BIAS CURRENT (nA)
(Continued)
25oC CA3078A CA3078 TOTAL QUIESCENT CURRENT (µA) 1000 25oC 1000 TOTAL QUIESCENT CURRENT (µA) 10pF 30pF 1000
CA3078 CA3078A
1000 10000 TOTAL QUIESCENT CURRENT (µA)
FIGURE INPUT BIAS CURRENT TOTAL QUIESCENT CURRENT
FIGURE OPEN LOOP VOLTAGE GAIN TOTAL QUIESCENT CURRENT
1000 MAXIMUM OUTPUT CURRENT (mA) BIAS SETTING RESISTANCE 25oC RSET CONNECTED BETWEEN TERMINAL 0.01 1000 0.01 TOTAL QUIESCENT CURRENT (µA) 0.001
FIGURE BIAS SETTING RESISTANCE TOTAL QUIESCENT CURRENT
±1.3V 25oC
FIGURE MAXIMUM OUTPUT CURRENT TOTAL QUIESCENT CURRENT
OUTPUT VOLTAGE SWING
OPEN LOOP VOLTAGE GAIN (dB)
TOTAL QUIESCENT CURRENT (µA)
10k, 25oC BETWEEN TERMINALS FREQUENCY (Hz)
FIGURE OUTPUT VOLTAGE SWING TOTAL QUIESCENT CURRENT
FIGURE OPEN LOOP VOLTAGE GAIN FREQUENCY CA3078
3-41
PHASE ANGLE (DEGREES)
CA3078 100µA
CA3078, CA3078A Typical Performance Curves
OPEN LOOP VOLTAGE GAIN (dB) 20µA 25oC
(Continued)
VICR PEAK OUTPUT VOLTAGE (V), COMMON MODE VOLTAGE RANGE
10pF 30pF
1000 25oC BETWEEN TERMINALS
+0.1 -0.1 -0.1 SUPPLY VOLTS (V+, 1.75 1.50 1.25 1.00 0.75 0.50 0.25 +100 -100
FREQUENCY (Hz)
FIGURE OPEN LOOP VOLTAGE GAIN FREQUENCY CA3078A
CA3078 100µA
-VICR -VOM
INPUT OFFSET VOLTAGE (mV)
CA3078A 20µA
TEMPERATURE (oC)
FIGURE OUTPUT COMMON MODE VOLTAGE SUPPLY VOLTAGE
FIGURE INPUT OFFSET VOLTAGE TEMPERATURE
INPUT OFFSET CURRENT (nA) CA3078AT
INPUT OFFSET CURRENT (nA) CA3078T
INPUT BIAS CURRENT (nA) CA3078AT
INPUT BIAS CURRENT (nA) CA3078T 15.0 12.5 10.0 CA3078 100µA CA3078A 20µA
CA3078A 20µA CA3078 100µA
TEMPERATURE (oC)
TEMPERATURE (oC)
FIGURE INPUT OFFSET CURRENT TEMPERATURE
FIGURE INPUT BIAS CURRENT TEMPERATURE
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PHASE ANGLE (DEGREES)
CA3078A 20µA
CA3078, CA3078A Typical Performance Curves
OPEN LOOP VOLTAGE GAIN (dB) CA3078A 20µA CA3078 100µA
(Continued)
TOTAL QUIESCENT CURRENT (µA) CA3078AT TOTAL QUIESCENT CURRENT (µA) CA3078T
CA3078 CA3078A
TEMPERATURE (oC)
TEMPERATURE (oC)
FIGURE OPEN LOOP VOLTAGE GAIN TEMPERATURE
FIGURE TOTAL QUIESCENT CURRENT TEMPERATURE
EQUIVALENT INPUT NOISE VOLTAGE (nV/Hz)
25oC CA3078AT
EQUIVALENT INPUT NOISE CURRENT (pA/Hz)
20µA
25oC CA3078AT
100µA 20µA
100µA
FREQUENCY (Hz)
0.01
FREQUENCY (Hz)
FIGURE EQUIVALENT INPUT NOISE VOLTAGE FREQUENCY
FIGURE EQUIVALENT INPUT NOISE CURRENT FREQUENCY
3-43
CA3078, CA3078A Typical Performance Curves
(Continued)
SLEW RATE (V/µs)
0.75 0.25
SLEW RATE (V/µs)
RESISTOR-CAPACITOR COMPENSATION BETWEEN 1.25 TERMINALS CAPACITOR COMPENSATION (BETWEEN TERMINALS
RESISTOR-CAPACITOR COMPENSATION BETWEEN TERMINALS CAPACITOR COMPENSATION (BETWEEN TERMINALS
CLOSED LOOP NON-INVERTING VOLTAGE GAIN (dB) 19.1 29.7 CLOSED LOOP INVERTING VOLTAGE GAIN (dB)
CLOSED LOOP NON-INVERTING VOLTAGE GAIN (dB) 19.1 29.7 CLOSED LOOP INVERTING VOLTAGE GAIN (dB)
Supply Volts: Quiescent Current (IQ) 100µA Ambient Temperature (TA) 25oC Load Impedance: 10k, 100pF Feedback Resistance (RF) 0.1M Output Voltage (VOP-P) determined transient response with overshoot 100mV output signal 10-6) FIGURE SLEW RATE CLOSED LOOP GAIN 100µA CA3078
Supply Volts: Quiescent Current (IQ) 20µA Ambient Temperature (TA) 25oC Load Impedance: 10k, 100pF Feedback Resistance (RF) 0.1M Output Voltage (VOP-P) determined transient response with overshoot 100mV output signal 10-6) FIGURE SLEW RATE CLOSED LOOP GAIN 20µA CA3078A
PHASE COMPENSATION CAPACITOR (pF)
1000
CAPACITOR COMPENSATION (BETWEEN TERMINALS RESISTOR-CAPACITOR COMPENSATION BETWEEN TERMINALS
PHASE COMPENSATION CAPACITOR (pF)
1000
CAPACITOR COMPENSATION (BETWEEN TERMINALS RESISTOR-CAPACITOR COMPENSATION BETWEEN TERMINALS
CLOSED LOOP NON-INVERTING VOLTAGE GAIN (dB) 19.1 29.7 CLOSED LOOP INVERTING VOLTAGE GAIN (dB)
CLOSED LOOP NON-INVERTING VOLTAGE GAIN (dB) 19.1 29.7 CLOSED LOOP INVERTING VOLTAGE GAIN (dB)
Supply Volts: Quiescent Current (IQ) 100µA Ambient Temperature (TA) 25oC Load Impedance: 10k, 100pF Feedback Resistance (RF) 0.1M Output Voltage (VOP-P) 100mV determined transient response with overshoot 100mV output signal 10-6) FIGURE PHASE COMPENSATION CAPACITANCE CLOSED LOOP GAIN CA3078
Supply Volts: Quiescent Current (IQ) 20µA Ambient Temperature (TA) 25oC Load Impedance: 10k, 100pF Feedback Resistance (RF) 0.1M Output Voltage (VOP-P) 100mV determined transient response with overshoot 100mV output signal 10-6) FIGURE PHASE COMPENSATION CAPACITANCE CLOSED LOOP GAIN CA3078A
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