2MHz, Operational Transconductance Amplifier (OTA) CA3080 CA3080A
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CA3080, CA3080A
2MHz, Operational Transconductance Amplifier (OTA)
CA3080 CA3080A types Gatable-Gain Blocks which utilize unique (OTA) concept described Application Note AN6668, "Applications CA3080 CA3080A HighPerformance Operational Transconductance Amplifiers". CA3080 CA3080A types have differential input single-ended, push-pull, class output. addition, these types have amplifier bias input which used either gating linear gain control. These types also have high output impedance their transconductance (gM) directly proportional amplifier bias current (IABC). CA3080 CA3080A types notable their excellent slew rate (50V/µs), which makes them especially useful multiplexer fast unity-gain voltage followers. These types especially applicable multiplexer applications because power consumed only when devices "ON" channel state.
PKG. T8.C T8.C E8.3 M8.15 M8.15 E8.3 M8.15 M8.15
November 1996
Features
Slew Rate (Unity Gain, Compensated). 50V/µs Adjustable Power Consumption 10µW 30µW Flexible Supply Voltage Range ±15V Fully Adjustable Gain gMRL Limit Tight Spread: CA3080 CA3080A 1.6:1 Extended Linearity. Decades
Applications
Sample Hold Multiplexer Voltage Follower Multiplier Comparator
Ordering Information
PART NUMBER (BRAND) CA3080 CA3080A CA3080AE CA3080AM (3080A) CA3080AM96 (3080A) CA3080E CA3080M (3080) CA3080M96 (3080) TEMP. RANGE (oC) PACKAGE Metal Metal PDIP SOIC SOIC Tape Reel PDIP SOIC SOIC Tape Reel
CA3080A's characteristics specifically controlled applications such sample-hold, gain-control, multiplexing, etc.
Pinouts
CA3080 (PDIP, SOIC) VIEW
INV. INPUT NON-INV. INPUT OUTPUT AMPLIFIER BIAS INPUT NON-INV. INPUT BIAS INV. INPUT
CA3080 (METAL CAN) VIEW
OUTPUT
NOTE: connected case.
CAUTION: These devices sensitive electrostatic discharge. Users should follow proper Handling Procedures. Copyright
Harris Corporation 1996
File Number
475.3
3-45
CA3080, CA3080A
Absolute Maximum Ratings
Supply Voltage (Between Terminal). Differential Input Voltage. Input Voltage. VInput Signal Current Amplifier Bias Current (IABC) 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 Can) 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 CA3080. 70oC CA3080A -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, VSUPPLY ±15V, Unless Otherwise Specified CA3080 CA3080A 13000 7700 4000 0.12 0.008 0.71 0.024 13.6 -14.6 9600 12000 UNITS µV/oC µV/V µV/V
PARAMETER Input Offset Voltage
TEST CONDITIONS IABC IABC 500µA
TEMP Full
6700 5400
0.12 0.008 0.71 0.024 13.6 -14.6 9600
Input Offset Voltage Change Input Offset Voltage Temp. Drift Input Offset Voltage Sensitivity Input Offset Current Input Bias Current Positive Negative
IABC 500µA IABC 100µA IABC 500µA
Full
IABC 500µA IABC 500µA
Full
Differential Input Current Amplifier Bias Voltage Input Resistance Input Capacitance Input-to-Output Capacitance Common-Mode Input-Voltage Range Forward Transconductance (Large Signal) Output Capacitance Output Resistance Peak Output Current
IABC VDIFF IABC 500µA IABC 500µA IABC 500µA, 1MHz IABC 500µA, 1MHz IABC 500µA IABC 500µA
Full
IABC 500µA, 1MHz IABC 500µA IABC 5µA, IABC 500µA,
Full
3-46
CA3080, CA3080A
Electrical Specifications
Equipment Design, VSUPPLY ±15V, Unless Otherwise Specified (Continued) CA3080 PARAMETER Peak Output Voltage Positive Negative Positive Negative Amplifier Supply Current Device Dissipation Magnitude Leakage Current Propagation Delay Common-Mode Rejection Ratio Open-Loop Bandwidth Slew Rate IABC 500µA IABC 500µA IABC IABC IABC 500µA IABC 500µA IABC 500µA Uncompensated Compensated IABC 500µA, TEST CONDITIONS IABC 5µA, TEMP 13.8 -14.5 13.5 -14.4 0.08 CA3080A 13.8 -14.5 13.5 -14.4 0.08 UNITS V/µs V/µs
Schematic Diagram
INVERTING INPUT NONINVERTING INPUT AMPLIFIER BIAS INPUT OUTPUT
Typical Applications
0.01µF 390pF LOAD (SCOPE PROBE) 0.01µF OUTPUT 1V/DIV. ±15V
CA3080,
-15V
INPUT 5V/DIV. TIME -0.1µs/DIV.
0.001µF
FIGURE SCHEMATIC DIAGRAM CA3080 CA3080A UNITY-GAIN VOLTAGE FOLLOWER CONFIGURATION ASSOCIATED WAVEFORM
3-47
CA3080, CA3080A Typical Applications
20pF 8.2k
(Continued)
+7.5V VOLTAGE-CONTROLLED CURRENT SOURCE SYMMETRY 7.5V 100k FREQ. +7.5V 6.2k FREQ. ADJUST +7.5V 4.7k CA3080A -7.5V 80pF
BUFFER VOLTAGE FOLLOWER +7.5V 6.2k HIGHFREQ. SHAPE
CENTERING 100k -7.5V
THRESHOLD DETECTOR +7.5V +7.5V
0.1µF
430pF 6.8M
60pF CA3160
CA3080 -7.5V
EXTERNAL SWEEPING INPUT -7.5V
FREQ. -7.5V HIGH-FREQ. LEVEL ADJUST
2-1N914
FIGURE 1,000,000/1 SINGLE-CONTROL FUNCTION GENERATOR 1MHz
NOTE: Square-Wave Signal Modulates External Sweeping Input Produce 1MHz, showing 1,000,000/1 frequency range function generator. FIGURE TWO-TONE OUTPUT SIGNAL FROM FUNCTION GENERATOR
NOTE: bottom trace sweeping signal trace actual generator output. center trace displays 1MHz signal delayed oscilloscope triggering upper swept output signal. FIGURE TRIPLE-TRACE FUNCTION GENERATOR SWEEPING 1MHz
FIGURE FUNCTION GENERATOR DYNAMIC CHARACTERISTICS WAVEFORMS
3-48
CA3080, CA3080A Typical Applications
(Continued)
2.0k
+15V
INPUT 2.0k
0.01µF 3N138 0.01µF 300pF OUTPUT
CA3080A
STORAGE PHASE COMPENSATION NETWORK SAMPLE HOLD -15V
SLEW RATE SAMPLE MODE) 1.3V/µs ACQUISITION TIME (NOTE)
NOTE: Time required output settle within ±3mV step.
-15V
FIGURE SCHEMATIC DIAGRAM CA3080A SAMPLE-HOLD CONFIGURATION
STROBE 1N914 SAMPLE +15V HOLD 1N914 INPUT CA3080A CA3140 0.1µF -15V 100k 200pF 200pF 0.1µF SIMULATED LOAD REQUIRED 30pF -15V 0.1µF +15V 0.1µF 3.6k
FIGURE SAMPLE HOLD CIRCUIT
3-49
CA3080, CA3080A Typical Applications
(Continued) Trace: Bottom Trace: Center Trace: Output Signal 5V/Div., 2µs/Div. Input Signal 5V/Div., 2µs/Div. Difference Input Output Signals Through Tektronix Amplifier 7A13 5mV/Div., 2µs/Div.
FIGURE LARGE SIGNAL RESPONSE SETTLING TIME CIRCUIT SHOWN FIGURE
Trace: Bottom Trace:
System Output; 100mV/Div., 500ns/Div. Sampling Signal; 20V/Div., 500ns/Div.
Trace: Bottom Trace:
Output; 50mV/Div., 200ns/Div. Input; 50mV/Div., 200ns/Div.
FIGURE SAMPLING RESPONSE CIRCUIT SHOWN FIGURE
FIGURE INPUT OUTPUT RESPONSE CIRCUIT SHOWN FIGURE
THERMOCOUPLE 6.2K 150K 6.2K 1N914 1N914
100µF
LOAD
CA3080A
CA3079
120V 60Hz
NOTE: resistors watt, unless otherwise specified. FIGURE THERMOCOUPLE TEMPERATURE CONTROL WITH CA3079 ZERO VOLTAGE SWITCH OUTPUT AMPLIFIER
3-50
CA3080, CA3080A Typical Applications
(Continued)
SAMPLE CONTROL AMPLIFIER INPUT CA3080A (OTA) CA3130
+7.5V SAMPLE READ-OUT AMPLIFIER
+7.5V 0.1µF 100K OUTPUT
0.1µF 200pF -7.5V
e.g. 30pF (TYP)
SAMPLE HOLD -7.5 STROBE
NULLING STORAGE PHASE COMPENSATION -7.5V
0.1µF
FIGURE SCHEMATIC DIAGRAM CA3080A SAMPLE-HOLD CIRCUIT WITH BIMOS OUTPUT AMPLIFIER
Trace: Center Trace: Bottom Trace:
Output; 5V/Div., 2µs/Div. Differential Comparison Input Output 2mV/Div., 2µs/Div. Input; 5V/Div., 2µs/Div.
Trace: Bottom Trace:
Output 20mV/Div., 100ns/Div. Input 200mV/Div., 100ns/Div.
FIGURE LARGE-SIGNAL RESPONSE CIRCUIT SHOWN FIGURE
FIGURE SMALL-SIGNAL RESPONSE CIRCUIT SHOWN FIGURE
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CA3080, CA3080A Typical Applications
(Continued)
50mV -50mV IABC 500µA 1.2M -15V 1N914
CA3080,A
INPUT tPLH tPHL
OUTPUT
FIGURE PROPAGATION DELAY TEST CIRCUIT ASSOCIATED WAVEFORMS
Typical Performance Curves
INPUT OFFSET VOLTAGE (mV) 1000 0.01 1000 125oC 90oC 25oC -55oC -55oC 70oC 25oC 70oC SUPPLY VOLTS: ±15V 90oC 125oC INPUT OFFSET CURRENT (nA) SUPPLY VOLTS: ±15V
-55oC 25oC 125oC
AMPLIFIER BIAS CURRENT (µA)
AMPLIFIER BIAS CURRENT (µA)
FIGURE INPUT OFFSET VOLTAGE AMPLIFIER BIAS CURRENT
FIGURE INPUT OFFSET CURRENT AMPLIFIER BIAS CURRENT
SUPPLY VOLTS: ±15V PEAK OUTPUT CURRENT (µA) INPUT BIAS CURRENT (nA)
SUPPLY VOLTS: ±15V LOAD RESISTANCE
125oC 25oC
-55oC 25oC 125oC
-55oC
AMPLIFIER BIAS CURRENT (µA) 1000 AMPLIFIER BIAS CURRENT (µA) 1000
FIGURE INPUT BIAS CURRENT AMPLIFIER BIAS CURRENT
FIGURE PEAK OUTPUT CURRENT AMPLIFIER BIAS CURRENT
3-52
CA3080, CA3080A Typical Performance Curves
PEAK OUTPUT VOLTAGE COMMON MODE INPUT VOLTAGE 14.5 13.5 -13.5 -14.5 V-CMR AMPLIFIER BIAS CURRENT (µA) 1000 V-OM V+OM SUPPLY VOLTS: ±15V 25oC LOAD RESISTANCE V+CMR
(Continued)
AMPLIFIER SUPPLY CURRENT (µA)
SUPPLY VOLTS: ±15V 125oC
25oC
-55oC
125oC -55oC, 25oC AMPLIFIER BIAS CURRENT (µA) 1000
FIGURE PEAK OUTPUT VOLTAGE AMPLIFIER BIAS CURRENT
FIGURE AMPLIFIER SUPPLY CURRENT AMPLIFIER BIAS CURRENT
FORWARD TRANSCONDUCTANCE (µS)
DEVICE POWER DISSIPATION (µW)
25oC
SUPPLY VOLTS: ±15V -55oC 125oC 25oC
±15V
1000 AMPLIFIER BIAS CURRENT (µA)
1000
AMPLIFIER BIAS CURRENT (µA)
FIGURE TOTAL POWER DISSIPATION AMPLIFIER BIAS CURRENT
FIGURE TRANSCONDUCTANCE AMPLIFIER BIAS CURRENT
MAGNITUDE LEAKAGE CURRENT (nA)
+36V
SUPPLY VOLTS: ±15V
TEST POINT (VTP)
CA3080,
0.01
TEMPERATURE (oC)
FIGURE LEAKAGE CURRENT TEST CIRCUIT
FIGURE LEAKAGE CURRENT TEMPERATURE
3-53
CA3080, CA3080A Typical Performance Curves
(Continued)
SUPPLY VOLTS: ±15V DIFFERENTIAL INPUT CURRENT (pA)
VDIFF CA3080,
125oC
25oC
INPUT DIFFERENTIAL VOLTAGE
-15V
FIGURE DIFFERENTIAL INPUT CURRENT TEST CIRCUIT
FIGURE INPUT CURRENT INPUT DIFFERENTIAL VOLTAGE
SUPPLY VOLTS: ±15V 25oC AMPLIFIER BIAS VOLTAGE (mV) INPUT RESISTANCE
SUPPLY VOLTS: ±15V
-55oC
25oC
125oC
0.01 AMPLIFIER BIAS CURRENT (µA) 1000
AMPLIFIER BIAS CURRENT (µA)
1000
FIGURE INPUT RESISTANCE AMPLIFIER BIAS CURRENT
FIGURE AMPLIFIER BIAS VOLTAGE AMPLIFIER BIAS CURRENT
INPUT OUTPUT CAPACITANCE (pF)
OUTPUT RESISTANCE
SUPPLY VOLTS: ±15V 25oC
SUPPLY VOLTS: ±15V 25oC
AMPLIFIER BIAS CURRENT (µA) 1000 AMPLIFIER BIAS CURRENT (µA) 1000
FIGURE INPUT OUTPUT CAPACITANCE AMPLIFIER BIAS CURRENT
FIGURE OUTPUT RESISTANCE AMPLIFIER BIAS CURRENT
3-54
CA3080, CA3080A Typical Performance Curves
(Continued)
INPUT OUTPUT CAPACITANCE (pF)
0.06
0.01µF CA3080,
0.05 0.04 0.03 0.02
0.01
0.01µF
POSITIVE NEGATIVE SUPPLY VOLTAGE
FIGURE INPUT-TO-OUTPUT CAPACITANCE TEST CIRCUIT
FIGURE INPUT-TO-OUTPUT CAPACITANCE SUPPLY VOLTAGE
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