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NTE725 Integrated Circuit Dual Low Noise Preamp/OP Amp
Description: The NTE725 consists of two identical high-gain operational amplifiers constructed on a single chip. These 3-stage amplifiers use Class A PNP transistor output stages with uncommitted collectors. This enables a variety of loads to be employed for general purpose applications from DC to 10MHz, where two high performance operation amplifiers are required. In addition, the outputs may be wired-OR for use as a dual comparator or they may function as diodes in low thershold rectifying circuits such as absolute value amplifiers, peak detectors, etc. Features: D Single or Dual Supply Operation D Low Power Consumption D High Gain D Large Common Mode Range: +11V, -13V D Excellent Gain Stability vs. Supply Voltage D No Latch-Up D Output Short Circuit Protected Absolute Maximum Ratings: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650mW Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Input Voltage (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Output Short Circuit Duration (TA = +25C, Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30sec Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Lead temperature (During Soldering, 60sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260C Note 1. For supply voltages less than 15V, the absolute maximum input voltage is equal to the supply voltage. Note 2. Short circit may be to GND or either supply.
Electrical Characteristics: (TA = +25C, V+ = 15V, RL = 5k to Pin7 unless otherwise specified)
Parameter Input Offset Voltage Input Offset Current V+ = 4V, RL = 10k to Pin7 Input Bias Current V+ = 4V, RL = 10k to Pin7 Input Resistance Large Signal Voltage Gain Positive Output Voltage Swing V+ = 4V, RL = 10k to Pin7 Negative Output Voltage Swing V+ = 4V, RL = 10k to Pin7 Output Resistance Common Mode Rejection Ratio Supply Voltage Rejection Ratio Input Voltage Range Internal Power Dissipation Supply Current Broadband Noise Figure Turn-On Delay Turn-Off Delay Slew Rate (Unity Gain) Channel Separation V+ = 4V, RL = 10k to Pin7, VOUT = 0 VOUT = 0 V+ = 4V, RL = 10k to Pin7, VOUT = 0 RS = 10k, BW = 10Hz to 10kHz Open Loop, VIN = 20mV Open Loop, VIN = 20mV C1 = 0.02F, R1 = 33, C2 = 10pF RS = 1k, f = 10kHz
Pin Connection Diagram
Test Conditions RS = 200 V+ = 4V, RL = 10k to Pin7, RS = 200
Min - - - - - - 37 6.5k 2.5k +12 -14 -3.6 - 70 - -10 - - - - - - - -
Typ 1.0 1.0 50 50 0.3 300 150 20k 15k +13 -15 -4.0 5.0 90 50 - 20 9 2.5 2.0 0.2 0.3 1.0 140
Max 6.0 6.0 1000 1000 2.0 - - - - - - - - - - - +11 - 14 - - - - - -
Unit mV mV nA nA A A k V/V V/V V V V V k dB V/V V mW mA mA dB s s V/s dB
VOUT = 10V V+ = 4V, RL = 10k to Pin7, VOUT = 2V
+2.5 +2.8
f = 1kHz RS = 200, VIN = +11.5v to -13.5V RS = 200
Output A Output Lag A Input Lag A Input Lag A Non-Invert Input A Inverting input A (-) VCC
1 2 3 4 5 6 7
14 (+) VCC 13 Output B 12 Output Lag B 11 Input Lag B 10 Input Lag B 9 8 Non-Invert Input B Inverting Input B
14
8
1
7
.785 (19.95) Max .200 (5.08) Max
.300 (7.62)
.100 (2.45) .600 (15.24)
.099 (2.5) Min

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