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 Test Conditions Input Offset Voltage Min Typ Max Unit RS = 200 - 1.0 6.0 mV V+ = 4V, RL = 10k to Pin7, RS = 200 - 1.0 6.0 mV - 50 1000 nA - 50 1000 nA - 0.3 2.0 A - 300 - A 37 150 - k VOUT = 10V 6.5k 20k - V/V V+ = 4V, RL = 10k to Pin7, VOUT = 2V 2.5k 15k - V/V +12 +13 - V +2.5 +2.8 - V -14 -15 - V -3.6 -4.0 - V 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 f = 1kHz - 5.0 - k Common Mode Rejection Ratio RS = 200, VIN = +11.5v to -13.5V 70 90 - dB Supply Voltage Rejection Ratio RS = 200 - 50 - V/V -10 - +11 V Input Voltage Range Internal Power Dissipation V+ = 4V, RL = 10k to Pin7, VOUT = 0 - 20 - mW Supply Current VOUT = 0 - 9 14 mA V+ = 4V, RL = 10k to Pin7, VOUT = 0 - 2.5 - mA Broadband Noise Figure RS = 10k, BW = 10Hz to 10kHz - 2.0 - dB Turn-On Delay Open Loop, VIN = 20mV - 0.2 - s Turn-Off Delay Open Loop, VIN = 20mV - 0.3 - s Slew Rate (Unity Gain) C1 = 0.02F, R1 = 33, C2 = 10pF - 1.0 - V/s Channel Separation RS = 1k, f = 10kHz - 140 - dB Pin Connection Diagram Output A 1 14 (+) VCC Output Lag A 2 13 Output B Input Lag A 3 12 Output Lag B Input Lag A 4 11 Input Lag B Non-Invert Input A 5 10 Input Lag B Inverting input A 6 9 Non-Invert Input B (-) VCC 7 8 Inverting Input B 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min