Available
The Texas Instruments UA747 is a dual general-purpose operational amplifier integrating two amplifiers in a 14-pin PDIP package. It incorporates internal frequency compensation, so no external compensation components are required to maintain stability.
It provides wide common-mode and differential input voltage ranges and is free from latch-up, making it particularly suitable for configurations such as voltage followers. Its outputs are short-circuit protected and the device is designed for low power consumption.
The UA747 can be used for signal conditioning, audio pre-amplification, active filters, voltage comparison and motor-control circuits. The electrical characteristics of the UA747C version are specified by the manufacturer with a ±15 V supply and for an operating ambient temperature range of 0–70 °C.
| Brand | Texas Instruments |
| Model | UA747 |
| Type | Dual general-purpose operational amplifier |
| Number of amplifiers | 2 |
| Package | PDIP (N), 14 pins |
| Nominal package dimensions | 19.3 × 9.4 mm |
| Frequency compensation | Internal; no external compensation required |
| Short-circuit output protection | Yes |
| Supply used for electrical characterisation | ±15 V |
| Absolute maximum supply voltage | VCC+ = 18 V; VCC− = −18 V |
| Absolute maximum differential input voltage | ±30 V |
| Absolute maximum input voltage | ±15 V, without exceeding the magnitude of the supply voltage |
| Input offset voltage | ±0.3 mV typical; 6 mV maximum at 25 °C; 7.5 mV maximum over the full operating range |
| Input offset current | ±0.5 nA typical; 200 nA maximum at 25 °C; 300 nA maximum over the full operating range |
| Input bias current | 500 nA maximum at 25 °C; 800 nA maximum over the full operating range |
| Common-mode input voltage range | ±12 V minimum; ±13 V typical at 25 °C |
| Peak-to-peak output voltage swing | RL = 10 kΩ: 24 V minimum, 28 V typical; RL = 2 kΩ: 20 V minimum, 26 V typical, at 25 °C |
| Output resistance | 300 Ω typical at 1 MHz, with IO = 0 A and 25 °C |
| Common-mode rejection ratio (CMRR) | 70 dB minimum; 80 dB typical at 25 °C |
| Short-circuit output current | ±40 mA typical at 25 °C |
| Supply current per amplifier | 0.35 mA typical and 2.8 mA maximum at 25 °C; 3.3 mA maximum over the full operating range, no load |
| Channel separation | 120 dB typical at 25 °C |
| Slew rate at unity gain | 0.5 V/µs typical at 25 °C |
| Operating ambient temperature | 0–70 °C |
| Storage temperature | −65–150 °C |
| Total dissipation, N package | 800 mW at TA ≤ 25 °C; 736 mW at TA = 70 °C |
