LT1789-1/LT1789-10 are micropower, precision instrumentation amplifiers optimized for single supply operation from 2.2V to 36V. The quiescent current is 95μA max, the inputs common mode to ground and the output swings within 110mV of ground. The gain is set with a single external resistor for a gain range of 1 to 1000 for the LT1789-1 and 10 to 1000 for the LT1789-10. The high accuracy of the LT1789-1 (40ppm maximum non-linearity and 0.25% max gain error) is unmatched by other micropower instrumentation amplifiers. The LT1789-10 maximizes both the input common mode range and dynamic output range when an amplification of 10 or greater is required, allowing precise signal processing where other instrumentation amplifiers fail to operate. The LT1789-1/LT1789-10 are laser trimmed for very low input offset voltage, low input offset voltage drift, high CMRR and high PSRR. The output can handle capacitive loads up to 400pF (LT1789-1), 1000pF (LT1789-10) in any gain configuration while the inputs are ESD protected up to 10kV (human body). The LT1789-1/LT1789-10 are offered in the 8-pin SO package, requiring significantly less PC board area than discrete multi op amp and resistor designs.
The LT1789‑1 and LT1789‑10 are micropower, precision instrumentation amplifiers optimized for single‑supply operation from 2.2 V to 36 V. They feature ultra‑low supply current (95 pA max), low input offset voltage (100 pV max) and a gain set by a single external resistor.
The document provides detailed absolute maximum ratings, electrical characteristics across temperature ranges, package dimensions, recommended solder pad layout, typical application circuits, and a list of related parts.
| Supply Current (quiescent) | 95 pA max |
|---|---|
| Input Offset Voltage | 100 pV max |
| Gain Range (LT1789‑1) | 1 to 1000 |
| Gain Range (LT1789‑10) | 10 to 1000 |
| Bandwidth (G=1) | 60 kHz |
| Output Voltage Swing Low | 54 mV typical |
The LT1789‑1 draws a maximum of 95 pA supply current.
The LT1789‑10 can be set for a gain from 10 to 1000 using a single external resistor.
The absolute maximum supply voltage is 36 V.
At a gain of 1 the bandwidth is specified as 60 kHz.