The INA333-Q1 is a low-power, precision instrumentation amplifier offering excellent accuracy. The three-op-amp design, small size, and low power make this device an excellent choice for automotive applications that require precise measurements, such as current leakage detection. This INA333-Q1 is also a great choice for applications that use resistive bridge sensors.
A single external resistor sets any gain from 1 to 1000. The INA333-Q1 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / RG).
The INA333-Q1 provides very low offset voltage (25 μV, G ≥ 100), excellent offset voltage drift (0.1 μV/°C, G ≥ 100), and high common-mode rejection (96 dB at G ≥ 10). The device operates with power supplies as low as 1.8 V (±0.9 V), and quiescent current is only 50 μA. Auto-calibration techniques maintain excellent precision over the automotive temperature range. The INA333-Q1 provides a very low peak-to-peak noise of 1 µV.
The INA333-Q1 device is available in an 8-pin VSSOP package and is specified over the TA = –40°C to +125°C temperature range.
Changes from Revision A (May 2020) to Revision B (June 2023)
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
REF | 5 | Input | Reference input. This pin must be driven by low impedance or connected to ground. |
RG | 1, 8 | — | Gain setting pins. For gains greater than 1, place a gain resistor between pins 1 and 8. |
V+ | 7 | — | Positive supply |
V– | 4 | — | Negative supply |
VIN+ | 3 | Input | Positive input |
VIN– | 2 | Input | Negative input |
VOUT | 6 | Output | Output |