SBOA503 July 2021 INA101 , INA103 , INA111 , INA114 , INA115 , INA118 , INA121 , INA122 , INA125 , INA126 , INA128 , INA128-HT , INA129 , INA129-EP , INA129-HT , INA141 , INA155 , INA156 , INA1620 , INA163 , INA1650 , INA166 , INA188 , INA2126 , INA2128 , INA2141 , INA217 , INA2321 , INA2331 , INA2332 , INA317 , INA321 , INA322 , INA326 , INA327 , INA330 , INA331 , INA332 , INA333 , INA333-HT , INA333-Q1 , INA337 , INA338 , INA818 , INA819 , INA821 , INA823 , INA826 , INA826S , INA827 , INA828 , INA848 , INA849
Many applications that require low-level ac signal processing in the presence of large dc potentials require special additional circuitry. Simple mistakes while building the circuit can cause large errors and unexpected outputs. Providing a dc path to ground in dc or ac applications is a necessary step in circuit design. Properly designing these circuits requires an understanding of the sensor output impedance or the output impedance of the circuit driving the instrumentation amplifier, as well as the trade-offs in component selection.
See Table 7-1 for a list of some of TI’s high-precision low-Ib instrumentation amplifiers.
| Part Number | Description |
|---|---|
| INA849 | Ultra-low-noise (1 nV/√Hz), wide-bandwidth (28 MHz), high-precision (35 µV), super-beta, 36‑V IA with low input bias current (20 nA, maximum) |
| INA823 | Low-power (250 µA), wide-supply (2.7 V to 36 V), precision, (150 µV), super-beta IA with low input bias current (15 nA), overvoltage protection, and below ground input voltage |
| INA821 | Wide-bandwidth (4.7 MHz), low-noise (7 nV/√Hz), high-precision (35 µV), super-beta, 36‑V IA with low input bias current (0.5 nA, maximum) and overvoltage protection |
| INA819 | Low-power (350 µA), low-noise (8 nV/√Hz), high-precision (35 µV), super-beta, 36‑V IA with low input bias current (0.5 nA, maximum) and overvoltage protection (alternative pinout available: INA818) |
| INA188 | Zero-drift (0.2 µV/°C, 55 µV), low-noise (12 nV/√Hz), 36‑V, CMOS IA with low input bias current (2.5 nA, maximum) |
| INA333 | Micro-power (50 µA), zero-drift (0.1 µV/°C, 25 µV), 5.5‑V CMOS IA with low input bias current (0.2 nA, maximum) |
| INA331 |
Very-low-bias-current (10 pA, maximum), low-power (0.01 µA with shutdown), low-current-noise (0.5 fA/√Hz), 5.5‑V CMOS IA |
| INA121 | Very-low-bias (50 pA, maximum), low-current-noise (1 fA/√Hz), 36‑V, FET-input IA with overvoltage protection |