The INA126 and INA2126 (INAx126) are precision instrumentation amplifiers for accurate, low-noise, differential-signal acquisition. The two-op-amp design provides excellent performance with low quiescent current (175 μA/channel). These features combined with a wide operating voltage range of ±1.35 V to ±18 V make the INAx126 a great choice for portable instrumentation and data acquisition systems.
Gain can be set from 5 V/V to 10000 V/V with a single external resistor. Precision input circuitry provides low offset voltage (250 μV, maximum), low offset voltage drift (3 μV/°C, maximum), and excellent common-mode rejection.
All versions are specified for the –40°C to +85°C industrial temperature range.
PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|---|---|
INA126 | PDIP (8) | 6.35 mm × 9.81 mm |
SOIC (8) | 3.91 mm × 4.90 mm | |
VSSOP (8) | 3.00 mm × 3.00 mm | |
INA2126 | PDIP (16) | 6.35 mm × 19.30 mm |
SOIC (16) | 3.91 mm × 9.90 mm | |
SSOP (16) | 3.90 mm × 4.90 mm |
Changes from Revision B (December 2015) to Revision C (December 2021)
Changes from Revision A (August 2005) to Revision B (December 2015)
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1, 8 | RG | — | Gain setting pin. For gains greater than 5 place a gain resistor between pin 1 and pin 8. |
2 | V–IN | I | Negative input |
3 | V+IN | I | Positive input |
4 | V– | — | Negative supply |
5 | Ref | I | Reference input. This pin must be driven by a low impedance or connected to ground. |
6 | VO | O | Output |
7 | V+ | — | Positive supply |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | V–INA | I | Negative input for amplifier A |
2 | V+INA | I | Positive input for amplifier A |
3, 4 | RGA | — | Gain setting pin for amplifier A. For gains greater than 5 place a gain resistor between pin 3 and pin 4. |
5 | RefA | I | Reference input for amplifier A. This pin must be driven by a low impedance or connected to ground. |
6 | VOA | O | Output of amplifier A |
7 | SenseA | I | Feedback for amplifier A. Connect to VOA, amplifier A output. |
8 | V– | — | Negative supply |
9 | V+ | — | Positive supply |
10 | SenseB | I | Feedback for amplifier B. Connect to VOB, amplifier B output. |
11 | VOB | O | Output of amplifier B |
12 | RefB | I | Reference input for amplifier B. This pin must be driven by a low impedance or connected to ground. |
13, 14 | RGB | — | Gain setting pin for amplifier B. For gains greater than 5 place a gain resistor between pin 13 and pin 14. |
15 | V+INB | I | Positive input for amplifier B |
16 | V–INB | I | Negative input for amplifier B |