INA128UA
The INA128UA is an electronic component. View the full INA128UA datasheet below including electrical characteristics, absolute maximum ratings.
Overview
Part: INA128, INA129 — Texas Instruments
Type: Precision, Low-Power Instrumentation Amplifier
Description: Low-power, general-purpose instrumentation amplifiers offering excellent accuracy. The versatile three op amp design provides wide bandwidth (200 kHz at G = 100) and allows gain from 1 to 10,000 to be set by a single external resistor.
Operating Conditions:
- Supply voltage: ±2.25 V to ±18 V
- Operating temperature: -40°C to +85°C
- Gain range: 1 to 10,000
Key Specs:
- Low offset voltage: 50 μV, maximum
- Low drift: 0.5 μV/°C, maximum
- Low input bias current: 5 nA, maximum
- Low noise: 8 nV/√Hz
- High CMR: 120 dB, minimum
- Bandwidth: 1.3 MHz (G = 1)
- Low quiescent current: 700 μA
- Inputs protected to ±40 V
Features:
- Low offset voltage: 50 μV, maximum
- Low drift: 0.5 μV/°C, maximum
- Low input bias current: 5 nA, maximum
- Low noise: 8 nV/√Hz, 0.2 μVpp
- High CMR: 120 dB, minimum
- Bandwidth: 1.3 MHz (G = 1)
- Inputs protected to ±40 V
- Wide supply range: ±2.25 V to ±18 V
- Low quiescent current: 700 μA
- Packages: 8-pin plastic DIP, SO-8
Applications:
- Pressure transmitter
- Temperature transmitter
- Weigh scale
- Electrocardiogram (ECG)
- Analog input module
- Data acquisition (DAQ)
Package:
- SOIC (8): 3.91 mm × 4.90 mm
- PDIP (8): 6.35 mm × 9.81 mm
Features
- ·
- Low offset voltage: 50 μV, maximum
- Low drift: 0.5 μV/°C, maximum
- Low input bias current: 5 nA, maximum
- Low noise: 8 nV/√Hz, 0.2 μVpp
- High CMR: 120 dB, minimum
- Bandwidth: 1.3 MHz (G = 1)
- Inputs protected to ±40 V
- Wide supply range: ±2.25 V to ±18 V
- Low quiescent current: 700 μA
- Packages: 8-pin plastic DIP, SO-8
Applications
Pin Configuration
Figure 6-1. D (8-Pin SOIC) and P (8-Pin PDIP) Packages, Top View
Table 6-1. Pin Functions
| PIN | PIN | TYPE |
|---|---|---|
| NAME | NO. | TYPE |
| REF | 5 | Input |
| R G | 1,8 | - |
| V- | 4 | Power |
| V+ | 7 | Power |
| V IN- | 2 | Input |
| V IN+ | 3 | Input |
| V O | 6 | Output |
Table 6-1. Pin Functions
Electrical Characteristics
at T A = 25°C, VS = ±15 V, RL = 10 kΩ, VREF = 0 V, VCM = VS / 2, and G = 1 (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | TEST CONDITIONS | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|---|---|
| INPUT | INPUT | INPUT | INPUT | INPUT | INPUT | INPUT | INPUT | INPUT |
| V OS | Offset voltage (RTI) | 1 ≤ G ≤ 10000 | INA12xP, INA12xU | INA12xP, INA12xU | ±10 ±100 / G | ±50 ±500 / G | μV | |
| V OS | Offset voltage (RTI) | 1 ≤ G ≤ 10000 | INA12xPA, INA12xUA | INA12xPA, INA12xUA | ±25 ±100 / G | ±125 ±1000 / G | μV | |
| Offset voltage drift (RTI) | T A = -40°C to +85°C | INA12xP, INA12xU | INA12xP, INA12xU | ±0.2 ±2 / G | ±0.5 ±20 / G | μV/°C | ||
| Offset voltage drift (RTI) | T A = -40°C to +85°C | INA12xPA, INA12xUA | INA12xPA, INA12xUA | ±0.2 ±5 / G | ±1 ±20 / G | μV/°C | ||
| PSRR | Power-supply rejection ratio (RTI) | V S = ±2.25 V to ±18 V | INA12xP, INA12xU | INA12xP, INA12xU | ±0.2 ±20 / G | ±1 ±100 / G | μV/V | |
| PSRR | Power-supply rejection ratio (RTI) Long-term stability | V S = ±2.25 V to ±18 V | INA12xPA, INA12xUA | INA12xPA, INA12xUA | ±0.2 ±3 / G | ±2 ±200 / G | μV/V μV/mo | |
| Input impedance | Differential | 10 \ | \ | 2 | ||||
| Input impedance | Common-mode | 100 \ | \ | 9 | ||||
| V CM | Common-mode voltage (2) Safe input voltage | V O = 0 V R S = 0 Ω | (V-) + 2 | (V+) - 2 ±40 | V V | |||
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 1 | INA12xP, INA12xU | 80 | 86 | dB | |
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 1 | INA12xPA, INA12xUA | 73 | dB | ||
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 10 | INA12xP, INA12xU | 100 | 106 | dB | |
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 10 | INA12xPA, INA12xUA | 93 | dB | ||
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 100 | INA12xP, INA12xU | 120 | 125 | dB | |
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 100 | INA12xPA, INA12xUA | 110 | dB | ||
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | INA12xP, INA12xU | 120 | 130 | dB | ||
| CMRR | Common-mode rejection ratio | ΔR S = 1 kΩ, V CM = ±13 V | G = 1000 | INA12xPA, INA12xUA | 110 | dB | ||
| INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT | INPUT BIAS CURRENT |
| Input bias current | INA12xP, INA12xU | ±2 | ±5 | nA | ||||
| I B | Input bias current Input bias current drift | INA12xPA, INA12xUA T A = -40°C to +85°C | ±30 | ±10 | nA pA/ °C | |||
| I OS | Input offset current | INA12xP, INA12xU | ±1 | ±5 | nA | |||
| I OS | Input offset current Input offset current drift | INA12xPA, INA12xUA T A = -40°C to +85°C | ±30 | ±10 | nA pA/ °C | |||
| NOISE | NOISE | NOISE | NOISE | NOISE | NOISE | NOISE | NOISE | NOISE |
| e N | Voltage noise (RTI) | G = 1000, R S = 0 Ω | f = 10 Hz | f = 10 Hz | 10 | nV/√Hz | ||
| e N | Voltage noise (RTI) | G = 1000, R S = 0 Ω | f = 100 Hz | f = 100 Hz | 8 | nV/√Hz | ||
| e N | Voltage noise (RTI) | G = 1000, R S = 0 Ω | f = 1 kHz | f = 1 kHz | 8 | nV/√Hz | ||
| e N | Voltage noise (RTI) | G = 1000, R S = 0 Ω | f B = 0.1 Hz to 10 Hz | f B = 0.1 Hz to 10 Hz | 0.2 | μV PP | ||
| I n | Current noise | f = 10 Hz | 0.9 | pA/√Hz | ||||
| I n | Current noise | f = 1 kHz | 0.3 | pA/√Hz | ||||
| I n | Current noise | f B = 0.1 Hz to 10 Hz | 30 | pA PP |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V S | Supply voltage | Dual supply, V S = (V+) - (V-) | ±18 | V | |
| V S | Single supply, V S = (V+) - 0 V | 36 | V | ||
| Analog input voltage Output short-circuit (2) | Continuous | ±40 | V | ||
| T A | Operating temperature | -40 | 125 | °C | |
| Junction temperature | 150 | °C | |||
| Lead temperature (soldering, 10 | s) | 300 | °C | ||
| T stg | Storage temperature | -55 | 125 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | TYP | MAX | UNIT | ||
|---|---|---|---|---|---|
| V S | Supply voltage | 4.5 | 30 | 36 | V |
| Input common-mode voltage range for V O = 0 V | ±2.25 (V-) + 2 | ±15 | ±18 (V+) - 2 | V | |
| T A | Specified temperature | -40 | 85 | °C |
Thermal Information
| INA12x | INA12x | ||
|---|---|---|---|
| THERMAL METRIC (1) | THERMAL METRIC (1) | D (SOIC) | P (PDIP) |
| 8 PINS | 8 PINS | ||
| R θJA | Junction-to-ambient thermal resistance | 110 | 46.1 |
| R θJC(top) | Junction-to-case (top) thermal resistance | 57 | 34.1 |
| R θJB | Junction-to-board thermal resistance | 54 | 23.4 |
| ψ JT | Junction-to-top characterization parameter | 11 | 11.3 |
| ψ JB | Junction-to-board characterization parameter | 53 | 23.2 |
Typical Application
The INA12x measure a small differential voltage with a high common-mode voltage developed between the noninverting and inverting input. The high input-voltage protection circuit in conjunction with high input impedance make the INA12x an excellent choice for a wide range of applications. The ability to set the reference pin to adjust the functionality of the output signal offers additional flexibility that is practical for multiple configurations.
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