1 Features
• Low quiescent current: 175 μA/channel
• Wide supply range: ±1.35 V to ±18 V
• Low offset voltage: 250-μV maximum
• Low offset drift: 3-μV/°C maximum
• Low noise: 35 nV/√Hz
• Low input bias current: 25-nA maximum
• Temperature range: –40°C to +85°C
• Multiple package options:
– Single channel:
• INA126P/PA 8-pin PDIP (P)
• INA126U/UA 8-pin SOIC (D)
• INA126E/EA 8-pin VSSOP (DGK)
– Dual channels:
• INA2126P/PA 16-pin PDIP (N)
• INA2126U/UA 16-pin SOIC (D)
• INA2126E/EA 16-pin SSOP (DBQ)

2 Applications
• Level transmitter
• Flow transmitter
• Multiparameter patient monitor
• Mixed module (AI, AO, DI, DO)
• AC charging (pile) station
• Infusion pump
• Electrocardiogram (ECG)

3 Description
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.