Product Details
●The AD8222 is a dual-channel, high performance instrumentation amplifier that requires only one external resistor per amplifier to set gains of 1 to 10,000.
●The AD8222 is the first dual-instrumentation amplifier in the small 4 mm × 4mm LFCSP. It requires the same board area as a typical single instrumentation amplifier. The smaller package allows a 2× increase in channel density and a lower cost per channel, all with no compromise in performance.
●The AD8222 can also be configured as a single-channel, differential output instrumentation amplifier. Differential outputs provide high noise immunity, which can be useful when the output signal must travel through a noisy environment, such as with remote sensors. The configuration can also be used to drive differential input analog-to-digital converters (ADCs). The AD8222 maintains a minimum CMRR of 80 dB to 4 kHz for all grades at G = 1. High CMRR over frequency allows the AD8222 to reject wideband interference and line harmonics, greatly simplifying filter requirements. The AD8222 also has a typical CMRR drift over temperature of just 0.07 µV/V/°C at G = 1.
●The AD8222 operates on both single and dual supplies and only requires 2.2 mA maximum supply current for both amplifiers. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant.
●For a single-channel version, see the AD8221.
●Applications
● Multichannel data acquisition for
● ECG and medical instrumentation
● Industrial process controls
● Wheatstone bridge sensors
● Differential drives for
● High resolution input ADCs
● Remote sensors
●### Features and Benefits
● Two channels in small 4 mm × 4 mm LFCSP
● Gain set with 1 resistor per amplifier (G = 1 to 10,000)
● Low noise
● 8 nV/√Hz at 1 kHz
● 0.25 µV p-p (0.1 Hz to 10 Hz)
● High accuracy dc performance (B grade)
● 60 µV maximum input offset voltage
● 0.3 µV/°C maximum input offset drift
● 1.0 nA maximum input bias current
● 126 dB minimum CMRR (G = 100)
● Excellent ac performance
● 140 kHz bandwidth (G = 100)
● 13 µs settling time to 0.001%
● Differential output option (single channel)
● Fully specified
● Adjustable common-mode output
● Supply range: ±2.3 V to ±18 V
