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
Features and Benefits
| AmplifiersSPICE Models |
| Document | note |
| AD8222: Precision, Dual-Channel Instrumentation Amplifier Data Sheet (Rev. B) | PDF 517.11 K |
| Document | note |
| AN-282: Fundamentals of Sampled Data Systems | PDF 2131 kB |
| AN-683: Strain Gage Measurement Using an AC Excitation (Rev. A) | PDF 122.15 K |
| AN-671: Reducing RFI Rectification Errors in In-Amp Circuits | PDF 208 kB |
| Document | note |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8222ACPZ-R7 Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 1500 | -40 to 85C | 0 | 3.63 | Y |
| AD8222ACPZ-RL Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 5000 | -40 to 85C | 0 | 3.63 | Y |
| AD8222ACPZ-WP Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 64 | -40 to 85C | 4.36 | 3.63 | Y |
| AD8222BCPZ-R7 Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 1500 | -40 to 85C | 0 | 6.37 | Y |
| AD8222BCPZ-RL Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 5000 | -40 to 85C | 0 | 6.37 | Y |
| AD8222BCPZ-WP Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 64 | -40 to 85C | 7.64 | 6.37 | Y |
| AD8222HACPZ-R7 Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 1500 | -40 to 85C | 0 | 3.73 | Y |
| AD8222HACPZ-RL Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 5000 | -40 to 85C | 0 | 3.73 | Y |
| AD8222HACPZ-WP Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 64 | -40 to 85C | 4.46 | 3.73 | Y |
| AD8222HBCPZ-R7 Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 1500 | -40 to 85C | 0 | 6.47 | Y |
| AD8222HBCPZ-RL Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 5000 | -40 to 85C | 0 | 6.47 | Y |
| AD8222HBCPZ-WP Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 64 | -40 to 85C | 7.74 | 6.47 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| AD8222-EVALZ | Evaluation Board | 59.95 | Y |
