The AD8220 is the first single-supply, JFET input instrumentation amplifier available in an MSOP package. Designed to meet the needs of high performance, portable instrumentation, the AD8220 has a minimum common-mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 5 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial temperature range. Despite the JFET inputs, the AD8220 typically has a noise corner of only 10 Hz.
With the proliferation of mixed-signal processing, the number of power supplies required in each system has grown. The AD8220 is designed to alleviate this problem. The AD8220 can operate on a ±18 V dual supply, as well as on a single +5 V supply. Its rail-to-rail output stage maximizes dynamic range on the low voltage supplies common in portable applications. Its ability to run on a single 5 V supply eliminates the need to use higher voltage, dual supplies. The AD8220 draws a maximum of 750 μA of quiescent current, making it ideal for battery powered devices.
Gain is set from 1 to 1000 with a single resistor. Increasing the gain increases the common-mode rejection. Measurements that need higher CMRR when reading small signals benefit when the AD8220 is set for large gains.
A reference pin allows the user to offset the output voltage. This feature is useful when interfacing with analog-to-digital converters.
The AD8220 is available in an MSOP that takes roughly half the board area of an SOIC. Performance for the A and B grade is specified over the industrial temperature range of −40°C to +85°C, and the W grade is specified over the automotive temperature range of −40°C to +125°C.
Features and Benefits100 dB CMRR min, G = 10 (B grade) 80 dB CMRR min to 5 kHz, G = 1 (B Grade) 1.5 MHz bandwidth (G = 1) 14 nV/√Hz input noise (1 kHz) Slew rate: 2 V/μs 750 μA quiescent supply current max 10 pA max input bias current (B grade) 0.6 pA max input offset current (B grade) MSOP package Rail-to-rail output Input voltage range to below negative supply rail 4 kV ESD protection 4.5 V to 36 V single supply ±2.25 V to ±18 V dual supply Gain set with single resistor (G = 1 to 1000) | AmplifiersSPICE Models |
| Document | note |
| AD8220: JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package Data Sheet (Rev. B) | PDF 803 kB |
| Document | note |
| UG-181: PLC Demo System, Industrial Process Control Demo System (Rev. A) | PDF 495.24 K |
| Document | note |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8224ACPZ-R7 Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 1500 | -40 to 85C | 0 | 4.17 | Y |
| AD8224ACPZ-RL Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 5000 | -40 to 85C | 0 | 4.17 | Y |
| AD8224ACPZ-WP Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 64 | -40 to 85C | 5 | 4.17 | Y |
| AD8224BCPZ-R7 Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 1500 | -40 to 85C | 0 | 6.77 | Y |
| AD8224BCPZ-RL Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 5000 | -40 to 85C | 0 | 6.77 | Y |
| AD8224BCPZ-WP Production | 16 ld LFCSP (4x4mm, 2.5mm exposed pad) | REEL 64 | -40 to 85C | 8.13 | 6.77 | Y |
| AD8224HACPZ-R7 Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 1500 | -40 to 85C | 5.1 | 4.27 | Y |
| AD8224HACPZ-RL Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 5000 | -40 to 85C | 5.1 | 4.27 | Y |
| AD8224HACPZ-WP Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 64 | -40 to 85C | 5.1 | 4.27 | Y |
| AD8224HBCPZ-R7 Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 1500 | -40 to 85C | 0 | 6.87 | Y |
| AD8224HBCPZ-RL Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 5000 | -40 to 85C | 0 | 6.87 | Y |
| AD8224HBCPZ-WP Production | 16 ld LFCSP (4x4x.85mm, no exposed pad) | REEL 64 | -40 to 85C | 8.23 | 6.87 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| AD8224-EVALZ | Evaluation Board | 70.79 | Y |
