Part A
AD8220WARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5929 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8220WARMZ and AD8220ARMZ-RL are functionally equivalent JFET-input instrumentation amplifiers sharing the same core die, package, and electrical specifications; the AD8220WARMZ is the automotive-qualified variant while the AD8220ARMZ-RL is the standard industrial-grade tape-and-reel version. Selection between them should be driven by qualification requirements and packaging preference rather than by electrical performance.
Amplifier Core Specifications
High match
Package and Pinout
High match
Operating Temperature Range
High match
Qualification and Screening
Validation required
Parts at a glance
Part B
AD8220ARMZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3523 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8220WARMZ | AD8220ARMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Both are JFET-input instrumentation amplifiers, so the core signal-conditioning function is identical. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for direct board-level substitution. |
| Supply Voltage Range | ±2.25 V to ±18 V (4.5 V to 36 V single supply) | ±2.25 V to ±18 V (4.5 V to 36 V single supply) | Identical supply range ensures the part operates in the same power environment. |
| Gain Range | 1 to 1000 (set by external resistor) | 1 to 1000 (set by external resistor) | Matching gain capability preserves the same signal scaling behavior in the circuit. |
| Input Offset Voltage (max) | 250 µV | 250 µV | Offset voltage directly affects DC accuracy; identical values mean equivalent precision. |
| Input Bias Current (typ) | 10 pA | 10 pA | Low JFET bias current is critical for high-impedance sensor interfaces; matching values preserve performance. |
| Gain Bandwidth Product | 1.5 MHz (G = 1) | 1.5 MHz (G = 1) | Bandwidth determines the maximum signal frequency the amplifier can handle accurately. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The W-grade extends to +125 °C, so it can replace the standard grade in higher-temperature environments but not vice versa. |
| Package / Mounting | 8-Lead MSOP (surface mount) | 8-Lead MSOP (surface mount) | Identical package and footprint allow drop-in replacement on the same PCB land pattern. |
| Qualification / Grade | Automotive qualified (W grade) | Industrial standard grade | The W grade carries automotive qualification and wider temperature rating, which is the key differentiator between these two orderable parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8220WARMZ | AD8220ARMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 2V/µs | 2V/µs |
| -3 dB Bandwidth | 1.5 MHz | 1.5 MHz |
| Current - Input Bias | 25 pA | 25 pA |
| Voltage - Input Offset | 250 µV | 250 µV |
| Supply Current | 750µA | 750µA |
| Current - Output / Channel | 15 mA | 15 mA |
| Voltage - Supply Span(Min) | 4.5 V | 4.5 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | Automotive | - |
Frequently asked questions
What are the key differences between the AD8220WARMZ and the AD8220ARMZ-RL?
Both parts are JFET-input instrumentation amplifiers in an 8-lead MSOP (RM-8) package and share the same core electrical specifications, including a typical supply current of 750 µA, a gain bandwidth of 1.5 MHz (G = 1), and a CMRR of 100 dB (G = 10). The primary differences are the temperature grade and packaging format: the AD8220WARMZ is the automotive-grade W version specified over the −40 °C to +125 °C temperature range, while the AD8220ARMZ-RL is the standard A-grade version specified over −40 °C to +85 °C and supplied in a 13-inch reel (RL) for automated assembly.
Are the AD8220WARMZ and AD8220ARMZ-RL pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RM-8) package with an identical pinout, so they are pin-compatible and share the same PCB land pattern. Electrical and thermal validation should still be performed for the target application before substitution.
What is the difference in operating temperature range between the two parts?
The AD8220WARMZ is specified for the −40 °C to +125 °C temperature range, making it suitable for automotive and high-temperature industrial applications. The AD8220ARMZ-RL is specified for the −40 °C to +85 °C range. Designs that must operate above +85 °C should use the W-grade device.
What does the "RL" suffix on the AD8220ARMZ-RL indicate?
The "RL" suffix denotes a reeled packaging option. The AD8220ARMZ-RL is supplied in a 13-inch tape-and-reel format for high-volume automated pick-and-place assembly, whereas the AD8220WARMZ is supplied in standard tube packaging.
Do the AD8220WARMZ and AD8220ARMZ-RL have the same electrical performance?
Yes. Both devices are based on the same AD8220 JFET-input instrumentation amplifier core and share the same datasheet typical and maximum limits, including 750 µA typical supply current, 1.5 MHz gain bandwidth, 100 dB CMRR at G = 10, and 14 nV/√Hz input voltage noise at 1 kHz. The W-grade part is additionally characterized and guaranteed over the extended −40 °C to +125 °C range.
Can the AD8220ARMZ-RL be used as a drop-in replacement for the AD8220WARMZ?
Electrically and mechanically the two parts are interchangeable in the same MSOP footprint. However, the AD8220ARMZ-RL is only guaranteed to +85 °C, so it should not replace the W-grade part in applications that require operation or storage above +85 °C. Substitution should be validated against the target design's temperature and reliability requirements.
Which part should be selected for automotive or high-temperature designs?
The AD8220WARMZ should be selected for automotive and high-temperature designs because it is specified over the −40 °C to +125 °C range. The AD8220ARMZ-RL is intended for standard industrial applications within −40 °C to +85 °C and for reeled high-volume assembly.