Part A
AD8236ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3436 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8237ARMZ and AD8236ARMZ are both zero-drift instrumentation amplifiers in the same 8-lead MSOP package, but they differ in supply voltage range, quiescent current, and gain configuration. The AD8237ARMZ supports a wider supply range and lower quiescent current, while the AD8236ARMZ offers a fixed gain of 50 with a narrower supply window. Designers should validate supply headroom and gain requirements before substituting one for the other.
Supply Voltage Range
Validation required
Gain Configuration
Validation required
Package Type
High match
Quiescent Current
Validation required
Parts at a glance
Part B
AD8237ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3399 PCS
- Package
- MSOP-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 | AD8237ARMZ | AD8236ARMZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation amplifier (indirect current feedback) | Instrumentation amplifier (micropower, zero-drift) | The architecture determines noise, bandwidth, and input behavior, affecting whether the part is a functional drop-in for a given signal chain. |
| Number of Channels | 1 | 1 | Channel count must match the circuit topology; both are single-channel, so this is not a differentiator. |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | Compatible supply ranges allow the parts to operate in the same low-voltage systems without rail changes. |
| Input Offset Voltage (max) | ±75 µV | ±250 µV | Lower offset improves DC accuracy; a larger offset may require calibration or affect precision measurements. |
| Input Offset Voltage Drift | 0.3 µV/°C (typ) | 0.05 µV/°C (typ) | Drift determines stability over temperature; the zero-drift AD8236 offers better long-term precision. |
| Gain Bandwidth Product | 1.5 MHz | 23 kHz | Bandwidth limits the maximum signal frequency; the AD8237 supports much higher-frequency signals than the AD8236. |
| Supply Current per Amplifier | 130 µA (typ) | 28 µA (typ) | Quiescent current affects battery life and power budget; the AD8236 is significantly more power-efficient. |
| Input Voltage Noise Density | 68 nV/√Hz (at 1 kHz) | 95 nV/√Hz (at 1 kHz) | Lower noise improves signal-to-noise ratio for small signals; the AD8237 is quieter at typical frequencies. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings mean both suit the same industrial and automotive environments. |
| Package | 8-lead MSOP | 8-lead MSOP | Same package and pinout enable direct PCB substitution without layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8236ARMZ | AD8237ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.011V/µs | 0.15V/µs |
| -3 dB Bandwidth | 23 kHz | 200 kHz |
| Current - Input Bias | 1 pA | 250 pA |
| Voltage - Input Offset | 3.5 mV | 25 µV |
| Supply Current | 33µA | 115µA |
| Current - Output / Channel | 6 mA | 4 mA |
| Voltage - Supply Span(Min) | 1.8 V | 1.8 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8237ARMZ and AD8236ARMZ?
The AD8237ARMZ is a micropower, zero-drift, rail-to-rail instrumentation amplifier with a gain set by two external resistors, while the AD8236ARMZ is a micropower instrumentation amplifier with a fixed gain of 51. The AD8237ARMZ offers flexible gain configuration and a wide supply range of 1.8 V to 5.5 V, whereas the AD8236ARMZ provides a fixed gain of 51 with a supply range of 1.8 V to 5.5 V. Both are offered in 8-lead MSOP (RMZ) packages.
Are the AD8237ARMZ and AD8236ARMZ pin-compatible?
Both devices are packaged in an 8-lead MSOP (RMZ) and share a similar pinout, but they are not functionally interchangeable without design review. The AD8237ARMZ uses external resistors to set gain, while the AD8236ARMZ has a fixed gain of 51, so the pin functions and external component requirements differ. Always verify pin assignments against the respective manufacturer datasheets before substitution.
What is the gain configuration of each device?
The AD8237ARMZ is a resistor-programmable instrumentation amplifier whose gain is set by two external resistors, allowing flexible gain selection. The AD8236ARMZ is a fixed-gain instrumentation amplifier with a gain of 51, requiring no external gain resistors.
What are the supply voltage ranges for the AD8237ARMZ and AD8236ARMZ?
Both the AD8237ARMZ and AD8236ARMZ operate from a single supply range of 1.8 V to 5.5 V, making them suitable for low-voltage, battery-powered signal conditioning applications.
How do the quiescent supply currents compare?
Both devices are micropower instrumentation amplifiers designed for low-power operation. The AD8237ARMZ and AD8236ARMZ both feature low quiescent supply current suitable for portable and battery-powered applications. Consult the respective manufacturer datasheets for exact quiescent current specifications under specific operating conditions.
Which device is better suited for applications requiring adjustable gain?
The AD8237ARMZ is better suited for applications requiring adjustable gain because its gain is set by two external resistors, allowing the designer to select the gain. The AD8236ARMZ has a fixed gain of 51 and is intended for applications where that fixed gain is appropriate.
Do both devices support rail-to-rail input and output operation?
The AD8237ARMZ features rail-to-rail input and output operation. The AD8236ARMZ is a micropower instrumentation amplifier; designers should verify the exact input and output swing specifications in the manufacturer datasheet for the intended operating conditions before assuming rail-to-rail performance.
What package type do the AD8237ARMZ and AD8236ARMZ use?
Both the AD8237ARMZ and AD8236ARMZ are supplied in an 8-lead MSOP package, indicated by the RMZ suffix in the part number.