Part A
AD8132ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6696 Stückzahl
- Package
- MSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8132ARMZ and AD8131ARM are both differential line drivers in the same 8-lead MSOP package, but they are not identical drop-in replacements. The AD8132ARMZ offers externally adjustable gain and a wider supply range, while the AD8131ARM is a fixed-gain device with a narrower supply window. Designers should validate gain configuration, supply headroom, and bandwidth requirements before substituting one for the other.
Gain Configuration
Validation required
Supply Voltage Range
Validation required
Package Type
High match
Bandwidth
Validation required
Parts at a glance
Part B
AD8131ARM
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5616 Stückzahl
- Package
- TSSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8132ARMZ | AD8131ARM | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 1 Driver, 0 Receivers | 1 Driver, 0 Receivers | Both are single differential drivers, so channel count is functionally equivalent for substitution. |
| -3dB Bandwidth | 350 MHz | 400 MHz | Bandwidth determines the maximum signal frequency the driver can pass with acceptable attenuation; the AD8131 offers slightly higher bandwidth. |
| Slew Rate | 1200 V/µs | 2000 V/µs | Slew rate limits how fast the output can change; the AD8131 supports faster large-signal transitions. |
| Supply Voltage Range | 2.7 V to 11 V (±1.35 V to ±5.5 V) | 2.7 V to 11 V (±1.35 V to ±5.5 V) | Both support the same supply range, allowing operation from common single or dual supplies. |
| Supply Current (per amplifier) | 10.7 mA typ | 11.5 mA typ | Quiescent current affects power budget; the AD8132 draws slightly less current. |
| Input Offset Voltage | 1 mV typ (max 7 mV) | 1 mV typ (max 7 mV) | Offset voltage impacts DC accuracy; both parts have comparable offset specifications. |
| Output Voltage Swing | Rail-to-rail output | Rail-to-rail output | Rail-to-rail output maximizes dynamic range on low supply voltages for both devices. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature range ensures equivalent environmental compatibility. |
| Package / Mounting | 8-Lead MSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Same package and footprint allow drop-in board replacement without layout changes. |
| Internal Gain Setting | External resistors (adjustable gain) | Fixed gain of 2 (internal resistors) | The AD8132 allows user-set gain via external resistors, while the AD8131 has a fixed gain of 2, which is a key functional difference affecting substitutability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8132ARMZ | AD8131ARM |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| Slew Rate | 1200V/µs | 2000V/µs |
| -3 dB Bandwidth | 360 MHz | 400 MHz |
| Current - Input Bias | 3 µA | 500 nA |
| Voltage - Input Offset | 1 mV | 1.5 mV |
| Supply Current | 12mA | 11.5mA |
| Current - Output / Channel | 70 mA | 60 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.8 V |
| Voltage - Supply Span(Max) | 11 V | 11 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 AD8132ARMZ and AD8131ARM?
The AD8132ARMZ is a high-speed differential amplifier with an adjustable gain set by external resistors and a typical -3 dB bandwidth of 350 MHz. The AD8131ARM is a fixed-gain differential amplifier with a gain of 2 and a typical -3 dB bandwidth of 400 MHz. The AD8132ARMZ offers design flexibility through external gain setting, while the AD8131ARM provides a fixed, factory-trimmed gain for simplified designs.
Are the AD8132ARMZ and AD8131ARM pin-compatible?
Both devices are offered in an 8-lead MSOP (RM) package. However, pin compatibility must be verified against the respective manufacturer datasheets, as the internal function and external component requirements (particularly for gain-setting resistors on the AD8132ARMZ) differ between the two parts.
What is the gain configuration of each device?
The AD8132ARMZ uses external feedback and gain resistors to set the differential gain, allowing user-defined gain values. The AD8131ARM has a fixed internal gain of 2, requiring no external gain-setting resistors. This makes the AD8131ARM simpler to use where a gain of 2 is acceptable.
How do the bandwidth specifications compare?
The AD8132ARMZ has a typical -3 dB bandwidth of 350 MHz, while the AD8131ARM has a typical -3 dB bandwidth of 400 MHz. Both are high-speed differential amplifiers suitable for driving ADCs and twisted-pair cables, but the AD8131ARM offers slightly higher bandwidth at its fixed gain of 2.
Can the AD8131ARM be used as a drop-in replacement for the AD8132ARMZ?
No, they are not direct drop-in replacements. The AD8132ARMZ requires external gain-setting resistors, whereas the AD8131ARM has a fixed gain of 2. Circuitry designed for the AD8132ARMZ would need to be re-evaluated for gain, feedback network, and stability when considering the AD8131ARM, and vice versa.
What are the typical applications for these differential amplifiers?
Both the AD8132ARMZ and AD8131ARM are commonly used for driving differential ADCs, converting single-ended signals to differential signals, and driving twisted-pair cables. The AD8132ARMZ is preferred where adjustable gain is needed, while the AD8131ARM suits applications requiring a fixed gain of 2 with minimal external component count.
Do both devices operate from the same supply voltage range?
Both the AD8132ARMZ and AD8131ARM operate from a single supply of +2.7 V to +11 V or dual supplies of ±1.35 V to ±5.5 V, as specified in their respective manufacturer datasheets. Designers should confirm the exact supply range and power dissipation for each part in the target application.