Part A
AD8131ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6679 個数
- Package
- MSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8132ARMZ and AD8131ARMZ are both single-channel differential line drivers in the same 8-lead SOIC package, making them a viable functional replacement candidate. However, the AD8132ARMZ offers an externally adjustable gain and higher bandwidth, while the AD8131ARMZ is a fixed-gain device, so circuit-level validation of gain configuration and dynamic performance is required before substitution.
Package Type
High match
Channel Count
High match
Gain Configuration
Validation required
Bandwidth
Validation required
Parts at a glance
Part B
AD8132ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6696 個数
- Package
- MSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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 | AD8131ARMZ | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 1 Driver | 1 Driver | Both are single differential drivers, so channel count is equivalent for single-channel signal chain designs. |
| -3dB Bandwidth | 350 MHz | 400 MHz | Higher bandwidth supports faster signal edges and higher-frequency applications; the AD8131 offers slightly more headroom. |
| Slew Rate | 1200 V/µs | 2000 V/µs | Slew rate limits large-signal transient response; the AD8131 can drive faster large-signal swings. |
| 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) | Identical supply flexibility allows either part to fit the same power rail configuration. |
| Supply Current (per amplifier) | 10.7 mA typ | 11 mA typ | Quiescent current affects power budget; the values are close, so power impact is nearly equivalent. |
| Input Offset Voltage | 1 mV typ / 7 mV max | 1 mV typ / 7 mV max | Offset voltage impacts DC accuracy; matching specs means comparable DC performance. |
| Output Voltage Swing | ±3.5 V (on ±5 V supply) | ±3.5 V (on ±5 V supply) | Output swing determines dynamic range and headroom; identical swing supports equivalent signal amplitude capability. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same industrial temperature range means both are suitable for the same environmental conditions. |
| Package / Mounting | 8-Lead MSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Identical package and footprint allow drop-in PCB compatibility without layout changes. |
| Internal Gain Setting | External resistors (adjustable gain) | Fixed gain of 2 (internal resistors) | The AD8132 allows user-defined gain via external resistors, while the AD8131 is fixed at gain of 2; this is the most significant functional difference affecting substitutability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8131ARMZ | AD8132ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| Slew Rate | 2000V/µs | 1200V/µs |
| -3 dB Bandwidth | 400 MHz | 360 MHz |
| Current - Input Bias | 500 nA | 3 µA |
| Voltage - Input Offset | 1.5 mV | 1 mV |
| Supply Current | 11.5mA | 12mA |
| Current - Output / Channel | 60 mA | 70 mA |
| Voltage - Supply Span(Min) | 2.8 V | 2.7 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 AD8131ARMZ?
The AD8132ARMZ is a high-speed, low-cost differential amplifier with an adjustable gain set by external resistors and a typical -3 dB bandwidth of 350 MHz. The AD8131ARMZ is a fixed-gain (G = 2) differential amplifier with a typical -3 dB bandwidth of 400 MHz. The AD8132ARMZ offers user-configurable gain, while the AD8131ARMZ provides a fixed gain of 2 with internal resistors, reducing external component count.
Are the AD8132ARMZ and AD8131ARMZ pin-compatible in the same package?
Both devices are offered in an 8-lead MSOP (RMZ) package. However, pin functions differ: the AD8132ARMZ uses external feedback and gain-setting resistors connected to its pins, while the AD8131ARMZ has internal fixed-gain resistors and its pin assignments reflect that fixed configuration. Therefore, they are not directly pin-for-pin interchangeable without verifying the pin functions against the respective datasheets.
Can the AD8131ARMZ be used as a direct drop-in replacement for the AD8132ARMZ?
No. The AD8132ARMZ is an adjustable-gain amplifier requiring external resistors, whereas the AD8131ARMZ is a fixed-gain (G = 2) amplifier with internal resistors. A direct drop-in replacement is not possible because the gain configuration, external component requirements, and pin functions differ. Any substitution must be validated against both datasheets and the target design requirements.
What is the gain configuration of each device?
The AD8132ARMZ is an adjustable-gain differential amplifier whose gain is set by external feedback and gain resistors, allowing user-defined closed-loop gain. The AD8131ARMZ is a fixed-gain differential amplifier with a gain of 2 (G = 2) implemented with internal resistors, requiring no external gain-setting components.
How do the bandwidth specifications compare between the AD8132ARMZ and AD8131ARMZ?
Per the manufacturer datasheets, the AD8132ARMZ has a typical -3 dB bandwidth of 350 MHz, while the AD8131ARMZ has a typical -3 dB bandwidth of 400 MHz. Bandwidth for the AD8132ARMZ depends on the selected gain configuration, so the datasheet conditions should be consulted for the specific application.
Do both devices operate from the same supply voltage range?
Both the AD8132ARMZ and AD8131ARMZ are designed to operate from a single supply of +3 V to ±5 V (dual supplies of ±1.5 V to ±5 V), as specified in their respective manufacturer datasheets. Designers should confirm the exact supply range and conditions in the datasheet for the target application.
Which device is better suited for applications requiring a fixed gain of 2?
The AD8131ARMZ is specifically designed as a fixed-gain (G = 2) differential amplifier with internal resistors, making it well suited for applications requiring a fixed gain of 2 with minimal external component count. The AD8132ARMZ can also be configured for a gain of 2 using external resistors, but it offers adjustable gain flexibility rather than a fixed internal configuration.
What are the package and temperature range specifications for these devices?
Both the AD8132ARMZ and AD8131ARMZ are available in an 8-lead MSOP package (RMZ suffix) and are specified for the industrial temperature range of -40°C to +85°C, per the manufacturer datasheets. Designers should verify the exact package and temperature grade against the official datasheet for their specific orderable part number.