Part A
AD8130ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2372 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The AD8130ARZ and AD8138AARZ are not drop-in replacements for one another. Although both are differential amplifiers in SOIC-8 packages, they differ fundamentally in architecture, signal path, and intended application: the AD8130ARZ is a high-speed differential receiver/line driver optimized for twisted-pair and cable reception, while the AD8138AARZ is a low-distortion differential ADC driver optimized for baseband and IF signal chains. Designers must validate gain configuration, output common-mode control, and board-level layout before considering any substitution.
Different amplifier architecture
Different signal path role
Different output common-mode control
Different bandwidth and slew performance
Parts at a glance
Part B
AD8138AARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6293 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8130ARZ | AD8138AARZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Differential Receiver / Amplifier | Differential ADC Driver | Defines the primary function; a receiver amplifier and an ADC driver are not directly interchangeable in most signal-chain designs. |
| -3 dB Bandwidth | 270 MHz | 320 MHz | Sets the maximum signal frequency the part can pass with acceptable gain; affects high-speed signal fidelity. |
| Slew Rate | 1090 V/µs | 1150 V/µs | Determines how fast the output can respond to large signal swings; critical for fast transients and high-frequency signals. |
| Input Voltage Noise | 13 nV/√Hz | 5 nV/√Hz | Lower noise improves signal-to-noise ratio; important for precision and low-level signal applications. |
| Supply Voltage Range | ±4.5 V to ±12.6 V (dual) | ±1.4 V to ±5.5 V (dual) | Determines compatibility with the system power rails; mismatched ranges can prevent direct substitution. |
| Supply Current (per amplifier) | 13 mA | 20 mA | Affects power budget and thermal design; higher current may require different decoupling or thermal management. |
| Output Current | 40 mA | 95 mA | Determines drive capability for loads such as ADC inputs or cables; insufficient drive can cause distortion. |
| Package / Pin Count | 8-Lead SOIC | 8-Lead SOIC | Same package and pin count allow board-level footprint compatibility, though pin functions must still be verified. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts support the same industrial temperature environment for reliable operation. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8130ARZ | AD8138AARZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Active |
| Type | - | ADC Driver |
| Applications | - | Data Acquisition |
| Mounting Type | Surface Mount | Surface Mount |
| Amplifier Type | Differential | - |
| Number of Circuits | 1 | - |
| Slew Rate | 1100V/µs | - |
| -3 dB Bandwidth | 290 MHz | - |
| Current - Input Bias | 500 nA | - |
| Voltage - Input Offset | 400 µV | - |
| Supply Current | 13mA | - |
| Current - Output / Channel | 40 mA | - |
| Voltage - Supply Span(Min) | 4.5 V | - |
| Voltage - Supply Span(Max) | 25.2 V | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the primary functional differences between the AD8130ARZ and AD8138AARZ?
The AD8130ARZ is a high-speed differential receiver (difference amplifier) with a fixed gain of 1, while the AD8138AARZ is a low distortion differential ADC driver (fully differential amplifier) with externally settable gain. The AD8130ARZ is optimized for receiving differential signals and converting them to single-ended, whereas the AD8138AARZ is optimized for driving differential inputs of high-resolution ADCs.
Are the AD8130ARZ and AD8138AARZ pin-compatible?
No. Both devices are offered in 8-lead SOIC packages, but their pin functions differ. The AD8130ARZ pinout includes a reference pin and a feedback pin for its fixed-gain architecture, while the AD8138AARZ pinout includes differential inputs, differential outputs, and a VOCM (common-mode voltage) pin. They are not direct drop-in replacements.
What are the key bandwidth specifications for each device?
The AD8130ARZ offers a -3 dB bandwidth of approximately 270 MHz (at G = 1). The AD8138AARZ offers a -3 dB bandwidth of approximately 320 MHz. Both are high-speed devices, but the AD8138AARZ provides slightly higher bandwidth suitable for driving fast ADCs.
Which device is better suited for driving a differential ADC?
The AD8138AARZ is specifically designed as a differential ADC driver. It provides differential outputs, an adjustable output common-mode voltage via the VOCM pin, and low harmonic distortion, making it the appropriate choice for driving differential ADC inputs. The AD8130ARZ is a differential receiver with a single-ended output and is not intended as an ADC driver.
How do the supply voltage requirements compare?
Both devices operate from dual supplies. The AD8130ARZ typically operates from ±5 V to ±12 V supplies. The AD8138AARZ typically operates from ±5 V supplies (or single +5 V with appropriate biasing). Designers should verify the exact supply range against the respective manufacturer datasheets for their specific operating conditions.
Can the AD8130ARZ be used to convert a differential signal to single-ended?
Yes. The AD8130ARZ is a differential receiver designed to convert a differential input signal to a single-ended output with a fixed gain of 1. This is its primary intended function, in contrast to the AD8138AARZ, which maintains a differential output.
What are the distortion performance differences between the two parts?
The AD8138AARZ is specified with low harmonic distortion (e.g., -94 dBc SFDR at 5 MHz) optimized for ADC driving applications. The AD8130ARZ also offers good distortion performance for a receiver, but its specifications are characterized for differential reception rather than ADC driving. Designers should consult the respective datasheets for distortion at their target frequency and gain.