Part A
AD8130AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9295 PCS
- Series
- Linear - Amplifiers - Instrumentation, Op Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD8138AR and AD8130AR are not drop-in replacements for one another. Although both are differential amplifiers in the same SOIC-8 package, they differ fundamentally in amplifier architecture, signal bandwidth, and input/output characteristics, so substituting one for the other requires full circuit revalidation.
Different amplifier architecture
Different bandwidth class
Different input characteristics
Different output drive capability
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8138AR | AD8130AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Differential ADC Driver | Differential Receiver / Line Receiver | Defines the core function; the AD8138 drives ADCs while the AD8130 receives differential signals, so they are not direct substitutes. |
| -3 dB Bandwidth | 320 MHz | 270 MHz | Sets the maximum signal frequency the part can pass with acceptable gain, affecting high-speed signal fidelity. |
| Slew Rate | 1150 V/µs | 1090 V/µs | Determines how fast the output can respond to large signal swings, critical for fast transient and pulse applications. |
| Input Voltage Noise | 5 nV/√Hz | 13 nV/√Hz | Lower noise improves signal-to-noise ratio in sensitive front-end and measurement circuits. |
| Supply Voltage Range | ±1.4 V to ±5.5 V (2.8 V to 11 V) | ±4.5 V to ±12.6 V (9 V to 25.2 V) | Determines compatibility with the system power rails; the two parts operate over very different supply windows. |
| Supply Current per Amplifier | ~19 mA | ~11 mA | Affects power budget and thermal design, especially in multi-channel or portable systems. |
| Output Configuration | Differential output | Single-ended output | Determines whether the device can directly drive differential loads such as ADCs or must feed single-ended downstream stages. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same footprint allows board-level interchangeability, though electrical differences still prevent direct substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts suit industrial temperature environments; identical range means no thermal derating difference. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8130AR | AD8138AR |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Base Product Number | AD8130 | - |
| Amplifier Type | Differential | - |
| Number of Circuits | 1 | - |
| Slew Rate | 1100V/µs | - |
| Current - Input Bias | 500 nA | - |
| Voltage - Input Offset | 400 µV | - |
| Supply Current | 13mA | - |
| Voltage - Supply Span (Min) | 4.5 V | - |
| Voltage - Supply Span (Max) | 25.2 V | - |
| Operating Temperature | -40°C ~ 85°C | - |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tube | - |
| -3 dB Bandwidth | 290 MHz | - |
| Current - Output / Channel | 40 mA | - |
| Type | - | ADC Driver |
| Applications | - | Data Acquisition |
Frequently asked questions
What are the primary functional differences between the AD8138AR and AD8130AR?
The AD8138AR is a differential ADC driver amplifier, while the AD8130AR is a high-speed differential receiver amplifier. The AD8138AR is optimized to drive differential inputs of ADCs with adjustable output common-mode voltage, whereas the AD8130AR is designed as a differential-to-single-ended receiver with a fixed gain of 1 and high common-mode rejection.
Are the AD8138AR and AD8130AR pin-compatible?
No. Both devices are offered in 8-lead SOIC packages, but their pin functions differ. The AD8138AR provides differential outputs and a VOCM pin for setting output common-mode voltage, while the AD8130AR provides a single-ended output and does not have a VOCM pin. Therefore, they are not direct drop-in replacements for each other.
What are the key AC specifications of the AD8138AR?
The AD8138AR offers a -3 dB bandwidth of 320 MHz and a slew rate of 1150 V/µs. It also features low harmonic distortion, making it suitable for driving high-resolution ADCs in applications such as ultrasound and communications.
What are the key AC specifications of the AD8130AR?
The AD8130AR provides a -3 dB bandwidth of 270 MHz and a slew rate of 1090 V/µs. It is characterized by high common-mode rejection ratio (CMRR) and is optimized for receiving differential signals in twisted-pair and backplane applications.
Can the AD8138AR and AD8130AR operate on the same supply voltages?
Yes. Both devices support dual supplies of ±5 V and single supplies of +5 V. However, the AD8138AR also supports a +3 V single supply, while the AD8130AR is specified for +5 V and ±5 V operation. Designers should verify the supply range against the respective datasheet for the target application.
Which device is better suited for driving an ADC?
The AD8138AR is specifically designed as a differential ADC driver. It provides differential outputs, adjustable output common-mode voltage via the VOCM pin, and low distortion, which are essential for interfacing with differential-input ADCs. The AD8130AR, being a receiver with a single-ended output, is not intended for ADC driving.
Which device is better suited for receiving differential signals over twisted-pair cable?
The AD8130AR is optimized for this role. Its high CMRR and differential input architecture make it suitable for receiving differential signals in twisted-pair and backplane environments, converting them to a single-ended output. The AD8138AR is not designed as a receiver and lacks the same common-mode rejection performance for this application.
Do both devices share the same operating temperature range?
Both the AD8138AR and AD8130AR are specified for the industrial temperature range of -40°C to +85°C. This should be confirmed against the latest manufacturer datasheet for the specific grade and package.