Part A
AD7980BRMZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6477 PCS
- Package
- MSOP-10
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7980ARMZ and AD7980BRMZRL7 are functionally interchangeable 16-bit successive-approximation ADCs sharing identical resolution, package, pinout, and interface characteristics. The BRMZRL7 variant is supplied in tape-and-reel packaging with a tighter specified linearity grade, making it suitable as a direct functional substitute where reel-fed assembly and enhanced accuracy are acceptable. Designers should confirm the tighter INL specification and reel packaging align with their production and accuracy requirements before substituting.
Resolution and Architecture
High match
Package and Pinout
High match
Digital Interface
High match
Linearity Grade and Packaging
Validation required
Parts at a glance
Part B
AD7980ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4535 PCS
- Package
- MSOP-10
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7980ARMZ | AD7980BRMZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both parts provide the same 16-bit resolution, so conversion precision is identical. |
| Sampling Rate | 1 MSPS | 1 MSPS | Identical throughput means either part supports the same maximum sampling frequency. |
| Number of Inputs / Channels | 1 (single-ended) | 1 (single-ended) | Same single-channel architecture allows direct functional substitution in the signal chain. |
| Architecture | SAR | SAR | Both use successive-approximation register architecture, giving equivalent latency and no pipeline delay. |
| Supply Voltage (Analog & Digital) | 2.5 V (2.375 V to 2.625 V) | 2.5 V (2.375 V to 2.625 V) | Matching supply requirements mean the same power rail design works for either part. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Identical serial interface ensures the same host controller and firmware can drive either device. |
| Package / Mounting | 10-Lead MSOP, Surface Mount | 10-Lead MSOP, Surface Mount | Same package and footprint allow drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Equivalent temperature ratings mean both parts suit the same environmental conditions. |
| Packaging / Ordering Format | Tube | Tape & Reel (RL7) | Different packaging affects assembly line handling and inventory format, though the die is functionally the same. |
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 | AD7980BRMZRL7 | AD7980ARMZ |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential | Pseudo-Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.375V ~ 2.625V | 2.375V ~ 2.625V |
| Voltage - Supply, Digital | 2.375V ~ 2.625V | 2.375V ~ 2.625V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7980ARMZ and AD7980BRMZRL7?
Both are 16-bit, 1 MSPS PulSAR analog-to-digital converters from Analog Devices in a 10-lead MSOP package. The AD7980ARMZ is supplied in tube packaging, while the AD7980BRMZRL7 is supplied in 7-inch tape-and-reel packaging for automated assembly. The "B" grade designation indicates a tighter specification grade compared to the "A" grade, with the B grade offering improved linearity and accuracy specifications per the datasheet.
Are the AD7980ARMZ and AD7980BRMZRL7 pin-compatible?
Yes. Both devices share the same 10-lead MSOP (RM) package and identical pinout, so they are pin-compatible and can be used interchangeably on the same PCB footprint. The difference lies in specification grade and packaging format, not pin assignment.
What is the resolution and throughput of these AD7980 devices?
Both the AD7980ARMZ and AD7980BRMZRL7 are 16-bit successive-approximation register (SAR) ADCs with a maximum throughput of 1 MSPS. They operate from a single 2.5 V supply with a separate VIO supply for digital interface flexibility.
How do the A and B grades differ in accuracy specifications?
Per the Analog Devices datasheet, the B grade offers tighter specifications than the A grade, including improved integral nonlinearity (INL) and differential nonlinearity (DNL) limits, as well as tighter offset and gain error tolerances. Designers should consult the specific grade's datasheet table to confirm the exact limits for their application.
What interface do the AD7980ARMZ and AD7980BRMZRL7 support?
Both devices feature a SPI-compatible serial interface (CS, SCLK, SDO) that supports daisy-chain and busy-indicator modes. The interface is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic via the VIO supply pin.
Why would a designer choose the AD7980BRMZRL7 over the AD7980ARMZ?
The AD7980BRMZRL7 is typically selected when tighter accuracy specifications (B grade) are required and when tape-and-reel packaging is needed for high-volume automated pick-and-place assembly. The AD7980ARMZ is suited to lower-cost or prototype applications where the A-grade specifications are sufficient and tube packaging is acceptable.
Do both devices operate over the same temperature range?
Yes. Both the AD7980ARMZ and AD7980BRMZRL7 are specified over the industrial temperature range of −40°C to +85°C, as stated in the Analog Devices datasheet.