Part A
AD7982BRMZRL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4697 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7980BRMZRL7 and AD7982BRMZRL7 share the same 10-lead MSOP package, 16-bit SAR architecture, and identical pinout, making them strong functional replacement candidates. However, they differ in sample rate, analog input type, and reference configuration, so the AD7982BRMZRL7 is not a direct drop-in substitute for the AD7980BRMZRL7 without validating system-level requirements.
Sample Rate
Validation required
Analog Input Type
Not compatible
Package Type
High match
Reference Configuration
Validation required
Parts at a glance
Part B
AD7980BRMZRL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6477 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD7980BRMZRL7 | AD7982BRMZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 18 bit | Resolution determines the smallest signal change the ADC can resolve; an 18-bit part offers 4x finer quantization than a 16-bit part, affecting achievable dynamic range and precision. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum throughput defines the highest signal bandwidth that can be digitized; both parts support the same 1 MSPS conversion rate. |
| Input Type | Pseudo-differential (single-ended) | Fully differential | Input topology dictates how the sensor or signal source must be interfaced; a fully differential input rejects common-mode noise and suits differential sensors, while pseudo-differential suits single-ended sources. |
| Analog Input Range | 0 V to VREF (single-ended) | ±VREF (differential) | The input span determines the signal amplitude the ADC can accept without external conditioning; the differential part accepts bipolar swings while the pseudo-differential part accepts unipolar swings. |
| SNR (typical) | 91.5 dB | 98 dB | Signal-to-noise ratio indicates the usable dynamic range; the higher-resolution part provides roughly 6.5 dB better SNR, enabling detection of smaller signals. |
| INL (typical) | ±0.6 LSB | ±1.0 LSB | Integral nonlinearity measures deviation from an ideal transfer function; it affects absolute accuracy and is specified in LSBs, so the LSB size differs between the two resolutions. |
| Supply Voltage | 2.5 V (VDD), 2.5 V to 5 V (VIO) | 2.5 V (VDD), 2.5 V to 5 V (VIO) | Supply requirements determine power-rail compatibility; both parts share the same core and I/O supply ranges, simplifying board-level substitution. |
| Package | 10-lead MSOP | 10-lead MSOP | Package and pinout affect PCB footprint and layout; identical packages allow a drop-in layout change if the interface is compatible. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Digital interface compatibility determines whether the part can connect to the existing host controller without glue logic; both use the same serial protocol family. |
| Power Consumption (typical) | 4.0 mW at 1 MSPS | 7.0 mW at 1 MSPS | Power dissipation affects thermal budget and battery life; the higher-resolution part consumes more power at the same throughput. |
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 | AD7982BRMZRL7 | AD7980BRMZRL7 |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 18 | 16 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 1 | 1 |
| Input Type | 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 ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7980BRMZRL7 and AD7982BRMZRL7?
The AD7980BRMZRL7 is a 16-bit, 1 MSPS PulSAR ADC with a pseudo-differential input, while the AD7982BRMZRL7 is an 18-bit, 1 MSPS PulSAR ADC with a fully differential input. Both are pin-compatible in a 10-lead MSOP package and share the same 1 MSPS throughput, but they differ in resolution (16-bit vs 18-bit) and input configuration (pseudo-differential vs fully differential).
Are the AD7980BRMZRL7 and AD7982BRMZRL7 pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RM) package and share a common pinout, which allows board-level interchangeability. However, because the input architecture differs (pseudo-differential on the AD7980 vs fully differential on the AD7982), the analog front-end must be validated for the selected device.
Do both parts support the same 1 MSPS throughput?
Yes. Both the AD7980BRMZRL7 and AD7982BRMZRL7 are specified for a maximum throughput of 1 MSPS, using the same SPI-compatible serial interface and the same internal conversion timing architecture.
What is the resolution difference between the AD7980BRMZRL7 and AD7982BRMZRL7?
The AD7980BRMZRL7 provides 16-bit resolution, whereas the AD7982BRMZRL7 provides 18-bit resolution. The higher resolution of the AD7982 yields a lower LSB size and improved dynamic range for applications requiring finer quantization.
How do the analog input configurations differ between the two devices?
The AD7980BRMZRL7 uses a pseudo-differential input structure, where the negative input is typically tied to a reference level. The AD7982BRMZRL7 uses a fully differential input structure, which provides better common-mode rejection and is suited to differential signal chains such as those driven by differential amplifiers or transformers.
Can the AD7980BRMZRL7 and AD7982BRMZRL7 share the same reference and supply voltages?
Both devices operate from a single 2.5 V supply for the analog and digital core, with a separate VIO supply for the digital interface, and both use an external reference. The reference voltage range and supply requirements are similar, but the analog input span and full-scale range differ due to the input architecture, so the reference and front-end scaling must be verified for each device.
Which device should be selected for higher precision applications?
The AD7982BRMZRL7 should be selected when higher precision is required, as it offers 18-bit resolution versus 16-bit on the AD7980BRMZRL7. The AD7980BRMZRL7 is appropriate for 16-bit, 1 MSPS applications where a pseudo-differential input is sufficient.