Part A
AD7982BRMZRL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4697 PCS
- Package
- MSOP-10
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7980ARMZRL7 and AD7982BRMZRL7 are both 18-bit successive-approximation ADCs from Analog Devices in a 10-lead MSOP package, sharing a compatible serial interface and supply architecture, so the AD7982BRMZRL7 can serve as a functional replacement candidate for the AD7980ARMZRL7 in many designs. However, the two parts differ in sample rate, analog input configuration, and reference arrangement, so the replacement must be validated against the target application's timing, signal-conditioning, and reference requirements before adoption.
Sample Rate
Validation required
Analog Input Configuration
Validation required
Package Type
High match
Digital Interface
High match
Parts at a glance
Part B
AD7980ARMZRL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4200 PCS
- Package
- MSOP-10
- Series
- Data Acquisition - Analog to Digital Converters (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 | AD7980ARMZRL7 | AD7982BRMZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 18 bit | Higher resolution provides finer quantization and lower quantization noise, directly affecting achievable dynamic range and measurement precision. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum throughput determines how fast the system can acquire samples; both parts support the same 1 MSPS conversion rate. |
| Input Type | Pseudo-differential (single-ended) | Fully differential | Input topology affects signal conditioning requirements, common-mode rejection, and whether the ADC can interface directly with differential or single-ended front ends. |
| Analog Supply Voltage | 2.5 V | 5 V | Supply voltage must match the board's power rails and affects input range, power dissipation, and interface levels. |
| Input Voltage Range | 0 V to VREF (2.5 V to 5 V) | 0 V to VREF (differential, ±VREF) | The input span determines the full-scale signal the ADC can digitize and must be compatible with the sensor or amplifier output swing. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Serial interface compatibility ensures the ADC can connect to the host controller without additional glue logic. |
| Package | 10-Lead MSOP | 10-Lead MSOP | Package footprint and pinout determine whether the parts are drop-in compatible on an existing PCB layout. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range must cover the application's environmental conditions for reliable operation. |
| Power Consumption | ~4 mW at 1 MSPS (2.5 V) | ~15 mW at 1 MSPS (5 V) | Power dissipation impacts thermal design and battery life in portable or power-sensitive systems. |
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 | AD7980ARMZRL7 |
|---|---|---|
| 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 AD7980ARMZRL7 and the AD7982BRMZRL7?
The AD7980ARMZRL7 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 the same 10-lead MSOP package and operate from a 2.5 V supply with a separate VIO supply, but they differ in resolution, input configuration, and specified performance grades.
Are the AD7980ARMZRL7 and AD7982BRMZRL7 pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RM) package with the same pinout, which allows a common PCB footprint. However, pin compatibility does not guarantee functional interchangeability because resolution, input structure, and interface timing differ.
What is the resolution and throughput of each device?
The AD7980ARMZRL7 provides 16-bit resolution at up to 1 MSPS. The AD7982BRMZRL7 provides 18-bit resolution at up to 1 MSPS. Both use a successive-approximation register (SAR) architecture with an internal track-and-hold and no pipeline delay.
How do the analog input configurations differ?
The AD7980ARMZRL7 has a pseudo-differential input that accepts a single-ended signal referenced to a common-mode voltage. The AD7982BRMZRL7 has a fully differential input, which requires complementary signals on IN+ and IN- and typically provides better common-mode rejection and lower even-order distortion.
What supply voltages and reference requirements apply to both parts?
Both devices operate from a 2.5 V analog supply (VDD) and a separate digital I/O supply (VIO) that can range from 1.8 V to 5 V, allowing direct interfacing to various logic levels. Both require an external reference; the reference voltage sets the full-scale input range and must be supplied externally.
What digital interface do these ADCs use?
Both the AD7980ARMZRL7 and AD7982BRMZRL7 use a SPI-compatible serial interface with a dedicated CNV conversion input and SDO data output. The interface supports daisy-chain and busy-indicator modes, and both devices are compatible with 1.8 V to 5 V logic supplies via VIO.
Can the AD7980ARMZRL7 be used as a drop-in replacement for the AD7982BRMZRL7 in an existing design?
Not without validation. Although the package and pinout match, the AD7980ARMZRL7 is 16-bit with a pseudo-differential input, whereas the AD7982BRMZRL7 is 18-bit with a fully differential input. Resolution, input drive requirements, reference scaling, and output data format differ, so the system firmware, analog front end, and accuracy budget must be re-verified against the manufacturer datasheets before substitution.
What are the operating temperature ranges and package options for these devices?
Both the AD7980ARMZRL7 and AD7982BRMZRL7 are specified over the industrial temperature range of -40°C to +85°C and are supplied in the 10-lead MSOP package. The suffix "RL7" indicates tape-and-reel packaging in 7-inch reels.