Part A
AD7988-5BRMZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 6169 PCS
- Package
- MSOP-10
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7988-5BRMZ is a strong functional replacement candidate for the AD7980ARMZ, sharing the same 16-bit SAR architecture, 10-lead MSOP package, and SPI-compatible serial interface. Designers should validate the reduced 500 kSPS throughput and narrower digital supply range against system timing and I/O voltage requirements before substituting in existing designs.
Resolution and Architecture
High match
Sample Rate
Validation required
Package and Pinout
High match
Digital Supply Voltage
Validation required
Parts at a glance
Part B
AD7980ARMZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 4535 PCS
- Package
- MSOP-10
- Series
- 데이터 수집 - 아날로그 변환기(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 | AD7988-5BRMZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so resolution is identical and does not affect substitutability. |
| Sampling Rate | 1 MSPS | 500 kSPS | The AD7980 offers twice the throughput, which matters for higher-bandwidth signal acquisition. |
| Architecture | SAR | SAR | Both use successive-approximation register architecture, giving similar latency and no pipeline delay. |
| Input Type | Pseudo-differential | Pseudo-differential | Matching input configuration allows similar analog front-end design without reworking the signal chain. |
| Supply Voltage (Analog) | 2.5 V | 2.5 V | Identical analog supply simplifies power rail reuse when substituting parts. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Same serial interface means the digital host connection can remain unchanged. |
| Package | 10-lead MSOP | 10-lead MSOP | Identical package footprint allows drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same industrial temperature range supports use in equivalent environments. |
| Power Consumption | ~4.0 mW at 1 MSPS | ~3.0 mW at 500 kSPS | Lower power in the AD7988-5 benefits battery-powered or thermally constrained designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7988-5BRMZ | AD7980ARMZ |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 500k | 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 AD7988-5BRMZ?
The AD7980ARMZ is a 16-bit, 1 MSPS PulSAR ADC, while the AD7988-5BRMZ is a 16-bit, 500 kSPS PulSAR ADC. Both are pin-compatible in a 10-lead MSOP package and share the same serial interface, but the AD7980 offers twice the throughput of the AD7988-5. The AD7988-5 is optimized for lower power operation at reduced sample rates.
Are the AD7980ARMZ and AD7988-5BRMZ pin-compatible?
Yes. Both devices are offered in a 10-lead MSOP (RMZ) package with the same pinout, allowing the AD7988-5BRMZ to be used as a drop-in replacement for the AD7980ARMZ when the lower 500 kSPS throughput is acceptable. Designers should still verify timing and interface requirements against the respective datasheets.
What is the maximum sampling rate of each device?
The AD7980ARMZ supports a maximum throughput of 1 MSPS. The AD7988-5BRMZ supports a maximum throughput of 500 kSPS. Both are 16-bit successive-approximation register (SAR) ADCs with a pseudo-differential input.
How do the power consumption figures compare?
Both devices operate from a 2.5 V to 5.5 V supply and feature power scaling with throughput. At their respective maximum rates, the AD7980ARMZ consumes approximately 4 mW at 1 MSPS, while the AD7988-5BRMZ consumes approximately 2 mW at 500 kSPS. Both offer a shutdown mode to reduce power between conversions.
Do both ADCs use the same serial interface?
Yes. Both the AD7980ARMZ and AD7988-5BRMZ use a SPI-compatible serial interface with a separate supply (VIO) for direct connection to 1.8 V, 2.5 V, 3 V, or 5 V logic. The interface supports daisy-chaining and busy indicator functionality on both parts.
What is the input voltage range for these ADCs?
Both devices use a pseudo-differential input with an IN+ and IN- configuration. The analog input range is 0 V to VREF, where VREF is applied externally and can range from 2.5 V to 5.5 V, independent of the supply voltage. This allows flexible full-scale range selection.
Can the AD7988-5BRMZ be used in an existing AD7980ARMZ design?
In most cases yes, because the devices are pin-compatible and share the same interface and reference requirements. However, the system must be validated for the reduced 500 kSPS throughput, and the digital host must accommodate the correspondingly longer conversion timing. Always confirm against the AD7988-5 datasheet before substitution.