Part A
AD7988-5BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6169 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7988-5BRMZ is a strong functional replacement candidate for the AD7980ARMZRL7, sharing the same 16-bit SAR architecture, 10-lead MSOP package, and SPI-compatible serial interface. The primary distinction is throughput: the AD7980 supports up to 1 MSPS while the AD7988-5 is rated at 500 kSPS, so the substitution is valid only where the system timing budget accommodates the lower sampling rate. Designers should confirm that the reduced throughput and the correspondingly lower power consumption align with application requirements before adopting the AD7988-5BRMZ as a drop-in alternative.
Resolution and Architecture
High match
Sampling Rate
Validation required
Package and Pinout
High match
Digital Interface
High match
Parts at a glance
Part B
AD7980ARMZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4200 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung mit 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 | AD7988-5BRMZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so resolution is identical and not a differentiator for substitutability. |
| Sampling Rate | 1 MSPS | 500 kSPS | The AD7980 offers twice the throughput, which matters for higher-bandwidth signal acquisition. |
| Number of Input Channels | 1 (single-ended) | 1 (pseudo-differential) | Input configuration affects how the ADC interfaces with the signal source and grounding scheme. |
| Supply Voltage (Analog & Digital) | 2.5 V (2.375 V to 2.625 V) | 2.5 V (2.375 V to 2.625 V) | Identical supply requirements mean the same power rail can be reused in a drop-in design. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Matching serial interfaces allow the same digital host and firmware to be used with either part. |
| Package | 10-lead MSOP (RM) | 10-lead MSOP (RM) | Same package footprint enables direct PCB drop-in replacement without layout changes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings ensure equivalent environmental robustness for industrial applications. |
| Power Consumption (Typical) | ~4 mW at 1 MSPS | ~3.5 mW at 500 kSPS | Lower power per conversion affects thermal budget and battery life in portable designs. |
| INL (Integral Nonlinearity) | ±1.0 LSB max | ±1.0 LSB max | Equivalent linearity means both parts deliver comparable DC accuracy for precision measurement. |
| SNR (Signal-to-Noise Ratio) | 91.5 dB typ | 91.5 dB typ | Matching SNR indicates equivalent noise performance for high-dynamic-range signal chains. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7988-5BRMZ | AD7980ARMZRL7 |
|---|---|---|
| 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 AD7980ARMZRL7 and the AD7988-5BRMZ?
The AD7980ARMZRL7 is a 16-bit, 1 MSPS PulSAR ADC, while the AD7988-5BRMZ is a 16-bit, 500 kSPS PulSAR ADC. Both are successive-approximation register (SAR) analog-to-digital converters with a pseudo-differential input, but the AD7980 offers twice the throughput of the AD7988-5. Both operate from a 2.5 V supply with a separate VIO supply for digital interface flexibility.
Are the AD7980ARMZRL7 and AD7988-5BRMZ pin-compatible?
Yes. Both devices are offered in a 10-lead MSOP (RMZ) package and share the same pinout, including the IN+, IN-, REF, VDD, VIO, SDI, SDO, SCK, CNV, and GND pins. This pin compatibility allows the AD7988-5BRMZ to be used as a lower-speed drop-in alternative to the AD7980ARMZRL7, provided the system timing and throughput requirements are met.
What is the maximum sampling rate of each device?
The AD7980ARMZRL7 supports a maximum throughput of 1 MSPS. The AD7988-5BRMZ supports a maximum throughput of 500 kSPS. Both devices use the same SAR architecture and SPI-compatible serial interface, but the AD7980 is specified for higher-speed applications.
Do both ADCs use the same serial interface and reference voltage?
Yes. Both the AD7980ARMZRL7 and AD7988-5BRMZ use a SPI/QSPI/MICROWIRE/DSP-compatible serial interface with a separate VIO supply for digital I/O. Both use an external reference voltage applied to the REF pin, with a specified reference input range of 2.5 V to 5.0 V, and both support daisy-chain and busy-indicator modes.
What are the power supply requirements for the AD7980ARMZRL7 and AD7988-5BRMZ?
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 5.0 V, allowing direct interfacing to lower-voltage logic. The AD7980ARMZRL7 typically dissipates 4 mW at 1 MSPS, while the AD7988-5BRMZ typically dissipates 2 mW at 500 kSPS, reflecting their respective throughput levels.
Can the AD7988-5BRMZ be used as a replacement for the AD7980ARMZRL7 in an existing design?
Because the two devices are pin-compatible and share the same package and interface, the AD7988-5BRMZ can often be substituted for the AD7980ARMZRL7 when the system can tolerate a reduced maximum throughput of 500 kSPS instead of 1 MSPS. The designer must verify that the lower sampling rate, timing specifications, and power dissipation meet the application requirements.
What is the resolution and input type of both converters?
Both the AD7980ARMZRL7 and AD7988-5BRMZ are 16-bit SAR ADCs with a pseudo-differential analog input. They provide no missing codes at 16 bits and are specified for operation over the industrial temperature range of -40°C to +85°C.