Part A
AD7983BRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4332 個数
- Package
- MSOP-10
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7988-5BRMZ and AD7983BRMZ are both 16-bit successive-approximation ADCs in the same MSOP-10 package with identical pinout and SPI-compatible serial interface, making them strong functional replacement candidates. The AD7988-5BRMZ offers a higher 500 kSPS throughput versus 330 kSPS for the AD7983BRMZ, while both share comparable INL, supply, and temperature specifications. Designers should validate timing margins and power budget against the target application before substituting.
Resolution and Architecture
High match
Package and Pinout
High match
Sampling Rate
Validation required
Digital Interface
High match
Parts at a glance
Part B
AD7988-5BRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6169 個数
- Package
- MSOP-10
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | AD7988-5BRMZ | AD7983BRMZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and not a differentiator for substitutability. |
| Maximum Sampling Rate | 500 kSPS | 1.33 MSPS | The AD7983 offers roughly 2.6x higher throughput, which matters for higher-bandwidth signal acquisition and faster control loops. |
| Input Type | Pseudo-differential (single-ended) | Pseudo-differential (single-ended) | Both accept pseudo-differential inputs, so the analog front-end topology can remain the same. |
| Supply Voltage (VDD) | 2.375 V to 2.625 V | 2.375 V to 2.625 V | Identical core supply range means the same power rail design can be reused. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Same serial interface simplifies drop-in replacement at the digital host side. |
| Package | 10-lead MSOP (RMZ) | 10-lead MSOP (RMZ) | Identical package and pinout allow the same PCB footprint to be used for either part. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Same industrial temperature range supports use in the same environmental conditions. |
| Power Consumption (typical) | 3.5 mW at 500 kSPS | 9.5 mW at 1.33 MSPS | The AD7988-5 consumes less power at its lower rate, which matters for power-sensitive designs; the AD7983 trades power for speed. |
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 | AD7983BRMZ | AD7988-5BRMZ |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 1.33M | 500k |
| 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 ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7988-5BRMZ and AD7983BRMZ?
Both are 16-bit, successive-approximation register (SAR) analog-to-digital converters (ADCs) from Analog Devices in a 10-lead MSOP (RMZ) package and operate from a 2.5 V supply. The primary difference is throughput: the AD7988-5BRMZ offers a 500 kSPS maximum sampling rate, while the AD7983BRMZ offers a 1 MSPS maximum sampling rate. Both use a pseudo-differential input with a 0 V to VREF range and an SPI-compatible serial interface.
Are the AD7988-5BRMZ and AD7983BRMZ pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RMZ) package and share the same pinout, including VDD, VIO, REF, IN+, IN-, GND, CNV, SDI, SDO, and SCK. This allows a common PCB footprint, but the higher 1 MSPS throughput of the AD7983BRMZ must be validated against the timing and interface constraints of the target design.
Do the AD7988-5BRMZ and AD7983BRMZ have the same resolution and input range?
Yes. Both are 16-bit SAR ADCs with no missing codes and a pseudo-differential analog input range of 0 V to VREF, where VREF is typically 5 V (independent of the 2.5 V supply). Both digitize the difference between IN+ and IN- over that range.
What is the maximum sampling rate of each device?
The AD7988-5BRMZ has a maximum throughput of 500 kSPS. The AD7983BRMZ has a maximum throughput of 1 MSPS. The higher rate of the AD7983BRMZ requires the digital host to support the corresponding serial clock and conversion timing.
Are the power supply and reference requirements the same for both parts?
Both devices operate from a 2.5 V VDD supply and a separate VIO supply for the digital interface, and both require an external reference (REF) that sets the full-scale input range. The reference voltage is independent of VDD, so the same reference source can generally serve either device, subject to the reference's drive and settling requirements at the chosen throughput.
Can the AD7988-5BRMZ be used as a drop-in replacement for the AD7983BRMZ?
Because they share the same package, pinout, resolution, and input range, the AD7988-5BRMZ can often be placed on a board designed for the AD7983BRMZ. However, it is limited to 500 kSPS, so any design that relies on the AD7983BRMZ's 1 MSPS throughput would not meet its sampling requirement. The substitution should be validated against the system's timing, throughput, and accuracy requirements using the respective datasheets.
Do both converters use the same serial interface and timing protocol?
Both use an SPI-compatible serial interface with CNV, SCK, SDI, and SDO signals and support daisy-chain and busy-indicator modes. The interface protocol is the same, but the maximum SCK frequency and the conversion/acquisition timing differ because the AD7983BRMZ supports twice the throughput of the AD7988-5BRMZ. The digital host timing must be checked against the specific device's datasheet.