Part A
AD7680BRM
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3423 PCS
- Package
- TSSOP-8
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7683BRMZ and AD7680BRM are both 16-bit successive-approximation ADCs in 8-lead MSOP packages with similar serial interface architecture, making them a viable functional replacement candidate. However, the AD7683BRMZ offers a higher throughput rate of 100 kSPS versus 100 kSPS for the AD7680BRM, and the two devices differ in their analog input configuration and reference architecture, so validation of the specific application circuit is required before substitution.
Resolution
High match
Package Type
High match
Sampling Rate
Validation required
Analog Input Configuration
Validation required
Parts at a glance
Part B
AD7683BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5609 PCS
- Package
- MSOP-8
- 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 | AD7683BRMZ | AD7680BRM | Why it matters |
|---|---|---|---|
| Resolution | 16 bits | 16 bits | Both are 16-bit ADCs, so nominal resolution is equivalent for substitutability. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical throughput means either part can meet the same sampling requirements. |
| Input Type | Pseudo-differential, single-ended | Single-ended | The AD7683 supports pseudo-differential inputs, which can reject common-mode noise; the AD7680 is strictly single-ended, affecting signal-chain design. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Both use the same serial interface, simplifying drop-in replacement at the digital side. |
| Supply Voltage | 2.7 V to 5.5 V | 2.5 V to 5.5 V | The AD7680 supports a slightly lower minimum supply, which may matter in low-voltage systems. |
| Package | 10-lead MSOP | 8-lead MSOP | Different pin counts and footprints mean the parts are not directly drop-in compatible on a PCB. |
| Reference | External reference | External reference | Both require an external reference, so reference design can be shared between the two. |
| Power Consumption | Typically ~4 mW at 5 V, 100 kSPS | Typically ~3.5 mW at 5 V, 100 kSPS | Lower power in the AD7680 can benefit battery-powered or thermally constrained designs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings allow use in the same environmental conditions. |
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 | AD7680BRM | AD7683BRMZ |
|---|---|---|
| Supplier | Analog Devices Inc.,Rochester Electronics, LLC | - |
| Series | PulSAR® | PulSAR® |
| Part Status | Obsolete | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | 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 | Supply | External |
| Voltage - Supply, Analog | 2.5V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.5V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7683BRMZ and the AD7680BRM?
The AD7683BRMZ is a 16-bit, 100 kSPS PulSAR analog-to-digital converter with a pseudo-differential input, while the AD7680BRM is a 16-bit, 100 kSPS PulSAR ADC with a single-ended input. Both are supplied in 8-lead MSOP packages and operate from a 2.7 V to 5.25 V supply, but they differ in input configuration and serial interface timing details.
Are the AD7683BRMZ and AD7680BRM pin-compatible?
Both devices are offered in an 8-lead MSOP package, but pin functions are not identical. The AD7683BRMZ provides a pseudo-differential input pair (IN+ and IN−), whereas the AD7680BRM has a single-ended analog input. Designers must verify the pin assignments against the respective manufacturer datasheets before considering a layout-compatible substitution.
Do the AD7683BRMZ and AD7680BRM have the same resolution and throughput?
Yes. Both the AD7683BRMZ and the AD7680BRM are 16-bit successive-approximation PulSAR ADCs specified for a maximum throughput of 100 kSPS, making them comparable in resolution and sampling rate for precision data-acquisition applications.
What serial interface do the AD7683BRMZ and AD7680BRM use?
Both devices use a serial peripheral interface compatible with SPI, QSPI, MICROWIRE, and DSP interfaces. The AD7683BRMZ provides a 3-wire serial interface with a dedicated CS and SCLK, while the AD7680BRM also uses a serial clock and chip-select scheme; designers should confirm the exact timing and data-frame format from the respective datasheets.
Can the AD7683BRMZ and AD7680BRM operate from the same supply voltage?
Yes. Both the AD7683BRMZ and the AD7680BRM are specified for operation from a single supply in the range of 2.7 V to 5.25 V, allowing them to be used in similar low-voltage system rails.
Which device should be selected for a single-ended input application?
The AD7680BRM is the appropriate choice for a single-ended analog input, as it is specified with a single-ended input configuration. The AD7683BRMZ, with its pseudo-differential input, is better suited where a differential or referenced input is required.
Are the AD7683BRMZ and AD7680BRM available in the same package type?
Both the AD7683BRMZ and the AD7680BRM are offered in an 8-lead MSOP package. The "RM" suffix in both part numbers denotes the MSOP package option, and the "Z" suffix on the AD7683BRMZ indicates RoHS-compliant packaging.