Part A
AD7683BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5609 PCS
- Package
- MSOP-8
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Not a drop-in replacement
The AD7683BRMZ and AD7680ARM-REEL are both 16-bit successive-approximation ADCs, but they differ in resolution-to-throughput architecture, package footprint, and interface timing, so they are not interchangeable without a full board and firmware redesign. The AD7683BRMZ offers a pseudo-differential input with a 100 kSPS throughput in an MSOP-8 package, while the AD7680ARM-REEL provides a single-ended input with a 100 kSPS rate in an MSOP-8 package but with different serial timing and reference behavior. Designers must validate reference drive, digital timing, and layout before considering any substitution.
Different input configuration
Different serial interface timing
Different reference architecture
Different package footprint
Parts at a glance
Part B
AD7680ARM-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2486 PCS
- Package
- TSSOP-8
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD7680ARM-REEL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so nominal resolution is equivalent for substitutability. |
| Sampling Rate | 100 kSPS | 100 kSPS | Maximum throughput determines whether the part meets system timing requirements. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Channel count and input configuration must match the signal chain topology. |
| Input Type | Single-ended, pseudo-differential | Single-ended | Input architecture affects how the sensor or source must be connected and referenced. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range must be compatible with the system rail to allow direct replacement. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Digital interface compatibility determines whether the host can drive the ADC without glue logic. |
| Package | 10-lead MSOP | 8-lead MSOP | Different pin counts and footprints require layout changes and are not drop-in compatible. |
| Pin Count | 10 | 8 | Pin count mismatch prevents direct PCB substitution without redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Power Consumption | Typically ~4 mW at 5 V, 100 kSPS | Typically ~4 mW at 5 V, 100 kSPS | Power budget compatibility is important for portable and thermally constrained designs. |
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 | AD7683BRMZ | AD7680ARM-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential | Single Ended |
| 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 | Supply |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the AD7683BRMZ and the AD7680ARM-REEL?
The AD7683BRMZ is a 16-bit, 100 kSPS PulSAR analog-to-digital converter with a pseudo-differential input and a serial SPI-compatible interface, housed in a 10-lead MSOP. The AD7680ARM-REEL is a 16-bit, 100 kSPS successive-approximation ADC with a single-ended input, also featuring a serial interface, but packaged in an 8-lead MSOP. The AD7683 offers a pseudo-differential input structure, while the AD7680 provides a single-ended input.
Are the AD7683BRMZ and AD7680ARM-REEL pin-compatible?
No. The AD7683BRMZ uses a 10-lead MSOP package, whereas the AD7680ARM-REEL uses an 8-lead MSOP package. The different pin counts and pin functions mean the two devices are not drop-in replacements and require different PCB land patterns.
Do both ADCs support the same serial interface and throughput?
Yes. Both the AD7683BRMZ and AD7680ARM-REEL provide a serial interface compatible with SPI/QSPI/MICROWIRE/DSP standards and offer a maximum throughput of 100 kSPS at 16-bit resolution. Both operate from a single 2.7 V to 5.5 V supply.
How do the input configurations of the AD7683BRMZ and AD7680ARM-REEL differ?
The AD7683BRMZ features a pseudo-differential input that allows the negative input to be driven by a small signal relative to ground, improving rejection of common-mode noise. The AD7680ARM-REEL has a single-ended input referenced to ground. This difference affects signal conditioning and grounding requirements in the target design.
Can the AD7680ARM-REEL directly replace the AD7683BRMZ in an existing design?
No, a direct replacement is not possible without design changes. The package difference (8-lead versus 10-lead MSOP) and the input configuration difference (single-ended versus pseudo-differential) require PCB layout and signal-chain modifications, and the change must be validated against the respective manufacturer datasheets.
What are the operating temperature ranges for these two converters?
Both the AD7683BRMZ and AD7680ARM-REEL are specified for the industrial temperature range of −40°C to +85°C, as documented in their respective Analog Devices datasheets.
Which part should be selected for a pseudo-differential measurement application?
The AD7683BRMZ is the appropriate choice when a pseudo-differential input is required, since the AD7680ARM-REEL provides only a single-ended input. Selection should be confirmed against the application's signal range, grounding scheme, and the verified datasheet specifications.