Part A
AD7684BRMZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6195 PCS
- Package
- MSOP-8
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7680BRMZ and AD7684BRMZRL7 are both 16-bit successive-approximation ADCs in the same MSOP-8 package with a comparable serial interface, making the AD7684BRMZRL7 a viable functional replacement candidate for the AD7680BRMZ in many designs. However, the two parts differ in input architecture and reference configuration, so the replacement should be validated against the specific signal-chain requirements before adoption.
Resolution and ADC Architecture
High match
Package and Pin Configuration
High match
Input Type and Signal Range
Validation required
Reference Configuration
Validation required
Parts at a glance
Part B
AD7680BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5939 PCS
- Package
- MSOP-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 | AD7680BRMZ | AD7684BRMZRL7 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Number of Input Channels | 1 (single-ended) | 1 (differential) | Input configuration differs: single-ended vs differential affects signal conditioning, noise immunity, and board layout, so they are not drop-in substitutes. |
| Sampling Rate (max) | 100 kSPS | 100 kSPS | Identical throughput means timing and system bandwidth requirements are the same for both parts. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Same serial interface simplifies firmware and host-controller compatibility when swapping parts. |
| Supply Voltage (VDD) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply range allows operation from the same rails without regulator changes. |
| Reference Type | External reference | External reference | Both require an external reference, so reference circuitry can be reused across designs. |
| Package | 8-lead MSOP (RM) | 8-lead MSOP (RM) | Same package footprint enables PCB layout reuse, though pin functions may differ. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both suit the same industrial environments. |
| Power Consumption (typical) | 3.5 mW at 3 V, 100 kSPS | 3.5 mW at 3 V, 100 kSPS | Equivalent power draw supports similar thermal and battery-life budgets. |
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 | AD7684BRMZRL7 | AD7680BRMZ |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | 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 differences between the AD7680BRMZ and AD7684BRMZRL7?
The AD7680BRMZ is a 16-bit, 100 kSPS successive-approximation ADC with a pseudo-differential input, while the AD7684BRMZRL7 is a 16-bit, 100 kSPS SAR ADC with a true differential input. Both are offered in a 10-lead MSOP package and operate from a 2.7 V to 5.5 V supply, but they differ in input configuration and interface timing details as specified in their respective datasheets.
Are the AD7680BRMZ and AD7684BRMZRL7 pin-compatible?
Both devices are packaged in a 10-lead MSOP (RM suffix), but pin functions are not identical because the AD7680BRMZ uses a pseudo-differential input structure and the AD7684BRMZRL7 uses a true differential input structure. Designers must verify pin assignments against the official Analog Devices datasheets before considering any board-level substitution.
What is the resolution and throughput of each device?
Both the AD7680BRMZ and AD7684BRMZRL7 are 16-bit SAR ADCs with a maximum throughput of 100 kSPS, as specified in the Analog Devices datasheets.
What input configuration does each ADC support?
The AD7680BRMZ provides a pseudo-differential input, whereas the AD7684BRMZRL7 provides a true differential input. This difference affects common-mode rejection and signal conditioning requirements in the application circuit.
What supply voltage range do these ADCs require?
Both the AD7680BRMZ and AD7684BRMZRL7 operate from a single supply in the 2.7 V to 5.5 V range, per the Analog Devices datasheets.
What serial interface do the AD7680BRMZ and AD7684BRMZRL7 use?
Both devices provide an SPI-compatible serial interface for connection to microcontrollers and DSPs. The exact timing and mode requirements should be confirmed from the respective Analog Devices datasheets before finalizing the digital interface design.
Can the AD7684BRMZRL7 be used as a drop-in replacement for the AD7680BRMZ?
No. Although both are 16-bit, 100 kSPS ADCs in a 10-lead MSOP package, the AD7680BRMZ has a pseudo-differential input and the AD7684BRMZRL7 has a true differential input, so pin functions and signal conditioning differ. A direct drop-in replacement is not supported without validating the design against both datasheets.