Part A
AD7686BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2475 PCS
- Package
- TFSOP-10
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7686BRMZ and AD7688BRMRL7 are both 16-bit, 500 kSPS successive-approximation ADCs from Analog Devices in the same MSOP-10 package, sharing a compatible serial interface and reference architecture. The AD7688BRMRL7 offers a differential input configuration versus the pseudo-differential input of the AD7686BRMZ, so while the devices are functionally related and pin-compatible in footprint, the input topology difference must be validated against the target signal chain before substitution.
Resolution and Sample Rate
High match
Package Type
High match
Input Configuration
Validation required
Serial Interface
High match
Parts at a glance
Part B
AD7688BRMRL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 17 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD7686BRMZ | AD7688BRMRL7 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Sampling Rate (SPS) | 500 kSPS | 500 kSPS | Identical throughput means either part can meet the same acquisition bandwidth requirements. |
| Input Type | Pseudo-differential (single-ended) | Fully differential | Input topology differs; a fully differential input requires different front-end signal conditioning than a pseudo-differential input, affecting direct substitution. |
| Number of Input Channels | 1 | 1 | Both are single-channel devices, so channel count is not a constraint when swapping. |
| Interface | SPI / DSP serial (QSPI, MICROWIRE, DSP compatible) | SPI / DSP serial (QSPI, MICROWIRE, DSP compatible) | Matching serial interfaces allow the same digital host connection and firmware protocol. |
| Supply Voltage (Analog & Digital) | 5 V (2.5 V to 5.5 V range) | 5 V (2.5 V to 5.5 V range) | Same supply requirements mean the power design can be reused without modification. |
| Package | 10-lead MSOP | 10-lead MSOP | Identical package and pinout enable drop-in PCB compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature range ensures equivalent environmental robustness for industrial applications. |
| INL (Integral Nonlinearity) | ±0.6 LSB typ | ±0.6 LSB typ | Equivalent linearity performance means accuracy specifications are preserved when substituting. |
| Power Consumption | 3.75 mW typ at 5 V, 500 kSPS | 3.75 mW typ at 5 V, 500 kSPS | Same power draw keeps thermal and energy budgets unchanged across the swap. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7686BRMZ | AD7688BRMRL7 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 500k | 500k |
| Data Interface | SPI, DSP | SPI, DSP |
| Number of A/D Converters | 1 | 1 |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Number of Inputs | 1 | - |
| Input Type | Pseudo-Differential | - |
| Configuration | S/H-ADC | - |
| Ratio - S / H: ADC | 1:1 | - |
| Architecture | SAR | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 5V | - |
Frequently asked questions
What are the key differences between the AD7686BRMZ and AD7688BRMRL7?
The AD7686BRMZ is a 16-bit, 500 kSPS PulSAR analog-to-digital converter, while the AD7688BRMRL7 is a 16-bit, 500 kSPS PulSAR ADC with a different serial interface configuration and packaging option. Both are 16-bit successive-approximation ADCs from Analog Devices in 10-lead MSOP packages, but they differ in their digital interface timing and ordering format (the AD7688BRMRL7 is supplied in tape-and-reel form). Designers should consult the respective datasheets for interface timing and configuration details before substitution.
Do the AD7686BRMZ and AD7688BRMRL7 have the same resolution and throughput?
Yes. Both devices are 16-bit PulSAR ADCs with a maximum throughput of 500 kSPS, making them comparable in resolution and sampling rate for precision data-acquisition applications.
Are the AD7686BRMZ and AD7688BRMRL7 pin-compatible?
Both devices are offered in a 10-lead MSOP package. However, pin function assignments and interface signals should be verified against the official Analog Devices datasheets for each part before considering a direct board-level replacement, since interface and configuration pins may differ.
What is the difference in packaging between the AD7686BRMZ and AD7688BRMRL7?
The AD7686BRMZ is supplied in a tube/tray format in a 10-lead MSOP package, while the AD7688BRMRL7 suffix indicates tape-and-reel packaging (the "RL7" denotes reel quantity/format). Both use the same 10-lead MSOP body, but the delivery format differs for automated assembly.
Can the AD7686BRMZ be used as a drop-in replacement for the AD7688BRMRL7?
Not without validation. Although both are 16-bit, 500 kSPS PulSAR ADCs in 10-lead MSOP packages, differences in serial interface timing, configuration, and reference requirements must be checked against the Analog Devices datasheets. A direct substitution should only be made after confirming pin functions and digital timing compatibility in the target design.
What supply voltage and reference requirements apply to these ADCs?
Both the AD7686 and AD7688 operate from a single 5 V analog supply with a separate digital interface supply, and they use an external reference. Exact supply ranges, reference voltage limits, and current consumption should be confirmed from the official Analog Devices datasheets for each specific part number.
Which applications are these 16-bit PulSAR ADCs suited for?
Both devices target precision data-acquisition applications such as industrial instrumentation, medical instrumentation, and battery-powered systems where 16-bit resolution at 500 kSPS is required. Selection between them should be based on interface compatibility, packaging format, and system-level requirements verified from the manufacturer datasheets.