Part A
AD9761ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7536 PCS
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD9761ARSZ and AD976BR are not drop-in replacements for one another. Although both are 16-bit CMOS analog-to-digital converters, they differ in resolution architecture, sampling rate, package footprint, and interface configuration, so a direct board-level substitution is not possible without design changes.
Different sampling rate
Different package footprint
Different interface configuration
Different resolution architecture
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9761ARSZ | AD976BR | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 16 bit | Resolution determines the number of discrete output levels; a 16-bit DAC offers far finer granularity than a 10-bit device, so they are not functionally interchangeable in precision applications. |
| Number of D/A Converters | 2 | 1 | The AD9761ARSZ is a dual DAC while the AD976BR is a single DAC, which fundamentally changes channel count and circuit architecture. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, requiring external I/V conversion, so the output interface topology is compatible. |
| Data Interface | Parallel | Parallel | Both use a parallel digital interface, so the host-side connection style is similar, though bus width differs with resolution. |
| Settling Time | 35 ns | 35 ns | Settling time affects maximum update rate and dynamic performance; matching values suggest comparable speed capability. |
| Reference Type | External, Internal | External, Internal | Both support internal or external reference, giving design flexibility in setting full-scale output. |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V | Analog supply range determines compatibility with the system power rail; identical ranges ease substitution from a power standpoint. |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V | Digital supply range must match the logic interface levels of the driving device; identical ranges support similar interfacing. |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | The operating temperature range indicates environmental robustness; matching industrial ranges suit similar application environments. |
| Package / Case | 28-SSOP | 28-SOIC | Package footprint and pinout must match for board-level drop-in substitution; different package styles require layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9761ARSZ | AD976BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 16 |
| Sampling Rate(Per Second) | - | 100k |
| Number of Inputs | - | 1 |
| Input Type | - | Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | - | S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | Current Source | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Series | TxDAC+® | - |
| Base Product Number | AD9761 | - |
| Number of D / A Converters | 2 | - |
| Settling Time | 35ns (Typ) | - |
| Output Type | Current - Unbuffered | - |
| Differential Output | Yes | - |
| INL / DNL (LSB) | ±0.7, ±0.5 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
Are the AD9761ARSZ and AD976BR functionally interchangeable?
No. The AD9761ARSZ is a dual-channel 10-bit 40 MSPS ADC in a 28-lead SSOP, while the AD976BR is a single-channel 16-bit 200 kSPS ADC in a 28-lead SOIC. They differ in resolution, channel count, sample rate, and package, so they are not drop-in replacements.
What are the key resolution and sampling-rate differences between the AD9761ARSZ and AD976BR?
The AD9761ARSZ provides 10-bit resolution per channel with two channels at up to 40 MSPS. The AD976BR provides 16-bit resolution on a single channel at up to 200 kSPS.
Do the AD9761ARSZ and AD976BR use the same package and pinout?
No. The AD9761ARSZ is supplied in a 28-lead SSOP (RS suffix), and the AD976BR is supplied in a 28-lead SOIC (R suffix). The package types and pin assignments differ, so PCB footprints are not compatible.
What are the typical applications for each device?
The AD9761ARSZ, with dual 10-bit channels at 40 MSPS, targets communications and signal-processing applications requiring simultaneous I/Q sampling. The AD976BR, with 16-bit resolution at 200 kSPS, targets precision measurement, instrumentation, and low-speed data-acquisition applications.
Can the AD976BR be used as a substitute where an AD9761ARSZ is specified?
No. Substitution would require redesign because the AD976BR is single-channel, has lower throughput (200 kSPS vs 40 MSPS), higher resolution (16-bit vs 10-bit), and a different package and pinout. The system architecture and PCB must be revalidated.
Do both parts support the same digital interface?
No. The AD9761ARSZ provides dual-channel parallel CMOS-compatible output data for two 10-bit channels. The AD976BR provides a single-channel parallel output for 16-bit data. Interface timing, word width, and bus configuration differ between the two devices.
Are the AD9761ARSZ and AD976BR available in RoHS-compliant versions?
The AD9761ARSZ suffix "Z" denotes a RoHS-compliant package per Analog Devices nomenclature. The AD976BR is a non-Z suffix part and should be verified against the specific manufacturer datasheet and ordering guide for RoHS status before use in compliant designs.