Part A
AD976ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1637 PCS
- Package
- SOIC-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD976ARZ and AD976ARS are functionally equivalent 16-bit successive-approximation ADCs that share the same core architecture, resolution, and analog input range, differing only in package and temperature-grade options. The AD976ARZ is a strong drop-in candidate for the AD976ARS in most designs, provided the wider commercial temperature range and SOIC-28 package are acceptable for the target application.
Resolution and Architecture
High match
Analog Input Range
High match
Package Type
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD976ARS
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9032 PCS
- Package
- SSOP-28
- 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 | AD976ARZ | AD976ARS | Why it matters |
|---|---|---|---|
| Package / Case | 28-SOIC (0.295", 7.50mm Width) | 28-SSOP (0.209", 5.30mm Width) | Different package footprints require different PCB land patterns, so they are not drop-in board-level substitutes. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount, but the differing body width affects layout and thermal/mechanical fit. |
| Supplier Device Package | 28-SOIC | 28-SSOP | The supplier package designation confirms the physical form factor difference between the two orderable parts. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Identical temperature ratings mean both suit the same environmental conditions despite package differences. |
| Resolution | 16 bit | 16 bit | Same resolution ensures equivalent conversion precision for the target application. |
| Sampling Rate | 100 kSPS | 100 kSPS | Matching throughput means either part meets the same signal bandwidth requirements. |
| Number of Inputs / Channels | 1 | 1 | Single-channel architecture is identical, so system signal routing is unaffected. |
| Interface Type | Parallel | Parallel | Same parallel interface allows reuse of the same digital host connection and timing design. |
| Supply Voltage | 5 V (Analog and Digital) | 5 V (Analog and Digital) | Identical supply requirements mean the same power rail design can be used for either part. |
| RoHS Status | RoHS Compliant | RoHS Compliant | Both meet RoHS, so compliance documentation and environmental requirements are satisfied by either part. |
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 | AD976ARZ | AD976ARS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | Parallel | Parallel |
| 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, Internal | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD976ARZ and AD976ARS?
Both are 16-bit, 100 kSPS successive-approximation ADCs from Analog Devices in the same functional family, but they differ in package and temperature grade. The AD976ARZ is supplied in a 28-lead SOIC (R-28) package, while the AD976ARS is supplied in a 28-lead SSOP (RS-28) package. Both are specified over the −40 °C to +85 °C industrial temperature range. Electrical performance is specified identically in the respective datasheets.
Are the AD976ARZ and AD976ARS electrically and functionally interchangeable?
Functionally, both devices are 16-bit, 100 kSPS SAR ADCs with the same pin functions and internal architecture, so they are electrically equivalent in operation. However, they are not drop-in replacements for each other because the SOIC (R-28) and SSOP (RS-28) packages have different body widths, lead pitches, and PCB land patterns. A board layout designed for one package will not accept the other without a footprint change.
What resolution and throughput do the AD976ARZ and AD976ARS provide?
Both devices provide 16-bit resolution with a maximum throughput of 100 kSPS. They use a successive-approximation register (SAR) architecture with an internal sample-and-hold and are specified for a ±10 V input range in the standard configuration.
What are the supply and reference requirements for these ADCs?
Both parts operate from a +5 V analog supply and a +5 V digital supply, with a separate reference input. The datasheet specifies operation with an external +2.5 V reference for the standard ±10 V input range configuration. Designers should confirm the exact reference and supply conditions against the current Analog Devices datasheet before finalizing a design.
Which package should be selected for a new design, AD976ARZ or AD976ARS?
Package selection depends on board space and assembly constraints. The AD976ARZ in 28-lead SOIC offers a wider body with 1.27 mm lead pitch, which is generally easier to inspect and rework. The AD976ARS in 28-lead SSOP has a narrower body and 0.65 mm lead pitch, saving board area but requiring tighter assembly tolerances. Both are rated for the same −40 °C to +85 °C temperature range, so thermal requirements do not differentiate them.
Do the AD976ARZ and AD976ARS share the same pinout?
Yes, both devices use the same 28-pin functional pinout, with identical signal assignments for the analog inputs, reference, digital interface, and power pins. The difference is the physical package outline and lead pitch, not the pin functions. This means a design can migrate between the two packages by changing only the PCB footprint.
Are the AD976ARZ and AD976ARS RoHS compliant?
The "Z" suffix in AD976ARZ denotes a RoHS-compliant, lead-free package per Analog Devices' ordering nomenclature. The AD976ARS uses the standard (non-Z) suffix, which historically indicates a lead-containing (SnPb) finish. Buyers should verify the exact compliance status and moisture sensitivity level on the current Analog Devices product page or an authorized distributor listing before purchasing, as finish options can change over time.