Part A
AD976AARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1424 ПКС
- Package
- SOIC-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD976AARZ and AD976BR are functionally interchangeable 16-bit successive-approximation ADCs sharing the same resolution, analog input range, and parallel interface architecture, making the AD976AARZ a viable replacement candidate for the AD976BR in most designs. Designers should confirm the tighter grade-specific specifications and package thermal characteristics against their application requirements before final qualification.
Resolution and Linearity
High match
Analog Input Range
High match
Digital Interface
High match
Package and Temperature Grade
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD976AARZ | AD976BR | Why it matters |
|---|---|---|---|
| Resolution | 16 bits | 16 bits | Both converters provide 16-bit resolution, so quantization granularity is equivalent for either part. |
| Sampling Rate | 200 kSPS | 200 kSPS | Identical maximum throughput means neither part limits system update rate relative to the other. |
| INL (Integral Nonlinearity) | ±2.0 LSB max | ±1.0 LSB max | The BR grade offers tighter linearity, which improves absolute accuracy and reduces calibration burden in precision measurement designs. |
| DNL (Differential Nonlinearity) | ±1.0 LSB max | ±1.0 LSB max | Equal DNL guarantees no missing codes for both grades, so monotonicity performance is comparable. |
| Input Type | Single-ended | Single-ended | Both accept single-ended analog inputs, so the same signal conditioning front-end can be reused. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Matching 5 V supplies allow drop-in replacement without power rail redesign. |
| Interface | Parallel (16-bit word) | Parallel (16-bit word) | Identical parallel interface means the same microcontroller or DSP bus timing can be used for either part. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same industrial temperature range supports use in identical environmental conditions. |
| Package | 28-lead SOIC (RW-28) | 28-lead SOIC (RW-28) | Identical package and footprint enable direct board-level substitution without layout changes. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD976AARZ | AD976BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 200k | 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 AD976AARZ and the AD976BR?
Both are 16-bit, 200 kSPS CMOS analog-to-digital converters from Analog Devices in a 28-lead SOIC package. The AD976AARZ is the A-grade version with a maximum INL of ±3.0 LSB, while the AD976BR is the B-grade version with a maximum INL of ±2.0 LSB. The AD976BR also specifies tighter DNL (±1.0 LSB max vs ±2.0 LSB max for the A grade) and slightly better SINAD performance.
Are the AD976AARZ and AD976BR pin-compatible and package-compatible?
Yes. Both devices are offered in the same 28-lead SOIC (RW-28) package with identical pin functions, so they are pin-compatible and can share the same PCB land pattern. Functional substitution still requires verifying that the grade-specific specifications meet the target design requirements.
Do the AD976AARZ and AD976BR have the same resolution and sampling rate?
Yes. Both are 16-bit successive-approximation ADCs with a maximum throughput of 200 kSPS, and both support the same analog input range of ±10 V (with ±10 V reference) and the same parallel 16-bit output interface.
How do the accuracy specifications of the AD976AARZ and AD976BR compare?
The AD976BR is the higher-grade device. Its maximum integral nonlinearity (INL) is ±2.0 LSB versus ±3.0 LSB for the AD976AARZ, and its maximum differential nonlinearity (DNL) is ±1.0 LSB versus ±2.0 LSB for the AD976AARZ. Both are guaranteed monotonic over the specified temperature range.
Can the AD976AARZ be used as a drop-in replacement for the AD976BR, or vice versa?
Because both parts share the same package, pinout, resolution, sampling rate, and interface, they are physically interchangeable. However, substituting the AD976AARZ for the AD976BR reduces the guaranteed INL and DNL margins, so the substitution should only be made after confirming that the relaxed A-grade limits satisfy the application's accuracy requirements.
Do both the AD976AARZ and AD976BR operate from the same supply voltages?
Yes. Both devices operate from a +5 V analog supply and a +5 V digital supply, with the same specified power dissipation and the same reference and control pin functions.
What is the operating temperature range for the AD976AARZ and AD976BR?
Both the AD976AARZ and AD976BR are specified for the industrial temperature range of −40 °C to +85 °C, and both are offered in the same 28-lead SOIC package.