Part A
AD976AARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1424 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD976AARZ and AD976ABR are functionally equivalent 16-bit 200 kSPS CMOS ADC devices sharing identical resolution, sampling rate, analog input architecture, and 28-lead SOIC footprint; the AD976ABR offers a tighter maximum INL grade, making it a viable higher-accuracy drop-in candidate for the AD976AARZ in most designs, subject to confirming the tighter linearity grade against system error budget.
Resolution and Sampling Rate
High match
Package and Pinout
High match
Analog Input Architecture
High match
INL Accuracy 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 | AD976ABR | Why it matters |
|---|---|---|---|
| Resolution | 16 bits | 16 bits | Both parts are 16-bit ADCs, so resolution is identical and does not affect substitutability. |
| Sampling Rate | 200 kSPS | 200 kSPS | Identical throughput means either part can meet the same acquisition timing requirements. |
| Input Type | Single-ended | Single-ended | Same input configuration allows direct drop-in use in the same signal chain. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Matching supply requirements ensure the same power design can be reused. |
| Interface | Parallel | Parallel | Identical parallel interface means the same microcontroller or FPGA bus can be used. |
| Package / Case | 28-Lead SOIC (Wide) | 28-Lead SOIC (Wide) | Same package footprint allows physical board compatibility without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings mean both parts suit the same environmental conditions. |
| INL (Integral Nonlinearity) | ±2.0 LSB max | ±1.0 LSB max | The ABR grade offers tighter linearity, which matters for higher-accuracy applications where AARZ may not suffice. |
| DNL (Differential Nonlinearity) | ±1.0 LSB max | ±1.0 LSB max | Equal DNL guarantees no missing codes in both grades, preserving monotonicity. |
| Grade / Accuracy Class | A grade | B grade | The B grade is a higher-accuracy bin; substituting AARZ for ABR may reduce precision in demanding designs. |
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 | AD976AARZ | AD976ABR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 200k | 200k |
| 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 AD976ABR?
Both are 16-bit, 200 kSPS CMOS analog-to-digital converters from Analog Devices in a 28-lead SOIC package. The primary difference is the grade: the AD976AARZ is specified for the commercial temperature range (0°C to +70°C), while the AD976ABR is specified for the industrial temperature range (−40°C to +85°C). The AD976ABR also carries tighter grade specifications for certain AC and DC parameters per the datasheet.
Are the AD976AARZ and AD976ABR pin-compatible?
Yes. Both devices are offered in the same 28-lead SOIC (R-28) package with identical pin assignments, so they are pin-compatible and share the same PCB land pattern.
Can the AD976AARZ and AD976ABR be used interchangeably in a design?
They are functionally interchangeable in terms of resolution, sampling rate, and pinout, but the substitution must account for the temperature grade. The AD976AARZ is rated only for 0°C to +70°C, so it should not replace the AD976ABR in applications requiring operation down to −40°C or up to +85°C. Verify the target design's operating temperature range against the selected grade before substituting.
What are the resolution and sampling rate of these converters?
Both the AD976AARZ and AD976ABR are 16-bit successive-approximation ADCs with a maximum throughput of 200 kSPS.
What analog input range and supply configuration do these parts support?
Both devices operate from a single +5 V supply and accept a bipolar analog input range of ±10 V, with an on-chip reference and sample-and-hold amplifier.
What digital interface do the AD976AARZ and AD976ABR provide?
Both parts provide a parallel 16-bit digital output interface with a standard microprocessor-compatible read timing, allowing direct connection to a 16-bit data bus.
Do the AD976AARZ and AD976ABR differ in package or pin count?
No. Both are supplied in the same 28-lead SOIC package with the same pin count and pin functions; the difference is limited to the temperature grade and associated specification limits.