Part A
AD976ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1637 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD976ARZ and AD976ABR are functionally interchangeable 16-bit parallel CMOS analog-to-digital converters sharing identical resolution, architecture, and pinout; the AD976ABR offers a tighter grade-level linearity specification, making it a suitable drop-in candidate where the AD976ARZ grade is acceptable or where improved INL/DNL performance is beneficial.
Resolution and Architecture
High match
Package and Pinout
High match
Supply and Interface
High match
Linearity 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 | AD976ARZ | AD976ABR | Why it matters |
|---|---|---|---|
| Resolution | 16 bits | 16 bits | Both parts share the same resolution, so conversion granularity is identical. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical throughput means either part supports the same system timing budget. |
| INL (Integral Nonlinearity) | ±2.0 LSB max | ±1.0 LSB max | The ABR grade offers tighter linearity, which directly improves absolute accuracy in precision measurement applications. |
| DNL (Differential Nonlinearity) | ±1.0 LSB max | ±1.0 LSB max | Equal DNL guarantees no missing codes for both grades, preserving monotonicity. |
| Grade / Accuracy Class | A grade (standard linearity) | B grade (improved linearity) | The grade determines guaranteed linearity limits; the B grade is the higher-precision bin and may be required where error budget is tight. |
| Package / Case | 28-Lead SOIC (R-28) | 28-Lead SOIC (R-28) | Same package footprint allows drop-in board replacement 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 industrial environments. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Same supply requirement ensures power design compatibility between the two parts. |
| Interface Type | Parallel (16-bit word) | Parallel (16-bit word) | Identical parallel interface means the same digital host and timing can drive either device. |
| Power Consumption | 100 mW typ | 100 mW typ | Equivalent power draw keeps thermal and supply sizing unchanged when substituting parts. |
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 | AD976ABR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 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 AD976ARZ and AD976ABR?
Both are 16-bit, 100 kSPS successive-approximation ADCs from Analog Devices in a 28-lead SOIC package. The primary difference is the grade: the AD976ARZ is specified for operation over the −40°C to +85°C industrial temperature range, while the AD976ABR is specified over the 0°C to +70°C commercial temperature range. The "Z" suffix on AD976ARZ denotes RoHS-compliant lead-free construction, whereas the AD976ABR is the non-RoHS lead-frame version.
Are the AD976ARZ 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 AD976ARZ be used as a drop-in replacement for the AD976ABR?
Electrically and mechanically they are interchangeable, but the substitution must be validated against the target design. The AD976ARZ is rated over the wider −40°C to +85°C range and is RoHS-compliant, while the AD976ABR is limited to 0°C to +70°C and is non-RoHS. Confirm that the wider temperature specification and lead-free assembly process are acceptable for the application before substituting.
What are the resolution and sampling rate of the AD976ARZ and AD976ABR?
Both parts are 16-bit successive-approximation analog-to-digital converters with a maximum throughput of 100 kSPS.
What analog input range do the AD976ARZ and AD976ABR support?
Both devices accept a bipolar analog input of ±10 V, configured through the on-chip input scaling resistors.
What digital interface do the AD976ARZ and AD976ABR provide?
Both converters provide a parallel 16-bit output with a standard microprocessor-compatible interface, including chip-select, read, and convert-start control signals.
Do the AD976ARZ and AD976ABR differ in power consumption?
No. Both devices are specified with the same typical power dissipation of approximately 100 mW from a +5 V analog supply and a +5 V digital supply, since they share the same core design and differ only in grade and packaging finish.
Which part should be selected for an industrial-temperature design?
The AD976ARZ should be selected for designs requiring operation down to −40°C and up to +85°C, since the AD976ABR is only specified over the 0°C to +70°C commercial range.