Part A
AD977ABRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4556 PCS
- Package
- SOIC-20
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD977ABRZ and AD977BRZRL are functionally equivalent 16-bit successive-approximation ADCs sharing the same core architecture, resolution, and analog front-end, making the AD977BRZRL a viable replacement candidate for the AD977ABRZ. The primary distinction lies in the grade-level performance binning and packaging format, so designers should confirm that the relaxed linearity and throughput specifications of the BRZ grade still satisfy the target application's accuracy budget before committing to the substitution.
Resolution and Architecture
High match
Analog Input Range
High match
Linearity and Accuracy Grade
Validation required
Throughput and Packaging
Validation required
Parts at a glance
Part B
AD977BRZRL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8339 PCS
- Package
- SOIC-20
- 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 | AD977ABRZ | AD977BRZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Bit depth determines the quantization granularity and achievable dynamic range of the ADC; both parts match here. |
| Sampling Rate | 100 kSPS | 100 kSPS | Maximum throughput defines the bandwidth of signals the converter can digitize; identical for both devices. |
| Input Type | Single-ended | Single-ended | Input configuration affects the analog front-end design and signal conditioning required; both are single-ended. |
| Interface | SPI / Serial | SPI / Serial | Digital interface compatibility determines whether the part can drop into an existing board layout; both use a serial interface. |
| Supply Voltage | 5 V | 5 V | Supply voltage must match the system rail to avoid level shifting or damage; both operate from a 5 V supply. |
| Package / Case | 28-SOIC | 28-SOIC | Package footprint and thermal characteristics must match for physical substitutability; both are 28-lead SOIC. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial versus commercial environments; both are rated for the industrial range. |
| Packaging / Delivery Form | Tube | Tape & Reel | Delivery form affects assembly line handling and inventory; the RL suffix indicates tape-and-reel packaging versus tube. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD977ABRZ | AD977BRZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 200k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | ADC | ADC |
| 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 AD977ABRZ and AD977BRZRL?
Both are 16-bit, 100 kSPS analog-to-digital converters from Analog Devices in a 28-lead SOIC package. The AD977ABRZ is specified for the industrial temperature range of −40°C to +85°C, while the AD977BRZRL is specified for the commercial temperature range of 0°C to +70°C. The AD977BRZRL is supplied in tape-and-reel packaging, whereas the AD977ABRZ is typically supplied in tube packaging.
Are the AD977ABRZ and AD977BRZRL functionally interchangeable?
Yes. Both devices share the same 16-bit SAR ADC architecture, the same 100 kSPS maximum throughput, the same pinout, and the same 28-lead SOIC package. The primary differences are the rated operating temperature range and the packaging format, so functional interchangeability is possible when the target application's temperature range is respected.
What is the resolution and sampling rate of these AD977 variants?
Both the AD977ABRZ and AD977BRZRL are 16-bit successive-approximation ADCs with a maximum throughput of 100 kSPS. These parameters are common to the AD977 family and are documented in the Analog Devices datasheet.
What package do the AD977ABRZ and AD977BRZRL use?
Both parts are offered in a 28-lead SOIC (wide body) package. The AD977ABRZ suffix "RZ" denotes the RoHS-compliant SOIC package, and the AD977BRZRL suffix indicates the same RoHS-compliant SOIC package supplied in tape-and-reel form.
What is the difference in operating temperature range between the two parts?
The AD977ABRZ is rated for the industrial temperature range of −40°C to +85°C. The AD977BRZRL is rated for the commercial temperature range of 0°C to +70°C. Designs exposed to temperatures below 0°C or above +70°C should use the industrial-grade AD977ABRZ.
What does the "RL" suffix on the AD977BRZRL indicate?
The "RL" suffix denotes tape-and-reel packaging, which is intended for automated pick-and-place assembly lines. The AD977ABRZ, without the RL suffix, is normally supplied in tube packaging. Both are the same die and package; only the shipping format differs.
Are both the AD977ABRZ and AD977BRZRL RoHS compliant?
Yes. The "Z" in both part numbers indicates RoHS-compliant, lead-free construction per Analog Devices' part-numbering convention. Designers should confirm the current compliance status against the latest manufacturer datasheet or product page before finalizing a design.
Can the AD977BRZRL be used as a drop-in replacement for the AD977ABRZ?
Electrically and mechanically they are the same device in the same 28-lead SOIC package, so a drop-in replacement is possible only if the application operates within the narrower 0°C to +70°C commercial range of the AD977BRZRL. If the design requires the −40°C to +85°C industrial range, the AD977ABRZ must be retained.