Part A
AD977ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7094 Stückzahl
- Package
- SOIC-20
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD977BRZRL is a functionally compatible replacement candidate for the AD977ARZ, sharing the same 16-bit resolution, 100 kSPS sampling rate, and 20-pin SOIC package. The primary distinction is the grade-level specification: the AD977BRZRL offers tighter INL and DNL performance, making it suitable for higher-accuracy applications, while both parts remain pin-compatible and interchangeable in most designs.
Resolution and Sampling Rate
High match
Package Type
High match
Interface Type
High match
Accuracy Grade
Validation required
Parts at a glance
Part B
AD977BRZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8339 Stückzahl
- Package
- SOIC-20
- Series
- Datenerfassung mit Analog to Digital Converters (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 | AD977ARZ | AD977BRZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both parts share the same 16-bit resolution, so conversion accuracy class is equivalent for substitutability. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical maximum throughput means either part can meet the same system timing requirements. |
| INL (Integral Nonlinearity) | ±2.0 LSB max | ±1.0 LSB max | The B-grade offers tighter linearity, which affects DC accuracy and may matter in precision measurement applications. |
| DNL (Differential Nonlinearity) | ±1.0 LSB max | ±1.0 LSB max | Equal DNL guarantees no missing codes to the same degree, so monotonicity performance is comparable. |
| Input Type | Single-ended | Single-ended | Same analog input configuration allows direct drop-in use without front-end redesign. |
| Interface | Parallel (16-bit) | Parallel (16-bit) | Identical digital interface ensures the same microcontroller or DSP connection works for both parts. |
| Supply Voltage | 5 V (analog and digital) | 5 V (analog and digital) | Matching supply requirements mean the same power rail design supports either device. |
| Package / Mounting | 28-SOIC (surface mount) | 28-SOIC (surface mount), tape and reel | Same package footprint enables board-level interchangeability; the RL suffix denotes reel packaging for automated assembly. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings confirm both parts suit the same industrial operating environments. |
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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 | AD977ARZ | AD977BRZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 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 AD977ARZ and AD977BRZRL?
Both are 16-bit, 100 kSPS analog-to-digital converters from Analog Devices in a 28-lead SOIC package. The AD977ARZ 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 AD977ARZ is typically supplied in tube packaging.
Are the AD977ARZ and AD977BRZRL functionally interchangeable?
Yes, both devices share the same 16-bit SAR ADC architecture, pinout, and 28-lead SOIC footprint. The primary differences are the operating temperature grade and the packaging format, so functional interchangeability is possible when the target application's temperature range is satisfied.
What is the resolution and sampling rate of these AD977 variants?
Both the AD977ARZ and AD977BRZRL are 16-bit successive-approximation ADCs with a maximum throughput of 100 kSPS.
What analog input range do the AD977ARZ and AD977BRZRL support?
Both devices accept a bipolar analog input range of ±10 V, configured via the on-chip input scaling resistors.
What digital interface do these converters use?
Both parts provide a parallel 16-bit digital output interface compatible with standard microprocessor buses, along with a conversion start input and a busy/status output.
What are the power supply requirements for the AD977ARZ and AD977BRZRL?
Both devices operate from a +5 V analog supply and a +5 V digital supply, with typical power dissipation of approximately 100 mW.
Why would a design choose the AD977BRZRL over the AD977ARZ?
The AD977BRZRL is specified for 0°C to +70°C commercial operation and is supplied in tape-and-reel format, which suits high-volume automated assembly lines. The AD977ARZ covers the wider −40°C to +85°C industrial range for applications requiring extended temperature operation.
Do the AD977ARZ and AD977BRZRL differ in accuracy specifications?
Both variants share the same 16-bit resolution and core linearity performance. The distinguishing specification between the two orderable part numbers is the rated operating temperature range, not the converter accuracy grade.