Part A
AD7945BRZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3622 ПКС
- Package
- SOIC-20
- Series
- Сбор данных - цифровые в аналоговые преобразователи (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7945BRZ and AD7945BR-REEL are functionally equivalent, sharing identical die, package, and electrical specifications; the only distinction is the shipping format, with the REEL variant supplied on tape-and-reel for automated assembly. Either part number can be used interchangeably in the same design, and selection should be driven solely by production packaging requirements.
Resolution and Architecture
High match
Package Type
High match
Electrical Specifications
High match
Packaging Format
High match
Parts at a glance
Part B
AD7945BR-REEL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4600 ПКС
- Package
- SOIC-20
- Series
- Сбор данных - цифровые в аналоговые преобразователи (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7945BRZ | AD7945BR-REEL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the number of discrete output codes and the achievable measurement precision; both parts provide the same 12-bit resolution. |
| Number of DAC Channels | 1 | 1 | Defines how many independent analog outputs are available; both are single-channel DACs, so channel count is functionally equivalent. |
| Interface Type | Parallel | Parallel | The digital interface must match the host bus; both use a parallel interface, ensuring the same connection scheme. |
| Supply Voltage | 5 V | 5 V | The operating supply must be compatible with the system rail; both parts operate from a 5 V supply. |
| Package / Case | 20-SOIC | 20-SOIC | Package footprint and pinout must match for board-level substitution; both are 20-lead SOIC devices. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must be compatible with the PCB process; both are surface-mount parts. |
| Packaging / Delivery Form | Tube | Tape & Reel | Affects handling and automated assembly; the Z suffix ships in tubes while the REEL suffix ships on tape and reel, though the die and package are the same. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment; both parts are specified over the same industrial range. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7945BRZ | AD7945BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 600µs (Typ) | 600µs (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | Parallel | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| INL / DNL(LSB) | ±0.5 (Max), ±0.5 (Max) | ±0.5 (Max), ±0.5 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between AD7945BRZ and AD7945BR-REEL?
Both are the same AD7945 12-bit multiplying DAC from Analog Devices in a 20-lead SOIC (R-20) package with the same electrical specifications. The difference is packaging format: AD7945BRZ is supplied in tube/rail form, while AD7945BR-REEL is supplied on tape-and-reel for automated pick-and-place assembly. The "Z" suffix in AD7945BRZ denotes RoHS-compliant lead-free construction, and the AD7945BR-REEL is likewise RoHS-compliant.
Are AD7945BRZ and AD7945BR-REEL electrically and functionally identical?
Yes. Both variants share the same AD7945 die and datasheet specifications: 12-bit resolution, current-output multiplying DAC architecture, 5 V single-supply operation, parallel 12-bit input, and the same 20-lead SOIC (R-20) package. The only documented difference is the shipping container (tube vs. tape-and-reel).
Can AD7945BRZ and AD7945BR-REEL be used interchangeably in the same PCB footprint?
Yes. Both are offered in the identical 20-lead SOIC (R-20) package with the same pinout, so the PCB land pattern and footprint are the same. The choice between them is driven by assembly method (manual/tube vs. automated reel feed), not by electrical or mechanical compatibility.
Which variant should be selected for automated SMT production lines?
AD7945BR-REEL is the appropriate choice for automated surface-mount assembly because it is supplied on tape-and-reel, which is compatible with standard pick-and-place feeders. AD7945BRZ in tube/rail form is typically used for manual assembly, prototyping, or low-volume runs.
Do both variants meet RoHS requirements?
Yes. The "Z" suffix in AD7945BRZ indicates RoHS-compliant, lead-free construction per Analog Devices nomenclature, and the AD7945BR-REEL is also specified as a RoHS-compliant part. Designers should confirm the current RoHS status on the manufacturer datasheet or distributor page for the specific orderable part number.
What are the key specifications shared by AD7945BRZ and AD7945BR-REEL?
Both are 12-bit multiplying DACs with a parallel 12-bit input interface, operating from a single 5 V supply, in a 20-lead SOIC (R-20) package. They share the same datasheet parameters for resolution, supply voltage, reference input, and output configuration. For detailed limits such as INL, DNL, settling time, and temperature range, refer to the official AD7945 datasheet, as these apply equally to both orderable variants.
Does the orderable part number suffix affect the manufacturer's warranty or qualification?
The AD7945BRZ and AD7945BR-REEL are the same qualified device; the suffix distinguishes packaging (tube vs. tape-and-reel) and RoHS compliance marking. Qualification, reliability data, and datasheet specifications apply to the AD7945 product family regardless of the shipping format. Buyers should verify the exact orderable part number and its status on the Analog Devices or authorized distributor listing before ordering.