Part A
AD780BRZ-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6342 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Replacement verdict
Not a drop-in replacement
The AD780BRZ-REEL and AD7808BR are not functionally interchangeable. The AD780BRZ-REEL is a precision 2.5 V/3.0 V voltage reference in an SOIC-8 package, while the AD7808BR is an 8-bit multiplying D/A converter in a 20-lead SOIC package. Their core functions, pin configurations, and electrical characteristics differ fundamentally, so substituting one for the other is not feasible without a complete circuit redesign.
Different device function
Different package type
Different pin count
Different supply requirements
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD780BRZ-REEL | AD7808BR | Why it matters |
|---|---|---|---|
| Function / Device Type | Voltage reference (2.5 V / 3.0 V ultrahigh precision) | 8-channel, 12-bit serial DAC (digital-to-analog converter) | These are fundamentally different device classes; one is a reference source and the other is a DAC, so they are not functionally substitutable. |
| Package / Mounting | 8-lead SOIC (surface mount) | 24-lead SOIC (surface mount) | Different footprint and pin count prevent drop-in board replacement. |
| Number of Channels | 1 (single reference output) | 8 DAC channels | Channel count defines how many independent outputs the device provides. |
| Output / Supply Voltage Range | 2.5 V or 3.0 V output; wide input supply range | Operates from single +5 V supply with buffered voltage outputs | Supply and output voltage compatibility is essential for matching system rails. |
| Interface / Control | Analog output only (no digital interface) | Serial digital interface (SPI-compatible) for DAC programming | A digital control interface is required to set DAC codes, whereas a reference needs none. |
| Initial Accuracy / Precision | High-precision reference (B grade, tight initial accuracy) | 12-bit DAC resolution with specified linearity | Precision specs determine suitability for accurate analog signal generation or referencing. |
| Primary Application | Precision voltage reference for ADCs, DACs, and instrumentation | Multi-channel analog output generation and control | Intended use cases differ, confirming they serve different roles in a circuit. |
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 | AD780BRZ-REEL | AD7808BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | - | 10 |
| Number of D/A Converters | - | 8 |
| Settling Time | - | 4µs |
| Output Type | Programmable | Voltage - Buffered |
| Differential Output | - | No |
| Data Interface | - | SPI |
| Reference Type | Series, Shunt | External, Internal |
| Voltage - Supply, Analog | - | 3V ~ 5.5V |
| Voltage - Supply, Digital | - | 3V ~ 5.5V |
| INL / DNL(LSB) | - | ±4 (Max), ±0.125 |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C |
| Voltage - Output (Min/Fixed) | ±2.5V, ±3V | - |
| Current - Output | 10 mA | - |
| Tolerance | ±0.04%, ±0.03% | - |
| Temperature Coefficient | 3ppm/°C | - |
| Noise - 01 Hzto10 Hz | 4µVp-p | - |
| Voltage - Input | 4V ~ 36V | - |
| Supply Current | 1mA | - |
| Current - Cathode | 1 mA | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD780BRZ-REEL and AD7808BR the same type of component?
No. The AD780BRZ-REEL is a 2.5 V/3.0 V high-precision voltage reference in an 8-lead SOIC package, while the AD7808BR is an 8-bit multiplying digital-to-analog converter (DAC) in a 20-lead SOIC package. They are functionally different devices and are not interchangeable.
What are the key differences in function between the AD780BRZ-REEL and AD7808BR?
The AD780BRZ-REEL provides a stable, low-drift reference voltage (selectable 2.5 V or 3.0 V) for use as a system reference. The AD7808BR is an 8-bit multiplying DAC that converts digital input codes into an analog output proportional to an applied reference voltage. One is a reference source; the other is a data converter.
Do the AD780BRZ-REEL and AD7808BR use the same package and pinout?
No. The AD780BRZ-REEL is supplied in an 8-lead SOIC (R-8) package, while the AD7808BR is supplied in a 20-lead SOIC (R-20) package. Pin counts, pin functions, and PCB land patterns differ, so they cannot be dropped into the same footprint.
Can the AD780BRZ-REEL be used as the reference for an AD7808BR DAC?
Yes, in principle. The AD780BRZ-REEL provides a precision 2.5 V or 3.0 V reference output that can serve as the reference input for the AD7808BR multiplying DAC, provided the system's reference voltage, compliance, and loading requirements are satisfied per the respective datasheets.
What is the resolution and architecture of the AD7808BR?
The AD7808BR is an 8-bit multiplying DAC. As a multiplying converter, its analog output depends on both the digital input code and the externally applied reference voltage, allowing it to perform multiplication and attenuation functions in signal-processing applications.
What output voltage options does the AD780BRZ-REEL provide?
The AD780BRZ-REEL is a high-precision reference that offers a selectable output of 2.5 V or 3.0 V, depending on the configuration of its control pin, per the Analog Devices datasheet.
Are the AD780BRZ-REEL and AD7808BR available in reel packaging?
The AD780BRZ-REEL suffix indicates tape-and-reel packaging for the 8-lead SOIC reference. The AD7808BR is specified as a tube/rail-style ordering code in its standard form; reel variants, if offered, would carry a distinct orderable part number that must be confirmed with the manufacturer or an authorized distributor.
Can these two parts be substituted for one another in an existing design?
No. Because one is a voltage reference and the other is an 8-bit multiplying DAC, with different functions, pin counts, and packages, they are not substitutes. Any replacement decision must be validated against the manufacturer datasheets and the target circuit requirements.