Part A
AD780BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3229 PCS
- Package
- SOIC-8
- Series
- PMIC - Referência à Voltação
Replacement verdict
Not a drop-in replacement
The AD780BRZ and AD7804BR-REEL are not functionally interchangeable. The AD780BRZ is a precision 2.5 V/3.0 V voltage reference in an SOIC-8 package, while the AD7804BR-REEL is a quad 10-bit voltage-output DAC in a 16-lead SOIC. They differ in core function, channel count, package footprint, and pinout, so the AD7804BR-REEL cannot serve as a substitute for the AD780BRZ in existing designs.
Different device function
Different channel count
Different package footprint
Different pinout
Parts at a glance
Part B
AD7804BR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9709 PCS
- Package
- SOIC-16
- Series
- Acquisição de dados - Convertedores digitais para analógicos (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 | AD780BRZ | AD7804BR-REEL | Why it matters |
|---|---|---|---|
| Function / Device Type | Voltage reference (2.5 V / 3.0 V ultrahigh precision) | Quad 10-bit voltage-output DAC | These are fundamentally different device classes; a voltage reference cannot substitute for a DAC, so functional substitutability is not possible. |
| Output Type | Fixed/selectable DC reference voltage | Digital-to-analog converted voltage (SPI programmable) | A reference provides a stable DC level, while a DAC produces digitally controlled analog outputs; the output behavior is entirely different. |
| Number of Channels / Outputs | 1 reference output | 4 DAC outputs | Channel count determines how many independent analog signals can be generated or referenced in a system. |
| Output Voltage Range | 2.5 V or 3.0 V (selectable) | 0 V to VREF (rail-to-rail, set by external reference) | The available output span must match the signal range required by the downstream circuit. |
| Digital Interface | None (analog-only device) | SPI-compatible serial interface | A DAC requires a digital control bus to set its output, whereas a reference has no digital interface; this affects system architecture and microcontroller requirements. |
| Supply Voltage | 4.0 V to 36 V input | 2.7 V to 5.5 V | Supply compatibility determines whether the part can operate from the system's available power rail. |
| Package | 8-lead SOIC | 16-lead SOIC | Package footprint and pin count must match the PCB layout; these parts are not footprint-compatible. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both share the same industrial temperature range, so environmental tolerance is equivalent even though the functions differ. |
| Typical Application | Precision reference for ADCs/DACs, instrumentation | Multichannel programmable voltage generation, control loops | Intended use cases differ, confirming these parts serve complementary rather than interchangeable roles in a signal chain. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD780BRZ | AD7804BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | - | 10 |
| Number of D/A Converters | - | 4 |
| 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) | - | ±3 (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 and AD7804BR-REEL functionally interchangeable?
No. The AD780BRZ is a 2.5 V/3.0 V high-precision voltage reference in an 8-lead SOIC package, while the AD7804BR-REEL is a quad 10-bit voltage-output DAC in a 16-lead SOIC package. They are different device categories with different functions, pinouts, and package sizes, so they cannot be substituted for one another.
What are the key differences in primary function between these two parts?
The AD780BRZ is a precision voltage reference that provides a stable 2.5 V or 3.0 V output for use as a reference source in data acquisition and conversion systems. The AD7804BR-REEL is a quad 10-bit digital-to-analog converter that converts digital input codes into four analog output voltages. One is a reference source; the other is a DAC.
Do the AD780BRZ and AD7804BR-REEL use the same package and pin count?
No. The AD780BRZ is supplied in an 8-lead SOIC package, while the AD7804BR-REEL is supplied in a 16-lead SOIC package. The pin counts and pin functions differ, so PCB footprints and land patterns are not compatible.
What supply voltage does the AD780BRZ require compared with the AD7804BR-REEL?
The AD780BRZ operates from a wide supply range and provides a selectable 2.5 V or 3.0 V reference output. The AD7804BR-REEL is a 3 V to 5.5 V single-supply quad DAC. Designers should confirm exact supply and output requirements against the respective manufacturer datasheets before use.
Can the AD780BRZ be used as the reference for the AD7804BR-REEL in a system design?
Yes, in principle a precision reference such as the AD780BRZ can serve as an external reference for a DAC like the AD7804BR-REEL, provided the reference output voltage and the DAC's reference input requirements are compatible. The specific reference voltage, input range, and loading must be verified against both datasheets for the target design.
Which part is intended for analog output generation and which for voltage referencing?
The AD7804BR-REEL is the analog output device: it is a quad 10-bit DAC that generates four analog output voltages from digital codes. The AD780BRZ is the voltage referencing device: it produces a stable precision reference voltage. Their roles in a signal chain are complementary rather than equivalent.
Are the AD780BRZ and AD7804BR-REEL available in reel packaging?
The AD7804BR-REEL designation indicates tape-and-reel packaging for the AD7804 quad DAC. The AD780BRZ is identified by its part number and package code; packaging options should be confirmed from the manufacturer's ordering guide. Buyers should verify the exact orderable part number and packaging before production purchasing.