Part A
AD780ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3641 PCS
- Package
- SOIC-8
- Series
- PMIC - Voltage Reference
Replacement verdict
Not a drop-in replacement
The AD780ARZ and AD7804BR-REEL are not functionally interchangeable. The AD780ARZ 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 an SOIC-16 package. They differ in core function, channel count, package footprint, and pinout, so substituting one for the other is not feasible without a complete circuit redesign.
Different device function
Different channel count
Different package footprint
Different pinout
Parts at a glance
Part B
AD7804BR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9709 PCS
- Package
- SOIC-16
- Series
- Data Acquisition - Digital to Analog Converters (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 | AD780ARZ | 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, so they are not functionally substitutable in a design. |
| Output Type | Fixed reference voltage output | Digital-to-analog converter output (voltage) | A reference provides a stable DC level, while a DAC converts digital codes to analog levels; the roles differ completely. |
| Number of Channels | 1 | 4 | Channel count determines how many independent outputs the part can provide. |
| Resolution / Output Accuracy | 2.5 V or 3.0 V output, high initial accuracy | 10-bit DAC resolution | Resolution and accuracy define the precision achievable in the target application. |
| Digital Interface | None (analog reference) | Serial digital interface | A DAC requires a digital control bus, whereas a reference has no digital interface, affecting system architecture. |
| Supply Voltage | Wide supply range (approx. 4 V to 36 V) | Single low-voltage supply (approx. 2.7 V to 5.5 V) | Supply compatibility determines whether the part can operate in the target power rail environment. |
| Package | 8-lead SOIC | 16-lead SOIC | Package footprint and pin count affect PCB layout and cannot be swapped without redesign. |
| Operating Temperature Range | Industrial (-40 °C to +85 °C) | Industrial (-40 °C to +85 °C) | Both share the same temperature range, so environmental tolerance is comparable. |
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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 | AD780ARZ | 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 | ±0.2%, ±0.17% | - |
| Temperature Coefficient | 7ppm/°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 AD780ARZ and AD7804BR-REEL functionally interchangeable?
No. The AD780ARZ 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 primary functions of each device?
The AD780ARZ is a precision bandgap voltage reference offering selectable 2.5 V or 3.0 V output with low temperature drift. The AD7804BR-REEL is a quad, 10-bit digital-to-analog converter with a serial interface, designed to convert digital codes into analog output voltages.
How do the package and pin count differ between the two parts?
The AD780ARZ is supplied in an 8-lead SOIC package. The AD7804BR-REEL is supplied in a 16-lead SOIC package in tape-and-reel format. The differing pin counts and land patterns mean the two devices are not footprint-compatible.
Do the two parts share the same supply voltage requirements?
No. The AD780ARZ operates from a supply that supports its 2.5 V/3.0 V reference output with specified headroom, while the AD7804BR-REEL is a 5 V-class DAC designed for operation from a nominal 5 V supply. Designers must verify each device's datasheet supply range independently.
Can the AD780ARZ serve as the reference for the AD7804BR-REEL in a mixed-signal design?
Yes, in principle a precision reference such as the AD780ARZ can provide the reference voltage for a DAC like the AD7804BR-REEL, provided the reference output level and the DAC's reference input requirements are compatible. The specific configuration must be validated against both datasheets.
Which part is intended for voltage reference applications and which for digital-to-analog conversion?
The AD780ARZ is intended for voltage reference applications such as ADC/DAC references, precision power supplies, and instrumentation. The AD7804BR-REEL is intended for digital-to-analog conversion in applications requiring multiple 10-bit DAC channels with a serial control interface.
Are the operating temperature ranges of the two devices the same?
Both parts are specified for industrial temperature range operation, but the exact specified limits should be confirmed from the respective manufacturer datasheets. The AD780ARZ and AD7804BR-REEL are distinct products, and their temperature specifications must be verified individually rather than assumed identical.