Part A
AD780BRZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6342 Stückzahl
- Package
- SOIC-8
- Series
- PMIC Spannung Referenz
Replacement verdict
Not a drop-in replacement
The AD780BRZ-REEL and AD7805CR are not functionally interchangeable. The AD780BRZ-REEL is a high-precision 2.5 V/3.0 V voltage reference in an SOIC-8 package, while the AD7805CR is a quad 10-bit voltage-output DAC in a 28-lead PLCC package. They differ in core function, channel count, package footprint, and supply/interface requirements, so substituting one for the other is not feasible without a complete redesign.
Different device function
Different channel count
Different package footprint
Different interface type
Parts at a glance
Part B
AD7805CR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4925 Stückzahl
- Package
- SOIC-28
- Series
- Data Acquisition von 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 | AD780BRZ-REEL | AD7805CR | Why it matters |
|---|---|---|---|
| Function / Product Type | Voltage reference (2.5 V / 3.0 V ultrahigh precision) | 10-bit quad voltage-output DAC | These are fundamentally different device classes (reference vs. DAC), so they are not functionally substitutable in a design. |
| Output Type | Fixed voltage reference output | Voltage output DAC (four channels) | A reference provides a stable DC level, while a DAC converts digital codes to analog voltages; the output behavior differs completely. |
| Number of Channels | 1 | 4 | Channel count determines how many independent signals the device can provide in a system. |
| Resolution / Output Voltage | 2.5 V or 3.0 V selectable reference | 10-bit resolution | The reference specifies a fixed output level, whereas the DAC specifies quantization resolution for programmable outputs. |
| Digital Interface | None (analog-only device) | Parallel digital input | The DAC requires a digital bus to load codes; the reference has no digital control, affecting system architecture and pinout. |
| Supply Voltage | 4.0 V to 36 V input range | 5 V single supply (nominal) | Supply requirements must match the board rail; mismatched ranges can prevent operation or require redesign. |
| Package | 8-lead SOIC | 28-lead SOIC (wide body) | Footprint and pin count must match the PCB layout for a drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | Temperature grade affects suitability for industrial versus commercial environments. |
| Typical Application Role | Precision reference for ADCs/DACs and instrumentation | Multichannel analog output generation and control | Their roles in a signal chain differ, so one cannot directly replace the other in circuit function. |
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 | AD7805CR |
|---|---|---|
| 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 | - | Parallel |
| 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-REEL and AD7805CR functionally interchangeable?
No. The AD780BRZ-REEL is a 2.5 V/3.0 V high-precision voltage reference in an 8-lead SOIC package, while the AD7805CR is a quad 10-bit voltage-output DAC with a parallel interface in a 28-lead SOIC package. They are different device categories and cannot be substituted for one another.
What is the primary function of the AD780BRZ-REEL?
The AD780BRZ-REEL is a precision bandgap voltage reference offering a selectable 2.5 V or 3.0 V output, with initial accuracy grades and low temperature drift specified in the Analog Devices AD780 datasheet. It is supplied in an 8-lead SOIC package and provided on tape and reel.
What is the primary function of the AD7805CR?
The AD7805CR is a quad, 10-bit, voltage-output digital-to-analog converter with a parallel microprocessor-compatible interface, specified in the Analog Devices AD7805 datasheet. It is housed in a 28-lead SOIC package.
Do the AD780BRZ-REEL and AD7805CR use the same package and pinout?
No. The AD780BRZ-REEL uses an 8-lead SOIC package, whereas the AD7805CR uses a 28-lead SOIC package. The pin counts, pin functions, and PCB land patterns differ, so neither part is a drop-in replacement for the other.
Can the AD780BRZ-REEL be used as the reference for the AD7805CR in a DAC design?
This cannot be confirmed from verified public data without reviewing the specific AD7805CR reference-input requirements and the AD780BRZ-REEL output specifications in the respective Analog Devices datasheets. Designers should verify reference voltage, compliance, and loading conditions against both datasheets before combining the parts.
Which part is supplied in tape-and-reel packaging?
The AD780BRZ-REEL is specified by Analog Devices as a tape-and-reel product, as indicated by the "REEL" suffix. The AD7805CR ordering code does not denote tape-and-reel packaging in the same manner; packaging details should be confirmed from the Analog Devices ordering guide.
Are both parts manufactured by Analog Devices?
Yes. Both the AD780 and AD7805 product families are listed in Analog Devices documentation, and the "AD" prefix and part numbering are consistent with Analog Devices nomenclature.
What key specification distinguishes these two parts for a design engineer?
The AD780BRZ-REEL is a voltage reference that provides a stable DC reference voltage, while the AD7805CR is a quad 10-bit DAC that converts digital codes to analog output voltages. Selection depends on whether the design requires a reference source or a multi-channel DAC function.