Part A
AD780BRZ-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 6342 件
- Package
- SOIC-8
- Series
- PMIC-電壓參攷
Replacement verdict
Not a drop-in replacement
The AD780BRZ-REEL and AD7805BR are not functionally interchangeable. The AD780BRZ-REEL is a high-precision 2.5 V voltage reference in an SOIC-8 package, while the AD7805BR is a quad 10-bit voltage-output DAC in a 28-lead SSOP. They differ in core function, channel count, package footprint, and digital interface, so substituting one for the other is not feasible without a complete redesign.
Different device function
Different channel count
Different package footprint
Different digital interface
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 | AD7805BR | 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, so they are not functionally substitutable in a design. |
| Output Type | Fixed reference voltage output | Four voltage-output DAC 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 analog signals the part can generate or supply. |
| Resolution | Not applicable (reference, no digital resolution) | 10 bits | Resolution defines the DAC's step size and achievable output granularity; a reference has no digital resolution spec. |
| Digital Interface | None (analog-only device) | Parallel digital input | The DAC requires a digital bus to load codes, whereas the reference needs no digital control interface. |
| Supply Voltage | 4.0 V to 36 V input range | 5 V single supply (nominal) | Supply requirements must match the board rail; the wide-input reference and the 5 V DAC are not interchangeable on power. |
| Package | 8-lead SOIC | 28-lead SOIC (wide body) | Footprint and pin count differ, so neither part can drop into the other's PCB land pattern. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both cover the industrial range, so thermal environment is not a differentiator here. |
| Typical Application Role | Precision system reference for ADCs/DACs | Multichannel analog output generation | Their roles in a signal chain differ, so substituting one for the other would not preserve circuit function. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD780BRZ-REEL | AD7805BR |
|---|---|---|
| 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 AD7805BR functionally interchangeable?
No. The AD780BRZ-REEL is a 2.5 V/3.0 V high-precision voltage reference in an SOIC-8 package, while the AD7805BR is a quad 10-bit voltage-output DAC in a 28-lead SOIC package. They are different functional classes of devices 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 low initial error and low temperature drift, intended for use as a reference source in data acquisition and conversion systems.
What is the primary function of the AD7805BR?
The AD7805BR is a quad, 10-bit, voltage-output digital-to-analog converter with a parallel interface, designed for applications requiring multiple DAC channels in a single package.
Do the AD780BRZ-REEL and AD7805BR use the same package and pinout?
No. The AD780BRZ-REEL is supplied in an 8-lead SOIC package, whereas the AD7805BR is supplied in a 28-lead SOIC package. Their pin counts, pin functions, and PCB land patterns differ, so they are not footprint-compatible.
Can the AD780BRZ-REEL serve as the reference for the AD7805BR in a system design?
Yes, in principle a precision reference such as the AD780BRZ-REEL can be used to supply the reference voltage for the AD7805BR, provided the reference output voltage and drive capability are validated against the AD7805BR reference input requirements in the respective datasheets.
Are both devices rated for the same supply voltage range?
No. The AD780BRZ-REEL operates from a supply compatible with its 2.5 V/3.0 V reference output (nominally a 4.0 V to 36 V input range per its datasheet), while the AD7805BR operates from a 5 V supply. The supply requirements are not interchangeable and must be verified individually from the manufacturer datasheets.
Which device is appropriate for a multi-channel analog output application?
The AD7805BR is the appropriate choice, as it integrates four 10-bit voltage-output DACs in a single package. The AD780BRZ-REEL is a voltage reference only and provides no DAC channels.
Which device is appropriate when a stable reference voltage is required?
The AD780BRZ-REEL is the appropriate choice, as it is a dedicated precision voltage reference. The AD7805BR is a DAC and does not serve as a standalone precision reference source.