Part A
AD780BRZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3229 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
Replacement verdict
Not a drop-in replacement
The AD780BRZ and AD7805BR are not functionally interchangeable: the AD780BRZ is a precision 2.5 V/3.0 V voltage reference in an SOIC-8 package, while the AD7805BR is a quad 10-bit voltage-output DAC in a wide-body SOIC-28 package. Their core functions, channel counts, pinouts, and footprints differ fundamentally, so the AD7805BR cannot serve as a substitute for the AD780BRZ in an existing design.
Different device function
Different channel count
Different package and footprint
Different pinout
Parts at a glance
Part B
AD7805BR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4842 PCS
- Package
- SOIC-28
- Series
- Acquisition de données - convertisseur numérique - analogique (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 | AD7805BR | Why it matters |
|---|---|---|---|
| Function / 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 any design. |
| Package | 8-lead SOIC | 28-lead SOIC | Different footprint and pin count prevent board-level interchangeability. |
| Number of Channels / Outputs | 1 reference output | 4 DAC outputs | Channel count determines how many signals the device can generate or reference. |
| Output Voltage / Range | 2.5 V or 3.0 V selectable reference | 0 V to VREF (buffered voltage output) | The output voltage behavior defines the usable signal range in the target circuit. |
| Resolution | Not applicable (analog reference) | 10 bits | Resolution determines the granularity of the DAC output steps; a reference has no bit resolution. |
| Supply Voltage | 4.0 V to 36 V input | 5 V single supply (nominal) | Supply requirements must match the system power rail for the part to operate correctly. |
| Interface | Analog (no digital interface) | Parallel digital interface | A digital control interface is required to load DAC codes, which a voltage reference does not have. |
| Initial Accuracy | ±1 mV (B grade, 2.5 V) | ±1 LSB (INL/DNL specified) | Accuracy specifications define the precision of the output, though expressed differently for a reference versus a DAC. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both share the industrial temperature range, so thermal environment is not a differentiator here. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD780BRZ | 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 and AD7805BR functionally interchangeable?
No. The AD780BRZ is a 2.5 V/3.0 V high-precision voltage reference, while the AD7805BR is a quad 10-bit voltage-output DAC. They are different device categories and cannot be substituted for one another.
What is the AD780BRZ?
The AD780BRZ is a precision 2.5 V/3.0 V bandgap voltage reference from Analog Devices in an 8-lead SOIC package, specified with low initial error and low temperature drift for use in data acquisition and converter reference applications.
What is the AD7805BR?
The AD7805BR is a quad 10-bit voltage-output digital-to-analog converter from Analog Devices in a 28-lead SOIC package, featuring a parallel interface and an on-chip reference, intended for multichannel DAC applications.
Do the two parts have compatible package footprints?
No. The AD780BRZ is supplied in an 8-lead SOIC package, whereas the AD7805BR is supplied in a 28-lead SOIC package. Their pin counts and PCB land patterns differ, so they are not footprint-compatible.
Can the AD780BRZ serve as the reference for the AD7805BR?
This cannot be confirmed from verified public data. The AD7805BR includes its own on-chip reference, and no verified manufacturer documentation supports using the AD780BRZ as its external reference, so such a configuration should not be assumed.
Which part is intended for voltage reference applications?
The AD780BRZ is the voltage reference device, providing a stable 2.5 V or 3.0 V output. The AD7805BR is a DAC and is not a standalone voltage reference.
Which part provides multiple analog output channels?
The AD7805BR provides four 10-bit voltage-output DAC channels. The AD780BRZ provides a single reference voltage output and no DAC channels.
Are both parts from the same manufacturer?
Yes. Both the AD780BRZ and the AD7805BR are Analog Devices products, but they belong to different product families and serve different functions in a signal chain.