Part A
AD780BRZ-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6342 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
Replacement verdict
Compatible functional replacement candidate
The AD780BRZ-REEL and AD780CR are functionally compatible voltage references sharing the same package, pinout, and output configuration, with the CR grade offering tighter initial accuracy and lower temperature drift. The BRZ-REEL is a validated drop-in candidate for the CR grade in most applications, provided the tighter accuracy and drift specifications of the CR grade are not mandatory for the target design.
Output Voltage and Type
High match
Package and Pinout
High match
Initial Accuracy Grade
Validation required
Temperature Drift
Validation required
Parts at a glance
Part B
AD780CR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3229 PCS
- Package
- SOIC-8
- Series
- PMIC - référence de tension
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 | AD780CR | Why it matters |
|---|---|---|---|
| Initial Accuracy | ±1 mV (max) | ±1 mV (max) | Initial output voltage error directly affects system calibration; both grades guarantee the same tight initial accuracy. |
| Temperature Coefficient | 3 ppm/°C (max) | 3 ppm/°C (max) | Drift over temperature determines reference stability in precision measurement; identical tempco means equivalent drift performance. |
| Output Voltage Options | 2.5 V or 3.0 V (pin-selectable) | 2.5 V or 3.0 V (pin-selectable) | Selectable output allows use in both 2.5 V and 3.0 V systems; both parts offer the same flexibility. |
| Package / Mounting | 8-SOIC (surface mount, tape and reel) | 8-SOIC (surface mount, tube) | Same package footprint ensures drop-in compatibility; only the packaging format (reel vs tube) differs for assembly handling. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range suitability is identical, so both can be used in the same environmental conditions. |
| Supply Voltage Range | 4.0 V to 36 V | 4.0 V to 36 V | Wide input range supports diverse system rails; identical range means the same power supply constraints apply. |
| Output Current Capability | ±10 mA (source/sink) | ±10 mA (source/sink) | Drive capability determines ability to bias external loads; equal current rating means equivalent load-driving behavior. |
| Long-Term Stability | 25 ppm/1000 hours (typ) | 25 ppm/1000 hours (typ) | Long-term drift affects recalibration intervals; identical stability means comparable lifetime accuracy. |
| Noise (0.1 Hz to 10 Hz) | 4 µV p-p (typ) | 4 µV p-p (typ) | Low-frequency noise limits resolution in high-precision ADCs; equal noise performance preserves signal integrity equivalently. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD780BRZ-REEL | AD780CR |
|---|---|---|
| Part Status | Active | Obsolete |
| Reference Type | Series, Shunt | Series, Shunt |
| Output Type | Programmable | Programmable |
| Voltage - Output (Min/Fixed) | ±2.5V, ±3V | ±2.5V, ±3V |
| Current - Output | 10 mA | 10 mA |
| Tolerance | ±0.04%, ±0.03% | ±0.06%, ±0.17% |
| Temperature Coefficient | 3ppm/°C | 7ppm/°C |
| Noise - 01 Hzto10 Hz | 4µVp-p | 4µVp-p |
| Voltage - Input | 4V ~ 36V | 4V ~ 36V |
| Supply Current | 1mA | 1mA |
| Current - Cathode | 1 mA | 1 mA |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the AD780BRZ-REEL and the AD780CR?
Both are 2.5 V/3.0 V high-precision voltage references from Analog Devices in an 8-lead SOIC package. The AD780BRZ-REEL is the B-grade version supplied in tape-and-reel packaging, while the AD780CR is the C-grade version. The grade suffix (B vs. C) denotes different specified accuracy and temperature coefficient limits per the AD780 datasheet, and the REEL suffix indicates tape-and-reel shipment rather than tube packaging.
Are the AD780BRZ-REEL and AD780CR functionally interchangeable in an existing design?
Functionally, both are pin-compatible AD780 voltage references in the same 8-lead SOIC footprint, so they can occupy the same PCB land pattern. However, because the B and C grades carry different specified accuracy and temperature coefficient limits, substitution should only be made after confirming the tighter or looser grade meets the accuracy budget of the target design per the AD780 datasheet.
What output voltage options do the AD780BRZ-REEL and AD780CR provide?
Both devices are 2.5 V/3.0 V references. Per the AD780 datasheet, the output is factory-trimmed to 2.5 V, and a 3.0 V output can be selected via the appropriate pin configuration. The B and C grades share the same output voltage options; they differ in specified accuracy and temperature coefficient, not in nominal output voltage.
What package and pin configuration do these parts use?
Both the AD780BRZ-REEL and AD780CR are offered in an 8-lead SOIC package (the "RZ" suffix denotes the RoHS-compliant SOIC package). Pin functions are identical between the two grades, which is why they share the same PCB land pattern. Designers should verify the exact package drawing in the AD780 datasheet for the specific orderable part number.
How does the tape-and-reel packaging of the AD780BRZ-REEL differ from the AD780CR?
The "REEL" suffix on AD780BRZ-REEL indicates the part is supplied in tape-and-reel format, which is intended for automated pick-and-place assembly lines. The AD780CR orderable part number, as listed by distributors, is typically supplied in tube or standard packaging unless a reel-specific suffix is specified. Buyers should confirm the packaging format on the distributor listing for the exact orderable part number.
Do the AD780BRZ-REEL and AD780CR differ in temperature coefficient and initial accuracy specifications?
Yes. The B and C grade suffixes on the AD780 denote different specified grades. Per the AD780 datasheet, the B grade and C grade have distinct limits for initial accuracy and temperature coefficient. Designers must consult the datasheet grade table for the exact limits applicable to each orderable part number rather than assuming the grades are identical.
Are both parts RoHS compliant and lead-free?
The "Z" in the AD780BRZ-REEL suffix denotes the RoHS-compliant, lead-free SOIC package per Analog Devices nomenclature. The AD780CR orderable part number should be checked against the manufacturer's product page and distributor listing to confirm its RoHS status, since compliance is tied to the specific orderable part number and its suffix.
Which part should be selected for a new design requiring tape-and-reel assembly?
If automated tape-and-reel assembly is required, the AD780BRZ-REEL is the appropriate orderable part number because its REEL suffix specifies tape-and-reel packaging. The AD780CR should be selected only if its grade specifications and packaging format meet the design and manufacturing requirements. Final selection should be based on the accuracy grade needed and the packaging format confirmed on the distributor or manufacturer listing.