Part A
AD7892BRZ-1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6270 PCS
- Package
- SOP-24
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7892BRZ-1 and AD7894BR-10 are both 12-bit successive-approximation ADCs from Analog Devices in a 24-lead SOIC package, sharing a comparable serial interface and supply architecture. However, they differ in input channel configuration, throughput rate, and analog input range, so the AD7894BR-10 can serve as a functional substitute only after validating channel count, sampling rate, and input span requirements against the target design.
Resolution
High match
Input Channel Configuration
Validation required
Throughput Rate
Validation required
Package Type
High match
Parts at a glance
Part B
AD7894BR-10
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6891 PCS
- Package
- SOIC-8
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7892BRZ-1 | AD7894BR-10 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 14 bit | Higher resolution provides finer quantization steps, which directly affects measurement accuracy and dynamic range in the application. |
| Number of ADC Inputs | 2 (single-ended) | 1 (single-ended) | The channel count determines how many analog signals can be digitized without external multiplexing, affecting system architecture. |
| Sampling Rate | 500 kSPS | 200 kSPS | Maximum throughput limits the bandwidth of signals that can be captured and constrains the anti-aliasing filter design. |
| Input Voltage Range | ±10 V (bipolar) | ±10 V (bipolar) | The full-scale input span must match the sensor or signal source to avoid clipping or loss of resolution. |
| Interface Type | Parallel | Serial (SPI/QSPI/MICROWIRE compatible) | The digital interface must be compatible with the host processor or FPGA, and it affects pin count and board routing. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Supply voltage must match the system power rails and influences the analog input range and logic levels. |
| Package | 24-Lead SOIC | 8-Lead SOIC | Package footprint and pin count affect PCB layout, thermal behavior, and mechanical fit in existing designs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment to guarantee specified performance and reliability. |
| Power Consumption | Approx. 60 mW (typical) | Approx. 20 mW (typical) | Power dissipation affects thermal design and is critical in battery-powered or thermally constrained systems. |
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 | AD7892BRZ-1 | AD7894BR-10 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 14 |
| Sampling Rate(Per Second) | 500k | 200k |
| Number of A/D Converters | 1 | 1 |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Number of Inputs | 2 | - |
| Input Type | Single Ended | - |
| Data Interface | SPI, Parallel | - |
| Configuration | S/H-ADC | - |
| Ratio - S / H: ADC | 1:1 | - |
| Architecture | SAR | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 5V | - |
Frequently asked questions
What are the key differences between the AD7892BRZ-1 and AD7894BR-10?
The AD7892BRZ-1 is a 12-bit, 500 kSPS ADC with a parallel interface, while the AD7894BR-10 is a 14-bit, 200 kSPS ADC with a serial (SPI-compatible) interface. The AD7892BRZ-1 offers faster throughput and a parallel bus, whereas the AD7894BR-10 provides higher resolution and a serial interface in a smaller package.
Do the AD7892BRZ-1 and AD7894BR-10 have the same resolution and sampling rate?
No. The AD7892BRZ-1 provides 12-bit resolution at up to 500 kSPS, while the AD7894BR-10 provides 14-bit resolution at up to 200 kSPS. The AD7894BR-10 trades throughput for higher resolution.
What input voltage range does the AD7894BR-10 support compared with the AD7892BRZ-1?
The AD7894BR-10 is specified for a ±10 V input range (the "-10" suffix denotes the ±10 V input option). The AD7892BRZ-1 is specified for a ±10 V input range as well. Both devices accept bipolar ±10 V analog inputs, but confirm the exact input configuration in the respective datasheets before design.
Are the AD7892BRZ-1 and AD7894BR-10 pin-compatible?
No. The AD7892BRZ-1 is offered in a 24-lead SOIC (RW package) with a parallel data bus, while the AD7894BR-10 is offered in a 24-lead SOIC (R package) with a serial interface. The pin functions and interface signals differ, so they are not direct drop-in replacements.
What interface does each device use to connect to a microcontroller or DSP?
The AD7892BRZ-1 uses a parallel interface with a 12-bit data bus, suitable for direct connection to parallel buses on processors and DSPs. The AD7894BR-10 uses a serial interface compatible with SPI/QSPI/MICROWIRE, requiring fewer I/O pins and suited to serial-port-based systems.
What are the power supply requirements for the AD7892BRZ-1 and AD7894BR-10?
Both devices operate from a single +5 V supply for the analog and digital sections, with the AD7892BRZ-1 also supporting a separate +5 V digital supply. Refer to the manufacturer datasheets for exact supply tolerances and decoupling requirements before finalizing the design.
Can the AD7894BR-10 replace the AD7892BRZ-1 in an existing design?
Not directly. The AD7894BR-10 has a different resolution (14-bit vs 12-bit), a lower maximum sampling rate (200 kSPS vs 500 kSPS), a serial rather than parallel interface, and different pin functions. A replacement requires redesign of the digital interface, timing, and PCB layout, and must be validated against the target system requirements.
Which device is better suited for high-speed data acquisition versus high-resolution measurement?
The AD7892BRZ-1, with 500 kSPS throughput and a parallel interface, is better suited to higher-speed data acquisition where bus bandwidth is available. The AD7894BR-10, with 14-bit resolution and a serial interface, is better suited to high-resolution measurement systems where pin count and resolution are prioritized over maximum sample rate.