Part A
AD7892ARZ-1
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6834 PCS
- Package
- SOIC-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The AD7892ARZ-1 and AD7893BR-2 are not drop-in replacements for one another. Although both are 12-bit successive-approximation ADCs from Analog Devices, they differ in resolution-related architecture, input configuration, package footprint, and interface timing, so a direct board-level substitution is not possible without design changes.
Different input configuration
Different package footprint
Different interface timing
Different conversion architecture
Parts at a glance
Part B
AD7893BR-2
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5300 PCS
- Package
- SOIC-8
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | AD7892ARZ-1 | AD7893BR-2 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so nominal quantization resolution is equivalent for substitutability. |
| Number of ADC Inputs / Channels | 2 (single-ended, with 2-channel multiplexer) | 1 (single-ended) | The AD7892 offers a 2-channel input multiplexer, while the AD7893 is single-channel; this affects how many signals can be digitized without external muxing. |
| Sampling Rate | 500 kSPS | 117 kSPS | The AD7892 supports a much higher throughput, which matters for faster signal acquisition and bandwidth requirements. |
| Input Voltage Range | ±10 V (bipolar) | ±10 V (bipolar) | Both accept the same ±10 V bipolar input span, so analog front-end scaling can remain unchanged. |
| Interface Type | Parallel (12-bit word) | Serial (SPI/QSPI compatible) | The output interface differs fundamentally (parallel vs serial), which affects microcontroller/FPGA pin count and firmware design. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Both operate from a 5 V supply, so power rail requirements are compatible. |
| Package / Mounting | 24-lead SOIC (surface mount) | 8-lead SOIC (surface mount) | Different package footprints and pin counts mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ranges mean both suit the same environmental conditions. |
| Power Consumption | Approx. 60 mW (typical) | Approx. 25 mW (typical) | The AD7893 draws less power, which matters for thermally constrained or battery-influenced designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7892ARZ-1 | AD7893BR-2 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 500k | 117k |
| Number of Inputs | 2 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, Parallel | SPI |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7892ARZ-1 and AD7893BR-2?
The AD7892ARZ-1 is a 12-bit, 500 kSPS successive-approximation ADC with a parallel interface, while the AD7893BR-2 is a 12-bit, 117 kSPS ADC with a serial (SPI/QSPI-compatible) interface. The AD7892ARZ-1 offers faster throughput and a parallel bus, whereas the AD7893BR-2 provides a serial interface in a smaller package with lower power consumption.
Do the AD7892ARZ-1 and AD7893BR-2 have the same resolution and accuracy grade?
Both devices are 12-bit ADCs. The AD7892ARZ-1 is specified with ±1 LSB linearity error (A grade), and the AD7893BR-2 is specified with ±1 LSB linearity error (B grade). Both are 12-bit resolution converters, but their accuracy grades and timing specifications differ per their respective datasheets.
Can the AD7892ARZ-1 and AD7893BR-2 be used interchangeably in the same socket?
No. The AD7892ARZ-1 is offered in a 24-lead SOIC (RW package) with a parallel data bus, while the AD7893BR-2 is offered in an 8-lead SOIC (R-8 package) with a serial interface. The package footprints, pin counts, and interface architectures are different, so they are not pin-compatible or directly interchangeable.
How do the throughput rates of the AD7892ARZ-1 and AD7893BR-2 compare?
The AD7892ARZ-1 provides a 500 kSPS maximum throughput rate. The AD7893BR-2 provides a 117 kSPS maximum throughput rate. The AD7892ARZ-1 is therefore approximately four times faster and is better suited to higher-speed acquisition applications.
What are the analog input ranges for the AD7892ARZ-1 and AD7893BR-2?
The AD7892ARZ-1 offers a ±10 V bipolar input range (with a ±2.5 V option depending on the model suffix). The AD7893BR-2 offers a 0 V to +2.5 V unipolar input range. The input span and polarity differ, so signal conditioning must be matched to each device.
How do the power consumption and supply requirements differ between the two parts?
The AD7892ARZ-1 operates from a single +5 V supply and typically dissipates about 60 mW. The AD7893BR-2 operates from a single +5 V supply and typically dissipates about 25 mW. The AD7893BR-2 is the lower-power option, which suits battery-powered or power-sensitive designs.
Which device is better suited for a design requiring a serial interface?
The AD7893BR-2 is the appropriate choice for serial-interface designs, as it provides an SPI/QSPI-compatible serial output in an 8-lead package. The AD7892ARZ-1 uses a parallel interface and would require additional bus routing and microcontroller I/O pins.
Are the AD7892ARZ-1 and AD7893BR-2 specified over the same temperature range?
Both devices are specified for the industrial temperature range of −40°C to +85°C. Designers should confirm the exact grade suffix and temperature specification against the respective manufacturer datasheets before finalizing a design.