Part A
AD7892ARZ-1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6834 個数
- Package
- SOIC-24
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7892ARZ-1 and AD7892BR-2 are functionally compatible 12-bit successive-approximation ADCs sharing the same package, pinout, and analog input architecture, making the AD7892BR-2 a viable functional replacement candidate for the AD7892ARZ-1 in most designs. The primary distinction lies in grade-level performance specifications, particularly linearity and dynamic accuracy, so designers should validate that the tighter or differing grade tolerances of the BR-2 variant satisfy the target application's accuracy budget before committing to substitution.
Package Type
High match
Pin Configuration
High match
Resolution and Architecture
High match
Grade-Level Accuracy Specifications
Validation required
Parts at a glance
Part B
AD7892BR-2
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9420 個数
- Package
- SOIC-24
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | AD7892BR-2 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so digital output word width is identical and no firmware scaling change is required. |
| Sampling Rate | 500 kSPS | 500 kSPS | Identical throughput means timing budgets and anti-aliasing filter design remain unchanged. |
| Input Type | Single-ended | Single-ended | Same input configuration allows direct substitution without reworking the analog front end. |
| Number of Input Channels | 1 | 1 | Both are single-channel devices, so multiplexing requirements are unchanged. |
| Input Voltage Range | ±10 V | ±10 V | Matching full-scale range preserves signal scaling and avoids recalibration of the measurement chain. |
| Supply Voltage | 5 V | 5 V | Same single 5 V supply simplifies power rail design and ensures pin-compatible operation. |
| Interface Type | Parallel | Parallel | Identical parallel interface means the host bus timing and glue logic do not need modification. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range ensures both parts meet the same environmental requirements. |
| Package / Mounting | 20-SOIC (surface mount) | 20-SOIC (surface mount) | Identical package and footprint allow drop-in replacement on the same PCB land pattern. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7892ARZ-1 | AD7892BR-2 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 500k | 500k |
| 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 AD7892ARZ-1 and AD7892BR-2?
The AD7892ARZ-1 and AD7892BR-2 are both 12-bit, 500 kSPS successive-approximation ADCs from Analog Devices, but they differ in grade and package. The AD7892ARZ-1 is specified for the commercial temperature range (0°C to +70°C) and is supplied in a 24-lead SOIC (R-24) package. The AD7892BR-2 is specified for the industrial temperature range (−40°C to +85°C) and is supplied in a 24-lead PDIP (N-24) package. The "B" grade also carries tighter linearity and accuracy specifications than the "A" grade.
Are the AD7892ARZ-1 and AD7892BR-2 pin-compatible?
No. The AD7892ARZ-1 uses a 24-lead SOIC (R-24) surface-mount package, while the AD7892BR-2 uses a 24-lead PDIP (N-24) through-hole package. Although both are 24-lead devices with the same signal functions, the package footprints and PCB land patterns differ, so they are not drop-in replacements for one another.
What are the resolution and throughput specifications of these ADCs?
Both the AD7892ARZ-1 and AD7892BR-2 are 12-bit successive-approximation analog-to-digital converters with a maximum throughput of 500 kSPS. They feature a fast conversion time and an on-chip track-and-hold amplifier, making them suitable for high-speed data acquisition applications.
What analog input ranges do the AD7892ARZ-1 and AD7892BR-2 support?
Both devices are available in versions supporting either a ±10 V bipolar input range or a 0 V to +2.5 V unipolar input range, depending on the specific model suffix. The input range should be confirmed against the exact ordering code in the Analog Devices datasheet before design use.
What is the difference in operating temperature range between the two parts?
The AD7892ARZ-1 is specified over the commercial temperature range of 0°C to +70°C. The AD7892BR-2 is specified over the industrial temperature range of −40°C to +85°C, making it the appropriate choice for industrial and extended-temperature environments.
What supply voltage and interface do these ADCs require?
Both the AD7892ARZ-1 and AD7892BR-2 operate from a single +5 V supply and include a high-speed parallel interface for connection to microprocessors and DSPs. The parallel output is 12 bits wide, allowing direct interfacing without external glue logic in most systems.
Can the AD7892BR-2 be used as a replacement for the AD7892ARZ-1 in an existing design?
Not directly. Because the AD7892BR-2 is a 24-lead PDIP and the AD7892ARZ-1 is a 24-lead SOIC, the PCB footprint must be changed. Additionally, the "B" grade offers tighter accuracy specifications than the "A" grade, so the design's error budget and layout should be revalidated against the Analog Devices datasheet before substitution.
Which grade should be selected for an industrial application?
The AD7892BR-2 is the better choice for industrial applications because it is specified over the −40°C to +85°C industrial temperature range and carries the tighter "B" grade linearity and accuracy specifications. The AD7892ARZ-1, rated for 0°C to +70°C, is intended for commercial-temperature environments.