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 AD7892AR-2 share the same 12-bit ADC architecture, 5 V supply, and 24-pin SOIC footprint, making them functionally interchangeable in most designs. The primary distinction is the input configuration: the ARZ-1 provides a single-ended input, while the AR-2 offers a pseudo-differential input, so the correct choice depends on the signal conditioning topology of the target application. Both parts are specified for the same temperature range and interface timing, so substitution is viable provided the input configuration is validated against the system requirements.
Resolution and Architecture
High match
Package and Pinout
High match
Input Configuration
Validation required
Supply Voltage and Interface
High match
Parts at a glance
Part B
AD7892AR-2
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 9769 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 | AD7892AR-2 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both parts share 12-bit resolution, so conversion accuracy class is equivalent for substitutability. |
| Sampling Rate | 500 kSPS | 500 kSPS | Identical throughput means either device can meet the same acquisition timing requirements. |
| Input Type | Single-ended | Single-ended | Matching input configuration allows the same signal chain topology to be reused. |
| Number of Input Channels | 1 | 1 | Same channel count ensures the same number of analog sources can be digitized without external multiplexing changes. |
| Input Voltage Range | ±10 V | ±10 V | Equivalent full-scale input range preserves signal scaling and front-end conditioning design. |
| Supply Voltage | 5 V | 5 V | Same single 5 V supply simplifies power rail compatibility and board-level substitution. |
| Interface Type | Parallel | Parallel | Identical parallel interface allows the same host bus and timing logic to be used. |
| Package / Mounting | 20-SOIC (Surface Mount) | 20-SOIC (Surface Mount) | Same package and footprint enable direct drop-in replacement on existing PCB layouts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental robustness for the target application. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7892ARZ-1 | AD7892AR-2 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 500k | 500k |
| Number of Inputs | 2 | 2 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, Parallel | SPI, Parallel |
| 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, Internal |
| 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 AD7892AR-2?
The AD7892ARZ-1 and AD7892AR-2 are both 12-bit, 500 kSPS successive-approximation ADCs from Analog Devices in a 24-lead SOIC package, but they differ in their analog input configuration and external reference requirements. The AD7892ARZ-1 provides a bipolar ±10 V input range with an on-chip reference, while the AD7892AR-2 offers a unipolar 0 V to +2.5 V input range and requires an external reference. The suffix "-1" and "-2" denote these different input/reference options within the AD7892 family.
Are the AD7892ARZ-1 and AD7892AR-2 pin-compatible?
Both devices are supplied in the same 24-lead SOIC (R-24) package and share the same pinout for digital and control functions, but the analog input and reference pins are configured differently between the two versions. Therefore, while the package footprint is identical, the two parts are not functionally interchangeable without accounting for the differing input range and reference requirements.
What is the resolution and throughput of the AD7892ARZ-1 and AD7892AR-2?
Both the AD7892ARZ-1 and AD7892AR-2 are 12-bit successive-approximation analog-to-digital converters with a maximum throughput rate 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 range does each version support?
The AD7892ARZ-1 accepts a bipolar ±10 V analog input range, which is convenient for industrial signal levels. The AD7892AR-2 accepts a unipolar 0 V to +2.5 V input range. Designers must select the version whose input range matches the sensor or signal chain to avoid clipping or loss of resolution.
Do these converters include an internal voltage reference?
The AD7892ARZ-1 includes an on-chip reference, simplifying the design and reducing external component count. The AD7892AR-2 does not include an internal reference and requires an external 2.5 V reference to be supplied by the user. This difference affects board layout and BOM cost.
What digital interface do the AD7892ARZ-1 and AD7892AR-2 provide?
Both devices provide a high-speed parallel digital interface for direct connection to microprocessors and DSPs, along with a conversion start input and a busy/status output. The interface timing and control signals are common across the AD7892 family, so the digital host connection is the same for both versions.
What are the typical power supply requirements for these ADCs?
Both the AD7892ARZ-1 and AD7892AR-2 operate from a single +5 V analog and digital supply. The AD7892ARZ-1, with its ±10 V input range, requires the +5 V supply plus the on-chip reference to handle the wider bipolar input, while the AD7892AR-2 operates from +5 V with an external 2.5 V reference. Power consumption is specified in the respective datasheets and is comparable between the two versions.
Can the AD7892ARZ-1 be used as a drop-in replacement for the AD7892AR-2?
No. Although both are 12-bit, 500 kSPS ADCs in the same 24-lead SOIC package, the AD7892ARZ-1 has a ±10 V bipolar input range and an internal reference, whereas the AD7892AR-2 has a 0 V to +2.5 V unipolar input range and requires an external reference. Substituting one for the other would change the input signal scaling and reference architecture, so the circuit and firmware must be redesigned and validated accordingly.
What are typical applications for the AD7892ARZ-1 versus the AD7892AR-2?
The AD7892ARZ-1, with its ±10 V bipolar input and internal reference, is well suited to industrial process control, motor control, and data acquisition systems where bipolar sensor signals are common. The AD7892AR-2, with its 0 V to +2.5 V unipolar input and external reference, is suited to applications with unipolar signal chains or where a system-level reference is shared across multiple converters. Both are used in instrumentation, medical, and communications equipment requiring 12-bit, 500 kSPS conversion.