Part A
AD7892BRZ-1
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6270 個数
- Package
- SOP-24
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Not a drop-in replacement
The AD7892BRZ-1 and AD7895AR-2 are not drop-in replacements for one another. Although both are Analog Devices 12-bit successive-approximation ADCs, they differ in resolution-adjacent architecture, input configuration, package footprint, and interface timing, so substituting one for the other requires board-level redesign and firmware validation rather than direct replacement.
Different input configuration
Different package footprint
Different interface timing
Different conversion architecture
Parts at a glance
Part B
AD7895AR-2
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3173 個数
- Package
- SOIC-8
- 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 | AD7892BRZ-1 | AD7895AR-2 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so nominal quantization resolution is equivalent for substitutability. |
| Number of Input Channels | 2 (single-ended) | 1 (single-ended) | Channel count determines how many analog signals can be digitized; the AD7892 offers two channels versus one on the AD7895. |
| Sampling Rate | 500 kSPS | 200 kSPS | Maximum throughput affects the bandwidth of signals that can be captured; the AD7892 is significantly faster. |
| Input Voltage Range | ±10 V (bipolar) | 0 V to 2.5 V (unipolar) | Input range must match the sensor or signal chain; bipolar ±10 V versus unipolar 0–2.5 V changes front-end conditioning requirements. |
| Interface Type | Parallel | Serial (SPI/QSPI/MICROWIRE compatible) | The digital interface must match the host controller; parallel versus serial output requires different board routing and firmware. |
| Supply Voltage | 5 V | 5 V | Both operate from a single 5 V supply, simplifying power-rail compatibility in substitution. |
| Package | 24-lead SOIC (SOIC_W) | 8-lead SOIC (SOIC_N) | Package footprint and pin count differ, so a board redesign or adapter is required for direct replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both suit the same environmental conditions. |
| Reference Type | Internal reference | External reference | Reference architecture affects accuracy and external component count; the AD7892 includes an internal reference while the AD7895 requires an external one. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7892BRZ-1 | AD7895AR-2 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 500k | 192k |
| 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 AD7895AR-2?
The AD7892BRZ-1 is a 12-bit successive-approximation ADC with a 500 kSPS throughput rate, offering a 0 V to +2.5 V (or ±2.5 V) input range and an on-chip track/hold amplifier, housed in a 24-lead SOIC. The AD7895AR-2 is a 12-bit successive-approximation ADC with a 200 kSPS throughput rate, featuring a 0 V to +2.5 V input range and an on-chip track/hold, housed in an 8-lead SOIC. The primary differences are speed (500 kSPS vs 200 kSPS), package size (24-lead vs 8-lead SOIC), and the AD7892BRZ-1's additional flexibility in input range configuration.
Can the AD7895AR-2 be used as a drop-in replacement for the AD7892BRZ-1?
No. The two devices have different package footprints (24-lead SOIC vs 8-lead SOIC), different pinouts, and different throughput rates (500 kSPS vs 200 kSPS). A direct drop-in replacement is not possible without PCB redesign and validation of timing and interface requirements against the target design.
What are the throughput rates of the AD7892BRZ-1 and AD7895AR-2?
The AD7892BRZ-1 offers a 500 kSPS throughput rate, while the AD7895AR-2 offers a 200 kSPS throughput rate. Both are 12-bit successive-approximation ADCs, but the AD7892BRZ-1 provides higher sampling speed for faster signal acquisition applications.
What input voltage ranges do these two ADCs support?
The AD7892BRZ-1 supports a 0 V to +2.5 V input range (with a ±2.5 V option depending on the grade/configuration), while the AD7895AR-2 supports a 0 V to +2.5 V input range. Designers should confirm the exact input configuration from the respective manufacturer datasheets for their specific grade.
How do the package options differ between the AD7892BRZ-1 and AD7895AR-2?
The AD7892BRZ-1 is supplied in a 24-lead SOIC package, whereas the AD7895AR-2 is supplied in an 8-lead SOIC package. The smaller 8-lead package of the AD7895AR-2 suits space-constrained designs, while the 24-lead package of the AD7892BRZ-1 accommodates additional control and interface pins.
Do both devices include an on-chip track/hold amplifier?
Yes. Both the AD7892BRZ-1 and AD7895AR-2 integrate an on-chip track/hold amplifier, which allows accurate sampling of high-frequency input signals without requiring an external sample-and-hold circuit. This is a common feature of the Analog Devices AD789x successive-approximation ADC family.
Which device is better suited for high-speed data acquisition systems?
The AD7892BRZ-1 is better suited for high-speed data acquisition because its 500 kSPS throughput rate is more than double that of the AD7895AR-2 (200 kSPS). For applications requiring faster sampling and higher bandwidth signal capture, the AD7892BRZ-1 is the appropriate choice, provided the larger 24-lead package is acceptable.
Are both ADCs 12-bit resolution devices?
Yes. Both the AD7892BRZ-1 and AD7895AR-2 are 12-bit successive-approximation analog-to-digital converters, providing 12-bit resolution over their respective input ranges. The resolution is identical; the differences lie in throughput rate, package, and input range configuration.