Part A
AD7892ARZ-1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6834 PCS
- Package
- SOIC-24
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7892ARZ-1 and AD7899BR-1 are both 12-bit successive-approximation ADCs from Analog Devices, but they differ in resolution-adjacent architecture, sampling rate, input configuration, and package. The AD7892ARZ-1 offers a faster 500 kSPS throughput with a single-ended input and a 24-pin SOIC package, while the AD7899BR-1 provides a 400 kSPS rate with a differential input and a 28-pin SSOP package. Because the input topology and footprint differ, the AD7899BR-1 is not a direct drop-in replacement, but it can serve as a functional substitute in designs where the differential input and board layout can be accommodated.
Sampling Rate
Validation required
Input Configuration
Not compatible
Package Type
Not compatible
Resolution
High match
Parts at a glance
Part B
AD7899BR-1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4423 PCS
- Package
- SOIC-28
- 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 | AD7892ARZ-1 | AD7899BR-1 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 14 bit | Higher resolution provides finer quantization and better dynamic range, which directly affects measurement accuracy and substitutability in precision applications. |
| Sampling Rate | 500 kSPS | 400 kSPS | Maximum throughput determines the highest signal frequency that can be digitized, so a slower part may not meet timing requirements of the original design. |
| Number of Input Channels | 1 (single-ended) | 1 (single-ended) | Channel count defines how many analog signals can be multiplexed into the converter; matching this ensures the same signal routing architecture can be reused. |
| Input Voltage Range | ±10 V (bipolar) | ±10 V (bipolar) | The full-scale input span must match the sensor or signal chain to avoid clipping or loss of resolution when swapping parts. |
| Supply Voltage | 5 V single supply | 5 V single supply | Supply requirements determine power-rail compatibility; identical supplies simplify drop-in replacement without redesigning the power section. |
| Interface Type | Parallel | Parallel | The digital interface must match the host controller's bus to allow direct connection without glue logic or firmware changes. |
| Package / Mounting | 20-Lead SOIC (surface mount) | 28-Lead SOIC (surface mount) | Package footprint and pin count affect PCB layout compatibility; differing packages require board redesign and cannot be directly substituted. |
| 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 over the operating life. |
| Power Consumption | ~60 mW (typical) | ~100 mW (typical) | Power dissipation impacts thermal budget and supply sizing; a higher-consumption part may exceed the original design's power envelope. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7892ARZ-1 | AD7899BR-1 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 14 |
| Sampling Rate(Per Second) | 500k | 400k |
| Number of Inputs | 2 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, Parallel | 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 AD7899BR-1?
The AD7892ARZ-1 is a 12-bit, 500 kSPS ADC with a parallel interface, while the AD7899BR-1 is a 14-bit, 400 kSPS ADC with a parallel interface. The AD7892ARZ-1 offers higher throughput at lower resolution, whereas the AD7899BR-1 provides higher resolution at a slightly lower sampling rate. Both are single-supply 5 V devices in 24-lead SOIC packages, but they differ in resolution, speed, and internal architecture.
Are the AD7892ARZ-1 and AD7899BR-1 pin-compatible?
No. Although both devices are housed in 24-lead SOIC packages, their pin functions and internal architectures differ. The AD7892ARZ-1 and AD7899BR-1 are not pin-compatible, so a direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What is the resolution and sampling rate of each device?
The AD7892ARZ-1 provides 12-bit resolution with a maximum throughput of 500 kSPS. The AD7899BR-1 provides 14-bit resolution with a maximum throughput of 400 kSPS. Selection depends on whether higher resolution (AD7899BR-1) or higher speed (AD7892ARZ-1) is required by the application.
What analog input ranges do these ADCs support?
The AD7892ARZ-1 supports a bipolar ±10 V input range (with the appropriate input configuration per its datasheet). The AD7899BR-1 supports a bipolar ±10 V input range as well. Both devices are designed for industrial signal acquisition where wide bipolar input swings are common, but designers should confirm the exact input configuration and reference requirements in each datasheet.
What supply voltage and interface do these devices require?
Both the AD7892ARZ-1 and AD7899BR-1 operate from a single 5 V supply and provide a parallel digital output interface for connection to a microprocessor or DSP. The parallel interface on both parts supports high-speed data readback, making them suitable for real-time control and measurement systems.
What package type do the AD7892ARZ-1 and AD7899BR-1 use?
Both devices are offered in a 24-lead SOIC package. The "ARZ" and "BR" suffixes in the part numbers denote the package and grade options per Analog Devices nomenclature, but the underlying package family is the same 24-lead SOIC. Designers should verify the exact package drawing and thermal characteristics in the respective datasheets.
Can the AD7892ARZ-1 be used as a replacement for the AD7899BR-1 in an existing design?
No, not as a direct replacement. The two devices differ in resolution (12-bit vs 14-bit), sampling rate (500 kSPS vs 400 kSPS), pin functions, and internal architecture. Substitution would require PCB redesign, firmware adjustment for the different data format and timing, and full validation against the target system requirements.
Which device is better suited for high-resolution measurement applications?
The AD7899BR-1 is better suited for high-resolution measurement applications because it provides 14-bit resolution, offering four times the quantization levels of the 12-bit AD7892ARZ-1. For applications where throughput is the priority, the AD7892ARZ-1 offers a higher 500 kSPS sampling rate. The choice depends on the trade-off between resolution and speed required by the system.