Part A
AD7893BR-10
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2691 個数
- 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 AD7893BR-10 are not drop-in replacements for one another. Although both are Analog Devices 12-bit successive-approximation ADCs in a 24-lead SOIC package, they differ in input channel configuration, conversion throughput, external reference requirements, and power consumption. The AD7892BRZ-1 integrates a single-channel input with an on-chip reference and a faster conversion rate, while the AD7893BR-10 provides a single-channel input requiring an external reference with a slower maximum throughput. Designers must validate the interface, timing, and reference architecture before considering any substitution.
Different channel configuration
Different throughput
Different reference architecture
Different power profile
Parts at a glance
Part B
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)
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 | AD7893BR-10 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit ADCs, so digital resolution and LSB size are equivalent for a given input range. |
| Number of ADC Inputs / Channels | 2 (single-ended, with fast channel switching) | 1 (single-ended) | The AD7892 offers two input channels, allowing two signals to be digitized without an external multiplexer, whereas the AD7893 is single-channel. |
| Input Voltage Range | ±10 V (bipolar) | 0 V to +2.5 V (unipolar) | Different input spans require different signal conditioning; a ±10 V bipolar front end cannot be directly substituted with a 0–2.5 V unipolar device. |
| Maximum Throughput / Sampling Rate | 500 kSPS | 117 kSPS | The AD7892 samples roughly four times faster, which matters for capturing higher-frequency or fast-changing signals. |
| Interface Type | Parallel (12-bit word) | Serial (SPI/QSPI compatible) | Parallel versus serial output dictates the host microcontroller/FPGA pin count and firmware; these are not pin- or protocol-compatible. |
| Supply Voltage | +5 V single supply | +5 V single supply | Both operate from a single +5 V rail, so power-supply design is compatible between the two parts. |
| Package | 24-lead SOIC (wide body) | 8-lead SOIC | Different package footprints and pin counts mean the parts are not drop-in replacements on an existing PCB. |
| Internal Reference | Yes (on-chip reference) | Yes (on-chip reference) | Both include an internal reference, simplifying design and reducing external component count. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7893BR-10 | AD7892BRZ-1 |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD7893 | - |
| Number of Bits | 12 | 12 |
| Sampling Rate (Per Second) | 117k | - |
| Number of Inputs | 1 | 2 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI, Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A / D Converters | 1 | - |
| Architecture | SAR | SAR |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Sampling Rate(Per Second) | - | 500k |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the primary differences between the AD7892BRZ-1 and the AD7893BR-10?
The AD7892BRZ-1 is a 12-bit, 500 kSPS successive-approximation ADC with a parallel interface, while the AD7893BR-10 is a 12-bit, 117 kSPS ADC with a serial (SPI-compatible) interface. The AD7892BRZ-1 offers a faster throughput rate and parallel data output, whereas the AD7893BR-10 provides a slower, serial-oriented solution in a smaller package.
Are the AD7892BRZ-1 and AD7893BR-10 pin-compatible?
No. The AD7892BRZ-1 is supplied in a 24-lead SOIC (RW-24) package, while the AD7893BR-10 is supplied in an 8-lead SOIC (R-8) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for one another.
What are the analog input voltage ranges for each device?
The AD7892BRZ-1 provides a bipolar analog input range of ±10 V (with the -1 grade). The AD7893BR-10 provides a bipolar input range of ±10 V as well, as indicated by the "-10" grade suffix. Both devices therefore accept ±10 V full-scale inputs, but their input architectures and reference configurations should be verified against the respective datasheets.
How do the throughput rates of the AD7892BRZ-1 and AD7893BR-10 compare?
The AD7892BRZ-1 offers a maximum throughput of 500 kSPS, while the AD7893BR-10 offers a maximum throughput of 117 kSPS. The AD7892BRZ-1 is therefore approximately four times faster and is better suited to higher-speed acquisition applications.
What interface types do these two ADCs use?
The AD7892BRZ-1 uses a parallel microprocessor-compatible interface for data output. The AD7893BR-10 uses a serial interface compatible with SPI and QSPI protocols. This difference affects the host controller pin count and the firmware/software driver design.
Do both parts operate from the same supply voltage?
Both the AD7892BRZ-1 and the AD7893BR-10 operate from a single +5 V supply. Designers should still confirm the exact supply tolerance and current consumption specifications in the respective manufacturer datasheets, as these parameters can differ between the two devices.
Can the AD7893BR-10 be used as a direct replacement for the AD7892BRZ-1 in an existing design?
No, not as a direct drop-in replacement. The two devices differ in package (24-lead SOIC vs 8-lead SOIC), interface type (parallel vs serial), and throughput rate (500 kSPS vs 117 kSPS). A redesign of the PCB layout and interface firmware would be required, and the system's sampling-rate requirements must be re-evaluated.
Which device is more suitable for space-constrained or low-pin-count designs?
The AD7893BR-10 is more suitable for space-constrained designs because it is offered in an 8-lead SOIC package and uses a serial interface, which reduces both board area and host pin count. The AD7892BRZ-1's 24-lead package and parallel interface require more PCB space and more host I/O pins.