AD7893ARZ-2REEL - 12-Bit 117 kSPS Serial ADC | Analog Devices
MPN： AD7893ARZ-2REEL ✓ 啟用中AD7893ARZ-2REEL 概覽
A successive-approximation ADC is a type of analog-to-digital converter that performs a binary search against the input voltage using an internal DAC and comparator. Within the broader taxonomy, the AD7893 belongs to the successive-approximation register (SAR) ADC family, which sits inside the precision / data-converter class of mixed-signal integrated circuits and ultimately falls under data-converter ICs / signal-chain semiconductors. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy, making them the preferred architecture for multiplexed precision measurement.
The AD7893 is fabricated on Analog Devices' Linear Compatible CMOS (LC2MOS) process, a mixed-technology flow that combines precision bipolar input structures with low-power CMOS logic. The device specifies harmonic distortion and signal-to-noise ratio in addition to traditional DC accuracy parameters such as integral linearity error, full-scale error and offset error. A 6 microsecond conversion time and serial interface simplify galvanic isolation in industrial systems, while the +/-10 V true-bipolar input removes the need for external signal-conditioning scaling networks.
Typical applications include industrial process-control analog front ends, motor-control current/voltage sensing, portable instrumentation, multi-channel data-acquisition boards, and power-supply monitoring where a single +5 V rail and serial output reduce opto-isolator channel count. Compared with parallel-output ADCs of equivalent speed, the AD7893's serial interface dramatically reduces the digital I/O count on the host microcontroller or DSP, which is particularly valuable in space-constrained isolated designs. This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides.
直接替換替代品，適用於 AD7893ARZ-2REEL — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD7893ARZ-2REEL （相同外形與佔位） — 差異在於 Supply Voltage, Resolution, Architecture, Conversion Time, Operating Temperature Range.
AD7893ARZ-10REEL
✅ 直接替換聯絡詢價
查看資料表 →AD7893BRZ-2REEL
✅ 直接替換📋 參考替代品（不在目錄中）
AD7893ARZ-5REEL7
✅ 直接替換📋 參考替代品（不在目錄中）
AD7893AR-10REEL
✅ 直接替換聯絡詢價
查看資料表 →AD7863ARZ-2REEL
✅ 直接替換聯絡詢價
查看資料表 →AD7893ARZ-2REEL 最大額定值與電氣特性
| 解析度 | 12 bits |
| 拓撲 | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Sample Rate | 117 kSPS |
| Conversion Time | 6 microseconds |
| 輸入電壓範圍 | +/-10 V (bipolar, model -2) |
| 供應電壓 | +5 V single supply (4.75 V to 5.25 V) |
| 介面 | High-speed serial |
| On-chip Features | Track-and-hold amplifier, on-chip clock |
| Process Technology | LC2MOS (Linear Compatible CMOS) |
| 封裝 | 8-pin SOIC (R-8 / SOIC_N) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial) |
| RoHS 狀態 | Compliant |
| Lead Free | Yes |
| Packaging | Tape & Reel (REEL) |
AD7893ARZ-2REEL 腳位配置
| 腳位 1 | VDD — +5 V positive supply |
| 腳位 2 | GND — Ground |
| 腳位 3 | VIN — Analog input (+/-10 V bipolar for -2 variant) |
| 腳位 4 | REF — Reference voltage input/output |
| 腳位 5 | SCLK — Serial clock input |
| 腳位 6 | SDATA — Serial data output |
| 腳位 7 | CONVST — Conversion start input |
| 腳位 8 | BUSY — Conversion busy output |
典型應用
AD7893ARZ-2REEL 適用於 6 應用s: Industrial Process Control Analog Front End, Motor Control Current and Voltage Sensing, Portable Instrumentation and Data Acquisition, Multi-Channel Data Acquisition Boards, Power Supply Monitoring and Telemetry, Isolated Sensor Interface Modules.
Industrial Process Control Analog Front End
The AD7893ARZ-2REEL's +/-10 V true-bipolar input range and 12-bit resolution at 117 kSPS make it well suited to digitizing 4-20 mA loop signals, +/-10 V transducer outputs, and industrial sensor front ends directly, eliminating external signal-conditioning scaling networks. The single +5 V supply simplifies power-rail design in 24 V industrial backplanes with local regulation. Its high-speed serial interface reduces digital I/O count, allowing galvanic isolation through a single digital isolator channel rather than a parallel bus. The on-chip track-and-hold ensures accurate acquisition of fast-changing process variables, and the LC2MOS process provides the noise immunity needed in electrically noisy factory environments.
推薦
Motor Control Current and Voltage Sensing
The AD7893ARZ-2REEL digitizes shunt-resistor-derived motor current and DC-bus voltage signals with its +/-10 V input and 6 microsecond conversion time, enabling fast feedback loops in BLDC, PMSM and DC motor drives. The 117 kSPS throughput supports PWM frequencies above 20 kHz while the bipolar input directly handles bi-directional current flow without additional op-amp level shifting. The serial interface reduces optocoupler channel count, an advantage in high-voltage drive isolation barriers. Combined with the 8-pin SOIC footprint, the part fits compact inverter control PCBs where board area is at a premium.
推薦
Portable Instrumentation and Data Acquisition
Battery-powered test and measurement instruments benefit from the AD7893ARZ-2REEL's single +5 V supply and low-power serial interface, which minimize quiescent draw compared to parallel-output ADCs of equivalent speed. The +/-10 V input range covers the full output swing of most instrumentation amplifiers and sensor bridges without attenuation, preserving signal-to-noise ratio in the measurement chain. The 12-bit resolution is adequate for general-purpose logging, while the 117 kSPS throughput supports bandwidths of tens of kHz for vibration, strain and acoustic measurements. The 8-pin SOIC package keeps the analog front end small enough for handheld form factors.
推薦
Multi-Channel Data Acquisition Boards
Multi-channel DAQ boards use the AD7893ARZ-2REEL in parallel with analog multiplexers to sequentially digitize many sensors, with the 117 kSPS throughput multiplied across channels via time-domain multiplexing. The serial interface simplifies board layout because clock and data lines require only two traces rather than 12 parallel data lines, freeing GPIO on the host microcontroller for other tasks. The +/-10 V bipolar input handles both polarities of thermocouple-amplified or strain-gauge signals directly. The 8-pin SOIC package allows dense board layouts when several ADCs are stacked for simultaneous-sampling architectures.
推薦
Power Supply Monitoring and Telemetry
The AD7893ARZ-2REEL monitors intermediate bus voltages and battery-pack telemetry in distributed power architectures with its +/-10 V input range, which directly accepts the output of resistive dividers from +/-12 V or +/-15 V rails without scaling amplifiers. The single +5 V supply is compatible with the same rail that powers the housekeeping microcontroller, simplifying the auxiliary supply tree. The 117 kSPS throughput is more than sufficient for tracking slow voltage and current drift in battery-management systems, and the 12-bit resolution yields LSB steps that are small relative to typical telemetry thresholds. The serial interface is straightforward to route through I2C-style isolators for high-voltage monitoring.
推薦
Isolated Sensor Interface Modules
Isolated sensor modules pair the AD7893ARZ-2REEL with digital isolators because the high-speed serial interface needs only two signal lines (clock and data), dramatically reducing the size and cost of the isolation barrier compared to parallel-output converters. The +/-10 V bipolar input accommodates the output of bridge amplifiers, load cells and current transducers directly. The 117 kSPS sample rate supports closed-loop control rates while the deterministic latency of SAR conversion aids in system timing analysis. The 8-pin SOIC footprint fits compact isolated PCB designs where creepage and clearance distances must be preserved.
推薦
推薦產品摘要
工程參考資料，適用於 AD7893ARZ-2REEL — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD7893ARZ-10REEL | AD7893BRZ-2REEL | AD7893ARZ-5REEL7 | AD7893AR-10REEL | AD7863ARZ-2REEL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-pin SOIC (R-8) | 8-pin SOIC (R-8) - same | 8-pin SOIC (R-8) - same | 8-pin SOIC (R-8) - same | 8-pin SOIC (R-8) - same | 8-pin SOIC (R-8) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 2 |
| Interface | Serial | Serial | Serial | Serial | Serial | Serial |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
主要差異化特點
- True +/-10 V bipolar input without signal conditioning (對比AD7893ARZ-5REEL7)
- Higher-grade linearity option in same footprint (對比AD7893BRZ-2REEL)
- Single-channel simplicity vs multi-channel integration (對比AD7863ARZ-2REEL)
設計說明
Place the decoupling capacitor (1uF ceramic in parallel with 10uF tantalum or low-ESR electrolytic) within 5 mm of the VDD pin to suppress switching transients from the LC2MOS logic. The analog input (VIN) trace should be guarded with a ground plane on both sides and routed away from the serial interface clock lines to avoid digital-to-analog coupling. The reference pin (REF) requires a low-impedance bypass capacitor; verify the bypass network against the datasheet reference-circuit figure.
The high-speed serial interface edges are fast; use a series-termination resistor near the SCLK driver and keep the SDATA trace length matched to the clock trace within a few millimeters. When interfacing to a microcontroller, level-shifters are typically not required because the AD7893 serial logic is +5 V CMOS-compatible with most modern MCU GPIO when VDD is shared at +5 V. If the host runs at 3.3 V logic, use a resistive divider or level translator on the SDATA output only.
Do not connect the bipolar input pin to voltages outside the absolute maximum range specified in the datasheet; the +/-10 V nominal input still requires headroom for transients and fault conditions. Do not rely on the internal reference unless the application can tolerate its specified tolerance and drift; for precision measurements, use an external low-noise reference. Ensure the CONVST pulse width respects the datasheet timing minimum to avoid incomplete acquisitions, particularly at maximum throughput.
合規資訊
RoHS compliant per DigiKey product page (993713). Industrial temperature grade (-40C to +85C). Not AEC-Q100 qualified; the AD7893 is a general-purpose precision ADC, not an automotive-grade part.
