AD7892AR-1REEL - 12-Bit 500kSPS SAR ADC | Analog Devices
部品番号: AD7892AR-1REEL ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $14.05 | $1,405.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $11.1 | $11,100.00 |
AD7892AR-1REEL 概要
An ADC (analog-to-digital converter) is a mixed-signal semiconductor that translates real-world analog voltages into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the data-converter hierarchy, SAR (successive-approximation register) ADCs sit between flash converters and sigma-delta ADCs in speed and resolution: they offer 8-18 bits of resolution with 0.1-10 MSPS throughput and low latency, making them the workhorse for multiplexed control loops, instrumentation, and motor control. The AD7892 family belongs to this SAR category and is further classified as a bipolar-input, single-supply precision ADC for industrial measurement applications.
Key specifications include 12-bit resolution (no missing codes), 500 kSPS throughput (the AD7892-1 grade; the AD7892-3 grade reaches 600 kSPS), bipolar ±5 V or ±10 V analog input range, ±5 V single-supply operation, internal 2.5 V reference, and 1.47 µs ADC conversion time. The 24-pin SOIC wide-body package offers 0.295 inch (7.50 mm) body width and operates from -40 °C to +85 °C ambient, suitable for industrial environments.
Architecturally, the converter combines a high-speed comparator, charge-redistribution DAC array, and successive-approximation register clocked from an internal oscillator. The on-chip track/hold front-end settles in ~150 ns, allowing full throughput at the rated 500 kSPS without external buffering for many sensor signals.
Typical applications include industrial process control, motor control feedback loops, multi-channel data acquisition systems, instrumentation front-ends, and precision transducer signal conditioning. Design engineers select the AD7892-1 when bipolar input range and single-supply operation are required in a compact analog front-end.
ドロップイン代替品: AD7892AR-1REEL — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AD7892AR-1REEL （同一形状・フットプリント） — 相違点: Package, Operating Temperature, Supply Voltage, Interface, Number of Channels.
クイック比較ツール — 並列比較する代替部品を選択:
AD7892ARZ-1REEL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7892AR-1
✅ ドロップイン✓ 在庫あり
$11.2 / 個
データシートを見る →AD7892ARZ-1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7892AR-1REEL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD7265BCPZ-REEL
✅ ドロップイン✓ 在庫あり
$8.15 / 個
データシートを見る →AD7264BSTZ-5-RL7
✅ ドロップイン✓ 在庫あり
$10.95 / 個
データシートを見る →AD7324BRUZ-REEL
✅ ドロップイン✓ 在庫あり
$5.75 / 個
データシートを見る →AD7892AR-1REEL 最大定格＆電気的特性
| Number of Bits | 12 |
| サンプリングレート | 500 kSPS (AD7892-1, AD7892-2); 600 kSPS (AD7892-3) |
| Conversion Time | 1.47 µs |
| Number of Inputs | 1 (single channel, with ±5V or ±10V bipolar input range) |
| Data Interface | Serial and Parallel |
| Architecture | SAR (Successive Approximation) |
| Analog Input Type | Bipolar |
| Analog Input Range | ±5 V or ±10 V (input scale select pin) |
| 電源電圧 | +5 V single supply |
| Internal Reference | +2.5 V (on-chip) |
| On-Chip Track/Hold | Yes |
| パッケージ | 24-pin SOIC wide body (0.295 inch / 7.50 mm width), Tape & Reel |
| 動作温度 | -40 °C to +85 °C |
| 実装タイプ | Surface Mount |
AD7892AR-1REEL ピン構成
| ピン 1 | VSS/AGND — Analog ground |
| ピン 2 | DGND — Digital ground |
| ピン 3 | VDD — +5 V supply |
| ピン 4 | VDRIVE — Logic supply for digital interface |
| ピン 5 | CAP — Reference bypass capacitor pin |
| ピン 6 | REFIN/REFOUT — Reference input / 2.5 V reference output |
| ピン 7 | AIN/HI — Analog input high |
| ピン 8 | RANGE — Input range select (5V or 10V full scale) |
| ピン 9 | CONVST — Conversion start input |
| ピン 10 | BUSY — Conversion in progress output |
| ピン 11 | EOC — End of conversion indicator |
| ピン 12 | SCLK — Serial interface clock |
| ピン 13 | DOUT — Serial data output |
| ピン 14 | DIN — Serial data input (daisy-chain) |
| ピン 15 | DRDY — Data ready / frame sync |
| ピン 16 | CS — Chip select (active low) |
| ピン 17 | WR — Parallel write control |
| ピン 18 | RD — Parallel read control |
| ピン 19 | MODE — Serial/parallel mode select |
| ピン 20 | DB0 — Parallel data bit 0 (LSB) |
| ピン 21 | DB1 — Parallel data bit 1 |
| ピン 22 | DB2 — Parallel data bit 2 |
| ピン 23 | DB3 — Parallel data bit 3 |
| ピン 24 | DGND — Digital ground (exposed pad optional) |
主な用途
AD7892AR-1REEL の用途: 7 件s: Industrial Process Control, Motor Control Current Sensing, Multi-Channel Data Acquisition Systems, Instrumentation and Precision Transducer Digitizing, Power-Line Monitoring and Energy Meters, Medical Patient-Monitoring Front-Ends, Audio and Acoustic Test Equipment.
Industrial Process Control
The AD7892AR-1REEL's bipolar ±5 V or ±10 V input range paired with a single +5 V supply makes it ideal for digitizing 4-20 mA transmitter loop outputs, thermocouple-amplifier signals, and pressure/load-cell front-ends. Its 1.47 µs conversion time and 500 kSPS throughput let a single part multiplex four sensors at >100 kSPS each, while the on-chip 2.5 V reference removes external reference drift.
おすすめ
Motor Control Current Sensing
In BLDC and servo drives, the AD7892AR-1REEL samples shunt-resistor voltage drops across the three phases with sub-2 µs latency thanks to its 1.47 µs conversion time. The bipolar input directly accommodates bi-directional phase currents without external op-amp inversion, and 500 kSPS throughput supports PWM frequencies up to 50 kHz with synchronous sampling. The 24-pin SOIC package fits well within low-side shunt amplifier layouts.
おすすめ
Multi-Channel Data Acquisition Systems
Using the AD7892AR-1REEL with an external analog multiplexer, designers can build 8- or 16-channel data acquisition front-ends that aggregate up to 500 kSPS aggregate sample rate. The internal track/hold eliminates front-end buffer amps for settling times of <150 ns, and the serial-output mode reduces PCB routing density in slot-card PXI/cPCI designs. The wide-body SOIC handles the thermal load in densely populated chassis.
おすすめ
Instrumentation and Precision Transducer Digitizing
The AD7892AR-1REEL is well matched to precision load cells, strain gauges, and LVDT front-ends that produce bipolar millivolt-level outputs. Its 12-bit no-missing-codes linearity, integrated track/hold, and ±10 V input range accept conditioned signals directly, while the choice of two's-complement, offset-binary or straight-binary output codes simplifies software-side scale-and-offset calibration on 32-bit microcontrollers.
おすすめ
Power-Line Monitoring and Energy Meters
Single-phase and polyphase energy meters use the AD7892AR-1REEL to digitize current-transformer and Rogowski-coil outputs simultaneously with the line voltage waveform. With 500 kSPS throughput the part captures all relevant harmonics up to the 50th (per IEC 61000-4-7 instrument classes), and the bipolar input handles both half-cycles without external bias circuitry. The fixed +5 V supply simplifies isolation-barrier design.
おすすめ
Medical Patient-Monitoring Front-Ends
ECG, EEG, and SpO2 front-ends benefit from the AD7892AR-1REEL's bipolar input range and 12-bit linear-no-missing-codes performance when sampling electrode signals at 250-500 kSPS aggregate. The internal 2.5 V reference stabilizes ratiometric measurements, and the 24-pin SOIC package footprint is well documented for medical IEC 60601-1 dielectric clearance layouts in low-power bedside monitors.
おすすめ
Audio and Acoustic Test Equipment
Test and measurement equipment digitizing acoustic signals from microphones, hydrophones, and accelerometers uses the AD7892AR-1REEL for its low-noise SAR conversion at 500 kSPS, supporting wideband acoustic analysis up to 200 kHz audio bandwidth. Serial output mode keeps the PCB within tight chassis layouts. For highest-performance audio, ADI recommends the dual-channel AD7266 family.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD7892AR-1REEL — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | AD7892ARZ-1REEL | AD7892AR-1 | AD7265BCPZ-REEL | AD7264BSTZ-5-RL7 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-SOIC wide body (T&R) | 24-SOIC wide body (T&R) | 24-SOIC wide body (tube) | 32-LFCSP (T&R) — footprint change | 24-LFCSP (T&R) |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 14-bit (upgrade) |
| Throughput (kSPS) | 500 | 500 | 500 | 1000 | 1000 |
| Input Range | ±5 V or ±10 V bipolar | ±5 V or ±10 V bipolar | ±5 V or ±10 V bipolar | 0-VREF true-differential bipolar | Differential bipolar (VREF/VSS) |
| Interface | Serial + Parallel | Serial + Parallel | Serial + Parallel | Serial-only | Serial-only |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| RoHS Status | non-RoHS (SnPb) | RoHS-compliant (matte-tin) | non-RoHS (SnPb) | RoHS-compliant | RoHS-compliant |
主な差別化要因
- Same die with RoHS-compliant finish （vs AD7892AR-1REEL (this part))
- Higher throughput in modern LFCSP （vs AD7265BCPZ-REEL)
- 14-bit resolution upgrade in same family （vs AD7264BSTZ-5-RL7)
設計ノート
Power the AD7892AR-1REEL from a clean +5 V analog rail; place a 10 µF tantalum + 0.1 µF ceramic pair directly at the VDD pin and repeat decoupling at the VDRIVE pin (when used). The on-chip 2.5 V reference output needs its CAP pin loaded with a 1 µF ceramic for stability. For best dynamic performance, place a ferrite bead between the analog and digital +5 V rails.
Route the analog input traces (AIN/HI, RANGE) as a guarded differential pair, kept away from the parallel data bus to reduce digital kickback. The DB0-DB11 lines should be impedance-controlled when traces exceed 50 mm. Tie unused digital inputs (CS, WR, RD) to a defined logic level - never leave them floating, or the converter's interface state becomes unpredictable at startup.
Do not exceed VDD + 0.3 V on any digital input or sink more than 50 mA through the VDD pin during hot-plug events. Mis-setting the RANGE pin to ±5 V (instead of ±10 V) while expecting bipolar 10 V swings clips the input at full scale and corrupts readings. When cascading two ADCs through DIN/DOUT, observe the daisy-chain timing diagram in the datasheet exactly, since tDSDT and tDCSH are asymmetric.
コンプライアンス情報
The 'AR' suffix indicates the legacy SnPb (lead-bearing) finish and is NOT RoHS compliant. For RoHS-compliant production, choose the 'ARZ' suffix variant. This part is not AEC-Q100 qualified - not intended for automotive underhood applications.
