AD7892AR-1REEL - 12-Bit 500kSPS SAR ADC | Analog Devices
MPN: AD7892AR-1REEL ✗ Cuối đờiAD7892AR-1REEL Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho AD7892AR-1REEL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD7892AR-1REEL (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Supply Voltage, Interface, Number of Channels.
AD7892ARZ-1REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7892AR-1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7892ARZ-1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7892AR-1REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7265BCPZ-REEL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7264BSTZ-5-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7324BRUZ-REEL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7892AR-1REEL Tỷ lệ tối đa & tính chất điện
| Number of Bits | 12 |
| Tỷ lệ lấy mẫu | 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) |
| Điện áp cung cấp | +5 V single supply |
| Internal Reference | +2.5 V (on-chip) |
| On-Chip Track/Hold | Yes |
| Hộp | 24-pin SOIC wide body (0.295 inch / 7.50 mm width), Tape & Reel |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân AD7892AR-1REEL
| Chân 1 | VSS/AGND — Analog ground |
| Chân 2 | DGND — Digital ground |
| Chân 3 | VDD — +5 V supply |
| Chân 4 | VDRIVE — Logic supply for digital interface |
| Chân 5 | CAP — Reference bypass capacitor pin |
| Chân 6 | REFIN/REFOUT — Reference input / 2.5 V reference output |
| Chân 7 | AIN/HI — Analog input high |
| Chân 8 | RANGE — Input range select (5V or 10V full scale) |
| Chân 9 | CONVST — Conversion start input |
| Chân 10 | BUSY — Conversion in progress output |
| Chân 11 | EOC — End of conversion indicator |
| Chân 12 | SCLK — Serial interface clock |
| Chân 13 | DOUT — Serial data output |
| Chân 14 | DIN — Serial data input (daisy-chain) |
| Chân 15 | DRDY — Data ready / frame sync |
| Chân 16 | CS — Chip select (active low) |
| Chân 17 | WR — Parallel write control |
| Chân 18 | RD — Parallel read control |
| Chân 19 | MODE — Serial/parallel mode select |
| Chân 20 | DB0 — Parallel data bit 0 (LSB) |
| Chân 21 | DB1 — Parallel data bit 1 |
| Chân 22 | DB2 — Parallel data bit 2 |
| Chân 23 | DB3 — Parallel data bit 3 |
| Chân 24 | DGND — Digital ground (exposed pad optional) |
Ứng dụng tiêu biểu
AD7892AR-1REEL phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7892AR-1REEL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Same die with RoHS-compliant finish (vsAD7892AR-1REEL (this part))
- Higher throughput in modern LFCSP (vsAD7265BCPZ-REEL)
- 14-bit resolution upgrade in same family (vsAD7264BSTZ-5-RL7)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
