AD7892BR-1REEL - 12-Bit 500kSPS Bipolar SAR ADC | Analog Devices
부품 번호: AD7892BR-1REEL ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $22.5 | $22.50 |
| 10 | $20.25 | $202.50 |
| 100 | $18.1 | $1,810.00 |
| 500 | $16.05 | $8,025.00 |
| 1,000 | $14.2 | $14,200.00 |
AD7892BR-1REEL 개요
A SAR (successive-approximation register) ADC is a class of Nyquist-rate converter that uses a binary-search algorithm against an internal DAC to determine each bit of the output, one decision per clock cycle. SAR ADCs sit in the data-converter hierarchy between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, lower bandwidth). The AD7892 belongs to the integrated data-acquisition IC family, which combines the converter, reference, and interface logic on a single CMOS die, simplifying the BOM for industrial and instrumentation designs.
Key specifications include 12-bit resolution, 500 kSPS sampling rate (AD7892-1/AD7892-2 grade), 1.47 µs conversion time, single +5 V supply operation, ±10 V bipolar analog input range, internal +2.5 V reference, and low power dissipation of approximately 60 mW. The serial interface operates up to the full conversion rate and can be configured for word-mode operation, while the parallel interface provides fast bus access times suitable for direct connection to standard microprocessors.
Typical applications include industrial process control, instrumentation, signal monitoring, motor control current/voltage sensing, and data acquisition front-ends requiring a bipolar-input ADC. The bipolar input range eliminates the need for external signal-conditioning amplifiers in many ±5 V or ±10 V instrumentation environments, reducing both BOM cost and board area. When designing with the AD7892BR-1REEL, allow sufficient settling time at the analog input pins and place the power-supply decoupling capacitors as close to the AVDD and DVDD pins as possible to achieve the rated linearity performance.
드롭인 대체품: AD7892BR-1REEL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7892BR-1REEL (동일 폼 팩터 및 풋프린트) — 차이점: RoHS Status, Architecture, Conversion Time, Data Interface, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7892BRZ-1REEL
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7892BR-1
✅ 드롭인✓ 재고 있음
$38.9 / 개
데이터시트 보기 →AD7892ARZ-1REEL
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7892AR-1
✅ 드롭인✓ 재고 있음
$11.2 / 개
데이터시트 보기 →AD7892BR-1REEL 최대 정격 & 전기적 특성
| 분해능 | 12 bits |
| Sampling Rate (AD7892-1) | 500 kSPS |
| Sampling Rate (AD7892-3) | 600 kSPS |
| Conversion Time | 1.47 µs |
| Architecture | Successive Approximation (SAR) |
| Number of Input Channels | 2 |
| Input Voltage Range (AD7892-1) | ±10 V bipolar |
| 공급 전압 | +5 V single supply |
| Internal Reference | +2.5 V |
| Data Interface | Serial and Parallel |
| Power Dissipation | 60 mW typical |
| Integral Nonlinearity (INL) | ±1 LSB |
| 패키지 / 케이스 | 24-SOIC (0.295 in, 7.50 mm width) |
| Packaging | Tape & Reel (TR) |
| 동작 온도 범위 | -40C to +85C (industrial) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AD7892BR-1REEL 핀 구성
| 핀 1 | DB0 — Parallel Data Bit 0 (LSB) |
| 핀 2 | DB1 — Parallel Data Bit 1 |
| 핀 3 | DB2 — Parallel Data Bit 2 |
| 핀 4 | DB3 — Parallel Data Bit 3 |
| 핀 5 | DB4 — Parallel Data Bit 4 |
| 핀 6 | DB5 — Parallel Data Bit 5 |
| 핀 7 | DB6 — Parallel Data Bit 6 |
| 핀 8 | DB7 — Parallel Data Bit 7 |
| 핀 9 | DB8 — Parallel Data Bit 8 |
| 핀 10 | DB9 — Parallel Data Bit 9 |
| 핀 11 | DB10 — Parallel Data Bit 10 |
| 핀 12 | DB11 — Parallel Data Bit 11 (MSB) |
| 핀 13 | MODE — Interface mode select (Serial / Parallel) |
| 핀 14 | DGND — Digital Ground |
| 핀 15 | DVDD — Digital Supply (+5 V) |
| 핀 16 | SCLK — Serial Clock (serial interface mode) |
| 핀 17 | SDATA — Serial Data Output |
| 핀 18 | CONVST — Conversion Start Input |
| 핀 19 | EOC — End of Conversion Output |
| 핀 20 | AVDD — Analog Supply (+5 V) |
| 핀 21 | AGND — Analog Ground |
| 핀 22 | REF — Internal +2.5 V Reference |
| 핀 23 | AIN — Analog Input (±10 V bipolar, -1 grade) |
| 핀 24 | N/C — Not Connected - analog input variant select |
일반적인 애플리케이션
AD7892BR-1REEL 적합 용도: 6 애플리케이션s: Industrial Process Control, Data Acquisition Systems, Motor Control and Drive Feedback, Instrumentation and Test Equipment, Signal Monitoring and Protection, Medical and Diagnostic Equipment.
Industrial Process Control
The AD7892BR-1REEL fits industrial process-control front-ends because its ±10 V bipolar input range directly accepts transducer signals from industrial 4-20 mA loop converters and voltage-output sensors without external signal conditioning. The 500 kSPS sample rate and 1.47 µs conversion time provide high-resolution digitization of fast-changing process variables, while the on-chip +2.5 V reference removes one BOM line. Placed between the transducer conditioning block and the host MCU/DSP, it captures ±10 V signals at full scale; engineers should place 0.1 µF decoupling on AVDD/DVDD close to the IC to achieve the rated INL performance.
추천
Data Acquisition Systems
Data-acquisition systems benefit from the AD7892BR-1REEL because it offers both serial and parallel interfaces selectable via the MODE pin, allowing the same board design to attach to either a parallel-bus MCU/DSP or a serial-port microcontroller with no rework. The 500 kSPS sampling rate supports wide-bandwidth signal capture at 12-bit resolution. Place it on the analog front-end card between input multiplexers and the host processor; the internal reference reduces analog rail complexity. The 24-SOIC footprint is compatible with automated pick-and-place lines for volume production of DAQ modules and PC-based measurement cards.
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Motor Control and Drive Feedback
The AD7892BR-1REEL suits motor control and drive feedback loops where the controller needs fast, accurate current/voltage telemetry. Its ±10 V bipolar input range captures current-sense amplifier outputs operating around a 0 V center point, and its 500 kSPS sample rate supports high-speed FOC (field-oriented control) control loops with sub-microsecond conversion times. Place it downstream of current-sense amplifiers (e.g., AD8210) and on the same board as the motor controller MCU; the +5 V single-supply operation simplifies the power tree compared to ADCs needing ±15 V rails. Designers should size the input anti-aliasing filter below the Nyquist rate of 250 kHz for the -1 input variant.
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Instrumentation and Test Equipment
Bench and rack instrumentation needs precise, repeatable, fast conversions of bipolar analog inputs - exactly what the AD7892BR-1REEL offers with 12-bit resolution and ±10 V input range. The ±1 LSB INL B-grade linearity is suitable for general-purpose multimeters, scope meter plug-in cards, and bench DMM front-ends. Placed between input attenuation/scaling circuits and the display FPGA/CPU, it provides the measurement resolution required for industrial test gear. The dual serial/parallel interface option lets designers reuse the same PCB for both high-speed displays (parallel) and microcontroller-based handhelds (serial).
추천
Signal Monitoring and Protection
Power-line signal monitoring and equipment protection relays use the AD7892BR-1REEL to digitize voltage and current waveforms with good fidelity. Its 500 kSPS sample rate captures harmonics up to ~250 kHz (Nyquist), sufficient for many power-quality monitoring tasks, while the ±10 V input range handles sense-transformer-scaled voltages directly. The single +5 V supply operation enables designs spanning directly from the analog conditioning op-amp supply rail. Place the converter downstream of CT/PT sense transformers and ahead of the microcontroller computing RMS, true-power, and harmonic analysis.
추천
Medical and Diagnostic Equipment
Patient-monitoring and laboratory diagnostic instruments such as blood analyzers, infusion pumps, and bench-top measurement systems benefit from the AD7892BR-1REEL's combination of 12-bit resolution, ±10 V bipolar input, and 500 kSPS throughput. The bipolar input simplifies interface to legacy ±10 V analog signal chains common in medical electronics, while the integrated reference simplifies the analog supply tree. Place it between sensor signal-conditioning stages and the medical-grade processor; engineers should follow IEC 60601 isolation and EMI guidelines for the surrounding PCB layout, and route analog and digital grounds with careful impedance control.
추천
추천 제품 요약
엔지니어링 참조 데이터: AD7892BR-1REEL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7892BRZ-1REEL | AD7892BR-1 | AD7892ARZ-1REEL | AD7892AR-1 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-SOIC | 24-SOIC | 24-SOIC | 24-SOIC | 24-SOIC |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS |
| Input Voltage Range | ±10 V bipolar | ±10 V bipolar | ±10 V bipolar | ±10 V bipolar | ±10 V bipolar |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V | +5 V |
| Internal Reference | +2.5 V | +2.5 V | +2.5 V | +2.5 V | +2.5 V |
| INL (Grade) | ±1 LSB (B grade) | ±1 LSB (B grade) | ±1 LSB (B grade) | ±1.5 LSB (A grade) | ±1.5 LSB (A grade) |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tube |
주요 차별점
- Bipolar ±10 V input range without external signal conditioning (vs AD7892AR-1 (A-grade variant))
- Tape & reel packaging for high-volume production (vs AD7892BR-1 (tube variant))
- Dual serial/parallel interface in one IC (vs AD7858AR (parallel-only))
설계 노트
Place 0.1 µF ceramic decoupling capacitors as close as possible to both the AVDD (pin 20) and DVDD (pin 15) pins, with a short, low-inductance ground return to AGND (pin 21) and DGND (pin 14) respectively. According to the AD7892 datasheet, separate analog and digital ground planes should be tied together at a single point beneath the IC to avoid digital noise coupling into the analog converter path. Trace length from the decoupling caps to the supply pins should be less than 3 mm to suppress high-frequency noise on the +5 V rail.
Route the analog input (AIN, pin 23) and reference (REF, pin 22) traces away from noisy digital lines. Match trace impedances if the analog input source is not directly adjacent, and add an anti-aliasing RC filter (typically 100 Ω plus 1 nF) before AIN to limit input bandwidth to below the Nyquist rate (~250 kHz for the 500 kSPS -1 variant). For the ±10 V bipolar input variant, ensure the input signal does not exceed the absolute maximum rating to avoid permanent damage to the input protection diodes.
Do not apply an analog input signal before the AVDD supply has stabilized. According to the AD7892 datasheet, the CONVST pin must be held low until supplies and the internal reference have settled to avoid spurious conversions or latch-up. Engineers should also verify the MODE pin configuration matches the host interface: a MODE-selectable serial/parallel interface, if mis-configured, results in no conversion completion. Use the EOC pin to gate read operations to ensure data integrity, especially in interrupt-driven microcontroller designs.
규정 준수 정보
Standard AD7892 family. The B-grade industrial part is RoHS-compliant per the AD7892 datasheet marking - confirm lead-free RoHS status by selecting the -REEL suffix with Z flag (AD7892BRZ-1REEL) if required. No AEC-Q100 automotive qualification for this industrial-grade ADC.
