AD7892ARZ-2REEL - 12-Bit 500kSPS Single-Supply ADC | ADI
N.º da peça: AD7892ARZ-2REEL ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $13.85 | $1.385,00 |
| 500 | $11.4 | $5.700,00 |
| 1.000 | $9.95 | $9.950,00 |
AD7892ARZ-2REEL Visão geral
A successive-approximation register (SAR) ADC is a precision data converter that resolves an analog input to a digital code in N clock cycles using a binary-search algorithm. SAR ADCs are favored over delta-sigma and pipeline types when applications need deterministic latency, low latency per conversion, and excellent DC linearity at moderate-to-high sampling rates. Within the broader signal-chain hierarchy, the SAR ADC sits between general-purpose data converters and precision instrumentation; AD7892 specifically targets single-supply, low-power industrial and instrumentation systems where bipolar input ranges are required without a negative rail.
Key features include 500 kSPS throughput in the -2 grade, 1.47 µs conversion time, on-chip +2.5 V reference with low drift, input range pin-strapping for 0-VREF or ±10 V operation, and 60 mW typical power dissipation from a single +5 V supply. Fabricated in ADI's LC2MOS process that mixes precision bipolar input stages with low-power CMOS logic, the AD7892 achieves low power without sacrificing analog input accuracy. Interface options include high-speed parallel or two-wire serial output, allowing the same silicon to serve memory-mapped microcontroller buses or low-pin-count DSP serial ports.
Typical applications include industrial process control loops, portable battery-powered instrumentation, motor control current sensing, and DSP front-end data acquisition. The on-chip reference and single +5 V supply simplify system BOM and reduce PCB area, while the ±10 V input range option makes the part suitable for legacy ±12 V industrial signal paths when powered from a single +5 V rail via input attenuation. Designers should note that the -2 grade throughput is 500 kSPS versus the -3 grade's 600 kSPS, and the -1 grade offers single-ended rather than dual analog inputs.
For thermal management, the 24-pin SOIC plastic package combined with 60 mW typical dissipation requires only standard PCB thermal practice. The internal reference decouples design effort from external reference selection; bypass with the recommended capacitor network per the datasheet to minimize conversion noise. The reel-packaged -REEL suffix denotes 7-inch tape and reel for high-volume SMT assembly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Alternativas drop-in para AD7892ARZ-2REEL — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD7892ARZ-2REEL (mesmo formato e footprint) — diferindo em Data Interface, Power Dissipation (typical), Internal Reference, Number of ADCs, Number of Analog Inputs.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD7892ARZ-2
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD7892ARZ-1REEL
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD7892ARZ-5REEL
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD7862ARS-2REEL
✅ Drop-In✓ Em estoque
$14.85 / unidade
Ver ficha técnica →AD7863ARZ-2REEL
✅ Drop-In✓ Em estoque
$10.2 / unidade
Ver ficha técnica →AD7892ARZ-2REEL Classificações máximas e características elétricas
| Manufacturer | Analog Devices Inc. |
| MPN | AD7892ARZ-2REEL |
| Part Family | AD7892 |
| Speed Grade | -2 (500 kSPS) |
| Resolução | 12 bits |
| Conversion Architecture | SAR (Successive Approximation) |
| Taxa de amostragem | 500 kSPS |
| Conversion Time | 1.47 us |
| Number of Analog Inputs | 2 |
| Tensão de alimentação | +5 V single supply |
| Power Dissipation (typical) | 60 mW |
| Internal Reference | +2.5 V (on-chip) |
| Analog Input Range (AD7892-2) | 0 V to VREF or ±10 V (pin-strappable) |
| Linearity Error (max) | ±1 LSB |
| Data Interface | Parallel or Serial |
| Encapsulamento | 24-pin SOIC (wide-body, 0.295" / 7.50 mm) |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel (REEL suffix) |
| Status RoHS | Compliant |
| Process Technology | LC2MOS |
Configuração de pinos do AD7892ARZ-2REEL
| Pino 1 | VIN1 — Analog Input 1 |
| Pino 2 | VIN2 — Analog Input 2 / Range Select |
| Pino 3 | AGND — Analog Ground |
| Pino 4 | REF — +2.5 V Reference Output |
| Pino 5 | REF DEC — Reference Decoupling |
| Pino 6 | VDD — +5 V Supply |
| Pino 7 | DGND — Digital Ground |
| Pino 8 | CONVST — Conversion Start Input |
| Pino 9 | BUSY — Busy Output (active during conversion) |
| Pino 10 | EOC — End of Conversion |
| Pino 11 | CS — Chip Select Input |
| Pino 12 | RD — Read Input |
| Pino 13 | WR — Write Input |
| Pino 14 | MODE — Interface Mode Select |
| Pino 15 | DB11 — Data Bit 11 (MSB) |
| Pino 16 | DB10 — Data Bit 10 |
| Pino 17 | DB9 — Data Bit 9 |
| Pino 18 | DB8 — Data Bit 8 |
| Pino 19 | DB7 — Data Bit 7 |
| Pino 20 | DB6 — Data Bit 6 |
| Pino 21 | DB5 — Data Bit 5 |
| Pino 22 | DB4 — Data Bit 4 |
| Pino 23 | DB3/SCLK — Data Bit 3 / Serial Clock |
| Pino 24 | DB2/SDATA — Data Bit 2 / Serial Data |
Aplicações típicas
AD7892ARZ-2REEL é adequado para 6 aplicaçãos: Industrial Process Control Data Acquisition, Motor Control Current Sensing, Portable Battery-Powered Instrumentation, DSP Front-End Data Acquisition, Power Supply Monitoring and Telemetry, Medical Instrumentation Signal Acquisition.
Industrial Process Control Data Acquisition
The AD7892ARZ-2REEL fits industrial process control because its 500 kSPS sampling rate and 12-bit resolution deliver the speed and accuracy needed to digitize 4-20 mA loop signals, thermocouple amplifier outputs, and pressure transducer signals. The ±10 V input range option (AD7892-2 grade) directly accepts legacy industrial signal levels without external signal conditioning, while the single +5 V supply simplifies system power design. The on-chip +2.5 V reference eliminates the external reference BOM, reducing PCB area in DIN-rail-mounted controllers where space is constrained. Designers place the part between the analog signal conditioning stage and the microcontroller or DSP, using the parallel interface for fastest data transfer in multi-channel scanning systems.
Recomendado
Motor Control Current Sensing
The AD7892ARZ-2REEL suits motor control current sensing applications where the SAR architecture's deterministic 1.47 µs conversion latency enables precise sampling alignment to PWM edges. The 500 kSPS throughput captures current ripple at 20 kHz PWM frequencies with 25x oversampling for accurate RMS current measurement, while the 12-bit resolution provides 0.024% FS step size adequate for torque-ripple analysis. The pin-strappable ±10 V input range accepts Hall-effect sensor outputs or shunt-amplifier signals directly, reducing external signal chain components. Place the ADC between the current-sense amplifier and the DSP/MCU, sampling synchronously with the PWM carrier for field-oriented control (FOC) loops.
Recomendado
Portable Battery-Powered Instrumentation
The AD7892ARZ-2REEL serves portable battery-powered instrumentation because its 60 mW typical power dissipation from a single +5 V supply minimizes battery drain in handheld measurement equipment. The on-chip track-and-hold amplifier eliminates external T/H circuitry, shrinking the analog front-end to a single IC plus input protection, and the 12-bit resolution with ±1 LSB linearity error provides adequate accuracy for field measurement instruments. The 24-pin SOIC wide-body package is assembly-friendly for low-volume instrumentation production. Use the part with low-duty-cycle triggering to put the system in standby between conversions, extending battery life in digital multimeters and portable data loggers.
Recomendado
DSP Front-End Data Acquisition
The AD7892ARZ-2REEL functions as a DSP front-end ADC for audio-bandwidth signal processing applications such as spectrum analyzers, audio test equipment, and vibration monitoring systems. The 500 kSPS sampling rate comfortably exceeds the Nyquist requirement for 200 kHz signal bandwidth, and the 12-bit resolution is sufficient for 70+ dB dynamic range analysis. The configurable parallel or two-wire serial interface directly connects to TI C6000 DSPs, ADI SHARC processors, or modern ARM Cortex-M microcontrollers. Place the ADC upstream of the DSP with a small anti-alias filter, using the internal +2.5 V reference to maintain gain accuracy without external precision components.
Recomendado
Power Supply Monitoring and Telemetry
The AD7892ARZ-2REEL provides power supply monitoring and telemetry functions in telecom and server equipment, where monitoring intermediate bus voltages, output rail health, and current consumption requires accurate periodic digitization. The 12-bit resolution measures supply rails from 0 V to VREF (2.5 V native) with external resistor dividers for higher-voltage rails, while the 500 kSPS sampling rate supports oversampling techniques for noise reduction on noisy switching-converter outputs. The single +5 V supply matches the auxiliary rails typically present in telecom and server systems. Place the part with input dividers on each monitored rail, using the serial interface to minimize pin count in space-constrained monitor boards.
Recomendado
Medical Instrumentation Signal Acquisition
The AD7892ARZ-2REEL handles medical instrumentation signal acquisition for patient monitoring, diagnostic equipment, and laboratory instruments that digitize signals from bio-amplifiers, pressure transducers, and temperature sensors. The 12-bit resolution with ±1 LSB linearity error provides the precision needed for diagnostic-grade equipment when paired with proper front-end amplification, and the SAR architecture's deterministic latency simplifies system timing in real-time monitoring applications. The 500 kSPS sampling rate supports signals up to 200 kHz including ECG, EMG, and pulse oximetry waveforms. Use the part with low-noise instrumentation amplifiers upstream and digital isolation for patient-connected applications requiring IEC 60601 compliance.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD7892ARZ-2REEL — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD7892ARZ-2 | AD7892ARZ-1REEL | AD7892ARZ-5REEL | AD7862ARS-2REEL | AD7863ARZ-2REEL |
|---|---|---|---|---|---|---|
| Package | 24-pin SOIC wide-body (0.295") | 24-pin SOIC wide-body - same | 24-pin SOIC wide-body - same | 24-pin SOIC wide-body - same | 24-pin SOIC wide-body - same | 24-pin SOIC wide-body - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 14 bits |
| Sampling Rate | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 200 kSPS (per channel) |
| Number of Inputs | 2 (dual-input) | 2 (dual-input) | 1 (single-ended) | 1 (single-ended, ±10 V optimized) | 4 (simultaneous sampling) | 2 (simultaneous sampling) |
| Analog Input Range | 0-VREF or ±10 V (pin-strappable) | 0-VREF or ±10 V (pin-strappable) | 0-VREF or ±5/±10 V | ±10 V optimized | ±10 V (true bipolar) | ±10 V (true bipolar) |
| Supply Voltage | +5 V single supply | +5 V single supply | +5 V single supply | +5 V single supply | +5 V single supply | +5 V single supply |
| On-chip Reference | +2.5 V | +2.5 V | +2.5 V | +2.5 V | +2.5 V | External reference required |
| Data Interface | Parallel or Serial | Parallel or Serial | Parallel or Serial | Parallel or Serial | Parallel | Parallel |
Principais diferenciais
- On-chip +2.5 V reference eliminates external reference BOM (vs AD7863ARZ-2REEL)
- Dual-input configuration with pin-strappable input range (vs AD7892ARZ-1REEL)
- Configurable parallel or serial interface on same silicon (vs AD7862ARS-2REEL)
- 500 kSPS throughput with deterministic SAR latency (vs AD7863ARZ-2REEL (200 kSPS per channel, simultaneous sampling))
Notas de projeto
The AD7892 operates from a single +5 V supply, but clean analog supply decoupling is essential for ADC accuracy. Place a 10 µF tantalum capacitor in parallel with a 0.1 µF ceramic capacitor between VDD and AGND, located within 5 mm of the supply pin. The internal +2.5 V reference requires its own decoupling network (typically 10 µF + 0.1 µF) on the REF and REF DEC pins to minimize conversion-cycle noise. Power-supply ripple above 50 mVpp on VDD will couple into conversion results through the LC2MOS analog sections. Estimated: typical 60 mW dissipation at 500 kSPS throughput means ~12 mA from +5 V; double-check when operating at full continuous sampling.
Place the AD7892 with separate analog and digital ground planes joined at a single point near the AGND/DGND pins. Route analog input traces (VIN1, VIN2) as differential pairs or guarded single-ended traces away from digital switching signals (CONVST, BUSY, parallel data bus) to minimize digital-to-analog crosstalk. Use a ground pour on the top layer under the SOIC body for thermal dissipation; the 24-pin SOIC package has adequate thermal resistance for 60 mW continuous operation without external heatsinking. Add 4-6 mounting vias under the exposed area when using thermal-relief pads, but never place vias directly under input traces.
Do not exceed the +5 V absolute maximum on VDD - the AD7892 is not a +3.3 V part and requires the +5 V supply to maintain linearity. Forgetting to bypass the REF DEC pin causes excessive reference noise and degrades linearity by 1-2 LSB. The CONVST pulse must be a clean rising edge without ringing; if driving from a long cable or optocoupler, add a Schmitt trigger buffer (e.g., 74HC14) within 20 mm of the CONVST pin. The MODE pin selects parallel or serial interface and must be hard-wired (not left floating) at board power-up. When using ±10 V input range, verify that VIN2 is hard-tied to AGND for proper range selection.
Estimate: at 500 kSPS throughput, the parallel data bus toggles at ~6 MHz, requiring 50-ohm controlled-impedance routing for traces longer than 25 mm. Place 33-ohm series termination resistors at the DB0-DB11 outputs when driving long bus traces to damp ringing. Group the DB outputs physically together in PCB layout, and keep the digital bus within 50 mm of the receiving FPGA/MCU. The BUSY signal is asynchronous to the system clock and should be treated as an interrupt source, not a polled flag, to avoid timing jitter in the conversion-completion detection.
Informações de conformidade
RoHS compliant per Analog Devices product page. The Z-suffix in AD7892ARZ indicates lead-free / RoHS-compliant packaging. The part is not AEC-Q100 qualified (industrial/commercial grade). REACH compliance status inferred from Analog Devices policy.
