AD7893ARZ-10REEL - 12-Bit 117 ksps Serial ADC, 8-SOIC | Analog Devices
MPN: AD7893ARZ-10REEL ✓ Hoạt độngAD7893ARZ-10REEL Tóm tắt
What is a SAR ADC? A successive-approximation-register ADC is a precision data converter that uses a binary-search algorithm and an internal DAC to digitize an analog input one bit at a time. Within the broader hierarchy, a SAR ADC belongs to the ADC family, which in turn sits under data converters (ADC/DAC), mixed-signal ICs, and ultimately the broader semiconductor category. SAR ADCs are valued for their deterministic latency, low power, and excellent DC accuracy, making them a default choice for industrial process control, instrumentation, and precision monitoring.
Key features of the AD7893 include 12-bit resolution with no missing codes, typical linearity of +/-1 LSB, low power consumption of approximately 25 mW, and an operating temperature range of -40C to +85C. The device is fabricated in Analog Devices' Linear Compatible CMOS (LC2MOS) mixed-signal process, which combines precision bipolar circuits with low-power CMOS logic to deliver accurate conversions with low power dissipation. The integrated track-and-hold amplifier acquires bipolar input signals in under 1 us, allowing accurate digitization of fast-moving signals without external front-end conditioning in most applications.
Typical applications include industrial process control, data acquisition systems, motor control feedback loops, instrumentation, and battery-powered portable measurement equipment. The wide +/-10 V input range makes the part well-suited to industrial signal levels directly off sensors and transducers, while the serial interface reduces pin count and isolates noisy digital switching from the analog input path.
When designing with the AD7893ARZ-10REEL, place decoupling capacitors (typically 10 uF tantalum in parallel with 0.1 uF ceramic) as close as possible to the supply and reference pins. Keep the analog input traces short and guarded, and consider an RC input filter if the source impedance is significant. The SCLK and DOUT lines should be length-matched and routed away from noisy switching nodes to preserve conversion integrity.
This page synthesizes distributor pricing, drop-in alternatives, and design considerations not found on the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho AD7893ARZ-10REEL — 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 AD7893ARZ-10REEL (cùng hình factor và footprint) — khác nhau ở Conversion Time, Packaging, Input Type, Package, Architecture.
AD7893AR-10REEL
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD7893ARZ-10REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7893ARZ-10
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD7893BRZ-10REEL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD7893ARZ-5REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7893ARZ-10REEL Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices |
| Part Number | AD7893ARZ-10REEL |
| Độ phân giải | 12 bit |
| Number of Inputs | 1 |
| Converter Type | SAR (Successive Approximation) |
| Conversion Time | 6 us |
| Tỷ lệ lấy mẫu | 117 ksps |
| Input Range (Bipolar) | -10 V to +10 V |
| Điện áp cung cấp | +5 V single supply |
| Power Dissipation | 25 mW typical |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 8-pin SOIC (R-8 / SOIC-8) |
| Giao diện | Serial (high-speed) |
| On-chip Track/Hold | Yes |
| On-chip Clock | Yes |
| Process Technology | LC2MOS (Linear Compatible CMOS) |
| Screening Level | Industrial |
| Kiểu lắp đặt | Surface Mount |
| RoHS Compliance | Yes (Z suffix) |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
Cấu hình chân AD7893ARZ-10REEL
| Chân 1 | VDD — +5 V analog supply |
| Chân 2 | VIN — Analog input (-10 V to +10 V) |
| Chân 3 | REF — External reference voltage input / decoupling |
| Chân 4 | GND — Analog ground |
| Chân 5 | SCLK — Serial clock input |
| Chân 6 | DOUT — Serial data output |
| Chân 7 | CONVST — Conversion start input |
| Chân 8 | CS — Chip select, active low |
Ứng dụng tiêu biểu
AD7893ARZ-10REEL phù hợp cho 6 Áp dụngs: Industrial Process Control Data Acquisition, Portable Battery-Powered Instrumentation, Motor Control Feedback Loops, Precision Sensor Signal Digitization, Data Acquisition Systems (DAQ), Medical Patient Monitoring Equipment.
Industrial Process Control Data Acquisition
The AD7893ARZ-10REEL fits industrial process-control front-ends because of its bipolar -10 V to +10 V input range, which directly digitizes the +/-10 V standard used by PLC analog I/O modules without external signal conditioning. Its 117 ksps throughput and 6 us conversion time support multi-channel multiplexing of 4-20 mA-derived signals through external switches. The integrated track-and-hold eliminates front-end buffer requirements, while 25 mW typical power dissipation keeps heat low in DIN-rail-mounted modules. Place input RC anti-aliasing filters tuned to the conversion rate, and use the Z-suffix variant for RoHS-compliant industrial designs.
Được đề xuất
Portable Battery-Powered Instrumentation
The AD7893ARZ-10REEL suits portable measurement instruments because it draws only 25 mW from a single +5 V supply and integrates the clock, track-and-hold, and serial interface in an 8-pin SOIC. The serial interface also reduces microcontroller pin count, lowering total system BOM and quiescent draw. The industrial -40C to +85C temperature range supports field deployment. For handheld multimeters, data acquisition loggers, and portable medical monitors, the AD7893's small footprint and low power enable compact battery-operated enclosures with reliable 12-bit conversion accuracy.
Được đề xuất
Motor Control Feedback Loops
The AD7893ARZ-10REEL works well in motor-control current and position feedback loops because its 6 us conversion time gives deterministic latency for closed-loop control algorithms running at typical PWM frequencies up to 20 kHz. The bipolar -10 V to +10 V input range accepts shunt-derived current signals directly, while the high-speed serial interface keeps feedback traces short and isolated from power-stage switching noise. Used as a digital current sense in FOC or trapezoidal commutation schemes, the AD7893 helps decouple noisy power electronics from sensitive analog feedback.
Được đề xuất
Precision Sensor Signal Digitization
The AD7893ARZ-10REEL digitizes outputs of strain-gauge bridges, thermocouple amplifiers, pressure transducers, and load cells because its bipolar +/-10 V input range accommodates the full sensor span. The 12-bit resolution (1 LSB = 4.88 mV at +/-10 V) is sufficient for most industrial sensors, while the integrated track-and-hold ensures accurate sampling of fast-changing signals. Combined with a precision op-amp buffer like the AD8628, the AD7893 delivers repeatable measurements in weigh scales, force testers, and process monitoring equipment.
Được đề xuất
Data Acquisition Systems (DAQ)
The AD7893ARZ-10REEL is well-suited to multi-channel DAQ cards where a small footprint and serial interface simplify routing across isolation barriers. Multiple AD7893s can share a common SCLK and DOUT line through individual CS pins, building a synchronized multi-channel acquisition front-end in a compact PCB area. The bipolar input range supports a mix of +/-10 V and +/-5 V industrial signals, while the 117 ksps throughput aggregates up to 8 channels at 10 kHz per channel. Use opto-couplers or digital isolators for high-voltage channel-to-controller isolation.
Được đề xuất
Medical Patient Monitoring Equipment
The AD7893ARZ-10REEL serves in medical patient-monitoring equipment where moderate 12-bit resolution, low power, and serial interface fit bedside monitors measuring ECG-derived signals, respiration, temperature, and other analog physiological parameters. Its bipolar +/-10 V input accommodates raw sensor outputs directly, while the integrated track-and-hold simplifies analog front-ends. Industrial temperature grade and LC2MOS reliability support regulated medical device designs. The small 8-SOIC package suits compact, portable patient-worn designs where PCB area is at a premium.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7893ARZ-10REEL — 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 | AD7893AR-10REEL | AD7893ARZ-10REEL7 | AD7893ARZ-10 | AD7893BRZ-10REEL | AD7893ARZ-5REEL |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (R-8) | SOIC-8 (R-8) - same | SOIC-8 (R-8) - same | SOIC-8 (R-8) - same | SOIC-8 (R-8) - same | SOIC-8 (R-8) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Input Range | -10 V to +10 V | -10 V to +10 V | -10 V to +10 V | -10 V to +10 V | -10 V to +10 V | -5 V to +5 V |
| Sampling Rate | 117 ksps | 117 ksps | 117 ksps | 117 ksps | 117 ksps | 117 ksps |
| Conversion Time | 6 us | 6 us | 6 us | 6 us | 6 us | 6 us |
| Linearity (INL) | +/-1 LSB max (A-grade) | +/-1 LSB max (A-grade) | +/-1 LSB max (A-grade) | +/-1 LSB max (A-grade) | +/-0.5 LSB max (B-grade, tighter) | +/-1 LSB max (A-grade) |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| RoHS | Yes (Z-suffix) | No (non-Z) | Yes (Z-suffix) | Yes (Z-suffix) | Yes (Z-suffix) | Yes (Z-suffix) |
Bảo phân biệt quan trọng
- True bipolar +/-10 V input span in an 8-SOIC ADC (vsAD7893ARZ-5REEL)
- Tighter linearity grade option in same footprint (vsAD7893BRZ-10REEL (B-grade) vs AD7893ARZ-10REEL (A-grade))
- Integrated track-and-hold, clock, and serial interface (vsAD7892BR-1 (parallel 24-pin))
Ghi chú thiết kế
Place a 10 uF tantalum bulk capacitor in parallel with a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) and GND (pin 4). The REF pin (pin 3) also requires a 0.1 uF ceramic bypass to ground. Short, wide traces to the analog ground plane minimize ground bounce. Avoid running digital SCLK or CONVST traces beneath the analog input pin or reference pin to prevent digital-to-analog coupling.
Keep the analog input trace at pin 2 as short as possible and surround it with a ground guard ring or analog ground pour to reject injected switching noise. Add a small RC anti-aliasing filter (typically 100 ohms and 10 nF, yielding ~160 kHz bandwidth) at the analog input if the source impedance exceeds a few hundred ohms or fast transients are present. The on-chip track-and-hold requires the input to settle within the acquisition window for accurate conversion.
Do not select an AD7893 suffix without verifying the input range: -10 (bipolar +/-10 V), -5 (bipolar +/-5 V), -2 (unipolar 0-2.5 V), and -3 (unipolar 0-5 V) are all factory-configured and not field-reconfigurable. Driving the analog input beyond +/-10 V (for the -10 variant) damages the input ESD structures. Ensure CONVST is held high during SCLK transitions; otherwise data framing on DOUT will be misaligned and conversion results corrupted. The serial interface is read-only - there is no SDIN pin.
The AD7893 dissipates approximately 25 mW typical at 117 ksps, which is well within the SOIC-8 thermal envelope of approximately 100 C/W theta_JA on a 1 square inch copper pour. No heatsink is required. At elevated ambient temperatures above 70C, ensure the surrounding analog ground plane remains unbroken near the SOIC pads to spread heat laterally and avoid localized hot spots that could shift reference voltage.
Thông tin tuân thủ
Z-suffix confirms RoHS compliance per the ADI ordering guide. Part is not AEC-Q100 qualified; use automotive-grade SAR ADCs from ADI's automotive portfolio for vehicle applications. REACH compliance per ADI product statements.
