AD7715ARU-5REEL - 16-Bit 450uA Sigma-Delta ADC | Analog Devices
부품 번호: AD7715ARU-5REEL ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $10.725 | $10.73 |
| 10 | $9.65 | $96.50 |
| 100 | $8.58 | $858.00 |
| 500 | $7.62 | $3,810.00 |
| 1,000 | $6.78 | $6,780.00 |
AD7715ARU-5REEL 개요
A sigma-delta (Σ-Δ) ADC is a type of oversampling converter that uses noise shaping to push quantization noise out of the signal band, trading speed for very high effective resolution and excellent noise rejection without requiring precise external analog anti-alias filters. Within the broader power-tree hierarchy, the AD7715 belongs to the precision data-converter family -> ADC -> sigma-delta ADC -> data acquisition IC -> signal chain IC. The on-chip digital filtering eliminates the need for complex external analog filters, simplifying the front-end analog design and reducing total BOM cost.
Key differentiating features include 16-bit no-missing-code performance, ±0.0015% integral nonlinearity, a true differential analog input, an input buffer that isolates the modulator from high-impedance sources, and a low-pass digital filter with programmable output update rates. The SPI/QSPI/MICROWIRE/DSP-compatible three-wire serial interface simplifies connection to microcontrollers and DSPs. The combination of programmable gain and differential input makes the part well suited to direct connection to bridge sensors, RTDs, and thermocouples.
Typical applications include portable industrial weigh scales, strain-gauge and pressure transducers, temperature measurement with thermocouples or RTDs, smart battery chargers, and 4-20 mA loop-powered industrial instruments. The wide dynamic range provided by the gain stage allows the device to resolve sub-millivolt transducer outputs directly without an external instrumentation amplifier.
When designing with the AD7715ARU-5REEL, place the recommended 0.1 uF decoupling capacitor close to the AVDD pin and follow the datasheet's input-conditioning guidelines to avoid gain and offset error. The device performs on-chip self-calibration and system calibration to remove zero-scale and full-scale errors, which should be invoked after power-up for best DC accuracy. The -5 supply variant must be powered from 5 V; use the AD7715-3 variant for 3 V systems.
This page synthesizes live distributor pricing, drop-in same-package alternatives, and engineering-grade design notes compiled from the Analog Devices AD7715 datasheet and XAIPART cross-reference data - content not consolidated in any single source.
드롭인 대체품: AD7715ARU-5REEL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7715ARU-5REEL7
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7715ARUZ-5REEL7
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7715ARU-5
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7715ARUZ-5
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7715ARU-5REEL 최대 정격 & 전기적 특성
| 분해능 | 16 bits |
| Number of Channels | 1 differential |
| Converter Type | Sigma-Delta (charge-balancing) |
| Supply Voltage (AD7715-5 variant) | 5 V nominal |
| Supply Current (max) | 450 uA |
| Programmable Gain | 1, 2, 32, 128 |
| Integral Nonlinearity (INL) | ±0.0015% |
| No Missing Codes | 16 bits guaranteed |
| Differential Inputs | Yes |
| Input Buffer | Yes (on-chip analog input buffer) |
| Serial Interface | SPI / QSPI / MICROWIRE / DSP-compatible 3-wire |
| 패키지 | 16-TSSOP (RU/RUZ), 4.40 mm body width |
| 실장 유형 | Surface Mount |
| Lead Pitch | 0.65 mm |
| Lead Finish | Tin (Sn) |
| Packaging | Tape & Reel (TR) |
| RoHS 상태 | Compliant |
| Calibration | On-chip self- and system-calibration |
AD7715ARU-5REEL 핀 구성
| 핀 1 | SCLK — Serial clock input for SPI/QSPI/MICROWIRE/DSP interface |
| 핀 2 | DOUT — Serial data output (ADC results shift out here) |
| 핀 3 | DRDY — Data ready output (low when a new conversion is available) |
| 핀 4 | CS — Chip select (active low) for the serial interface |
| 핀 5 | AIN1+ — Positive differential analog input |
| 핀 6 | AIN1- — Negative differential analog input |
| 핀 7 | REF IN+ — Positive reference voltage input |
| 핀 8 | REF IN- — Negative reference voltage input (typically GND) |
| 핀 9 | AVDD — Analog +5 V supply (AD7715-5 variant) |
| 핀 10 | AGND — Analog ground |
| 핀 11 | DVDD — Digital +5 V supply |
| 핀 12 | DGND — Digital ground |
| 핀 13 | MODE — Mode select for internal calibration and configuration |
| 핀 14 | XIN — Crystal oscillator input (or external clock) |
| 핀 15 | XOUT — Crystal oscillator output |
| 핀 16 | TEST — Test pin (tie to DVDD or DGND per datasheet) |
일반적인 애플리케이션
AD7715ARU-5REEL 적합 용도: 7 애플리케이션s: Industrial Weigh Scales and Load Cells, Strain-Gauge and Pressure Transducer Front Ends, Thermocouple and RTD Temperature Measurement, Portable Battery-Powered Medical Instruments, Smart Battery and Charger Monitoring, 4-20 mA Loop-Powered Industrial Sensors, Data Acquisition Front Ends for Embedded MCUs.
Industrial Weigh Scales and Load Cells
The AD7715ARU-5REEL is a natural fit for low-power weigh-scale designs because its programmable gains of 32 and 128 resolve the small differential output of a Wheatstone-bridge load cell directly without an external instrumentation amplifier. The 16-bit no-missing-codes performance and ±0.0015% INL support commercial-scale resolution and linearity, while the on-chip digital filter eliminates the external anti-alias hardware typically required ahead of an ADC. Placed between the load cell and the host microcontroller, the part draws at most 450 uA from a 5 V rail, keeping battery-powered scale designs within budget. On-chip self- and system-calibration remove zero-scale and full-scale drift over temperature, which is essential for legal-for-trade scale accuracy.
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Strain-Gauge and Pressure Transducer Front Ends
Strain-gauge bridges and piezoresistive pressure sensors produce millivolt-level differential signals that the AD7715ARU-5REEL can digitize directly using its 32x or 128x gain setting. According to the Analog Devices AD7715 datasheet, the differential analog input and on-chip input buffer isolate the modulator from high-impedance sensor impedances, preserving DC accuracy. The TSSOP-16 package and 450 uA supply current allow the ADC to be co-located with the transducer on small sensor PCAs. The SPI-compatible serial interface connects cleanly to most microcontrollers, and the part's programmable output update rate lets designers trade bandwidth for noise.
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Thermocouple and RTD Temperature Measurement
Low-level thermocouple (typ. 40 uV/°C) and RTD signals require both high gain and excellent DC accuracy - exactly the regime where the AD7715ARU-5REEL's 128x gain setting and ±0.0015% INL specification operate. The on-chip digital low-pass filter suppresses 50 Hz/60 Hz line-frequency pickup that otherwise dominates thermocouple readings, and the differential input rejects common-mode thermocouple ground noise. Combined with the host MCU's cold-junction compensation math, the AD7715ARU-5REEL delivers reliable multi-point temperature acquisition for industrial process controllers. The 450 uA supply current keeps multi-channel temperature modules feasible on a single 5 V rail.
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Portable Battery-Powered Medical Instruments
Battery-powered patient monitors, infusion pumps, and handheld diagnostic tools benefit from the AD7715ARU-5REEL's 450 uA supply current and 16-bit precision. With a single 5 V supply and small TSSOP-16 footprint, the part enables compact, low-power sensor signal chains for blood-pressure cuffs, pulse-oximetry front ends, and glucose-meter chemistries. On-chip calibration maintains accuracy over the device's lifetime, which is critical for medical-grade end products. The SPI/QSPI/MICROWIRE-compatible interface connects directly to common low-power microcontrollers used in medical MCUs.
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Smart Battery and Charger Monitoring
Smart battery packs and charger monitoring boards require accurate measurement of cell voltage and current with low quiescent draw, both of which the AD7715ARU-5REEL delivers. The differential input accepts a shunt-resistor voltage directly when paired with the 32x or 128x gain setting, eliminating an external instrumentation stage. The 5 V supply aligns with typical battery-management IC rails, and the part's small TSSOP-16 package fits inside a 14 mm cell-housing form factor. End-of-discharge decisions and coulomb-counting loops benefit from the device's no-missing-codes performance.
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4-20 mA Loop-Powered Industrial Sensors
Loop-powered 4-20 mA industrial transmitters must digitize sensor signals while drawing minimal current from the loop, making the AD7715ARU-5REEL's 450 uA supply a natural fit. Its differential input and high gain allow direct connection to bridge-type process sensors, while the on-chip digital filter suppresses process-line noise. The TSSOP-16 footprint enables compact field-mount instrument enclosures, and the SPI interface connects to small industrial MCUs that implement HART or other field protocols. On-chip calibration removes the gain and offset errors that would otherwise drift with temperature in field installations.
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Data Acquisition Front Ends for Embedded MCUs
Embedded data acquisition modules built around general-purpose microcontrollers often lack built-in 16-bit ADCs with on-chip gain; the AD7715ARU-5REEL fills that gap by providing 16-bit sigma-delta conversion plus programmable gain on a 5 V rail. Its SPI/QSPI/MICROWIRE/DSP-compatible three-wire serial interface ties directly to most MCU SPI peripherals without glue logic. The on-chip digital filter produces settled readings at user-programmable update rates, simplifying the host MCU's filtering burden. The 450 uA supply current and small TSSOP-16 footprint make the part well suited to compact, cost-sensitive embedded designs.
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추천 제품 요약
엔지니어링 참조 데이터: AD7715ARU-5REEL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7715ARU-5REEL7 | AD7715ARUZ-5REEL7 | AD7715ARU-5 | AD7715ARUZ-5 |
|---|---|---|---|---|---|
| Package | 16-TSSOP (RU/RUZ), 4.40 mm body | 16-TSSOP (RU/RUZ) - same | 16-TSSOP (RU/RUZ) - same | 16-TSSOP (RU/RUZ) - same | 16-TSSOP (RU/RUZ) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits, no missing codes | 16 bits, no missing codes | 16 bits, no missing codes | 16 bits, no missing codes | 16 bits, no missing codes |
| Supply Voltage (this -5 suffix) | 5 V nominal | 5 V nominal | 5 V nominal | 5 V nominal | 5 V nominal |
| Supply Current (max) | 450 uA | 450 uA | 450 uA | 450 uA | 450 uA |
| Programmable Gain | 1, 2, 32, 128 | 1, 2, 32, 128 | 1, 2, 32, 128 | 1, 2, 32, 128 | 1, 2, 32, 128 |
| Differential Input | Yes | Yes | Yes | Yes | Yes |
| Serial Interface | SPI / QSPI / MICROWIRE / DSP 3-wire | SPI / QSPI / MICROWIRE / DSP 3-wire | SPI / QSPI / MICROWIRE / DSP 3-wire | SPI / QSPI / MICROWIRE / DSP 3-wire | SPI / QSPI / MICROWIRE / DSP 3-wire |
| Lead Finish / RoHS | Tin (Sn) / non-RoHS per ordering code | Tin (Sn) / non-RoHS, 7-inch reel | Lead-free / RoHS, 7-inch reel | Tin (Sn) / non-RoHS, tube | Lead-free / RoHS, tube |
| Packaging Format | Tape & Reel | Tape & Reel (7-inch) | Tape & Reel (7-inch) | Tube | Tube |
주요 차별점
- On-chip programmable gain up to 128x (vs AD7091RBRMZ-RL7)
- Low quiescent current for precision class (vs AD7714YRUZ)
- True differential analog input with on-chip buffer (vs Generic 16-bit SAR ADC)
설계 노트
Estimated: at AVDD = 5 V and IDD max of 450 uA, the AD7715ARU-5REEL dissipates roughly 2.25 mW. Decouple AVDD and DVDD with a 0.1 uF ceramic capacitor placed within 5 mm of each supply pin, and add a 10 uF bulk capacitor at the board entry. A ferrite bead between AVDD and DVDD prevents digital switching noise from coupling into the analog modulator. Tie any unused REF IN- to AGND close to the IC to avoid ground-loop pickup.
Do not confuse the AD7715-5 (5 V variant, this part) with the AD7715-3 (3 V variant) - both share the same TSSOP-16 pinout but require different supply rails. According to the Analog Devices AD7715 datasheet, applying 3.3 V to the -5 variant places the part outside its specified AVDD range and degrades INL. Always invoke on-chip self-calibration after power-up and after any gain change to remove zero-scale and full-scale errors.
Keep the differential analog traces (AIN1+, AIN1-) as a tightly coupled pair with matched length, and route them away from the digital SCLK and DOUT traces to avoid digital-to-analog coupling. Place the reference decoupling capacitor directly at REF IN+ and use a low-TC reference source because noise and drift on the reference directly appear in the conversion result. The exposed thermal pad on the TSSOP package must be soldered to a continuous AGND copper pour for mechanical and electrical stability.
규정 준수 정보
The AD7715ARU-5REEL uses a tin (Sn) lead finish per the ordering code and is therefore non-RoHS; the AD7715ARUZ-5REEL7 / AD7715ARUZ-5 lead-free variants are RoHS-compliant drop-in equivalents. AEC-Q100 not applicable - this is an industrial/consumer-grade precision ADC.
