AD7714YRU-REEL7 - 24-bit Sigma-Delta ADC, 5-Ch, 24-TSSOP | ADI
MPN: AD7714YRU-REEL7 ✓ פעילAD7714YRU-REEL7 סקירה
An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Sigma-delta ADCs use oversampling and noise-shaping to achieve very high resolution (16-24 bits) at low sample rates, making them ideal for precision DC and low-frequency measurement applications such as weigh scales, industrial process control, and sensor signal conditioning. Within the IC hierarchy, the AD7714 belongs to the data-converter category, then ADC, then precision sigma-delta ADC, then integrated signal-conditioning ADC.
Key features include 24-bit no-missing-code performance, +/-0.0015% nonlinearity, 140 nV rms noise, gains programmable from 1 to 128, and three fully differential or five pseudo-differential input channels. A three-wire serial interface (SPI/QSPI/MICROWIRE-compatible) reduces isolation overhead, and on-chip self-calibration eliminates zero-scale and full-scale errors plus temperature drift. The Y-grade also includes a low-side power switch for bridge-sensor applications.
Typical applications include weigh scales, strain-gauge transducers, RTD/thermocouple temperature measurement, industrial process control loops, and portable battery-powered instrumentation. The wide gain range lets a single part digitize both low-level thermocouple signals (tens of microvolts) and 0-10 V industrial signals without external amplifiers.
Designers should pay attention to the input common-mode range and avalanche protection; the reference input must remain within the specified common-mode window for the chosen gain. PCB layout should isolate analog and digital grounds with a single-point connection near the ADC.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not directly aggregated on the manufacturer datasheet.
חלופות תחליף ישיר עבור AD7714YRU-REEL7 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
AD7714YRU-REEL
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7714YRUZ-REEL7
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7714YRZ-REEL7
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7714YRUZ
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD7714YRU-REEL7 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 24 bits |
| Number of Input Channels | 3 differential / 5 pseudo-differential |
| ADC Architecture | Sigma-Delta (charge-balancing) |
| Output Data Rate | 1 kSPS max |
| טווח מתח כניסה | -1.25 V to +1.25 V (at gain = 1) |
| Programmable Gain | 1, 2, 4, 8, 16, 32, 64, 128 |
| Nonlinearity | 0.0015% (Y grade) |
| RMS Noise | 140 nV |
| No Missing Codes | 24 bits guaranteed |
| מתח אספקה | 3 V or 5 V nominal |
| זרם אספקה | 500 uA typical |
| טווח טמפרטורת פעולה | -40C to +105C (Y grade) |
| ממשק | 3-wire serial (SPI/QSPI/MICROWIRE-compatible) |
| מארז | 24-TSSOP (RU) |
| סוג הרכבה | Surface Mount |
| Calibration | On-chip self-calibration (zero + full-scale) |
| Schmitt Trigger Inputs | Yes on SCLK and DIN (Y grade) |
| סטטוס RoHS | Compliant |
תצורת פינים של AD7714YRU-REEL7
| פין 1 | SCLK — Serial clock input (Schmitt-triggered, Y grade) |
| פין 2 | DIN — Serial data input (Schmitt-triggered, Y grade) |
| פין 3 | DOUT — Serial data output |
| פין 4 | DRDY — Data ready output (active low) |
| פין 5 | MODE — Operating mode control input |
| פין 6 | SYNC — Synchronization input |
| פין 7 | RESET — Reset input (active low) |
| פין 8 | REF IN+ — Positive reference input |
| פין 9 | REF IN- — Negative reference input |
| פין 10 | AIN1 — Analog input channel 1 |
| פין 11 | AIN2 — Analog input channel 2 |
| פין 12 | AIN3 — Analog input channel 3 |
| פין 13 | AIN4 — Analog input channel 4 |
| פין 14 | AIN5 — Analog input channel 5 / pseudo-differential mode |
| פין 15 | STANDBY — Standby control |
| פין 16 | IOUT — Internal current source (for bridge excitation) |
| פין 17 | AGND — Analog ground |
| פין 18 | AVDD — Analog supply (3 V or 5 V) |
| פין 19 | AVDD — Analog supply (tie to AVDD) |
| פין 20 | DGND — Digital ground |
| פין 21 | DVDD — Digital supply (3 V or 5 V) |
| פין 22 | NC — Not connected (per datasheet) |
| פין 23 | NC — Not connected (per datasheet) |
| פין 24 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
AD7714YRU-REEL7 מתאים עבור 7 יישוםs: Industrial Weigh Scales, Strain-Gauge and Bridge Sensors, RTD and Thermocouple Temperature Measurement, Portable Battery-Powered Instrumentation, Industrial Process Control Loops, Medical Patient Monitoring, Smart Sensor / IoT Edge Nodes.
Industrial Weigh Scales
The AD7714YRU-REEL7 is a primary choice for industrial weigh scales because its 24-bit no-missing-codes resolution and 0.0015% nonlinearity directly determine load-cell measurement accuracy. The on-chip programmable gain of 1-128 lets a single ADC digitize the full-bridge strain-gauge output (typically 1-3 mV/V) without an external instrumentation amplifier, reducing BOM cost. The Y-grade -40C to +105C range and Schmitt-trigger inputs on SCLK and DIN ensure robust operation in factory-floor EMI environments.
מומלץ
Strain-Gauge and Bridge Sensors
For strain-gauge and Wheatstone-bridge transducers the AD7714YRU-REEL7 integrates low-side power switches that drive the bridge directly, eliminating a discrete MOSFET and simplifying PCB layout. The 140 nV rms noise at low output data rates enables microstrain resolution. Programmable gains up to 128 condition bridges producing only a few millivolts full-scale, while the on-chip self-calibration removes zero-scale and full-scale drift across the operating temperature range.
מומלץ
RTD and Thermocouple Temperature Measurement
The AD7714YRU-REEL7 digitizes RTD and thermocouple signals directly thanks to its programmable gain up to 128 and true bipolar inputs. A type-K thermocouple at 200C produces only ~8 mV; the AD7714 amplifies this with gain 128 and resolves to better than 0.1C using its on-chip digital filtering. The Y-grade -40C to +105C range and 500 uA supply suit remote, battery-powered temperature transmitters in industrial process loops.
מומלץ
Portable Battery-Powered Instrumentation
With only 500 uA typical supply current, the AD7714YRU-REEL7 is well-suited for portable, battery-powered data-acquisition modules such as handheld multimeters and field calibrators. The 3 V supply compatibility lets it run directly from two AA cells. Power-down mode via the MODE pin drops current further to <10 uA, enabling multi-year battery life in periodic-sampling applications. The TSSOP-24 package supports compact handheld enclosures.
מומלץ
Industrial Process Control Loops
The AD7714YRU-REEL7 is widely deployed in 4-20 mA loop-powered transmitters and PLC analog input modules because of its high noise rejection (programmable digital filter) and wide common-mode input range. The Schmitt-triggered SCLK/DIN tolerate the long cables and ground-potential differences typical of process plants. Three fully differential inputs accommodate multi-channel pressure, flow, and level transmitters on a single ADC.
מומלץ
Medical Patient Monitoring
The AD7714YRU-REEL7's 24-bit resolution and 140 nV noise enable precision measurement of biopotential signals in medical patient monitors, including ECG, respiration impedance, and temperature channels. Its 500 uA current consumption allows integration into compact bedside or wearable monitors. The on-chip calibration removes drift over the device lifetime, supporting long calibration intervals mandated by medical device standards.
מומלץ
Smart Sensor / IoT Edge Nodes
The AD7714YRU-REEL7 fits smart-sensor and IoT edge-node designs that digitize multiple analog sensors (temperature, pressure, flow) directly into a low-cost MCU. The SPI-compatible serial interface reduces pin count, allowing use with 8-bit MCUs in space-constrained nodes. Combined with an external MCU's wireless transceiver, the AD7714YRU-REEL7 enables battery-powered wireless sensor networks for industrial IoT and smart-building applications.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AD7714YRU-REEL7 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | AD7714YRU-REEL | AD7714YRUZ-REEL7 | AD7714YRZ-REEL7 | AD7714YRUZ |
|---|---|---|---|---|---|
| Package | 24-TSSOP (RU) | 24-TSSOP (RU) - same | 24-TSSOP (RU) - same | 24-TSSOP (RU) - same | 24-TSSOP (RU) - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Resolution | 24 bits | 24 bits | 24 bits | 24 bits | 24 bits |
| Reference Type | External | External | Internal | Internal | Internal |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| Channels (Diff/Pseudo) | 3 / 5 | 3 / 5 | 3 / 5 | 3 / 5 | 3 / 5 |
| RoHS Compliance | Yes (REEL7 = lead-free reel) | Varies (REEL, leaded option) | Yes | Yes (R suffix) | Yes |
מבדילים עיקריים
- Industrial Y-grade temperature range with Schmitt-triggered serial inputs (לעומתAD7714AN (A-grade predecessor))
- Integrated bridge-excitation current source (לעומתDiscrete load-cell ADC chains)
- True bipolar +/-1.25 V inputs at gain = 1 (לעומתUnipolar-input ADCs (e.g. AD7799))
הערות תכנון
Estimated: the AD7714YRU-REEL7 TSSOP-24 land pattern requires ~6.4 mm x 5.0 mm board area. Route analog and digital grounds as separate islands that join at a single point beneath the AGND pin. Place the 0.1 uF AVDD/DVDD decoupling capacitors within 3 mm of their respective supply pins, and add a 10 uF bulk tantalum close to the package. Use a guarded analog ground plane under the input traces to minimize leakage for high-gain (>=64) configurations.
Estimated: the AD7714YRU-REEL7 consumes 500 uA typical at 5 V, which is ~2.5 mW; at 3 V it is ~1.5 mW. Ensure the AVDD rail has less than 50 uV rms ripple to avoid degrading the ADC's 140 nV noise floor - a low-noise LDO such as ADP3338 is recommended. The DRDY pin transitions every output-data-rate interval; route it away from SCLK to avoid coupling.
When using gains of 32 or higher, the input signal amplitude can be below 40 mV full-scale. Use guarded input traces, low-thermal-EMF connectors (avoid Kovar pins), and a low-bias-current front-end op-amp such as the AD8628 (5 pA bias). For thermocouple inputs, add a common-mode RC filter (1 kohm + 10 nF) at each AIN pin to suppress RF interference that would otherwise rectify inside the ESD diodes.
Do not apply signals to AIN1-AIN5 before powering up AVDD - the absolute maximum rating on the analog inputs is AVDD+0.3 V. Always run the on-chip self-calibration sequence after power-up and after any gain change, otherwise offset and gain errors will exceed datasheet limits. The MODE pin must not be left floating; tie it high or low per the desired operating mode.
מידע על תאימות
RoHS and lead-free status per the AD7714 datasheet and Digi-Key product page (P/N 619534). REACH compliance inferred from Analog Devices corporate policy; not explicitly stated on the product page. The -REEL7 suffix confirms lead-free reel packaging. AEC-Q100 is not applicable - this is a precision analog component, not an automotive-qualified device; industrial temperature range provided.
