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Analog Devices Inc. AD7715AR-5REEL
- Part No.:
- AD7715AR-5REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7715AR-5REEL.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,071
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Product details
Overview
AD7715AR-5REEL from Analog Devices is a 16-bit sigma-delta analog-to-digital converter (ADC) with charge-balancing architecture, programmable gain front end (gains of 1, 2, 32, 128), differential input capability, and three-wire SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface. It operates at 5 V supply, draws ≤450 µA total current, and delivers 16-bit no-missing-codes performance for precision low-frequency transducer signal acquisition in industrial sensor systems.
For engineers reviewing the AD7715AR-5REEL datasheet, AD7715AR-5REEL pinout, AD7715AR-5REEL application, or AD7715AR-5REEL equivalent, key selection considerations include its 5 V operation mode, 0.0015% integral nonlinearity, ±20 mV to ±2.5 V bipolar input range support, on-chip digital filtering with programmable notch frequency, and self/system calibration capability for offset and full-scale error correction.
Technical Context
The AD7715AR-5REEL implements a sigma-delta modulator followed by an on-chip digital filter with first-notch frequency programmable via control registers, enabling adjustable output update rates and rejection of 50 Hz/60 Hz line interference. Its analog path includes a programmable-gain amplifier (PGA) and optional input buffer, supporting both unipolar (0 mV–2.5 V) and bipolar (±20 mV–±2.5 V) input ranges referenced to AGND.
It features dual power domains (AVDD = 5 V, DVDD = 3–5 V), separate analog/digital grounds (AGND/DGND), differential reference inputs (REF IN(+) and REF IN(−)), and a 16-bit serial data output with DRDY handshake. Calibration modes-zero-scale, full-scale, and system-level-are software-configurable via its three-wire interface and internal register bank.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit no missing codes - guarantees monotonicity and full code coverage across full-scale range. |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high accuracy in precision measurement without post-conversion linearization. |
| Supply Voltage | AVDD = 4.75–5.25 V - supports robust 5 V industrial bus operation with ±2.5% tolerance. |
| Supply Current | ≤450 µA at 3 V supplies (typical 1 MHz clock); ≤1.1 mA at 5 V with buffered input & high gain - enables low-power battery or isolated sensor node use. |
| Input Range (Bipolar) | ±20 mV, ±80 mV, ±1.25 V, ±2.5 V - selectable via PGA gain and B/U bit, directly interfaces strain gauges and RTDs without external amplification. |
| 50/60 Hz Rejection | 98 dB normal-mode, 150 dB common-mode - achieved via programmable digital filter notch, eliminating need for external line-frequency filters. |
| Reference Input | REF IN(+) − REF IN(−) = 2.5 V nominal - matches standard precision voltage references and enables ratiometric measurements. |
Pinout & Package
AD7715AR-5REEL is housed in a 16-lead SOIC_W (0.3 inch wide) package with gull-wing leads, RoHS-compliant, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Controls timing of serial data transfer; compatible with SPI/QSPI/MICROWIRE protocols; enables synchronous read/write to internal registers. |
| DOUT | Serial data output | Three-state output delivering conversion results and register contents; driven only when CS is low and SCLK active. |
| DIN | Serial data input | Accepts configuration commands (setup, communications, test registers) and calibration triggers over same three-wire bus. |
| CS | Chip select | Active-low enable for serial interface; must be asserted before SCLK transitions to initiate communication. |
| DRDY | Data ready indicator | Open-drain output signals valid conversion data available; used for interrupt-driven or polled data acquisition. |
| RESET | Hardware reset | Asynchronous active-low input that clears internal registers and resets state machine to power-on default. |
| MCLK IN / MCLK OUT | Master clock terminals | Support crystal/resonator (across both pins) or external CMOS clock (MCLK IN only); determines ADC sampling rate and filter timing. |
| AIN(+), AIN(−) | Differential analog inputs | Accept low-level transducer signals; input common-mode range extends from AGND to AVDD; supports buffered/unbuffered modes. |
| REF IN(+), REF IN(−) | Differential reference inputs | Define full-scale range; 2.5 V nominal difference required for AD7715AR-5REEL; enables ratiometric accuracy against sensor excitation. |
| AVDD, DVDD | Analog/digital supply rails | AVDD = 4.75–5.25 V (analog section); DVDD = 3–5.25 V (digital I/O); separate supplies reduce noise coupling between domains. |
| AGND, DGND | Analog/digital ground returns | Must be connected at single point near device; separation preserves PSRR and prevents digital switching noise from corrupting analog measurements. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain front end (1, 2, 32, 128) | Eliminates external signal conditioning for microvolt-level transducer outputs, reducing BOM count and layout complexity. |
| On-chip self-calibration and system calibration | Removes zero-scale and full-scale errors without external equipment; recalibration at temperature corrects drift up to 0.5 µV/°C. |
| Differential analog and reference inputs | Rejects common-mode noise and ground loop errors; supports true ratiometric measurement when paired with bridge sensors. |
| Three-wire serial interface (SPI/QSPI/MICROWIRE/DSP) | Minimizes interconnect count in microcontroller- or DSP-based systems; reduces optocoupler count in isolated industrial interfaces. |
| Low-power standby mode (≤20 µA) | Enables duty-cycled operation in battery-powered instrumentation; power-down initiated via register write or MCLK disable. |
Applications
| Pressure Measurement | Temperature Measurement |
|---|---|
Use Scenario: High-accuracy pressure sensing in industrial process control using silicon piezoresistive bridges. IC Role / Device Role / Timing Role: Front-end ADC digitizing mV-level bridge output with programmable gain and 50/60 Hz line rejection. Use Value: Delivers 16-bit resolution and ±0.0015% INL without external amplifiers or notch filters, enabling direct connection to 350 Ω or 1 kΩ bridges. |
Use Scenario: Precision RTD or thermistor readout in HVAC and environmental monitoring systems. IC Role / Device Role / Timing Role: Low-noise ADC converting resistance-derived voltage with on-chip calibration to compensate for lead wire resistance and self-heating. Use Value: Supports 4-wire RTD configurations via differential inputs and eliminates offset drift (0.5 µV/°C) through system calibration at operating temperature. |
| Smart Transmitters | Industrial Weigh Scales |
Use Scenario: 4–20 mA HART-enabled field transmitter with local digital processing and diagnostics. IC Role / Device Role / Timing Role: Primary measurement ADC interfacing strain gauge load cells; communicates via three-wire serial bus to host MCU. Use Value: Integrates PGA, digital filter, and calibration logic in one chip-reducing PCB area and enabling firmware-updatable calibration coefficients. |
Use Scenario: Platform scales requiring sub-gram resolution under varying ambient conditions. IC Role / Device Role / Timing Role: High-resolution ADC capturing low-amplitude signals from load cell arrays with simultaneous 50/60 Hz interference suppression. Use Value: Achieves 98 dB normal-mode and 150 dB common-mode rejection at line frequency, removing need for external analog filtering or shielded cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7714BRUZ | 24-bit resolution, 10-channel multiplexed input, 5 V operation, higher power (1.2 mA typical), no buffer option. | Targets multi-sensor systems requiring higher resolution and channel count; lacks input buffer for high-impedance sources. | Select AD7714BRUZ when >16-bit resolution and multi-channel scanning are required; AD7715AR-5REEL preferred for single-channel, low-power, buffered-input designs. |
| ADS124S08IPW | 24-bit, 4-channel, integrated PGA (1–128), 5 V supply, lower current (350 µA), built-in temperature sensor and burnout detection. | Designed for sensor signal chains with diagnostics; includes features not present in AD7715AR-5REEL (e.g., open-wire detection). | Choose ADS124S08IPW for new designs needing enhanced diagnostics and higher resolution; AD7715AR-5REEL remains optimal for legacy 16-bit, cost-sensitive, or space-constrained transducer interfaces. |
Compared with AD7714BRUZ and ADS124S08IPW, the AD7715AR-5REEL offers the lowest system-level component count for single-channel 16-bit transducer digitization due to its integrated buffer, simple three-wire interface, and minimal external support requirements-making it ideal for compact, low-power industrial sensor nodes where 16-bit fidelity suffices.
Availability
AD7715AR-5REEL is available at Aetrix Electronics and suitable for pressure transducers, RTD temperature sensors, smart 4–20 mA transmitters, and industrial weigh scale systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7715AR-5REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7715AR-5REEL belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for low-frequency, high-accuracy measurement of millivolt-level transducer outputs in harsh industrial environments.
FAQ
What is the operating supply voltage range for the AD7715AR-5REEL?
The AD7715AR-5REEL is specified for AVDD = 4.75 V to 5.25 V and DVDD = 3 V to 5.25 V. It is a 5 V–optimized variant of the AD7715 family, distinct from the 3 V–optimized AD7715-3. Operation outside these ranges may result in degraded performance or functional failure, per Absolute Maximum Ratings in the Rev. E datasheet.
Does the AD7715AR-5REEL support differential reference inputs?
Yes, the AD7715AR-5REEL requires a differential reference voltage applied between REF IN(+) and REF IN(−), with a nominal value of 2.5 V for the -5 variant. This differential reference architecture enables ratiometric accuracy and high common-mode rejection, critical for stable measurements in electrically noisy industrial settings.
Can the AD7715AR-5REEL interface directly with a microcontroller's SPI port?
Yes, the AD7715AR-5REEL features a three-wire serial interface fully compatible with SPI, QSPI, MICROWIRE, and DSP protocols. It uses SCLK, DIN, DOUT, and CS signals-no additional level-shifting or protocol translation is needed when interfacing with standard 3.3 V or 5 V microcontrollers.
What calibration capabilities does the AD7715AR-5REEL provide?
The AD7715AR-5REEL supports on-chip self-calibration (zero- and full-scale) and system calibration (zero- and full-scale). These functions eliminate gain and offset errors introduced by the ADC itself or external circuitry, with drift compensation down to 0.5 µV/°C after recalibration at temperature.
Is the AD7715AR-5REEL pin-compatible with other AD7715 variants?
Yes, the AD7715AR-5REEL shares identical pinout and package (16-lead SOIC_W) with AD7715AR-3, AD7715BN, and all other AD7715 variants. Differences lie solely in supply voltage specification (5 V vs. 3 V), reference voltage (2.5 V vs. 1.25 V), and associated performance parameters-not physical layout or interface behavior.
AD7715AR-5REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 3V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7715AR-5REEL FAQ
1.How can I place an order for AD7715AR-5REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715AR-5REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7715AR-5REEL reliable?
The price and inventory of AD7715AR-5REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715AR-5REEL is usually 5 days.
3.What payment methods are accepted for AD7715AR-5REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715AR-5REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715AR-5REEL?
AD7715AR-5REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715AR-5REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7715AR-5REEL?
For technical support, including AD7715AR-5REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715AR-5REEL requirements.
6.How does Aetrix verify that AD7715AR-5REEL is sourced from the original manufacturer or authorized distributors?
All AD7715AR-5REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7715AR-5REEL meets industry standards.
7.What is the process for return or replacement of AD7715AR-5REEL?
All AD7715AR-5REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7715AR-5REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7715AR-5REEL part is unused and in its original packaging.
Return procedure for AD7715AR-5REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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