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Analog Devices Inc. AD7715ARZ-3
- Part No.:
- AD7715ARZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7715ARZ-3.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,708
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Product details
Overview
AD7715ARZ-3 from Analog Devices is a 16-bit sigma-delta analog-to-digital converter optimized for low-frequency, high-precision transducer interfacing. It features a programmable gain amplifier (gains of 1, 2, 32, 128), differential analog and reference inputs, 3 V single-supply operation, and 450 µA maximum supply current. It delivers 16-bit no-missing-codes performance with ±0.0015% integral nonlinearity and supports unipolar/bipolar input ranges including ±20 mV and ±1.25 V - ideal for strain gauge and RTD-based measurement systems.
For engineers reviewing the AD7715ARZ-3 datasheet, AD7715ARZ-3 pinout, AD7715ARZ-3 application, or AD7715ARZ-3 equivalent, key selection criteria include its 3 V supply compatibility, on-chip self/system calibration, 3-wire SPI-compatible serial interface, programmable digital filter notch (20–60 Hz), and low 0.2 µV/°C bipolar zero drift - all critical for battery-powered industrial sensors and smart transmitter designs.
Technical Context
The AD7715ARZ-3 employs a charge-balancing sigma-delta modulator with on-chip digital filtering, where the first notch frequency is software-programmable to match line-frequency rejection requirements (e.g., 50 Hz or 60 Hz). Its analog front end integrates a buffered or unbuffered differential PGA, enabling direct connection to low-level transducer outputs without external signal conditioning.
It operates with a 1 MHz or 2.4576 MHz master clock, supports three-wire serial communication (SPI/QSPI/MICROWIRE/DSP-compatible), and includes dedicated registers for gain, polarity, update rate, and calibration control. Standby mode reduces current to 10 µA typical, and internal calibration eliminates system-level offset and full-scale errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit no missing codes - guarantees monotonicity and full code coverage across full temperature range (−40°C to +85°C). |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high accuracy in precision weighing and process control applications. |
| Supply Voltage | 3 V AVDD/DVDD - enables direct integration into 3 V microcontroller-based sensor nodes without level-shifting. |
| Supply Current | 450 µA max @ 3 V, 1 MHz MCLK - supports ultra-low-power operation in battery-powered field instruments. |
| Input Ranges | ±20 mV, ±80 mV, ±1.25 V, ±2.5 V (bipolar); 0–20 mV, 0–80 mV, 0–1.25 V, 0–2.5 V (unipolar) - configurable via PGA gain and B/U bit. |
| Common-Mode Rejection | 90 dB (dc), 150 dB at 50/60 Hz - suppresses noise from shared ground or long cable runs in industrial environments. |
| Filter Notch Frequency | Programmable 20 Hz to 60 Hz - enables precise rejection of power-line interference without external components. |
Pinout & Package
AD7715ARZ-3 is housed in a 16-lead SOIC_W (0.3 inch wide) package, RoHS-compliant and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCLK) | Serial Clock Input | Controls timing of data transfer on DIN/DOUT; compatible with SPI, QSPI, MICROWIRE, and DSP interfaces. |
| 2 (MCLK IN) | Master Clock Input | Accepts 400 kHz–2.4576 MHz external clock or crystal; required for ADC conversion and digital filter operation. |
| 3 (MCLK OUT) | Master Clock Output | Drives crystal/resonator when used in oscillator configuration; left open if external clock applied to MCLK IN. |
| 4 (CS) | Chip Select Input | Active-low enable for serial interface; allows multiple devices on shared SCLK/DIN/DOUT bus. |
| 5 (REF IN(+)) | Positive Reference Input | Accepts 1.25 V nominal reference for AD7715ARZ-3; sets full-scale range in conjunction with REF IN(−). |
| 6 (AGND) | Analog Ground | Separate ground return for analog circuitry; must be isolated from DGND at single point to minimize noise coupling. |
| 7 (DRDY) | Data Ready Output | Active-low flag indicating valid conversion result is available in data register for readout. |
| 8 (RESET) | Hardware Reset Input | Asynchronous active-low reset that clears internal registers and initiates power-on reset sequence. |
| 9 (AVDD) | Analog Supply Voltage | 3 V supply for analog section (PGA, modulator, reference buffer); must be filtered and decoupled per layout guidelines. |
| 10 (AIN(+)) | Differential Analog Input (+) | High-side input for differential measurement; supports buffered/unbuffered modes via setup register. |
| 11 (AIN(−)) | Differential Analog Input (−) | Low-side input referenced to AGND; defines common-mode voltage and input range with AIN(+). |
| 12 (REF IN(−)) | Negative Reference Input | Ground reference for 1.25 V reference; tied to AGND in standard configurations. |
| 13 (DGND) | Digital Ground | Ground return for digital I/O and logic; connected to AGND at single point near AVDD/DVDD decoupling. |
| 14 (DVDD) | Digital Supply Voltage | 3 V supply for serial interface and digital logic; may share rail with AVDD if noise isolation is maintained. |
| 15 (DIN) | Serial Data Input | Writes configuration data (setup, communications, test registers) and initiates calibration sequences. |
| 16 (DOUT) | Serial Data Output | Reads conversion results, status bits, and register contents; tri-state when CS is high. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier | Gains of 1, 2, 32, 128 eliminate need for external op-amp stages when interfacing millivolt-level transducers. |
| On-Chip Self-Calibration | Removes internal offset and gain errors without external calibration hardware or user intervention. |
| System Calibration Support | Enables removal of sensor and PCB-level offset/gain errors using known reference inputs at system level. |
| Low-Power Standby Mode | Reduces supply current to 10 µA typical, preserving battery life during idle periods in portable instrumentation. |
| Differential Input & Reference | Rejects common-mode noise and eliminates ground loop errors in noisy industrial environments. |
Applications
| Pressure Measurement | Temperature Monitoring |
|---|---|
|
Use Scenario: High-resolution pressure sensing in HVAC controllers and industrial process transmitters using silicon piezoresistive bridges. IC Role / Device Role / Timing Role: Front-end ADC digitizing mV-level bridge output with integrated PGA and line-frequency rejection filtering. Use Value: Eliminates external amplification and anti-aliasing filters while achieving <550 nV rms noise and ±0.0015% INL for sub-0.1% total error. |
Use Scenario: Precision RTD or thermocouple measurement in building automation and environmental monitoring nodes. IC Role / Device Role / Timing Role: Direct digitization of low-level thermal sensor outputs with programmable gain and bipolar input support. Use Value: Enables 0.1°C resolution over −40°C to +125°C range using on-chip calibration and 1.25 V reference, reducing BOM count by 3+ components. |
| Smart Transmitters | Portable Weigh Scales |
|
Use Scenario: 4–20 mA loop-powered field transmitters requiring low power, high accuracy, and HART protocol compatibility. IC Role / Device Role / Timing Role: Primary ADC handling sensor signal conditioning, digital filtering, and serial data output to microcontroller. Use Value: 450 µA supply current and 3 V operation allow full functionality within 3.5 mA loop budget; DRDY simplifies interrupt-driven firmware design. |
Use Scenario: Battery-operated handheld scales using load cells with ±20 mV full-scale output. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC with integrated PGA and zero/full-scale calibration for factory and field recalibration. Use Value: 0.2 µV/°C bipolar zero drift and self-calibration ensure stable readings across ambient temperature swings without mechanical recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7714ARZ | 16-bit, 5-channel multiplexed input; lacks programmable filter notch; higher 600 µA supply current at 3 V. | Designed for multi-sensor systems; not optimal for single-channel low-power transducer interfaces. | Choose AD7715ARZ-3 for lower power, programmable line-rejection, and simpler single-input architecture. |
| ADS124S08IPW | 24-bit resolution, integrated PGA and burnout current sources; requires 5 V supply or LDO; 350 µA typical current. | Targets higher-precision applications (e.g., medical diagnostics); incompatible pinout and register map. | Choose AD7715ARZ-3 when 16-bit resolution suffices, 3 V native operation is mandatory, and legacy design reuse is needed. |
Compared with AD7714ARZ and ADS124S08IPW, the AD7715ARZ-3 offers the lowest power consumption at 3 V, dedicated line-frequency notch programming, and proven field reliability in loop-powered transmitters - making it the optimal choice for cost-sensitive, single-channel industrial sensor nodes.
Availability
AD7715ARZ-3 is available at Aetrix Electronics and suitable for pressure transmitters, portable weigh scales, smart sensor modules, and industrial RTD measurement systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for AD7715ARZ-3 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.
The AD7715ARZ-3 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for low-frequency, high-accuracy industrial measurement applications where transducer interface simplicity, low power, and robust noise immunity are essential.
FAQ
What is the operating voltage range for AD7715ARZ-3?
The AD7715ARZ-3 operates with AVDD and DVDD supplied at 3 V nominal (3.0 V to 3.6 V for specified performance). It is not rated for 5 V operation - that applies only to the AD7715-5 variant. The 1.25 V reference input (REF IN(+)) must be stable and accurate to maintain full 16-bit linearity and ±0.0015% INL performance.
Does AD7715ARZ-3 support both unipolar and bipolar input configurations?
Yes, the AD7715ARZ-3 supports both unipolar (0 mV to 20 mV, 0 V to 1.25 V) and bipolar (±20 mV, ±1.25 V) input ranges. Configuration is controlled by the B/U bit in the setup register and the selected PGA gain. Bipolar mode uses offset binary coding, while unipolar mode uses straight binary - both are handled automatically by the device's digital interface.
How does the programmable digital filter work in AD7715ARZ-3?
The AD7715ARZ-3 implements a programmable first-notch digital filter whose cutoff frequency can be set to 20 Hz, 25 Hz, 50 Hz, or 60 Hz via the on-chip control register. This enables precise rejection of power-line interference without external analog filters. Filter configuration directly affects output update rate and effective resolution - e.g., 50 Hz notch yields ~20 samples/sec at 16-bit no-missing-codes performance.
Can AD7715ARZ-3 perform system-level calibration?
Yes, the AD7715ARZ-3 supports both self-calibration (removing internal offset/gain errors) and system calibration (removing errors introduced by external circuitry such as sensor excitation and signal conditioning). System calibration requires applying known zero- and full-scale analog inputs to AIN(+) and AIN(−), then executing dedicated calibration commands via the serial interface.
What package type is used for AD7715ARZ-3?
The AD7715ARZ-3 is supplied in a 16-lead SOIC_W (wide-body small outline integrated circuit) package, 0.3 inch wide, with standard 1.27 mm pitch. It is RoHS-compliant, rated for −40°C to +85°C operation, and pin-compatible with the PDIP and TSSOP variants of the same part number family - though thermal and layout considerations differ between packages.
AD7715ARZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 3V ~ 3.6V
- 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:
- -
AD7715ARZ-3 FAQ
1.How can I place an order for AD7715ARZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715ARZ-3 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 AD7715ARZ-3 reliable?
The price and inventory of AD7715ARZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715ARZ-3 is usually 5 days.
3.What payment methods are accepted for AD7715ARZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715ARZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715ARZ-3?
AD7715ARZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715ARZ-3 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 AD7715ARZ-3?
For technical support, including AD7715ARZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715ARZ-3 requirements.
6.How does Aetrix verify that AD7715ARZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7715ARZ-3 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 AD7715ARZ-3 meets industry standards.
7.What is the process for return or replacement of AD7715ARZ-3?
All AD7715ARZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7715ARZ-3, 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 AD7715ARZ-3 part is unused and in its original packaging.
Return procedure for AD7715ARZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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