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Analog Devices Inc. AD7715ANZ-5
- Part No.:
- AD7715ANZ-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7715ANZ-5.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
AD7715ANZ-5 from Analog Devices is a 16-bit sigma-delta analog-to-digital converter optimized for low-frequency precision measurement. It integrates a programmable-gain amplifier (gains 1/2/32/128), differential analog and reference inputs, on-chip digital filtering, and a three-wire SPI-compatible serial interface. It operates from a 5 V analog supply (AVDD = 4.75–5.25 V), delivers ±0.0015% integral nonlinearity, and supports unipolar/bipolar input ranges up to ±2.5 V - ideal for strain gauge and RTD-based sensor front ends in industrial process control.
For engineers reviewing the AD7715ANZ-5 datasheet, AD7715ANZ-5 pinout, AD7715ANZ-5 application, or AD7715ANZ-5 equivalent, key selection criteria include its 16-bit no-missing-codes performance, 50 Hz/60 Hz notch filter rejection (>98 dB normal-mode, >150 dB common-mode), 450 µA max supply current at 3 V (or 1.1 mA typical at 5 V with buffer enabled), and PDIP-16 package compatibility with legacy board layouts.
Technical Context
The AD7715ANZ-5 employs a charge-balancing sigma-delta modulator followed by a programmable digital filter whose first notch frequency determines output update rate and line frequency rejection. Its analog front end includes a rail-to-rail input PGA and optional input buffer, enabling direct connection to low-level transducer outputs without external signal conditioning.
It uses a single master clock (1–2.4576 MHz) to derive internal timing, supports self-calibration and system calibration to eliminate offset/gain drift (0.5 µV/°C unipolar offset drift), and features dual power domains (AVDD/DVDD) with independent ground pins (AGND/DGND) to minimize noise coupling between analog and digital sections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit no missing codes - guarantees monotonicity and full code coverage across all operating conditions. |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high-accuracy measurement over full scale without correction tables. |
| Normal-Mode Rejection | 98 dB at 50/60 Hz - eliminates mains interference in industrial environments without external filtering. |
| Common-Mode Rejection | 150 dB at 50/60 Hz - rejects shared-noise coupling in differential sensor configurations. |
| Supply Current | 1.1 mA typical (AVDD = 5 V, BUF = 1, gain = 32/128, fCLK = 2.4576 MHz) - enables low-power operation while maintaining high resolution. |
| Input Voltage Ranges | ±2.5 V bipolar or 0–2.5 V unipolar (with 2.5 V reference) - matches standard industrial sensor outputs and reference sources. |
| Update Rate | Programmable via digital filter notch - selectable from ~10 Hz to 1 kHz depending on gain and clock frequency. |
Pinout & Package
AD7715ANZ-5 is housed in a 16-lead plastic dual-in-line package (PDIP), 0.3 inch wide, with through-hole mounting and industry-standard footprint. Pin 1 is SCLK; pin 16 is REF IN(–); pin 9 is REF IN(+); pin 14 is AIN(+); pin 15 is AIN(–); pin 13 is DGND; pin 11 is AGND; pin 12 is DRDY; pin 10 is RESET; pin 8 is CS; pin 7 is MCLK OUT; pin 6 is MCLK IN; pin 5 is DVDD; pin 4 is AVDD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Controls timing of data transfer on DIN/DOUT; compatible with SPI/QSPI/MICROWIRE protocols. |
| DIN | Serial data input | Accepts configuration commands (setup, communications, test registers) and calibration triggers. |
| DOUT | Serial data output | Delivers converted 16-bit data and status bits; tri-state when CS is high. |
| DRDY | Data ready indicator | Active-low open-drain output signals valid conversion result; synchronizes host read timing. |
| CS | Chip select | Enables serial interface; must be low during all communication cycles. |
| AIN(+), AIN(–) | Differential analog input | Accepts low-level sensor signals; supports buffered/unbuffered modes and bipolar/unipolar ranges. |
| REF IN(+), REF IN(–) | Differential reference input | Defines full-scale range; requires 2.5 V nominal difference for AD7715ANZ-5; rejects common-mode noise. |
| AVDD, AGND | Analog power domain | Supplies analog circuitry including PGA, modulator, and reference buffer; isolated from digital ground. |
| DVDD, DGND | Digital power domain | Powers serial interface and digital filter; separate supply improves noise immunity and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain amplifier | Gains of 1, 2, 32, or 128 eliminate need for external amplification stages when interfacing mV-level sensors like strain gauges. |
| Differential input architecture | Rejects common-mode noise and ground loop errors in long cable runs typical of industrial field instrumentation. |
| On-chip digital filter with programmable notch | Enables precise 50 Hz or 60 Hz line frequency rejection without external components or firmware post-processing. |
| Self- and system-calibration capability | Removes zero-scale and full-scale errors in situ - critical for maintaining accuracy across temperature and aging in unattended systems. |
| Three-wire serial interface | Reduces interconnect count and optocoupler requirements in isolated systems, simplifying galvanic separation design. |
Applications
| Pressure Measurement | Temperature Monitoring |
|---|---|
Use Scenario: High-accuracy pressure transducers in HVAC or process control systems require stable digitization of millivolt-level bridge outputs under noisy plant-floor conditions. IC Role / Device Role / Timing Role: ADC front end performing PGA gain scaling, sigma-delta conversion, and digital filtering - replaces discrete op-amp + filter + ADC chain. Use Value: 16-bit resolution and 150 dB common-mode rejection enable direct digitization of bridge signals without external amplification or shielding. | Use Scenario: RTD-based temperature sensing in industrial ovens or chemical reactors demands stable, low-drift conversion over −40°C to +85°C. IC Role / Device Role / Timing Role: Precision ADC with integrated reference buffer and self-calibration - handles ratiometric RTD measurements using 2.5 V reference. Use Value: 0.5 µV/°C unipolar offset drift and on-chip calibration maintain ±0.1°C accuracy without periodic recalibration. |
| Smart Transmitter | Load Cell Interface |
Use Scenario: 4–20 mA smart transmitters integrate microcontrollers and analog sensing; space-constrained PCBs require minimal external components. IC Role / Device Role / Timing Role: Single-chip analog front end providing sensor excitation, signal conditioning, and digital output - interfaces directly to MCU UART or SPI bus. Use Value: Three-wire serial interface and software-configurable gain/update rate reduce BOM count and firmware complexity. | Use Scenario: Weighing scales use full-bridge load cells generating ±20 mV outputs; high-resolution weight calculation requires low-noise, high-PSRR conversion. IC Role / Device Role / Timing Role: Low-noise sigma-delta ADC with 128× gain and 50/60 Hz notch filtering - digitizes microvolt-level differential signals. Use Value: 98 dB normal-mode rejection and <550 nV rms noise ensure sub-gram resolution in 10 kg–100 kg industrial scales. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7714ANZ-5 | 5-channel version with identical 16-bit sigma-delta core, same pinout, but higher supply current (1.3 mA typ) and no buffer option. | Multi-sensor systems requiring simultaneous sampling of multiple transducers; not suitable for space-constrained single-channel designs. | Select AD7714ANZ-5 only when multi-input capability justifies added cost and layout area. |
| ADS1220IPWR | TI's 24-bit delta-sigma ADC with PGA (1–128), built-in voltage reference, and enhanced ESD protection (±4 kV HBM), but requires external crystal and lacks self-calibration. | Higher-resolution applications where 24-bit output and integrated reference simplify design, but demand more complex calibration routines. | Choose ADS1220IPWR when absolute resolution >16-bit is required and system firmware can manage external calibration. |
Compared with AD7715ANZ-5, AD7714ANZ-5 offers channel expansion at the cost of higher quiescent current and reduced flexibility in single-ended configurations, while ADS1220IPWR trades proven industrial robustness and embedded calibration for higher resolution and tighter integration - making AD7715ANZ-5 optimal for cost-sensitive, single-channel, maintenance-free industrial measurement.
Availability
AD7715ANZ-5 is available at Aetrix Electronics and suitable for pressure measurement, temperature monitoring, smart transmitter development, and load cell interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for AD7715ANZ-5 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 AD7715 belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for low-frequency industrial measurement applications where resolution, noise immunity, and calibration stability outweigh speed requirements.
FAQ
What is the maximum recommended master clock frequency for AD7715ANZ-5?
The AD7715ANZ-5 is production-tested at 2.4576 MHz and guaranteed by characterization to operate up to 2.5 MHz. Operation above this frequency may compromise timing margins and conversion accuracy. For optimal noise performance and 50/60 Hz rejection, 2.4576 MHz is the preferred clock frequency - it enables exact integer division for clean notch placement. The device also supports lower frequencies down to 400 kHz for ultra-low-power applications.
Does AD7715ANZ-5 support both unipolar and bipolar input configurations?
Yes, AD7715ANZ-5 supports both unipolar (0 mV to 20 mV, 0 V to 2.5 V) and bipolar (±20 mV, ±2.5 V) input ranges via the B/U bit in the setup register. Bipolar mode references the negative input (AIN(–)) as zero, allowing true differential measurement of AC-coupled or centered DC signals. The 2.5 V reference voltage (REF IN(+)-REF IN(–)) sets full-scale range, and gain selection (1/2/32/128) scales input sensitivity accordingly.
How does the AD7715ANZ-5 handle power supply rejection in noisy industrial environments?
AD7715ANZ-5 achieves >120 dB PSRR at 50/60 Hz when configured with appropriate filter notches (25 Hz/20 Hz), and maintains 85–95 dB PSRR across dc to 1 kHz depending on PGA gain setting. Its dual-supply architecture (separate AVDD/DVDD and AGND/DGND) isolates analog and digital noise paths. Combined with differential input and reference structures, this enables reliable operation in PLC backplanes and motor-drive proximity without external LDOs or ferrite beads.
Can AD7715ANZ-5 perform calibration without external equipment?
Yes, AD7715ANZ-5 includes on-chip self-calibration (zero and full-scale) and system calibration modes that require only shorting AIN(+) to AIN(–) or applying known reference voltages - no external precision sources or test instruments needed. Calibration coefficients are stored internally and applied automatically to subsequent conversions. This capability ensures long-term accuracy in field-deployed systems where access for recalibration is impractical.
Is the AD7715ANZ-5 pin-compatible with other variants in the AD7715 family?
Yes, AD7715ANZ-5 shares identical pinout and package (16-lead PDIP) with AD7715ANZ-3 and AD7715BN models. Electrical differences are limited to supply voltage ranges (5 V vs. 3 V operation), reference voltage (2.5 V vs. 1.25 V), and typical supply current - all functionally transparent to PCB layout. Firmware configuration (gain, update rate, polarity) remains fully interchangeable across variants, enabling single-hardware designs with software-selectable performance tiers.
AD7715ANZ-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- 5V
- Voltage - Supply, Digital:
- 3V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7715ANZ-5 FAQ
1.How can I place an order for AD7715ANZ-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715ANZ-5 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 AD7715ANZ-5 reliable?
The price and inventory of AD7715ANZ-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715ANZ-5 is usually 5 days.
3.What payment methods are accepted for AD7715ANZ-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715ANZ-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715ANZ-5?
AD7715ANZ-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715ANZ-5 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 AD7715ANZ-5?
For technical support, including AD7715ANZ-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715ANZ-5 requirements.
6.How does Aetrix verify that AD7715ANZ-5 is sourced from the original manufacturer or authorized distributors?
All AD7715ANZ-5 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 AD7715ANZ-5 meets industry standards.
7.What is the process for return or replacement of AD7715ANZ-5?
All AD7715ANZ-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7715ANZ-5, 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 AD7715ANZ-5 part is unused and in its original packaging.
Return procedure for AD7715ANZ-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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