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Analog Devices Inc. AD7715ARZ-5
- Part No.:
- AD7715ARZ-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7715ARZ-5.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:221
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Product details
Overview
AD7715ARZ-5 from Analog Devices is a 16-bit sigma-delta analog-to-digital converter (ADC) optimized for low-frequency precision measurement. It integrates a programmable-gain amplifier (gain 1/2/32/128), differential analog input, differential reference input, on-chip digital filter with programmable notch, and SPI-/QSPI-/MICROWIRE-compatible three-wire serial interface. It operates from a 5 V analog supply (AVDD = 4.75–5.25 V) and supports unipolar/bipolar input ranges up to ±2.5 V, targeting strain gauge and sensor front-end applications.
For engineers reviewing the AD7715ARZ-5 datasheet, AD7715ARZ-5 pinout, AD7715ARZ-5 application, or AD7715ARZ-5 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, ±0.0015% integral nonlinearity at ≤60 Hz filter notch, 98 dB normal-mode 50/60 Hz rejection, 450 µA max supply current at 3 V (AD7715-3 variant), and 5 V operation capability with 0.27 mA typical AVDD current at 1 MHz clock.
Technical Context
The AD7715ARZ-5 employs charge-balancing sigma-delta modulation with an on-chip digital filter whose first notch frequency is software-programmable via control registers, enabling adjustable output update rates and line-frequency rejection. Its analog front end includes a PGA with four discrete gain settings and configurable input buffering (BUF bit).
It features dual-supply operation (AVDD = 4.75–5.25 V, DVDD = 3–5.25 V), differential AIN(+) and AIN(−) inputs referenced to AGND, and differential REF IN(+) and REF IN(−) inputs supporting 2.5 V nominal reference voltage. Calibration modes include self-calibration and system calibration to eliminate zero-scale and full-scale errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes guaranteed by design (filter notch ≤ 60 Hz) |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high-accuracy digitization in precision sensor systems |
| Normal-Mode Rejection | 98 dB at 50 Hz and 60 Hz - enables robust operation in electrically noisy industrial environments |
| Supply Current (AVDD) | 0.27 mA typical at 1 MHz clock, gain = 1–128 - supports low-power embedded designs |
| Input Voltage Ranges | Unipolar: 0 mV to 20 mV, 0 V to 2.5 V; bipolar: ±20 mV, ±2.5 V - accommodates direct transducer interfacing |
| Reference Input | 2.5 V nominal (REF IN(+) − REF IN(−)), ±1% for specified performance - defines full-scale range accuracy |
| Digital Interface | Three-wire SPI-/QSPI-/MICROWIRE-/DSP-compatible serial port - reduces MCU pin count and isolation complexity |
Pinout & Package
AD7715ARZ-5 is housed in a 16-lead, 0.3-inch-wide SOIC_W (Small Outline Integrated Circuit, Wide-body) package with standard JEDEC MS-013AC footprint and 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial Clock Input | Controls timing of serial data transfers; accepts continuous or burst-mode clocks compatible with SPI/QSPI/MICROWIRE protocols |
| MCLK IN | Master Clock Input | Drives internal sigma-delta modulator and digital filter; supports 400 kHz–2.5 MHz external CMOS clock or crystal/resonator connection |
| MCLK OUT | Master Clock Output | Provides buffered clock output when crystal/resonator is connected across MCLK IN/OUT; drives one CMOS load |
| CS | Chip Select Input | Active-low enable for serial interface; initiates communication and controls register access timing |
| DIN | Serial Data Input | Accepts configuration commands (setup, communications, test registers) and calibration instructions |
| DOUT | Serial Data Output | Transmits conversion results and status bits; synchronized to SCLK falling edge |
| DRDY | Data Ready Output | Active-low open-drain signal indicating valid conversion data is available in the data register |
| RESET | Hardware Reset Input | Asynchronous active-low reset that clears internal registers and forces power-on initialization sequence |
| AIN(+), AIN(−) | Differential Analog Inputs | Accept low-level transducer signals; support buffered/unbuffered modes and bipolar/unipolar configurations |
| REF IN(+), REF IN(−) | Differential Reference Inputs | Define ADC full-scale range; require 2.5 V nominal differential voltage for AD7715ARZ-5; reject common-mode noise |
| AVDD | Analog Supply Voltage | +4.75 V to +5.25 V supply for analog circuitry including PGA, modulator, and reference buffer |
| DVDD | Digital Supply Voltage | +3 V to +5.25 V supply for digital logic, serial interface, and register bank |
| AGND, DGND | Analog/Digital Ground | Separate ground pins minimize digital switching noise coupling into analog signal path |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier | Gains of 1, 2, 32, and 128 eliminate external signal conditioning for strain gauges and RTDs |
| Configurable Digital Filter | First-notch frequency programmable via register to set output update rate and optimize 50/60 Hz line rejection |
| On-Chip Calibration | Self-calibration and system calibration remove offset/gain errors without external components or manual trimming |
| Low-Power Operation | 450 µA max total supply current at 3 V (AD7715-3); standby current as low as 10 µA enables battery-powered use |
| Differential Input Architecture | 90 dB DC common-mode rejection and >150 dB common-mode 50/60 Hz rejection suppress noise in industrial sensors |
Applications
| Pressure Measurement | Temperature Sensing |
|---|---|
|
Use Scenario: High-accuracy pressure transducers in HVAC and process control systems requiring stable 16-bit resolution over temperature. IC Role / Device Role / Timing Role: Precision analog front end performing PGA amplification, sigma-delta conversion, and digital filtering of millivolt-level bridge outputs. Use Value: Eliminates external op-amps and instrumentation amps; ±0.0015% INL and <550 nV rms noise ensure sub-0.1% pressure reading accuracy. |
Use Scenario: RTD-based temperature monitoring in industrial PLCs where 4-wire resistance measurements must reject EMI and thermal drift. IC Role / Device Role / Timing Role: Differential ADC with programmable gain and 2.5 V reference handling ratiometric RTD excitation and linearization. Use Value: 98 dB normal-mode 50/60 Hz rejection and on-chip calibration reduce system-level error compensation effort by >70%. |
| Smart Transmitters | Load Cell Interfaces |
|
Use Scenario: 4–20 mA loop-powered field instruments needing low quiescent current and integrated diagnostics. IC Role / Device Role / Timing Role: Low-power ADC with three-wire serial interface and DRDY signaling for microcontroller co-processing in isolated loop designs. Use Value: 0.27 mA AVDD current at 1 MHz clock and SPI compatibility reduce optocoupler count and PCB area vs. parallel-interface alternatives. |
Use Scenario: Weighing scales using full-bridge load cells with mV/V output requiring high gain, low noise, and zero-drift stability. IC Role / Device Role / Timing Role: Charge-balancing sigma-delta converter with 128× PGA gain and bipolar ±20 mV input range directly digitizing bridge outputs. Use Value: Guaranteed 16-bit no-missing-codes and 0.5 µV/°C bipolar zero drift enable 1:100,000 dynamic range without recalibration. |
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 |
|---|---|---|---|
| AD7714ARZ-5 | 24-bit resolution, same 16-pin SOIC package, identical pinout and serial interface, but higher power (1.2 mA typical AVDD current) | Targeted at ultra-high-resolution applications (e.g., laboratory instrumentation) where 16-bit is insufficient | Select AD7714ARZ-5 only if 24-bit resolution and lower noise (<100 nV rms) are required; AD7715ARZ-5 offers better power efficiency for 16-bit needs |
| ADS124S08IPW | 24-bit delta-sigma ADC with integrated PGA, reference, and burn-out current sources; 20-pin TSSOP; SPI interface | Designed for sensor signal chains requiring on-chip excitation and diagnostics (e.g., thermocouple cold-junction compensation) | Choose ADS124S08IPW when integrated excitation, reference, and diagnostics are needed; AD7715ARZ-5 provides simpler, lower-cost solution for basic transducer digitization |
Compared with AD7714ARZ-5 and ADS124S08IPW, the AD7715ARZ-5 delivers optimal balance of 16-bit precision, ultra-low power, and minimal external component count for cost-sensitive industrial sensor interfaces - without sacrificing line-frequency rejection or calibration flexibility.
Availability
AD7715ARZ-5 is available at Aetrix Electronics and suitable for pressure measurement, temperature sensing, smart transmitter development, and load cell interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7715ARZ-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 AD7715ARZ-5 belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for low-frequency industrial and scientific measurement systems requiring high resolution, excellent line-rejection, and integrated signal conditioning.
FAQ
What is the maximum master clock frequency supported by the AD7715ARZ-5?
The AD7715ARZ-5 supports a master clock frequency up to 2.5 MHz for specified performance, with production testing conducted at 2.4576 MHz. It is guaranteed by characterization to operate down to 400 kHz. Operation outside this range may compromise accuracy, update rate, or power consumption - always verify timing compliance per Table 4 in the Rev. E datasheet when selecting clock sources for the AD7715ARZ-5.
Does the AD7715ARZ-5 support both unipolar and bipolar input configurations?
Yes, the AD7715ARZ-5 supports both unipolar (e.g., 0 mV to 20 mV, 0 V to 2.5 V) and bipolar (e.g., ±20 mV, ±2.5 V) input ranges. Configuration is controlled by the B/U bit in the setup register. Bipolar ranges are referenced to AIN(−), and the device maintains ±0.0015% integral nonlinearity in both modes when the digital filter notch is ≤60 Hz - a key specification confirmed for the AD7715ARZ-5 in Table 1 of the Rev. E datasheet.
How does the AD7715ARZ-5 handle power supply rejection at line frequencies?
The AD7715ARZ-5 achieves >120 dB power supply rejection ratio (PSRR) at 50 Hz and 60 Hz when configured with appropriate digital filter notches (25 Hz/50 Hz or 20 Hz/60 Hz). This PSRR performance is independent of gain setting and complements its 98 dB normal-mode rejection, making the AD7715ARZ-5 highly resilient to AC mains interference in industrial environments - a verified characteristic documented in the "Power Supply Rejection" section of the Rev. E datasheet.
Can the AD7715ARZ-5 operate with a 3 V analog supply?
No - the AD7715ARZ-5 is the 5 V variant and requires AVDD between 4.75 V and 5.25 V for specified performance. The 3 V variant is designated AD7715ARZ-3 (AVDD = 3 V to 3.6 V). Using 3 V on the AD7715ARZ-5 violates absolute maximum ratings and will result in undefined operation or damage. Always match the suffix (-5 or -3) to the intended supply voltage when ordering the AD7715ARZ-5.
What calibration options are available on the AD7715ARZ-5?
The AD7715ARZ-5 provides two calibration modes: self-calibration (zero- and full-scale calibration using internal references) and system calibration (zero- and full-scale calibration using external applied signals). Both modes eliminate gain and offset errors without external components. System calibration corrects for errors introduced by external circuitry such as sensor bridges or filters - a capability explicitly defined for the AD7715ARZ-5 in the "Calibration Sequences" section of the Rev. E datasheet.
AD7715ARZ-5 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:
- 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:
- -
AD7715ARZ-5 FAQ
1.How can I place an order for AD7715ARZ-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715ARZ-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 AD7715ARZ-5 reliable?
The price and inventory of AD7715ARZ-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715ARZ-5 is usually 5 days.
3.What payment methods are accepted for AD7715ARZ-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715ARZ-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715ARZ-5?
AD7715ARZ-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715ARZ-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 AD7715ARZ-5?
For technical support, including AD7715ARZ-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715ARZ-5 requirements.
6.How does Aetrix verify that AD7715ARZ-5 is sourced from the original manufacturer or authorized distributors?
All AD7715ARZ-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 AD7715ARZ-5 meets industry standards.
7.What is the process for return or replacement of AD7715ARZ-5?
All AD7715ARZ-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7715ARZ-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 AD7715ARZ-5 part is unused and in its original packaging.
Return procedure for AD7715ARZ-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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