My Inquiry
My Account
Analog Devices Inc. AD7715ARU-5
- Part No.:
- AD7715ARU-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7715ARU-5.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7715ARU-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 (PGA) with gains of 1, 2, 32, and 128; differential analog and reference inputs; and a three-wire SPI-compatible serial interface. Operating at 5 V AVDD with 450 µA total supply current, it delivers 16-bit no-missing-codes performance and ±0.0015% integral nonlinearity - ideal for high-accuracy sensor signal conditioning in industrial transmitters.
For engineers reviewing the AD7715ARU-5 datasheet, AD7715ARU-5 pinout, AD7715ARU-5 application, or AD7715ARU-5 equivalent, key selection considerations include its 5 V operation mode, differential input capability, programmable digital filter notch (20 Hz to 60 Hz), on-chip self/system calibration, and TSSOP-16 package compatibility with isolated microcontroller interfaces.
Technical Context
The AD7715ARU-5 employs a charge-balancing sigma-delta modulator with on-chip digital filtering, where the first notch frequency is software-programmable to set output update rate and 50/60 Hz rejection. Its PGA front end enables direct connection to low-level transducers such as strain gauges without external amplification.
It supports unipolar (0 mV to 2.5 V) and bipolar (±2.5 V) input ranges referenced to AGND, with 98 dB normal-mode and 150 dB common-mode 50/60 Hz rejection when configured with appropriate filter notches. The device features dual power domains (AVDD/DVDD), buffer enable control, and system-level calibration sequences that eliminate zero-scale and full-scale errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across all operating conditions. |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high-end accuracy for calibrated industrial measurements. |
| Supply Voltage | 5 V AVDD (4.75–5.25 V), 3–5.25 V DVDD - defines the AD7715ARU-5 variant's 5 V analog rail operation. |
| Total Supply Current | 450 µA max @ 3 V supplies; 0.27–1.1 mA @ 5 V AVDD - enables low-power operation while supporting high-gain, high-clock-rate modes. |
| Input Configuration | Differential AIN(+) / AIN(−) with programmable buffer - allows direct transducer interfacing and common-mode noise rejection. |
| Digital Interface | Three-wire SPI/QSPI/MICROWIRE/DSP-compatible - reduces isolation component count and simplifies microcontroller integration. |
| Filter Notch Frequency | Programmable (20 Hz, 25 Hz, 50 Hz, 60 Hz) - enables precise line-frequency rejection in noisy industrial environments. |
Pinout & Package
AD7715ARU-5 is housed in a 16-lead TSSOP package (RU suffix), 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC TSSOP layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCLK) | Serial clock input | Controls timing of serial data transfer; compatible with SPI, QSPI, MICROWIRE, and DSP master clocks. |
| 2 (MCLK IN) | Master clock input | Accepts external CMOS clock (400 kHz–2.5 MHz) or crystal/resonator connection for internal oscillator. |
| 3 (MCLK OUT) | Master clock output | Drives crystal/resonator when used in oscillator mode; open-drain when external clock applied to MCLK IN. |
| 4 (CS) | Chip select input | Active-low enables serial interface; allows multiple devices on shared SCLK/DIN/DOUT bus. |
| 5 (REF IN(+)) | Positive reference input | Accepts 2.5 V nominal reference voltage (±1%) for full-scale definition in AD7715ARU-5 configuration. |
| 6 (AGND) | Analog ground | Reference return for analog circuitry; must be separated from DGND for optimal noise performance. |
| 7 (DRDY) | Data ready output | Open-drain flag indicating valid conversion result available in data register. |
| 8 (RESET) | Hardware reset input | Active-low asynchronous reset; initializes registers and clears calibration status. |
| 9 (AVDD) | Analog supply | 5 V ±2.5% analog power rail; powers PGA, modulator, and analog filters. |
| 10 (AIN(+)) | Positive analog input | Differential input terminal; supports buffered/unbuffered operation and ±2.5 V bipolar range. |
| 11 (AIN(−)) | Negative analog input | Differential input terminal; establishes common-mode reference point for bipolar/unipolar modes. |
| 12 (REF IN(−)) | Negative reference input | Reference return node; tied to AGND in standard configuration for 2.5 V reference span. |
| 13 (DGND) | Digital ground | Return path for digital I/O and logic; requires star grounding with AGND at single point. |
| 14 (DVDD) | Digital supply | 3–5.25 V digital power rail; powers serial interface and register logic. |
| 15 (DIN) | Serial data input | Writes configuration data (setup, communications, test registers) during write cycles. |
| 16 (DOUT) | Serial data output | Reads conversion results and register contents; tri-state when CS is high. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain front end | Gains of 1, 2, 32, and 128 eliminate need for external signal conditioning stages when interfacing millivolt-level sensors. |
| On-chip self-calibration | Removes offset and gain errors internally without external components, reducing BOM cost and calibration labor. |
| Differential input and reference architecture | Enables rejection of common-mode noise up to 150 dB at 50/60 Hz - critical for EMI-prone industrial wiring. |
| Low-power standby mode | Reduces current to 20 µA (typ. 10 µA) - extends battery life in portable instrumentation and remote sensors. |
| Configurable digital filter | First-notch frequency selectable via register to optimize update rate (e.g., 16.7 Hz at 60 Hz notch) and noise floor. |
Applications
| Pressure Measurement | Temperature Measurement |
|---|---|
|
Use Scenario: High-accuracy pressure sensing in industrial process control using bridge-based pressure transducers with mV-level outputs. IC Role / Device Role / Timing Role: ADC front end performing PGA amplification, sigma-delta conversion, and digital filtering - replaces discrete op-amp + ADC solutions. Use Value: Achieves ±0.0015% linearity and 16-bit resolution without external gain/offset trimming, enabling <0.1% FS accuracy over temperature. |
Use Scenario: Precision RTD or thermocouple measurement in HVAC and environmental monitoring systems with long cable runs. IC Role / Device Role / Timing Role: Differential ADC with programmable 60 Hz notch filter and buffered inputs - rejects induced 50/60 Hz interference from AC mains. Use Value: Delivers 98 dB normal-mode and 150 dB common-mode rejection at line frequency, eliminating need for external notch filters or shielded cabling. |
| Smart Transmitters | Strain Gauge Instrumentation |
|
Use Scenario: 4–20 mA loop-powered smart transmitter with HART communication, requiring low quiescent current and high stability. IC Role / Device Role / Timing Role: Primary analog acquisition IC handling sensor excitation, signal conditioning, and digitization - operates from single 5 V supply. Use Value: 450 µA max supply current at 3 V and 1.1 mA at 5 V enables compliance with loop power budgets while maintaining 16-bit integrity. |
Use Scenario: Load cell readout in weighing scales and material testing equipment requiring sub-µV offset stability. IC Role / Device Role / Timing Role: Precision ADC with on-chip system calibration - corrects for sensor nonlinearity, amplifier drift, and PCB thermal gradients. Use Value: Bipolar zero drift of 0.5 µV/°C and recalibration capability ensure <10 ppm/°C effective system accuracy without manual 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 |
|---|---|---|---|
| AD7714ARU-5 | 16-bit, 4-channel multiplexed input vs. AD7715ARU-5's single channel; identical PGA, filter, and interface architecture. | Requires channel sequencing and timing management; less suitable for dedicated single-sensor systems. | Choose AD7714ARU-5 only when multi-sensor scanning is required; AD7715ARU-5 offers simpler register map and lower software overhead for single-input use. |
| ADS1220IPWR | 24-bit resolution, integrated PGA (1–128), but fixed 50/60 Hz rejection and no programmable notch; higher current (350 µA typical). | Lacks flexible digital filter configuration - cannot adjust update rate independently of rejection profile. | Prefer ADS1220IPWR for ultra-high-resolution applications where notch flexibility is secondary; AD7715ARU-5 remains superior for adaptive line-frequency rejection in variable-speed motor controls. |
Compared with AD7714ARU-5 and ADS1220IPWR, the AD7715ARU-5 provides optimal balance of single-channel simplicity, programmable filter notch, and proven 16-bit metrology-grade performance in 5 V industrial systems - making it the preferred choice for fixed-function, high-stability sensor interfaces.
Availability
AD7715ARU-5 is available at Aetrix Electronics and suitable for industrial process transmitters, precision temperature controllers, and strain gauge instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7715ARU-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, high-accuracy measurement applications including industrial automation, scientific instrumentation, and smart sensor systems.
FAQ
What is the maximum recommended master clock frequency for AD7715ARU-5?
The AD7715ARU-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 50/60 Hz rejection and noise performance, Analog Devices recommends using either 1 MHz or 2.4576 MHz - the latter enabling faster output update rates in high-gain configurations.
Does AD7715ARU-5 support both unipolar and bipolar input ranges?
Yes, AD7715ARU-5 supports both unipolar (0 mV to 2.5 V) and bipolar (±2.5 V) input ranges. The mode is selected via the B/U bit in the setup register. In bipolar mode, the negative input AIN(−) serves as the zero-reference point, enabling true differential measurement with symmetric full-scale swing around ground.
How does the programmable digital filter notch affect AD7715ARU-5 output update rate?
The AD7715ARU-5's first digital filter notch frequency directly determines output update rate: at 60 Hz notch, update rate is ~16.7 Hz; at 50 Hz, ~20 Hz; at 25 Hz, ~40 Hz. This relationship is fixed per notch setting and independent of PGA gain - unlike sampling rate, which varies with gain (e.g., fCLK/8 for G=32/128). The notch setting thus trades rejection depth for throughput.
Can AD7715ARU-5 operate with a 2.5 V reference while powered from 5 V AVDD?
Yes, AD7715ARU-5 is explicitly specified for 2.5 V reference input (REF IN(+) − REF IN(−)) under 5 V AVDD operation. Table 1 confirms REF IN(+) = 2.5 V nominal with ±1% tolerance for full performance. The device maintains 16-bit no-missing-codes and ±0.0015% INL under these conditions, making it suitable for systems using precision bandgap references.
What is the purpose of the BUF bit in the AD7715ARU-5 setup register?
The BUF bit enables or disables the input buffer amplifier in AD7715ARU-5. When BUF = 1, the buffer isolates the PGA input from source impedance, allowing accurate measurement with high-Z sensors (e.g., thermocouples); when BUF = 0, input impedance drops to ~10 kΩ, increasing power efficiency but limiting usable source resistance to <1 kΩ. Buffering also extends common-mode input range to AGND + 0.05 V to AVDD − 1.5 V.
AD7715ARU-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7715ARU-5 FAQ
1.How can I place an order for AD7715ARU-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715ARU-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 AD7715ARU-5 reliable?
The price and inventory of AD7715ARU-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715ARU-5 is usually 5 days.
3.What payment methods are accepted for AD7715ARU-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715ARU-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715ARU-5?
AD7715ARU-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715ARU-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 AD7715ARU-5?
For technical support, including AD7715ARU-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715ARU-5 requirements.
6.How does Aetrix verify that AD7715ARU-5 is sourced from the original manufacturer or authorized distributors?
All AD7715ARU-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 AD7715ARU-5 meets industry standards.
7.What is the process for return or replacement of AD7715ARU-5?
All AD7715ARU-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7715ARU-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 AD7715ARU-5 part is unused and in its original packaging.
Return procedure for AD7715ARU-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7715ARU-5 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
