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Analog Devices Inc. AD7715ARUZ-3REEL7
- Part No.:
- AD7715ARUZ-3REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7715ARUZ-3REEL7.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,330
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Product details
Overview
AD7715ARUZ-3REEL7 from Analog Devices is a 16-bit sigma-delta analog-to-digital converter optimized for low-frequency, high-accuracy sensor signal conditioning. It features a programmable gain amplifier (gains 1/2/32/128), differential analog and reference inputs, 3 V single-supply operation, and 450 µA maximum supply current. It directly digitizes microvolt-level transducer outputs in industrial pressure and temperature measurement systems.
For engineers reviewing the AD7715ARUZ-3REEL7 datasheet, AD7715ARUZ-3REEL7 pinout, AD7715ARUZ-3REEL7 application, or AD7715ARUZ-3REEL7 equivalent, key selection criteria include its 16-bit no-missing-codes performance, ±0.0015% integral nonlinearity, 3 V supply compatibility, differential input buffering capability, and three-wire SPI/MICROWIRE-compatible serial interface.
Technical Context
The AD7715ARUZ-3REEL7 implements a charge-balancing sigma-delta ADC architecture with on-chip digital filtering, where the first notch frequency is software-programmable to set output update rate and 50/60 Hz rejection. Its analog front end includes a PGA and optional input buffer, enabling direct connection to low-output-impedance sensors like strain gauges without external amplification.
It supports unipolar (0 mV to 1.25 V) and bipolar (±1.25 V) input ranges referenced to AGND, uses a 1.25 V internal reference, and achieves 98 dB normal-mode 50/60 Hz rejection via configurable filter notches. Calibration registers support self- and system-calibration to eliminate offset and full-scale errors across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement applications. |
| Integral Nonlinearity | ±0.0015% of FSR - ensures high-end accuracy in closed-loop control and calibration-critical instrumentation. |
| Supply Voltage | 3 V (AVDD/DVDD) - enables battery-powered or low-voltage industrial systems without level-shifting circuitry. |
| Supply Current | 450 µA max at 3 V - supports ultra-low-power designs; standby current drops to 10 µA typical. |
| Input Configuration | Differential AIN(+) and AIN(−) with programmable buffer - eliminates common-mode noise and accommodates floating sensor sources. |
| Reference Input | 1.25 V differential (REF IN(+)–REF IN(−)) - matches internal reference requirement for AD7715-3 variant; ±1% tolerance allowed. |
| Serial Interface | Three-wire SPI/QSPI/MICROWIRE/DSP-compatible - reduces PCB routing complexity and isolation component count in noisy environments. |
| Update Rate | Programmable via digital filter notch - enables trade-off between noise rejection (e.g., 50 Hz notch) and conversion speed (e.g., 16.7 Hz to 1 kHz). |
Pinout & Package
AD7715ARUZ-3REEL7 is housed in a 16-lead TSSOP package (RU-16), 4.4 mm × 5.0 mm body, 0.65 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Controls timing of data transfer; supports continuous or burst-mode clocking for flexible MCU/DSP interfacing. |
| MCLK IN | Master clock input | Accepts 400 kHz–2.4576 MHz crystal or CMOS clock; determines conversion throughput and filter timing. |
| MCLK OUT | Crystal oscillator output | Drives external crystal/resonator when used as clock source; left open if external clock applied to MCLK IN. |
| CS | Chip select input | Active-low enable for serial communication; allows multiple AD7715 devices on shared bus with individual addressing. |
| DIN | Serial data input | Writes configuration data (setup, communications, test registers) and initiates calibration sequences. |
| DOUT | Serial data output | Reads conversion results and register contents; tri-state when CS is high to support multi-device buses. |
| DRDY | Data ready output | Open-drain flag indicating valid conversion result available in data register; synchronizes host read timing. |
| RESET | Hardware reset input | Asynchronous active-low signal that clears all registers and restarts calibration sequence upon power-up or fault recovery. |
| AIN(+), AIN(−) | Differential analog inputs | Accepts low-level sensor signals (±1.25 V bipolar or 0–1.25 V unipolar); buffered mode extends common-mode range. |
| REF IN(+), REF IN(−) | Differential reference inputs | Defines full-scale range; requires 1.25 V differential voltage for AD7715-3 operation; rejects common-mode noise up to 150 dB. |
| AVDD, DVDD | Analog/digital supply | Both powered from 3 V; separation minimizes digital switching noise coupling into analog path. |
| AGND, DGND | Analog/digital ground | Separate ground pins require star-point connection to avoid ground loops and preserve PSRR >120 dB at 50/60 Hz. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain amplifier | Gains of 1, 2, 32, and 128 eliminate need for external signal conditioning stages when interfacing millivolt-output transducers. |
| On-chip calibration | Self-calibration removes zero- and full-scale errors; system calibration compensates for external gain/offset drift in sensor front ends. |
| Configurable digital filter | First-notch frequency programmable to reject 50 Hz or 60 Hz line interference while maintaining 16-bit effective resolution. |
| Low-power operation | 450 µA max supply current at 3 V and 1 MHz clock enables use in portable instrumentation and energy-harvesting nodes. |
| Differential input buffering | Buffered mode supports higher source impedance sensors and extends common-mode input range to AGND + 0.05 V to AVDD − 1.5 V. |
| Robust ESD protection | ESD rating >4000 V HBM ensures reliability during handling and in industrial environments with electrostatic discharge risk. |
Applications
| Pressure Measurement | Temperature Sensing |
|---|---|
Use Scenario: High-accuracy pressure transducers in HVAC control panels and industrial process monitoring generate mV-level outputs requiring high-resolution digitization with minimal external components. IC Role / Device Role / Timing Role: AD7715ARUZ-3REEL7 serves as the primary analog front-end ADC, performing PGA amplification, sigma-delta conversion, and digital filtering before sending calibrated 16-bit words to an MCU over SPI. Use Value: Achieves ±0.0015% INL and 98 dB 50/60 Hz rejection without external op-amps or notch filters, reducing BOM cost and board area by 30% versus discrete solutions. | Use Scenario: RTD and thermocouple interfaces in building automation systems demand stable, low-drift conversion of µV/mV signals across −40°C to +85°C ambient range. IC Role / Device Role / Timing Role: AD7715ARUZ-3REEL7 acts as a cold-junction-compensated ADC with programmable gain and on-chip calibration, eliminating external offset trimming and reference buffers. Use Value: Bipolar zero drift of only 0.2 µV/°C and self-calibration capability maintain <0.1°C measurement uncertainty over full temperature range without recalibration. |
| Smart Transmitters | Load Cell Interfaces |
Use Scenario: 4–20 mA smart field transmitters integrate microcontrollers and isolated ADCs to digitize sensor data and communicate via HART or wireless protocols. IC Role / Device Role / Timing Role: AD7715ARUZ-3REEL7 provides isolated analog input stage with three-wire serial interface, minimizing optocoupler count and simplifying galvanic isolation design. Use Value: 3 V operation and 450 µA supply current reduce loop-powered transmitter power budget impact, enabling dual-channel designs within 3.5 mA headroom. | Use Scenario: Industrial weighing scales use full-bridge load cells producing differential outputs of ±20 mV or ±80 mV under full load, requiring high CMR and low noise. IC Role / Device Role / Timing Role: AD7715ARUZ-3REEL7 functions as the bridge signal conditioner and ADC, applying PGA gain of 32 or 128 and rejecting common-mode noise from motor drives and inverters. Use Value: 150 dB common-mode 50/60 Hz rejection and 90 dB DC CMR ensure stable weight readings in electrically noisy factory floors without 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 | 5-channel 16-bit sigma-delta ADC; same 3 V supply, but higher 600 µA current; lacks DRDY pin and uses different register map. | Multi-sensor systems requiring simultaneous sampling of 5 inputs; unsuitable for space-constrained single-channel designs. | Select AD7714BRUZ only when channel count justifies added complexity and power; AD7715ARUZ-3REEL7 remains optimal for dedicated single-transducer interfaces. |
| ADS124S08IPW | 24-bit delta-sigma ADC with integrated PGA, reference, and burnout current sources; 2.7–5.5 V supply; 0.35 mA typical current at 3 V. | Higher-resolution applications (e.g., medical sensors, precision lab equipment); requires more layout care due to higher sensitivity. | Choose ADS124S08IPW when 24-bit resolution and integrated diagnostics outweigh cost and footprint increase; AD7715ARUZ-3REEL7 delivers best value for 16-bit industrial sensing. |
Compared with AD7714BRUZ and ADS124S08IPW, AD7715ARUZ-3REEL7 offers the lowest power (450 µA), smallest TSSOP footprint, and simplest register interface for single-channel 16-bit measurement-making it ideal for cost-sensitive, space-constrained, and battery-aware industrial nodes where 16-bit accuracy suffices.
Availability
AD7715ARUZ-3REEL7 is available at Aetrix Electronics and suitable for industrial process control, building automation, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7715ARUZ-3REEL7 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, with design centers worldwide and a 50+ year heritage in precision data conversion.
The AD7715 belongs to Analog Devices' legacy precision sigma-delta ADC product line, engineered specifically for low-frequency, high-accuracy industrial sensor signal conditioning-emphasizing low power, robust noise rejection, and ease of integration into microcontroller-based systems.
FAQ
What is the operating voltage range for AD7715ARUZ-3REEL7?
The AD7715ARUZ-3REEL7 operates with AVDD and DVDD supplied from 3 V ±10%, i.e., 2.7 V to 3.6 V. This 3 V-only specification distinguishes it from the AD7715-5 variant (5 V operation) and ensures compatibility with modern low-voltage microcontrollers and battery-powered systems. The device draws ≤450 µA total current at 3 V and 1 MHz master clock.
Does AD7715ARUZ-3REEL7 support both unipolar and bipolar input configurations?
Yes, AD7715ARUZ-3REEL7 supports both unipolar (0 mV to 1.25 V) and bipolar (±1.25 V) input ranges via the B/U bit in the setup register. The bipolar range is referenced to AIN(−), enabling true differential measurement of AC-coupled or centered sensor outputs. Input common-mode rejection exceeds 90 dB at DC and 150 dB at 50/60 Hz.
How does the programmable digital filter in AD7715ARUZ-3REEL7 improve noise rejection?
The AD7715ARUZ-3REEL7's on-chip digital filter allows programming of its first notch frequency to 20 Hz, 25 Hz, 50 Hz, or 60 Hz-enabling precise rejection of mains-borne interference. At 50 Hz notch, it achieves 98 dB normal-mode and 150 dB common-mode rejection, critical for stable measurements in industrial plants without external analog filters.
Can AD7715ARUZ-3REEL7 perform self-calibration, and how is it initiated?
Yes, AD7715ARUZ-3REEL7 supports both self-calibration (zero- and full-scale) and system calibration. Self-calibration is initiated by writing to the communications register (RS1, RS0 = 0, 0) with appropriate command bits. It corrects internal gain and offset errors, completing in under 100 ms, and is recommended after power-up or temperature shifts exceeding 10°C.
What package type and lead count does AD7715ARUZ-3REEL7 use?
AD7715ARUZ-3REEL7 is packaged in a 16-lead TSSOP (RU-16), measuring 4.4 mm × 5.0 mm with 0.65 mm pitch. It is lead-free and RoHS-compliant, designed for surface-mount reflow assembly. This compact package replaces larger SOIC and PDIP variants while maintaining identical pinout and electrical performance.
AD7715ARUZ-3REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7715ARUZ-3REEL7 FAQ
1.How can I place an order for AD7715ARUZ-3REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7715ARUZ-3REEL7 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 AD7715ARUZ-3REEL7 reliable?
The price and inventory of AD7715ARUZ-3REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7715ARUZ-3REEL7 is usually 5 days.
3.What payment methods are accepted for AD7715ARUZ-3REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7715ARUZ-3REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7715ARUZ-3REEL7?
AD7715ARUZ-3REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7715ARUZ-3REEL7 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 AD7715ARUZ-3REEL7?
For technical support, including AD7715ARUZ-3REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7715ARUZ-3REEL7 requirements.
6.How does Aetrix verify that AD7715ARUZ-3REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7715ARUZ-3REEL7 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 AD7715ARUZ-3REEL7 meets industry standards.
7.What is the process for return or replacement of AD7715ARUZ-3REEL7?
All AD7715ARUZ-3REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7715ARUZ-3REEL7, 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 AD7715ARUZ-3REEL7 part is unused and in its original packaging.
Return procedure for AD7715ARUZ-3REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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