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Analog Devices Inc. AD7714AN-3
- Part No.:
- AD7714AN-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7714AN-3.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,103
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Product details
Overview
AD7714AN-3 from Analog Devices is a 24-bit sigma-delta analog-to-digital converter (ADC) with integrated programmable-gain amplifier (PGA), five-channel pseudo-differential or three-channel fully differential input, and 3 V single-supply operation. It delivers 0.0015% integral nonlinearity, <150 nV rms noise, and supports filter notch programming for precision low-frequency measurement in loop-powered industrial sensors.
For engineers reviewing the AD7714AN-3 datasheet, AD7714AN-3 pinout, AD7714AN-3 application, or AD7714AN-3 equivalent, key selection criteria include its 3 V supply compatibility, 24-bit no-missing-codes performance at ≤60 Hz filter notches, on-chip self/system/background calibration, SPI/QSPI/MICROWIRE-compatible three-wire serial interface, and support for transducer burnout detection.
Technical Context
The AD7714AN-3 employs a charge-balancing sigma-delta architecture with an on-chip digital filter whose first notch is software-programmable-enabling precise trade-offs between settling time and noise rejection at 10 Hz, 25 Hz, 50 Hz, 60 Hz, 100 Hz, 250 Hz, 500 Hz, or 1 kHz. Its front end features a PGA with selectable gains of 1 to 128, configurable as either three fully differential inputs or five pseudo-differential inputs.
It operates from a single +3.0 V to +3.6 V AVDD supply and +3.0 V to +5.25 V DVDD, with logic inputs compatible with 3 V CMOS levels. The device includes Schmitt-triggered SCLK/DIN only in Y-grade variants-not in AD7714AN-3-confirming its A-grade specification per ordering guide and electrical tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24 bits no missing codes (guaranteed at filter notches ≤60 Hz) |
| Integral Nonlinearity | ±0.0015% of FSR max (ensures high-accuracy DC measurement without code gaps) |
| Input Noise | <150 nV rms (supports µV-level signal resolution in weigh scales and pressure transducers) |
| Supply Voltage | +3.0 V to +3.6 V AVDD (enables direct integration into 3 V loop-powered systems) |
| Power Consumption | 0.27 mA AVDD current typ (at 1 MHz MCLK, BUFFER = 0 V; enables ultra-low-power sensor nodes) |
| Reference Input | +1.25 V nominal (REF IN(+)–REF IN(–); ±1% tolerance ensures stable full-scale calibration) |
| Filter Notch Range | 10 Hz to 1 kHz (software-selectable via control register for optimal 50/60 Hz line rejection) |
Pinout & Package
AD7714AN-3 is housed in a 24-pin plastic DIP (N-24) package with 0.3-inch width, through-hole mounting, and standard 0.1-inch pin pitch. Pin functions are defined per Analog Devices AD7714 datasheet Rev. C, Section "Pin Configuration and Function Descriptions".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN6 | Analog input terminals | Support five pseudo-differential or three fully differential input channels; AIN1–AIN2, AIN3–AIN4, AIN5–AIN6 form differential pairs |
| REF IN(+), REF IN(–) | Differential reference input | Accepts +1.25 V reference (AD7714AN-3); sets full-scale range as VREF/GAIN |
| AVDD, DGND, AGND | Power and ground rails | Separate analog/digital grounds minimize noise coupling; AVDD powers modulator and PGA |
| SCLK, DIN, DOUT, CS | Three-wire serial interface | Compatible with SPI/QSPI/MICROWIRE; CS enables slave select; no external pull-ups required |
| DRDY | Data ready indicator | Active-low open-drain output signals conversion completion; synchronizes host read timing |
| MCLK IN, MCLK OUT | Master clock interface | Accepts 400 kHz–2.5 MHz external clock or crystal; MCLK OUT supports daisy-chaining |
| SYNC, RESET, POL | Control and configuration | SYNC initiates new conversion; RESET clears registers; POL selects unipolar/bipolar coding |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain front end | Gains of 1–128 eliminate external signal conditioning for strain gages and RTDs |
| On-chip calibration system | Self-, system-, and background calibration remove zero/full-scale drift without host intervention |
| Configurable input topology | Software-selectable between three differential or five pseudo-differential inputs per channel map |
| Transducer burnout detection | 1 µA nominal burnout current enables open-wire fault detection in 4–20 mA loops |
| High CMRR & line rejection | 150 dB common-mode 50/60 Hz rejection ensures robust operation in noisy industrial environments |
Applications
| Portable Weigh Scales | Loop-Powered Pressure Transmitters |
|---|---|
|
Use Scenario: Battery-operated handheld scale measuring load cells with mV/V output under variable ambient temperature. IC Role / Device Role / Timing Role: Precision ADC with integrated PGA and on-chip calibration performs direct digitization of low-level bridge outputs. Use Value: 24-bit resolution and 0.0015% INL enable 1:100,000 dynamic range; 3 V operation extends battery life beyond 12 months. |
Use Scenario: 4–20 mA field transmitter converting pressure sensor output in hazardous area enclosures. IC Role / Device Role / Timing Role: Signal conditioner and ADC with burnout detection and programmable filter rejects 50/60 Hz interference in plant wiring. Use Value: 150 dB common-mode rejection and 1 µA burnout current ensure reliable fault reporting and metrological integrity. |
| Industrial Temperature Monitoring | Smart Sensor Nodes (IoT) |
|
Use Scenario: DIN-rail mounted module reading multiple RTD or thermocouple inputs with cold-junction compensation. IC Role / Device Role / Timing Role: Multi-channel sigma-delta ADC with software-configurable gain and filter notch adapts to varying sensor sensitivities. Use Value: Five pseudo-differential inputs reduce external multiplexer count; background calibration maintains accuracy across –40°C to +85°C. |
Use Scenario: Wireless node acquiring analog sensor data with minimal BOM and PCB area for edge AI inference. IC Role / Device Role / Timing Role: Low-power ADC with 0.27 mA typical AVDD current and power-down mode (<10 µA) enables duty-cycled sensing. Use Value: Three-wire serial interface reduces GPIO count; on-chip registers store calibration coefficients for firmware portability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7718ARZ | 24-bit, 8-channel, 3 V/5 V, integrated reference, but no burnout current; higher power (1.2 mA typ) | Preferred where internal reference simplifies layout, but unsuitable for open-wire diagnostics | Select AD7714AN-3 when transducer burnout detection and ultra-low standby current (<10 µA) are required |
| ADS124S08IPW | 24-bit, 7-channel, integrated PGA + reference + oscillator; lower noise (120 nV rms), but requires 2.7–5.5 V DVDD only | Better for space-constrained designs needing fewer external components, but lacks dedicated analog ground pin | Choose AD7714AN-3 for legacy 3 V loop-powered systems requiring separate AGND/DGND isolation and proven field reliability |
Compared with AD7714AN-3, AD7718ARZ offers more channels and an internal reference but omits burnout detection and consumes ~4× more active current; ADS124S08IPW integrates more functions but sacrifices analog ground separation critical for high-EMI industrial signal chains.
Availability
AD7714AN-3 is available at Aetrix Electronics and suitable for portable industrial instruments, loop-powered pressure transmitters, and smart sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for AD7714AN-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7714 product line was designed specifically for low-frequency, high-resolution measurement applications-including weigh scales, pressure transducers, and portable instrumentation-where noise, drift, and power efficiency are critical.
FAQ
What is the maximum recommended master clock frequency for AD7714AN-3?
The AD7714AN-3 supports a master clock (MCLK IN) frequency from 400 kHz to 2.5 MHz. Operation above 2.5 MHz is not specified and may compromise timing margins, noise performance, or conversion accuracy. For optimal 24-bit no-missing-codes behavior at ≤60 Hz filter notches, 2.4576 MHz is commonly used per datasheet test conditions.
Does AD7714AN-3 support both unipolar and bipolar input ranges?
Yes, AD7714AN-3 supports both unipolar (0 to +VREF/GAIN) and bipolar (±VREF/GAIN) input ranges. The mode is selected via the B/U bit in the Filter High register. Unipolar mode uses binary coding; bipolar mode uses offset binary coding-both are fully supported in all gain and filter configurations of AD7714AN-3.
Can AD7714AN-3 operate with a 1.25 V external reference?
Yes, AD7714AN-3 is specified for +1.25 V nominal reference voltage (REF IN(+) – REF IN(–)) with ±1% tolerance for full performance. This matches its 3 V supply grade and enables accurate full-scale scaling without external reference buffers-critical for compact loop-powered designs using AD7714AN-3.
What is the purpose of the SYNC pin on AD7714AN-3?
The SYNC pin on AD7714AN-3 initiates a new conversion cycle and resets the digital filter. When pulled low, it halts ongoing conversions and clears filter registers; releasing SYNC starts acquisition synchronized to the next MCLK edge. This enables deterministic timing control and multi-device synchronization-essential in AD7714AN-3-based multi-channel data loggers.
How does the programmable filter notch affect AD7714AN-3's effective resolution?
The programmable filter notch directly determines AD7714AN-3's effective resolution and settling time: at ≤60 Hz notches, 24-bit no-missing-codes is guaranteed; at 100 Hz, resolution drops to 22 bits; at 250 Hz, to 18 bits. This trade-off allows designers to optimize for either noise rejection (low notch) or throughput (high notch) within AD7714AN-3's architecture.
AD7714AN-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 1k
- Number of Inputs:
- 3, 5
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-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:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7714AN-3 FAQ
1.How can I place an order for AD7714AN-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7714AN-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 AD7714AN-3 reliable?
The price and inventory of AD7714AN-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7714AN-3 is usually 5 days.
3.What payment methods are accepted for AD7714AN-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7714AN-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7714AN-3?
AD7714AN-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7714AN-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 AD7714AN-3?
For technical support, including AD7714AN-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7714AN-3 requirements.
6.How does Aetrix verify that AD7714AN-3 is sourced from the original manufacturer or authorized distributors?
All AD7714AN-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 AD7714AN-3 meets industry standards.
7.What is the process for return or replacement of AD7714AN-3?
All AD7714AN-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7714AN-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 AD7714AN-3 part is unused and in its original packaging.
Return procedure for AD7714AN-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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