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Analog Devices Inc. AD7714ARSZ-3
- Part No.:
- AD7714ARSZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7714ARSZ-3.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
AD7714ARSZ-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 architecture, and 3 V single-supply operation. It delivers ±0.0015% integral nonlinearity, <150 nV rms input-referred noise, and supports filter notch frequencies down to 10 Hz - ideal for high-precision weigh scale and loop-powered transducer signal conditioning.
For engineers reviewing the AD7714ARSZ-3 datasheet, AD7714ARSZ-3 pinout, AD7714ARSZ-3 application, or AD7714ARSZ-3 equivalent, key selection criteria include its 24-bit no-missing-codes performance at ≤60 Hz filter notches, 3 V supply compatibility, TSSOP-24 package footprint, and SPI/QSPI/MICROWIRE™-compatible three-wire serial interface for microcontroller integration.
Technical Context
The AD7714ARSZ-3 implements a charge-balancing sigma-delta modulator with on-chip digital filtering, enabling programmable first-notch cutoffs (10–1000 Hz) and settling time control via register configuration. Its front-end supports gain settings of 1–128 across five analog inputs, configurable as either three differential or five pseudo-differential channels.
It features self-, system-, and background calibration modes; reads/writes calibration coefficients; and includes Schmitt-triggered SCLK/DIN inputs only in Y-grade variants - not applicable to AD7714ARSZ-3 (A-grade, –40°C to +85°C). The device operates with external MCLK (400 kHz–2.5 MHz) and supports unipolar/bipolar coding with offset binary output format.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes (guaranteed ≤60 Hz filter notch) |
| Integral Nonlinearity | ±0.0015% FSR max - ensures high-accuracy endpoint linearity in precision measurement |
| Input Noise | <150 nV rms - enables sub-µV-level signal resolution in low-frequency applications |
| Supply Voltage | +3.0 V to +3.6 V AVDD - compatible with 3 V industrial and portable systems |
| PGA Gain Range | 1 to 128 - allows direct connection to mV-range transducers without external amplification |
| Reference Input | +1.25 V (±1%) - matches internal reference requirement for specified performance |
| Power Consumption | 1.65 mW typical (AVDD = DVDD = 3.3 V, fCLK = 1 MHz) - suitable for battery- or loop-powered designs |
Pinout & Package
AD7714ARSZ-3 is housed in a 24-lead Thin Shrink Small Outline Package (TSSOP), 0.150" body width, with exposed pad (RoHS-compliant, lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN6 | Analog input terminals | Support five pseudo-differential or three fully differential input channels; AIN1–AIN3 form differential pairs when configured |
| REF IN(+), REF IN(–) | Differential reference input | Accepts 1.25 V reference for AD7714ARSZ-3; defines full-scale range and noise rejection baseline |
| AVDD, DVDD, AGND, DGND | Power and ground rails | Separate analog/digital supplies reduce coupling; AGND/DGND must be connected at single point |
| SCLK, DIN, DOUT, CS, DRDY | Three-wire serial interface | Compatible with SPI/QSPI/MICROWIRE™; DRDY indicates conversion completion for synchronous read |
| MCLK IN, MCLK OUT | Master clock interface | Accepts 400 kHz–2.5 MHz external clock; MCLK OUT provides buffered clock output for daisy-chaining |
| SYNC, RESET, POL | Control and configuration | SYNC initiates synchronized conversions; RESET clears registers; POL selects unipolar/bipolar mode |
Key Features
| Feature | Design Value |
|---|---|
| Programmable digital filter | First-notch cutoff adjustable from 10 Hz to 1 kHz - enables rejection of 50/60 Hz mains interference and tailors settling time per channel |
| On-chip calibration engine | Self-, system-, and background calibration modes eliminate zero- and full-scale drift without external equipment |
| Flexible input configuration | Software-selectable three differential or five pseudo-differential inputs - maximizes channel count while preserving CMRR & NMR |
| Low-power standby mode | 10 µA typical current draw at 3.3 V - extends battery life in portable instrumentation |
| Transducer burnout detection | 1 µA nominal excitation current - verifies sensor continuity before conversion in critical measurement paths |
Applications
| Portable Weigh Scales | Pressure Transducers |
|---|---|
Use Scenario: Battery-powered handheld scales measuring 0.1 g resolution over 30 kg range using strain gauge bridges. IC Role / Device Role / Timing Role: ADC + PGA front end digitizing mV-level bridge outputs; performs ratiometric conversion against internal 1.25 V reference. Use Value: 24-bit resolution and 0.0015% INL enable stable 1:100,000 dynamic range without external amplifiers or calibration hardware. | Use Scenario: Industrial pressure sensors in 4–20 mA loop-powered transmitters with HART communication. IC Role / Device Role / Timing Role: Signal conditioner converting bridge output to digital; interfaces via three-wire SPI to loop controller MCU. Use Value: Low 1.65 mW power dissipation and 3 V operation allow full functionality within 3.5 mA headroom of 4–20 mA loop budget. |
| Loop-Powered Systems | Portable Industrial Instruments |
Use Scenario: Remote temperature/flow transmitters powered solely from 4–20 mA current loop. IC Role / Device Role / Timing Role: Precision ADC acquiring thermocouple or RTD signals; uses internal burnout current for open-wire detection. Use Value: 10 µA standby current and programmable filter allow ultra-low-power wake-on-event operation with fast 100 ms settling at 50 Hz notch. | Use Scenario: Handheld multimeters and data loggers requiring multi-range DC voltage/current measurement. IC Role / Device Role / Timing Role: Core ADC with selectable gain and bipolar/unipolar modes supporting auto-ranging and offset nulling. Use Value: On-chip calibration registers and software-configurable filter notches eliminate need for manual trim pots or external timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7793BRUZ | 24-bit, 16-bit effective resolution at 4.17 Hz; lower power (400 µA typ); integrated 2.5 V ref; 16-pin TSSOP | Lacks 5-input multiplexer; no burnout current; optimized for ultra-low-power sensor nodes vs. multi-channel industrial | Select AD7793BRUZ for simpler 3-channel systems where board space and quiescent current are primary constraints |
| ADS124S08IPWR | 24-bit, 2kSPS max; integrated PGA, reference, and oscillator; 20-pin TSSOP; SPI interface | Higher speed but lower noise floor (150 nV vs. 140 nV); no Schmitt triggers; different register map and calibration flow | Choose ADS124S08IPWR when integrating clock source and reference simplifies BOM, and 2 kSPS suffices for target application |
Compared with AD7714ARSZ-3, AD7793BRUZ offers lower power and smaller footprint but sacrifices input channel count and transducer burnout capability; ADS124S08IPWR integrates more functions but trades off noise performance and requires redesign of calibration and timing firmware.
Availability
AD7714ARSZ-3 is available at Aetrix Electronics and suitable for portable weigh scales, pressure transducers, and loop-powered systems requiring stable component supply, long-term manufacturability, and guaranteed RoHS-compliant sourcing.
Supply support for AD7714ARSZ-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 belongs to Analog Devices' precision sigma-delta ADC product line, designed specifically for low-frequency, high-resolution industrial and instrumentation applications demanding exceptional linearity, low noise, and integrated signal conditioning.
FAQ
What is the maximum recommended master clock frequency for AD7714ARSZ-3?
The AD7714ARSZ-3 supports a master clock (MCLK IN) frequency up to 2.5 MHz for specified performance. Operation above this limit may degrade noise, linearity, or timing margins. At 2.4576 MHz, the device achieves optimal filter notch resolution and conversion rate trade-offs, especially when using higher PGA gains (≥8), which require the BST bit to be set in the Filter High Register.
Does AD7714ARSZ-3 support both unipolar and bipolar input ranges?
Yes, AD7714ARSZ-3 supports both unipolar and bipolar input ranges via the B/U bit in the Filter High Register. In unipolar mode (B/U = 1), the input range is 0 to +VREF/GAIN; in bipolar mode (B/U = 0), it is ±VREF/GAIN. Output coding follows offset binary for unipolar and straight binary for bipolar - both are fully supported and configurable in real time.
Can AD7714ARSZ-3 operate with a 1.25 V external reference?
Yes, AD7714ARSZ-3 is specified for use with a +1.25 V reference (±1%) applied between REF IN(+) and REF IN(–). This matches the internal reference requirement for 3 V operation and ensures full performance compliance, including 24-bit no-missing-codes behavior at filter notches ≤60 Hz and ±0.0015% INL.
What is the purpose of the transducer burnout current in AD7714ARSZ-3?
The AD7714ARSZ-3 provides a 1 µA nominal transducer burnout current to detect open-circuit conditions in connected sensors (e.g., RTDs or strain gauges). This feature allows system-level fault detection before conversion begins, improving reliability in safety-critical or automated test applications without requiring external circuitry.
Is AD7714ARSZ-3 pin-compatible with other AD7714 variants like AD7714AR-3 or AD7714ARS-3?
Yes, AD7714ARSZ-3 shares identical pinout and footprint with AD7714AR-3 (SOIC-24) and AD7714ARS-3 (SSOP-28) only in terms of signal function mapping - but AD7714ARSZ-3 (TSSOP-24) is not mechanically pin-compatible with SSOP-28 due to different lead count and pitch. All A-grade 3 V variants use the same register set, timing, and electrical interface.
AD7714ARSZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7714ARSZ-3 FAQ
1.How can I place an order for AD7714ARSZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7714ARSZ-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 AD7714ARSZ-3 reliable?
The price and inventory of AD7714ARSZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7714ARSZ-3 is usually 5 days.
3.What payment methods are accepted for AD7714ARSZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7714ARSZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7714ARSZ-3?
AD7714ARSZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7714ARSZ-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 AD7714ARSZ-3?
For technical support, including AD7714ARSZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7714ARSZ-3 requirements.
6.How does Aetrix verify that AD7714ARSZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7714ARSZ-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 AD7714ARSZ-3 meets industry standards.
7.What is the process for return or replacement of AD7714ARSZ-3?
All AD7714ARSZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7714ARSZ-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 AD7714ARSZ-3 part is unused and in its original packaging.
Return procedure for AD7714ARSZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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