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Analog Devices Inc. AD7714AN-5
- Part No.:
- AD7714AN-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7714AN-5.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,465
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Product details
Overview
AD7714AN-5 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-wire SPI-compatible serial interface. It operates from a +4.75 V to +5.25 V AVDD supply, delivers ±0.0015% integral nonlinearity, <150 nV rms noise, and supports filter notch frequencies down to 10 Hz - ideal for high-precision industrial weigh scales and loop-powered pressure transducers.
For engineers reviewing the AD7714AN-5 datasheet, AD7714AN-5 pinout, AD7714AN-5 application, or AD7714AN-5 equivalent, this page provides verified technical context, real-world use cases, calibrated performance parameters, package-specific layout guidance, and validated alternative options for low-frequency measurement systems requiring stable 24-bit resolution without missing codes.
Technical Context
The AD7714AN-5 implements a charge-balancing sigma-delta architecture with on-chip digital filtering, enabling up to 24-bit no-missing-codes performance at DC and low frequencies. Its programmable gain front end (GAIN = 1–128) directly interfaces strain gauges and transducers, eliminating external signal conditioning. The first digital filter notch is software-configurable via control registers to adjust cutoff frequency and settling time.
It features self-calibration, system calibration, and background calibration modes, plus read/write access to on-chip calibration coefficients. The device supports unipolar (0 to +VREF/GAIN) and bipolar (±VREF/GAIN) input ranges, with reference input voltage of +2.5 V (±1%) and absolute analog input limits of AGND – 30 mV to AVDD + 30 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| No Missing Codes | 24 bits minimum (Bipolar mode, filter notch ≤ 60 Hz) - guarantees monotonicity across full scale for precision metrology. |
| Integral Nonlinearity | ±0.0015% of FSR max (filter notch ≤ 60 Hz) - ensures accurate endpoint linearity in calibration-critical applications. |
| Output Noise | <150 nV rms (typical, dependent on gain and filter setting) - enables sub-microvolt resolution in low-noise sensor interfaces. |
| Power Supply | +4.75 V to +5.25 V AVDD; +3 V to +5.25 V DVDD - compatible with standard 5 V industrial logic and isolated loop-powered systems. |
| Input Channels | Five pseudo-differential or three fully differential analog inputs - supports multi-sensor configurations without external multiplexing. |
| Reference Voltage | +2.5 V (±1%) REF IN(+) to REF IN(–) - defines full-scale range; functional down to 1.25 V but specified performance requires 2.5 V. |
| Serial Interface | 3-wire SPI/QSPI/MICROWIRE/DSP-compatible - reduces isolation component count and PCB interconnect complexity. |
Pinout & Package
The AD7714AN-5 is housed in a 24-pin plastic dual-in-line package (PDIP), 0.3 inch wide, with through-hole mounting and industry-standard lead spacing. Pin functions are electrically and thermally optimized for low-noise analog signal acquisition in mixed-signal industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog Power Supply | +4.75 V to +5.25 V supply for analog section; must be decoupled near pin with 10 µF tantalum + 0.1 µF ceramic. |
| DVDD | Digital Power Supply | +3 V to +5.25 V supply for digital core and interface; separate from AVDD to minimize noise coupling. |
| AGND / DGND | Analog & Digital Grounds | Separate ground pins require star-point connection at single point to avoid ground loops and preserve PSRR. |
| REF IN(+), REF IN(–) | Differential Reference Input | Accepts +2.5 V reference; common-mode range AGND to AVDD; defines ADC full-scale voltage. |
| AIN1–AIN6 | Analog Input Terminals | Support configurable pseudo-differential (e.g., AIN1+/AIN2–) or fully differential (e.g., AIN1+/AIN1–) pairs per channel selection. |
| SCLK, DIN, DOUT, CS | 3-Wire Serial Interface | Compatible with SPI master; CS active-low enables communication; DOUT is tri-state when CS high. |
| DRDY | Data Ready Output | Open-drain output signals conversion completion; used for interrupt-driven or polled data acquisition. |
| MCLK IN / MCLK OUT | Master Clock Interface | Accepts 400 kHz–2.5 MHz clock; internal oscillator disabled when external clock applied. |
| POL, SYNC, RESET | Control Inputs | POL selects unipolar/bipolar coding; SYNC initiates new conversion; RESET clears internal registers. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Front End (GAIN = 1–128) | Eliminates need for external op-amp stages when interfacing mV-level transducer outputs like load cells or RTDs. |
| Configurable Input Topology | Software-selectable between three fully differential or five pseudo-differential channels - maximizes channel density per IC. |
| On-Chip Calibration Engine | Self-, system-, and background-calibration modes remove zero-scale and full-scale errors without host processor intervention. |
| High Common-Mode Rejection | 150 dB @ 50/60 Hz (common-mode) and 100 dB @ 50/60 Hz (normal-mode) - rejects power-line interference in noisy industrial settings. |
| Low Power in Standby | 40 µA max standby current (typ. 20 µA at +5 V) - enables battery-backed or energy-harvested portable instrumentation. |
Applications
| Portable Weigh Scales | Loop-Powered Systems |
|---|---|
Use Scenario: Battery-operated handheld or platform scales measuring 0.1 g to 100 kg with temperature compensation. IC Role / Device Role / Timing Role: Primary signal conditioner and ADC; digitizes millivolt-level bridge outputs from strain gauges with 24-bit resolution. Use Value: Delivers 0.0015% INL and <150 nV rms noise to resolve sub-gram weight changes while consuming <500 µA total supply current. | Use Scenario: 4–20 mA current-loop transmitters for pressure, flow, or temperature sensors in hazardous areas. IC Role / Device Role / Timing Role: High-accuracy ADC with integrated PGA and serial interface; interfaces directly to sensor bridge and microcontroller over 3-wire bus. Use Value: Enables full 24-bit digitization within 3.5 mA loop budget using AVDD = +5 V and DVDD = +3.3 V, with programmable filter notch for 50/60 Hz rejection. |
| Pressure Transducers | Industrial Data Acquisition Modules |
Use Scenario: OEM pressure sensors for HVAC, process control, or medical devices requiring long-term stability and NIST-traceable calibration. IC Role / Device Role / Timing Role: Precision analog front end; accepts ratiometric bridge outputs, applies gain, filters, and converts to serial digital output. Use Value: On-chip calibration coefficient storage allows field recalibration without firmware update; 0.5 µV/°C offset drift (gain = 1) ensures accuracy over –40°C to +85°C. | Use Scenario: Modular rack-mounted DAQ units acquiring multiple sensor types (thermocouples, RTDs, strain) with shared timing and synchronization. IC Role / Device Role / Timing Role: Channelized ADC subsystem; each AD7714AN-5 handles up to five sensor inputs with independent gain/filter configuration. Use Value: Five pseudo-differential inputs reduce external multiplexer count; DRDY interrupt enables deterministic sampling across multiple ICs via shared SYNC signal. |
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 |
|---|---|---|---|
| AD7718BRUZ | 24-bit, 8-channel, 5 V operation; integrated reference; higher integration but larger 32-lead TSSOP package. | Designed for multi-channel simultaneous sampling; lacks standalone PGA flexibility of AD7714AN-5. | Select when board space permits larger package and system benefits from on-chip 2.5 V reference and extra channels. |
| ADS1258IPWR | 24-bit, 8-channel, 5 V operation; faster throughput (up to 125 kSPS); no internal PGA; requires external gain stage. | Optimized for high-speed data logging; lower noise floor but no built-in burnout current or Schmitt-triggered inputs. | Select when sampling rate >10 SPS is required and external signal conditioning is already present. |
Compared with AD7714AN-5, AD7718BRUZ offers more channels and an integrated reference but sacrifices PGA configurability and DIP packaging; ADS1258IPWR provides higher speed and lower noise but demands external gain and lacks transducer burnout current - making AD7714AN-5 uniquely suited for low-power, isolated, single-chip transducer interfaces in legacy industrial designs.
Availability
AD7714AN-5 is available at Aetrix Electronics and suitable for portable industrial instruments, loop-powered transmitters, and pressure transducer modules requiring stable component supply, long-lifecycle support, and proven reliability in harsh ambient conditions.
Supply support for AD7714AN-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7714 product line was engineered specifically for low-frequency, high-accuracy measurement systems - delivering integrated signal conditioning, calibration, and serial interface in a single IC to simplify design of smart sensors and portable instrumentation.
FAQ
What is the maximum recommended master clock frequency for AD7714AN-5?
The AD7714AN-5 supports a master clock (MCLK IN) frequency of up to 2.5 MHz for specified performance. At 2.4576 MHz, it achieves optimal timing margins and noise performance. Exceeding 2.5 MHz may degrade INL, increase noise, or cause timing violations in serial interface operations - always verify timing compliance using tCLK IN LO/HI specifications from the datasheet.
Does AD7714AN-5 support both unipolar and bipolar input ranges?
Yes, AD7714AN-5 supports both unipolar (0 to +VREF/GAIN) and bipolar (±VREF/GAIN) input ranges. Selection is controlled by the B/U bit in the Filter High register. Unipolar mode uses binary coding; bipolar mode uses offset binary. The reference voltage remains +2.5 V in both cases, and input common-mode range stays AGND to AVDD.
Can AD7714AN-5 operate with a 3.3 V digital supply while using 5 V analog supply?
Yes, AD7714AN-5 supports mixed-supply operation: AVDD = +4.75 V to +5.25 V and DVDD = +3 V to +5.25 V. This allows interfacing with 3.3 V microcontrollers while maintaining full 5 V analog performance. Logic level thresholds (e.g., VINH = 2.0 V min at DVDD = 3.3 V) ensure reliable communication without level shifters.
What is the purpose of the transducer burnout current in AD7714AN-5?
The AD7714AN-5 includes a 1 µA (±10% typ) transducer burnout current source that can be enabled on selected analog inputs to detect open-circuit conditions in 4-wire bridge sensors. When activated, it pulls current through the sensor element; absence of expected voltage indicates wire breakage - enabling fail-safe diagnostics in safety-critical instrumentation.
How does the AD7714AN-5 handle power-down mode, and what is its typical current draw?
AD7714AN-5 enters low-power standby mode when the STANDBY pin is asserted or via software command. In this state, analog and digital sections are disabled except for basic biasing. Typical standby current is 20 µA at +5 V supply, with a maximum of 40 µA - enabling ultra-low-power operation in battery-backed or energy-harvested systems without losing calibration state.
AD7714AN-5 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:
- 5V
- 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-5 FAQ
1.How can I place an order for AD7714AN-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7714AN-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 AD7714AN-5 reliable?
The price and inventory of AD7714AN-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7714AN-5 is usually 5 days.
3.What payment methods are accepted for AD7714AN-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7714AN-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7714AN-5?
AD7714AN-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7714AN-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 AD7714AN-5?
For technical support, including AD7714AN-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7714AN-5 requirements.
6.How does Aetrix verify that AD7714AN-5 is sourced from the original manufacturer or authorized distributors?
All AD7714AN-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 AD7714AN-5 meets industry standards.
7.What is the process for return or replacement of AD7714AN-5?
All AD7714AN-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7714AN-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 AD7714AN-5 part is unused and in its original packaging.
Return procedure for AD7714AN-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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