Overview
The AD7714ARS-3 is a 24-bit sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed as a complete analog front end for low-frequency measurement applications. It accepts low-level signals directly from transducers and outputs a serial digital word. The AD7714 employs a sigma-delta conversion technique to achieve up to 24 bits of no missing codes performance. It operates from a single supply voltage of 3 V and is available in a 28-lead SSOP package.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Number of Bits | 24 | - | No missing codes |
| Number of Inputs | 3, 5 | - | Differential, Pseudo-Differential |
| Input Type | Differential, Pseudo-Differential | - | - |
| Supply Voltage (Analog) | 3 V ~ 3.6 V | V | - |
| Supply Voltage (Digital) | 3 V ~ 5.25 V | V | - |
| Operating Temperature | -40°C ~ 85°C | °C | - |
| Sampling Rate | 1 ksamples/s | samples/s | - |
| Package Type | 28-SSOP | - | 0.209" (5.30mm) Width |
| Data Interface | SPI, DSP | - | - |
| Power Consumption (Typical) | 350 μA (active), 5 μA (power-down) | μA | - |
Key Features
- 24-bit sigma-delta ADC with no missing codes performance.
- Programmable gain front end with gains from 1 to 128.
- Three differential or five pseudo-differential analog inputs.
- Low noise (<150 nV rms) and low current consumption (350 μA typical).
- Power-down mode reducing standby power to 5 μA typical.
- Three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Self-calibration, system calibration, and background calibration options.
- Ability to read and write calibration coefficients.
- Low-pass filter with programmable filter cutoffs.
- CMOS construction ensuring low power dissipation.
Applications
- Portable industrial instruments.
- Portable weigh scales.
- Loop-powered systems.
- Pressure transducers.
- Smart, microcontroller- or DSP-based systems.
Q & A
- What is the resolution of the AD7714ARS-3 ADC?
The AD7714ARS-3 has a 24-bit resolution with no missing codes performance.
- What are the input types supported by the AD7714ARS-3?
The AD7714ARS-3 supports both differential and pseudo-differential analog inputs.
- What is the supply voltage range for the AD7714ARS-3?
The supply voltage range is 3 V to 5.25 V for digital and 3 V to 3.6 V for analog.
- What is the operating temperature range of the AD7714ARS-3?
The operating temperature range is -40°C to 85°C.
- What data interfaces are supported by the AD7714ARS-3?
The AD7714ARS-3 supports SPI, QSPI, MICROWIRE, and DSP interfaces.
- What is the typical power consumption of the AD7714ARS-3?
The typical power consumption is 350 μA in active mode and 5 μA in power-down mode.
- Does the AD7714ARS-3 support calibration options?
Yes, it supports self-calibration, system calibration, and background calibration options.
- Can the AD7714ARS-3 be used in loop-powered systems?
Yes, it is suitable for use in loop-powered systems.
- What package types are available for the AD7714ARS-3?
The AD7714ARS-3 is available in a 28-lead SSOP package.
- Is the AD7714ARS-3 RoHS compliant?
Yes, the AD7714ARS-3 is RoHS compliant.
