Overview
The AD7714YRZ, produced by Analog Devices Inc., is a 24-bit sigma-delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device serves as a complete analog front end, capable of accepting low-level signals directly from transducers and outputting a serial digital word. It employs a sigma-delta conversion technique to achieve up to 24 bits of no missing codes performance. The AD7714YRZ operates from a single supply voltage of either 3 V or 5 V and is available in various packages, including 24-lead SOIC, SSOP, and TSSOP.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Input Channels | Three differential or five pseudo-differential |
| Programmable Gain | 1 to 128 |
| Supply Voltage | 2.7 V to 3.3 V or 4.75 V to 5.25 V |
| Operating Temperature | -40°C to +105°C |
| Current Consumption | 350 µA (typ) at 3 V, 1 mA (typ) at 5 V |
| Power-Down Current | 5 µA (typ) at 3 V, 15 µW (typ) at 3 V |
| Noise | <150 nV rms |
| Interface | Three-wire serial (SPI, QSPI, MICROWIRE, DSP compatible) |
| Package | 24-lead SOIC, SSOP, TSSOP |
Key Features
- Charge balancing ADC with no missing codes and 0.0015% nonlinearity.
- Programmable gain front end with gains from 1 to 128.
- Three differential analog inputs or five pseudo-differential inputs, along with a differential reference input.
- Low noise and low current consumption, making it suitable for loop-powered systems.
- Three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Schmitt trigger on SCLK and DIN inputs for the Y grade.
- Self-calibration, system calibration, and background calibration options.
- Ability to read and write calibration coefficients.
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 AD7714YRZ?
The AD7714YRZ has a resolution of 24 bits.
- What are the input channel configurations of the AD7714YRZ?
The device can be configured as three differential or five pseudo-differential analog inputs.
- What is the programmable gain range of the AD7714YRZ?
The programmable gain range is from 1 to 128.
- What are the operating voltage and temperature ranges of the AD7714YRZ?
The operating voltage range is 2.7 V to 3.3 V or 4.75 V to 5.25 V, and the temperature range is -40°C to +105°C.
- What is the typical current consumption of the AD7714YRZ?
The typical current consumption is 350 µA at 3 V and 1 mA at 5 V.
- What interface does the AD7714YRZ use?
The device uses a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- What are some key applications of the AD7714YRZ?
Key applications include portable industrial instruments, portable weigh scales, loop-powered systems, and pressure transducers.
- Does the AD7714YRZ support calibration options?
Yes, it supports self-calibration, system calibration, and background calibration options.
- Can the AD7714YRZ operate in power-down mode?
Yes, it has a power-down mode that reduces standby power consumption to 15 µW typical at 3 V.
- What packages are available for the AD7714YRZ?
The device is available in 24-lead SOIC, SSOP, and TSSOP packages.
