Overview
The AD7714ANZ-3, produced by Analog Devices Inc., is a comprehensive analog front end designed for low-frequency measurement applications. This device employs a sigma-delta conversion technique, offering up to 24 bits of no missing codes performance. It features a programmable gain front end, allowing it to handle low-level signals directly from transducers and output a serial digital word. The AD7714ANZ-3 operates from a single supply voltage of either 3 V or 5 V and is suitable for use in smart, microcontroller- or DSP-based systems.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Sampling Rate | 19.2 ksps |
| Number of Inputs | 5 (configurable as 3 differential or 5 pseudo-differential) |
| Input Type | Differential, Pseudo-Differential |
| Data Interface | SPI, QSPI, MICROWIRE, DSP Compatible |
| Supply Voltage | 3 V (AD7714-3) or 5 V (AD7714-5) |
| Current Consumption | 350 μA (typ), 5 μA (power-down) |
| Operating Temperature | -40°C to +105°C |
| Package | 24-Lead TSSOP, 24-Pin PDIP |
| Nonlinearity | 0.0015% |
| Noise | < 150 nV rms |
Key Features
- Charge Balancing ADC with 24 bits of no missing codes performance
- Programmable gain front end with gains from 1 to 128
- Three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP
- Low noise and low current consumption with power-down mode
- Self-calibration, system calibration, and background calibration options
- Ability to read and write calibration coefficients
- Programmable low-pass filter with adjustable filter cutoffs
- CMOS construction for low power dissipation
Applications
- Portable industrial instruments
- Portable weigh scales
- Loop-powered systems
- Pressure transducers
- Temperature measurement using thermocouples
Q & A
- What is the resolution of the AD7714ANZ-3?
The AD7714ANZ-3 has a resolution of 24 bits.
- What are the possible supply voltages for the AD7714ANZ-3?
The device can operate from either 3 V or 5 V supply voltage.
- How many analog inputs does the AD7714ANZ-3 have?
The AD7714ANZ-3 has five analog inputs, which can be configured as three fully differential or five pseudo-differential inputs.
- What is the typical current consumption of the AD7714ANZ-3?
The typical current consumption is 350 μA, with a power-down mode of 5 μA.
- What is the operating temperature range of the AD7714ANZ-3?
The operating temperature range is from -40°C to +105°C.
- Does the AD7714ANZ-3 support calibration?
Yes, it supports self-calibration, system calibration, and background calibration.
- What type of data interface does the AD7714ANZ-3 use?
The device uses a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Can the AD7714ANZ-3 handle bipolar analog input ranges?
Yes, it can handle bipolar analog input ranges with respect to a biased-up differential input.
- What is the nonlinearity of the AD7714ANZ-3?
The nonlinearity is 0.0015%.
- What is the typical noise level of the AD7714ANZ-3?
The typical noise level is less than 150 nV rms.
