Overview
The AD7711ARZ is a 24-bit sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. It is designed as a complete analog front end for low-frequency measurement applications, particularly suitable for use in smart, microcontroller-based systems. The device can accept low-level signals directly from a transducer and output a serial digital word. It features a proprietary programmable gain front end and an on-chip digital filter, allowing for adjustable filter cutoff and settling times.
The AD7711ARZ is available in a 24-pin, 0.3 inch wide, plastic and hermetic dual-in-line package (DIP) as well as a 24-lead small outline (SOIC) package, ensuring low power dissipation and a software-programmable power-down mode that reduces standby power consumption to 7 mW typical.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Bits | 24 |
| Architecture | Sigma-Delta |
| Sampling Rate | Up to 19.5 kSPS |
| Number of Inputs | 2 (1 differential, 1 single-ended) |
| Input Type | Differential and Single-Ended |
| Data Interface | SPI |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 5 V ~ 10 V |
| Voltage - Supply, Digital | 5 V |
| Package | 24-SOIC (0.295", 7.50mm Width) |
Key Features
- Programmable gain front end with adjustable filter cutoff and settling times.
- On-chip digital filter with programmable notch.
- Two current sources for RTD excitation in three-wire and four-wire configurations.
- Self-measurement calibration, system calibration, and background calibration options.
- Software programmable power-down mode reducing standby power consumption to 7 mW typical.
- CMOS construction ensuring low power dissipation.
- Bidirectional serial port for configuring gain settings, signal polarity, input channel selection, and RTD current control.
Applications
The AD7711ARZ is ideal for various low-frequency measurement applications, including:
- Smart, microcontroller-based systems.
- Temperature measurement using RTDs.
- Industrial process control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Automotive and aerospace applications where high precision and reliability are crucial.
Q & A
- What is the resolution of the AD7711ARZ ADC?
The AD7711ARZ has a 24-bit resolution.
- What is the architecture of the AD7711ARZ?
The AD7711ARZ uses a sigma-delta conversion technique.
- How many analog input channels does the AD7711ARZ have?
The AD7711ARZ has two analog input channels: one differential and one single-ended.
- What is the data interface of the AD7711ARZ?
The AD7711ARZ uses an SPI (Serial Peripheral Interface) for data communication.
- Can the AD7711ARZ be powered from a single supply?
- What are the package options for the AD7711ARZ?
The AD7711ARZ is available in 24-pin SOIC (Small Outline IC) and 24-pin DIP (Dual In-Line Package) options.
- Does the AD7711ARZ support calibration?
- How does the AD7711ARZ manage power consumption?
The AD7711ARZ has a software-programmable power-down mode that reduces standby power consumption to 7 mW typical.
- What are the typical applications of the AD7711ARZ?
The AD7711ARZ is commonly used in smart, microcontroller-based systems, temperature measurement, industrial process control, medical devices, and automotive and aerospace applications.
- Can the AD7711ARZ be used with RTDs?
