Overview
The AD7709ARUZ-REEL7, produced by Analog Devices Inc., is a comprehensive analog front-end solution designed for low-frequency measurement applications. This device integrates a 16-bit sigma-delta analog-to-digital converter (ADC) with a programmable gain amplifier (PGA), making it suitable for a wide range of input signal types. The AD7709 can be configured as two fully differential input channels or four pseudo-differential input channels, allowing direct conversion of signals from transducers without the need for additional signal conditioning.
Key Specifications
| Parameter | Value | Unit | Test Conditions |
|---|---|---|---|
| Resolution | 16 Bits | - | - |
| Output Update Rate | 5.4 Hz min to 105 Hz max | Hz | VDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = GND |
| Input Range | 20 mV to 2.56 V | V | - |
| Supply Voltage | 3 V or 5 V | V | - |
| Power Dissipation (at 3 V) | 3.75 mW | mW | - |
| Package Type | 24-Lead TSSOP | - | - |
| Input Currents (except XTAL) | ±2 mA max | mA | VIN = VDD or GND |
| Output High Voltage (at 3 V) | VDD - 0.6 V min | V | ISOURCE = 100 mA |
| Output Low Voltage (at 3 V) | 0.4 V max | V | ISINK = 100 mA |
Key Features
- 16-bit sigma-delta ADC with PGA for high resolution and accuracy.
- Configurable as two fully differential input channels or four pseudo-differential input channels.
- Three software-configurable, ratioed current sources.
- Switchable reference inputs for flexibility in measurement setups.
- Low-side power switches for controlling external devices.
- A 4-bit digital I/O port for additional control and communication.
- Direct conversion of signals from transducers without additional signal conditioning.
- On-chip digital filter with programmable cutoff and output update rate.
- Single supply operation at 3 V or 5 V.
Applications
The AD7709ARUZ-REEL7 is ideal for various low-frequency measurement applications, including:
- Industrial process control and monitoring.
- Medical devices such as patient monitoring systems and diagnostic equipment.
- Automotive systems requiring precise analog-to-digital conversion.
- Environmental monitoring and data acquisition systems.
- Test and measurement instruments.
Q & A
- What is the resolution of the AD7709ARUZ-REEL7?
The AD7709ARUZ-REEL7 has a resolution of 16 bits. - What are the input channel configurations available for the AD7709?
The device can be configured as two fully differential input channels or four pseudo-differential input channels. - What is the input signal range for the AD7709?
The input signal range is from 20 mV to 2.56 V. - What are the supply voltage options for the AD7709?
The device operates from a single 3 V or 5 V supply. - How much power does the AD7709 dissipate when operating at 3 V?
The power dissipation is 3.75 mW when operating at 3 V. - What type of package does the AD7709ARUZ-REEL7 come in?
The device is housed in a 24-lead TSSOP package. - Does the AD7709 require external signal conditioning for transducer signals?
No, the AD7709 can convert signals directly from transducers without the need for additional signal conditioning. - What features does the AD7709 have for controlling external devices?
The device includes low-side power switches and three software-configurable current sources. - Is the AD7709 suitable for high-frequency applications?
No, the AD7709 is designed for low-frequency measurement applications. - How can the output update rate of the AD7709 be adjusted?
The output update rate can be adjusted via the on-chip control register, allowing programming of the digital filter cutoff.
