Overview
The MX7705EWE+ is a 16-bit, low-power, 2-channel, sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is designed for high precision and low power consumption, making it ideal for applications requiring accurate measurement of low-frequency signals. The MX7705 is pin compatible and software compatible with the AD7705, ensuring ease of integration into existing systems. It features an on-chip input buffer and a programmable-gain amplifier (PGA), along with a digital filter that provides excellent noise rejection and signal processing capabilities.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 16-bit | |
| Number of Channels | 2 | |
| Supply Voltage | 2.7V to 5.25V | |
| Supply Current | 320µA (typ) at 3V | |
| Power-Down Current | 2µA (typ) | |
| Integral Nonlinearity (INL) | ±0.003% FSR | |
| Noise | 650nV | |
| PGA Gain Range | 1 to 128 | |
| Serial Interface | SPI-/QSPI-/MICROWIRE-compatible | |
| Package Type | 16-pin TSSOP, 16-pin SOIC |
Key Features
- On-chip input buffer and programmable-gain amplifier (PGA) from 1 to 128.
- Excellent DC performance with ±0.003% FSR INL and low noise of 650nV.
- Self-calibration and system calibration to correct for gain and offset errors.
- SPI-/QSPI-/MICROWIRE-compatible 3-wire serial interface.
- Internal digital filter with programmable cutoff and output data rate.
- High rejection of common-mode and normal-mode 50Hz or 60Hz noise.
- Low power consumption with a maximum of 1mW at 3V supply.
- Power-down mode reducing supply current to 2µA (typ).
Applications
The MX7705EWE+ is suitable for a variety of applications requiring precise measurement of low-frequency signals, including:
- Industrial automation and control systems.
- Medical devices and diagnostic equipment.
- Test and measurement instruments.
- Automotive systems requiring high accuracy and low power consumption.
- Data acquisition systems in various industries.
Q & A
- What is the resolution of the MX7705EWE+ ADC?
The MX7705EWE+ has a 16-bit resolution with no missing codes.
- How many channels does the MX7705EWE+ support?
The device supports 2 fully differential input channels.
- What is the supply voltage range for the MX7705EWE+?
The device operates from a single 2.7V to 5.25V supply.
- What is the typical supply current of the MX7705EWE+ at 3V supply?
The typical supply current is 320µA at 3V supply.
- What is the power-down current of the MX7705EWE+?
The power-down current is 2µA (typ).
- What is the integral nonlinearity (INL) of the MX7705EWE+?
The INL is ±0.003% FSR.
- Does the MX7705EWE+ have an internal digital filter?
Yes, it has an internal digital filter with programmable cutoff and output data rate.
- What type of serial interface does the MX7705EWE+ support?
The device supports SPI-/QSPI-/MICROWIRE-compatible 3-wire serial interface.
- What are the package options for the MX7705EWE+?
The device is available in 16-pin TSSOP and 16-pin SOIC packages.
- Is the MX7705EWE+ compatible with other ADC models?
Yes, it is pin compatible and software compatible with the AD7705.
