Overview
The MX7705 is a low-power, 2-channel, serial-output analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device features a sigma-delta modulator with a digital filter, achieving 16-bit resolution with no missing codes. It is pin compatible and software compatible with the AD7705, making it a versatile option for various applications. The MX7705 includes an on-chip input buffer and a programmable-gain amplifier (PGA), and it operates from a single 2.7V to 5.25V supply.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Channels | 2 |
| Input Type | Fully differential bipolar/unipolar |
| Supply Voltage | 2.7V to 5.25V |
| Supply Current | 320µA (typ) at 3V supply |
| Power-Down Current | 2µA (typ) |
| Integral Nonlinearity (INL) | ±0.003% FSR |
| Noise | 650nV |
| Common-Mode Noise Rejection | 150dB at 50Hz/60Hz |
| Normal-Mode Noise Rejection | 98dB at 50Hz/60Hz |
| Package | 16-pin TSSOP |
Key Features
- Sigma-delta modulator with a digital filter for high resolution and low noise.
- On-chip input buffer and programmable-gain amplifier (PGA) for flexible signal conditioning.
- Self-calibration and system calibration to correct for gain and offset errors.
- Programmable cutoff and output data rate of the digital filter.
- SPI-/QSPI-/MICROWIRE-compatible serial interface.
- Low power consumption with a power-down mode.
Applications
The MX7705 is ideal for measuring low-frequency signals with a wide dynamic range, making it suitable for various applications such as industrial process control, medical devices, and precision measurement systems. Its low power consumption and high accuracy also make it a good choice for battery-powered devices and systems requiring high reliability.
Q & A
- What is the resolution of the MX7705 ADC?
The MX7705 has a 16-bit resolution. - How many channels does the MX7705 support?
The MX7705 supports 2 channels. - What is the supply voltage range for the MX7705?
The MX7705 operates from a single 2.7V to 5.25V supply. - What is the typical supply current of the MX7705 at 3V supply?
The typical supply current is 320µA at 3V supply. - What is the power-down current of the MX7705?
The power-down current is 2µA (typ). - What type of input signals does the MX7705 accept?
The MX7705 accepts fully differential bipolar/unipolar input signals. - Does the MX7705 have built-in calibration features?
Yes, the MX7705 features self-calibration and system calibration to correct for gain and offset errors. - What is the noise performance of the MX7705?
The MX7705 has a noise level of 650nV. - What is the common-mode noise rejection of the MX7705?
The MX7705 provides 150dB rejection of common-mode 50Hz or 60Hz noise. - What package options are available for the MX7705?
The MX7705 is available in a 16-pin TSSOP package.
