TM7705 16-Bit A/D Conversion Chip for Low-Frequency Measurement and Industrial Control
The TM7705 is a high-performance 16-bit A/D converter, designed primarily for low-frequency measurement applications. It efficiently converts small sensor signals into digital values, making it ideal for various industrial and instrumentation control systems. The chip features two fully differential input channels, SPI 3-wire serial communication, and built-in self-calibration functions to minimize system errors, offering excellent noise immunity, low power consumption, and high accuracy.
Key Features
- Dual Fully Differential ADC Channels: Provides high precision for low-frequency measurements.
- 16-Bit Σ-Δ Conversion: Offers high-resolution data conversion with no missing codes.
- Low Integral Nonlinearity: Less than 0.003%, ensuring accuracy in measurements.
- Programmable Gain: Configurable gain from 1 to 128, for optimal signal amplification.
- SPI 3-Wire Serial Communication: Ensures fast and efficient data transfer.
- Buffered Analog Inputs: Capable of buffering analog input signals for improved accuracy.
- Low Power Consumption: Maximum power consumption is just 1mW at 3V with low current in power-down mode (8μA).
- Flexible Operating Voltage: Supports 3V or 5V power supply, with a tolerance of ±5%.
- Multiple Package Options: Available in DIP16, SOIC, TSSOP, and SOP packages for easy integration.
Feature Comparison Table
| Feature | TM7705 | Industry Standard Equivalent |
|---|---|---|
| Resolution | 16-Bit | Typically 12-14 Bit |
| Input Channels | Dual Fully Differential Channels | Usually Single or Dual |
| Communication Interface | SPI 3-Wire | I2C or Parallel |
| Gain Range | Programmable Gain 1 to 128 | Limited Gain Range |
| Power Consumption | 1mW at 3V, Power-Down Mode: 8μA | Typically higher consumption |
| Nonlinearity | Integral Nonlinearity < 0.003% | Usually > 0.01% |
| Package Options | DIP16, SOIC, TSSOP, SOP | Limited to SOP or TSSOP |
Applications of TM7705
- Instrumentation Measurement: Suitable for high-precision measurement systems in laboratories and testing environments.
- Industrial Control: Used in control systems requiring high accuracy and low power consumption for process control.
- Sensor Interface: Ideal for interfacing with low-frequency sensors in various industrial and automation systems.
- Low-Frequency Signal Processing: Provides accurate digital conversion of analog signals for low-frequency applications.
Why Choose TM7705?
The TM7705 offers an ideal solution for low-frequency measurement applications that require high accuracy, programmable gain, and low power consumption. Its dual differential input channels, excellent noise rejection, and high-resolution conversion make it perfect for industrial and instrumentation systems, while the low power consumption ensures efficiency in battery-operated designs.
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