Overview
The ADS7816E/2K5G4 is a 12-bit, high-speed, micro-power sampling analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS7816 series and is known for its low power consumption and high sampling rate. The ADS7816E/2K5G4 uses a successive approximation register (SAR) architecture based on capacitive redistribution, which includes a sample/hold function. It operates on a single +5V power source and requires an external reference voltage and an external clock signal.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| No Missing Codes | 11 | 12 | 12 | Bits | |
| Integral Linearity Error | ±0.5 | ±2 | ±0.5 | LSB | |
| Differential Linearity Error | ±0.5 | ±2 | ±0.25 | LSB | |
| Offset Error | ±4 | ±4 | LSB | ||
| Gain Error | ±4 | ±4 | LSB | ||
| Noise | 33 | µVrms | |||
| Sampling Rate | fCLK = 16 • fSAMPLE | 200kHz | |||
| Power Supply Voltage | 4.75 | 5 | 5.25 | V | |
| Quiescent Current | fCLK = 3.2MHz | 225 | 320 | µA | |
| Power Dissipation | fCLK = 3.2MHz | 675 | 1000 | µW | |
| Analog Input Full-Scale Span | 0 | VREF | V | ||
| Analog Input Capacitance | 25 | pF | |||
| Analog Input Leakage Current | ±1 | µA |
Key Features
- High-Speed Sampling: The ADS7816E/2K5G4 can sample at rates up to 200kHz.
- Low Power Consumption: The device operates in a low power mode, making it suitable for battery-operated systems.
- Successive Approximation Register (SAR) Architecture: Based on capacitive redistribution, this architecture includes a sample/hold function.
- External Reference and Clock: Requires an external reference voltage and an external clock signal.
- Differential Input: The device supports differential input signals through the +In and –In pins.
- Automatic Power Down: The device features automatic power down to conserve power when not in use.
- Serial Data Output: The digital result is clocked out serially, most significant bit first, on the DOUT pin.
Applications
- Data Acquisition Systems: Suitable for high-speed data acquisition in various industrial and medical applications.
- Remote Sensing: Ideal for remote sensing applications due to its low power consumption and high sampling rate.
- Embedded Systems: Can be used in embedded systems requiring precise analog-to-digital conversion.
- Industrial Automation: Used in industrial automation for monitoring and controlling various parameters.
- Medical Devices: Suitable for medical devices that require high accuracy and low power consumption.
Q & A
- What is the resolution of the ADS7816E/2K5G4?
The resolution of the ADS7816E/2K5G4 is 12 bits. - What is the maximum sampling rate of the ADS7816E/2K5G4?
The maximum sampling rate is up to 200kHz. - What type of architecture does the ADS7816E/2K5G4 use?
The device uses a successive approximation register (SAR) architecture based on capacitive redistribution. - What is the power supply voltage requirement for the ADS7816E/2K5G4?
The power supply voltage requirement is between 4.75V and 5.25V. - Does the ADS7816E/2K5G4 have automatic power down?
Yes, the device features automatic power down to conserve power when not in use. - How is the digital data output from the ADS7816E/2K5G4?
The digital data is clocked out serially, most significant bit first, on the DOUT pin. - What is the typical quiescent current of the ADS7816E/2K5G4?
The typical quiescent current is 225µA at a clock frequency of 3.2MHz. - Can the ADS7816E/2K5G4 handle differential input signals?
Yes, the device supports differential input signals through the +In and –In pins. - What is the range of the external reference voltage for the ADS7816E/2K5G4?
The external reference voltage can be any voltage between 100mV and VCC. - Is the ADS7816E/2K5G4 suitable for battery-operated systems?
Yes, the device is suitable for battery-operated systems due to its low power consumption.
