Overview
The ADS7816PCG4, produced by Texas Instruments, is a 12-bit, high-speed, micro-power sampling analog-to-digital converter (ADC). This device is designed for low power operation and features automatic power down, making it ideal for battery-operated systems or applications where multiple signals need to be acquired simultaneously. The ADS7816 uses a successive approximation register (SAR) architecture based on capacitive redistribution, which includes a sample/hold function, allowing it to convert analog signals at up to 200,000 conversions per second while consuming very little power.
Key Specifications
| Parameter | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| No Missing Codes | 11 | 12 | 12 | Bits | |
| Integral Linearity Error | ±0.5 | ±2 | ±2 | LSB | |
| Differential Linearity Error | ±0.5 | ±2 | ±0.75 | LSB | |
| Offset Error | ±4 | LSB | |||
| Gain Error | ±4 | LSB | |||
| Sampling Rate | 200kHz | ||||
| Reference Voltage Range | 100mV | VCC | V | ||
| Power Supply | +5V | V | |||
| Package Options | 8-pin plastic mini-DIP, 8-lead SOIC, 8-lead MSOP |
Key Features
- Low power operation with automatic power down
- Synchronous serial interface
- Differential input with a range limited to ±200mV for the –In input
- External reference voltage range from 100mV to VCC
- High-speed conversion rate of up to 200kHz
- No missing codes and low integral and differential linearity errors
- Small size and low power dissipation, ideal for battery-operated systems
- Available in 8-pin plastic mini-DIP, 8-lead SOIC, and 8-lead MSOP packages
Applications
- Battery-operated systems
- Remote and/or isolated data acquisition
- Systems requiring simultaneous acquisition of multiple signals
- Industrial control and automation
- Medical devices and diagnostic equipment
- Aerospace and defense applications where low power and high accuracy are critical
Q & A
- What is the resolution of the ADS7816PCG4?
The ADS7816PCG4 has a resolution of 12 bits.
- What is the maximum sampling rate of the ADS7816PCG4?
The maximum sampling rate is up to 200kHz.
- What is the range of the reference voltage for the ADS7816PCG4?
The reference voltage can range from 100mV to VCC.
- What types of packages are available for the ADS7816PCG4?
The device is available in 8-pin plastic mini-DIP, 8-lead SOIC, and 8-lead MSOP packages.
- How does the power dissipation of the ADS7816PCG4 scale?
The power dissipation scales directly with the conversion rate.
- What is the significance of the differential input in the ADS7816PCG4?
The differential input allows for rejecting small common-mode signals and is best used to sense a remote signal ground that may move slightly with respect to the local ground potential.
- How does the ADS7816PCG4 handle power down mode?
The device enters power down mode when the conversion is complete and whenever the digital section is powered down with CS HIGH.
- What is the effect of reducing the reference voltage on the ADS7816PCG4?
Reducing the reference voltage reduces the analog voltage weight of each digital output code, increases the apparent offset and gain error, and increases noise.
- Can the ADS7816PCG4 be short cycled to save power?
Yes, the conversion can be terminated at any time to save power, a process known as short cycling.
- What are the implications of noise and voltage variation on the reference input?
Noise and voltage variation on the reference input will appear directly in the digital results, and high-frequency noise can be filtered out.
