Overview
The ADS7841E/2K5, produced by Texas Instruments, is a 12-bit, 4-channel sampling Analog-to-Digital Converter (ADC) with a synchronous serial interface. This device is designed for high-speed and low-power applications, making it ideal for battery-operated systems, personal digital assistants, and various measurement equipment. The ADS7841 operates on a single supply voltage ranging from 2.7V to 5V and features a programmable resolution of either 8 bits or 12 bits. It includes a built-in multiplexer and sample-and-hold function, and it supports both single-ended and differential input modes.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Bits | Resolution of the ADC | 12 bits (programmable to 8 bits) |
| Number of Inputs | Number of analog input channels | 4 channels (single-ended or 2-channel differential) |
| Sampling Rate | Maximum conversion rate | Up to 200 kHz |
| Input Type | Type of analog input | Single-ended or differential |
| Data Interface | Type of data interface | SPI (synchronous serial interface) |
| Architecture | Type of ADC architecture | SAR (Successive Approximation Register) |
| Reference Type | Type of reference voltage | External (100mV to VCC) |
| Supply Voltage | Operating voltage range | 2.7V to 5V |
| Operating Temperature | Temperature range for operation | –40°C to +125°C |
| Package | Type of package | 16-SSOP (0.154", 3.90mm Width) |
Key Features
- Single supply operation: 2.7V to 5V
- 4-channel single-ended or 2-channel differential input
- Up to 200 kHz conversion rate
- ±1 LSB maximum integral linearity error (INL) and differential linearity error (DNL)
- No missing codes
- 72 dB SINAD (Signal-to-Noise and Distortion Ratio)
- Synchronous serial interface
- Shutdown mode reducing power dissipation to under 15 µW
- Available in DIP-16 or SSOP-16 package
Applications
- Data acquisition systems
- Test and measurement equipment
- Industrial process control systems
- Personal digital assistants and other portable devices
- Battery-powered systems and measurement equipment
Q & A
- What is the resolution of the ADS7841E/2K5 ADC?
The ADS7841E/2K5 has a programmable resolution of either 8 bits or 12 bits.
- How many analog input channels does the ADS7841E/2K5 have?
The device has 4 analog input channels, which can be configured as single-ended or 2-channel differential inputs.
- What is the maximum conversion rate of the ADS7841E/2K5?
The maximum conversion rate is up to 200 kHz.
- What type of data interface does the ADS7841E/2K5 use?
The device uses a synchronous serial interface (SPI).
- What is the operating voltage range of the ADS7841E/2K5?
The operating voltage range is from 2.7V to 5V.
- What is the temperature range for the operation of the ADS7841E/2K5?
The device operates over a temperature range of –40°C to +125°C.
- What type of package is the ADS7841E/2K5 available in?
The device is available in a 16-SSOP package.
- Does the ADS7841E/2K5 have a shutdown mode?
Yes, the device has a shutdown mode that reduces power dissipation to under 15 µW.
- What are some typical applications of the ADS7841E/2K5?
Typical applications include data acquisition systems, test and measurement equipment, industrial process control systems, personal digital assistants, and battery-powered measurement equipment.
- What is the architecture of the ADS7841E/2K5 ADC?
The device uses a Successive Approximation Register (SAR) architecture.
