Overview
The ADS7835EB/250 is a 12-bit, high-speed, low-power sampling analog-to-digital converter (A/D) produced by Texas Instruments. This device is equipped with a sample-and-hold (S/H) function, an internal 2.5V reference, and a synchronous serial interface. It is designed for low power consumption, making it ideal for battery-operated systems such as wireless communication devices, portable multi-channel data loggers, and spectrum analyzers. The ADS7835EB/250 operates over a temperature range of –40°C to +85°C and is available in an 8-pin MSOP package.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 | Bits | ||
| Input Voltage Range | –VREF | +VREF | V | |
| Input Resistance During Conversion | 2kΩ | |||
| Integral Linearity | ±1 | ±2 | ±0.5 | LSB |
| Differential Linearity | ±0.8 | ±0.5 | ±1 | LSB |
| Power Supply Voltage | 4.75 | 5 | 5.25 | V |
| Quiescent Current | 3.5 | mA | ||
| Power Dissipation | 17.5 | 30 | mW | |
| Power-Down Supply Current | 0.5 | mA | ||
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- 12-bit resolution with no missing codes.
- High-speed operation with a sampling rate of up to 500kHz.
- Low power consumption: 17.5mW at 500kHz throughput rate and 2.5mW in power-down mode.
- Internal 2.5V reference with the option to use an external reference (2.3V to 2.9V).
- Synchronous serial interface (SPI-compatible).
- True bipolar input range of ±2.5V when using the internal reference.
- Small package size: 8-pin MSOP.
- Operating temperature range: –40°C to +85°C.
Applications
The ADS7835EB/250 is suitable for various applications requiring high-speed, low-power analog-to-digital conversion. These include:
- Battery-operated systems such as wireless communication devices.
- Portable multi-channel data loggers.
- Spectrum analyzers.
- Remote data acquisition systems where low-cost isolation is necessary.
Q & A
- What is the resolution of the ADS7835EB/250?
The ADS7835EB/250 has a 12-bit resolution. - What is the maximum sampling rate of the ADS7835EB/250?
The maximum sampling rate is 500kHz. - What is the power consumption of the ADS7835EB/250 at 500kHz throughput rate?
The power consumption is 17.5mW at 500kHz throughput rate. - Can the ADS7835EB/250 be powered down to reduce power consumption?
Yes, the device can be placed into a power-down mode which reduces power dissipation to 2.5mW. - What is the input voltage range when using the internal reference?
The input voltage range is ±2.5V when using the internal reference. - What type of serial interface does the ADS7835EB/250 use?
The device uses a synchronous serial interface (SPI-compatible). - What is the operating temperature range of the ADS7835EB/250?
The operating temperature range is –40°C to +85°C. - Can the ADS7835EB/250 use an external reference voltage?
Yes, the device can operate with an external reference voltage in the range of 2.3V to 2.9V. - What package type is the ADS7835EB/250 available in?
The device is available in an 8-pin MSOP package. - Is the ADS7835EB/250 suitable for battery-operated systems?
Yes, it is designed for low power consumption, making it ideal for battery-operated systems.
