Overview
The ADS7818E/2K5, produced by Texas Instruments, is a 12-bit high-speed, low-power sampling analog-to-digital converter (A/D). It features an internal 2.5V reference, sample/hold circuitry, and a synchronous serial interface. This device 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 ADS7818E/2K5 operates over a temperature range of –40°C to +85°C and is available in plastic mini-DIP-8 or MSOP-8 packages.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits |
| Integral Linearity Error | ±0.5 | ±1 | ±2 | LSB |
| Differential Linearity Error | ±0.5 | ±0.8 | ±1 | LSB |
| Offset Error | ±1 | ±2 | ±5 | LSB |
| Gain Error (25°C) | ±7 | ±12 | ±15 | LSB |
| Conversion Time | 1.625 | µs | ||
| Acquisition Time | 0.350 | µs | ||
| Throughput Rate | 500 | kHz | ||
| Power Supply Voltage | 4.75 | 5.0 | 5.25 | V |
| Quiescent Current (fSAMPLE = 500kHz) | 2.2 | mA | ||
| Power Dissipation (fSAMPLE = 500kHz) | 11 | mW | ||
| Power Down Current | 0.5 | mA | ||
| Power Down Dissipation | 2.5 | mW | ||
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- 12-bit resolution with no missing codes.
- Internal 2.5V reference voltage, which can be overdriven by an external reference.
- High-speed conversion rate up to 500 kHz.
- Low power consumption: 11 mW at 500 kHz throughput rate and 2.5 mW in power-down mode.
- Synchronous serial interface for data transfer.
- Sample/hold circuitry integrated.
- Small package options: plastic mini-DIP-8 or MSOP-8.
- Operating temperature range: –40°C to +85°C.
- Low-cost isolation for remote data acquisition.
Applications
- Battery-operated systems.
- Wireless communication devices.
- Portable multi-channel data loggers.
- Spectrum analyzers.
- Remote data acquisition systems.
Q & A
- What is the resolution of the ADS7818E/2K5?
The ADS7818E/2K5 has a 12-bit resolution.
- What is the typical power dissipation of the ADS7818E/2K5 at 500 kHz throughput rate?
The typical power dissipation is 11 mW at a 500 kHz throughput rate.
- Can the internal reference voltage be overdriven by an external voltage?
- What is the operating temperature range of the ADS7818E/2K5?
The operating temperature range is –40°C to +85°C.
- What are the package options available for the ADS7818E/2K5?
The device is available in plastic mini-DIP-8 or MSOP-8 packages.
- How does the power-down mode affect the device's power consumption?
In power-down mode, the power consumption is reduced to 2.5 mW.
- What is the maximum throughput rate of the ADS7818E/2K5?
The maximum throughput rate is 500 kHz.
- What type of serial interface does the ADS7818E/2K5 use?
The device uses a synchronous serial interface for data transfer.
- Is the ADS7818E/2K5 suitable for battery-operated systems?
- How is the data format of the ADS7818E/2K5 output?
The output data is in straight binary format.
