Overview
The LTC1290, produced by Analog Devices Inc., is a single-chip 12-bit data acquisition system that integrates a serial I/O successive approximation A/D converter. This component utilizes LTCMOS switched capacitor technology to perform either 12-bit unipolar or 11-bit plus sign bipolar A/D conversions. It features an 8-channel input multiplexer that can be configured for single-ended or differential inputs, and includes an on-chip sample-and-hold for all single-ended input channels. The LTC1290 is designed for low power consumption and can be powered down with a serial word when idle. It is compatible with industry standard full duplex serial interfaces and supports various data word lengths, making it versatile for interfacing with shift registers and different processors.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12 Bits | |
| Conversion Mode | Unipolar/Bipolar | |
| Input Channels | 8 (4 Differential, 8 Single-Ended) | |
| Sample-and-Hold | Built-in for single-ended inputs | |
| Supply Voltage | 5V or ±5V | V |
| Operating Temperature Range | 0°C to 70°C (LTC1290C), -40°C to 85°C (LTC1290I) | °C |
| Maximum Throughput Rate | 50 kHz | Hz |
| Power Consumption | 6.0 mA (typical) | mA |
| Package Options | 20-Lead PDIP, 20-Lead SOIC (Wide) |
Key Features
- Software programmable features for unipolar/bipolar conversion
- Four differential or eight single-ended inputs (or combinations thereof)
- MSB- or LSB-first data sequence
- Variable data word length (8, 12, or 16 bits)
- Power shutdown capability for low power consumption
- Built-in sample-and-hold for all single-ended input channels
- Single supply 5V or ±5V operation
- Direct four-wire interface to most MPU serial ports and all MPU parallel ports
Applications
The LTC1290 is suitable for a variety of applications requiring precise data acquisition and conversion. These include industrial control systems, medical devices, automotive systems, and any application where multiple analog inputs need to be converted into digital data efficiently. Its low power consumption and flexible interface options make it particularly useful in battery-powered devices and systems requiring minimal power usage.
Q & A
- What is the resolution of the LTC1290 A/D converter?
The LTC1290 has a resolution of 12 bits for unipolar conversions and 11 bits plus sign for bipolar conversions.
- How many input channels does the LTC1290 have?
The LTC1290 has 8 input channels, which can be configured as four differential or eight single-ended inputs.
- What are the supply voltage options for the LTC1290?
The LTC1290 can operate on either a single 5V supply or a ±5V supply.
- What is the maximum throughput rate of the LTC1290?
The maximum throughput rate of the LTC1290 is 50 kHz.
- Can the LTC1290 be powered down to save power?
- What types of packages are available for the LTC1290?
The LTC1290 is available in 20-Lead PDIP and 20-Lead SOIC (Wide) packages.
- Is the LTC1290 compatible with standard serial interfaces?
- What is the typical power consumption of the LTC1290?
- Does the LTC1290 have built-in sample-and-hold capability?
- What are the operating temperature ranges for the LTC1290?
