Features and Benefits
- 400ksps per Channel Throughput
- Four Simultaneous Sampling Channels
- ±4LSB INL (Maximum, ±4.096V Range)
- Guaranteed 18-Bit, No Missing Codes
- Differential, Wide Common Mode Range Inputs
- Per-Channel SoftSpan Input Ranges:
- ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V
- ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
- 95dB Single-Conversion SNR (Typical)
- −114dB THD (Typical) at fIN = 2kHz
- 102dB CMRR (Typical) at fIN = 200Hz
- Rail-to-Rail Input Overdrive Tolerance
- Guaranteed Operation to 125°C
- Integrated Reference and Buffer (4.096V)
- SPI CMOS (1.8V to 5V) and LVDS Serial I/O
- Internal Conversion Clock, No Cycle Latency
- 81mW Power Dissipation (Typical)
- 32-Lead (5mm × 5mm) QFN Package
The LTC2344-18 is an 18-bit, low noise 4-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V supply and using the internal reference and buffer, each channel of this SoftSpan™ ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. Individual channels may also be disabled to increase throughput on the remaining channels.
The wide input common mode range and 102dB CMRR of the LTC2344-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±4LSB INL, no missing codes at 18 bits, and 95dB SNR, makes the LTC2344-18 an ideal choice for many applications requiring wide dynamic range.
The LTC2344-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and four lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput.
- Programmable Logic Controllers
- Industrial Process Control
- Medical Imaging
- High Speed Data Acquisition
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 2520A shows the proper way to drive the LTC2344 ADC. The LTC2344 is a low noise, high speed, simultaneous sampling 16-/18-bit successive approximation register (SAR) ADC. The LTC2344 has a flexible SoftSpan™ interface that allows conversion-by-conversion control of the input voltage span on a per-channel basis. An internal 2.048V reference and 2× buffer simplify basic operation while an external reference can be used to increase the input range and the SNR of the ADC.
Software & Systems Requirements
Tools & Simulations
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Sample & Buy
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