LTC2357-18
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LTC2357-18

Buffered Quad, 18-Bit, 350ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 3
1ku List Price Starting From $24.08
Features
  • Simultaneous Sampling of 4 Buffered Channels
  • 350ksps per Channel Throughput
  • 500pA/12nA Max Input Leakage at 85°C/125°C
  • ±3.5LSB INL (Maximum, ±10.24V Range)
  • Guaranteed 18-Bit, No Missing Codes
  • , Wide Common Mode Range Inputs
  • Per-Channel SoftSpan Input Ranges:
    • ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V
    • ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V
  • 96.4dB Single-Conversion SNR (Typical)
  • −110dB THD (Typical) at fIN = 2kHz
  • 128dB CMRR (Typical) at fIN = 200Hz
  • Rail-to-Rail Input Overdrive Tolerance
  • Integrated Reference and Buffer (4.096V)
  • SPI CMOS (1.8V to 5V) and LVDS Serial I/O
  • Internal Conversion Clock, No Cycle Latency
  • 175mW Power Dissipation (44mW/Ch Typical)
  • 48-Lead (7mm x 7mm) LQFP Package
Additional Details
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The LTC2357-18 is an 18-bit, low noise 4-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, 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 ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. Individual channels may also be disabled to increase throughput on the remaining channels.

The integrated picoamp-input analog buffers, wide input common mode range and 128dB CMRR of the LTC2357-18 allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3.5LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the LTC2357-18 an ideal choice for many high voltage applications requiring wide dynamic range.

The LTC2357-18 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.

Applications

  • Programmable Logic Controllers
  • Industrial Process Control
  • Power Line Monitoring
  • Test and Measurement
Part Models 3
1ku List Price Starting From $24.08

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2357CLX-18#PBF
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LTC2357HLX-18#PBF
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LTC2357ILX-18#PBF
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Product Lifecycle

PCN

Apr 6, 2021

- 21_0046

Transfer of LQFP and LQFP_EP from AEM to AET

LTC2357CLX-18#PBF

PRODUCTION

LTC2357HLX-18#PBF

PRODUCTION

LTC2357ILX-18#PBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2021

- 21_0046

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Transfer of LQFP and LQFP_EP from AEM to AET

LTC2357CLX-18#PBF

PRODUCTION

LTC2357HLX-18#PBF

PRODUCTION

LTC2357ILX-18#PBF

PRODUCTION

Evaluation Kit

Evaluation Kits 1

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DC2365A-B

LTC2357-18 Demo Board | Buffered Quad, 18-Bit, 350ksps Simultaneous Sampling SAR ADC (Requires DC590, DC2026 or DC890)

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DC2365A-B

LTC2357-18 Demo Board | Buffered Quad, 18-Bit, 350ksps Simultaneous Sampling SAR ADC (Requires DC590, DC2026 or DC890)

LTC2357-18 Demo Board | Buffered Quad, 18-Bit, 350ksps Simultaneous Sampling SAR ADC (Requires DC590, DC2026 or DC890)

Product Detail

Demonstration circuit 2365A highlights the LTC2358 family of buffered input ADCs. The LTC2358/LTC2357/LTC2353/LTC2333 are low noise, high speed, 16-/18- bit successive approximation register (SAR) ADCs with integrated front end buffers. These ADCs accept a wide common mode range. Pico-amp inputs and high CMRR enable these ADCs to connect directly to a wide range of sensors without compromising measurement accuracy. The following text refers to the LTC2358-18 but applies to all parts in the family, the only differences being the number of bits, number of channels and the maximum sample rate. The LTC2358-18 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 2X buffer simplify basic operation while an external reference can be used to increase the input range and the SNR of the ADC.

Tools & Simulations

Tools & Simulations 2

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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