LTC2348-18
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LTC2348-18

Octal, 18-Bit, 200ksps Differential ±10.24V Input SoftSpan ADC with Wide Input Common Mode Range

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Info: : PRODUCTION tooltip
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Part Details
Part Models 3
1ku List Price Starting From $27.49
Features
  • 200ksps per Channel Throughput
  • Eight Simultaneous Sampling Channels
  • ±3LSB INL (Maximum, ±10.24V Range)
  • Guaranteed 18-Bit, No Missing Codes
  • Differential, 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
  • 96.7dB Single-Conversion SNR (Typical)
  • −109dB THD (Typical) at fIN = 2kHz
  • 118dB 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
  • 140mW Power Dissipation (Typical)
  • 48-Lead (7mm x 7mm) LQFP Package
Additional Details
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The LTC2348-18 is an 18-bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range 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 wide input common mode range and 118dB CMRR of the LTC2348-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±3LSB INL, no missing codes at 18 bits, and 96.7dB SNR, makes the LTC2348-18 an ideal choice for many high voltage applications requiring wide dynamic range.

The LTC2348-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and eight 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 $27.49

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2348CLX-18#PBF
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LTC2348HLX-18#PBF
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LTC2348ILX-18#PBF
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Product Lifecycle

PCN

Apr 6, 2021

- 21_0046

Transfer of LQFP and LQFP_EP from AEM to AET

LTC2348CLX-18#PBF

PRODUCTION

LTC2348HLX-18#PBF

PRODUCTION

LTC2348ILX-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

LTC2348CLX-18#PBF

PRODUCTION

LTC2348HLX-18#PBF

PRODUCTION

LTC2348ILX-18#PBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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DC2094A-A

LTC2348-18 Demo Board | Octal, Simultaneous, 18-Bit, 200ksps SAR ADC (req DC590, DC2026 or DC890)

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DC2094A-A

LTC2348-18 Demo Board | Octal, Simultaneous, 18-Bit, 200ksps SAR ADC (req DC590, DC2026 or DC890)

LTC2348-18 Demo Board | Octal, Simultaneous, 18-Bit, 200ksps SAR ADC (req DC590, DC2026 or DC890)

Product Detail

Demonstration circuit 2094A shows the proper way to drive the LTC®2348 family of ADCs. The LTC2348/LTC2347/LTC2343 are low noise, high speed, simultaneous sampling 16-/18-bit successive approximation register (SAR) ADCs. The demo manual refers to the LTC2348-18 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 LTC2348-18 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.


 


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

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