18-Bit, 500ksps, ±10.24V True Bipolar, Fully Differential Input ADC with 100dB SNR

The LTC2337-18 is a low noise, high speed 18-bit successive approximation register (SAR) ADC with fully differential inputs. Operating from a single 5V supply, the LTC2337-18 has a ±10.24V true bipolar input range, making it ideal for high voltage applications which require a wide dynamic range. The LTC2337-18 achieves ±4LSB INL maximum, no missing codes at 18-bits with 100dB SNR.

The LTC2337-18 has an on-board single-shot capable reference buffer and low drift (20ppm/°C max) 2.048V temperature compensated reference. The LTC2337-18 also has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 500ksps throughput with no cycle latency makes the LTC2337-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2337-18 dissipates only 35mW and automatically naps between conversions, leading to reduced power dissipation that scales with the sampling rate. A sleep mode is also provided to reduce the power consumption of the LTC2337-18 to 300μW for further power savings during inactive periods.

Applications

* Programmable Logic Controllers

* Industrial Process Control

* High Speed Data Acquisition

* Portable or Compact Instrumentation

* ATE

* 500ksps Throughput Rate

* ±4LSB INL (Max)

* Guaranteed 18-Bit No Missing Codes

* Fully Differential Inputs

* True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V

* 100dB SNR (Typ) at fIN = 2kHz

* –115dB THD (Typ) at fIN = 2kHz

* Guaranteed Operation to 125°C

* Single 5V Supply

* Low Drift (20ppm/°C Max) 2.048V Internal Reference

* On-board Single-Shot Capable Reference Buffer

* No Pipeline Delay, No Cycle Latency

* 1.8V to 5V I/O Voltages

* SPI-Compatible Serial I/O with Daisy-Chain Mode

* Internal Conversion Clock

* Power Dissipation 35mW (Typ)

* 16-Lead MSOP Package