18-Bit, 1Msps, ±10.24V True Bipolar, Pseudo-Differential Input ADC with 95dB SNR

The LTC2328-18 is a low noise, high speed 18-bit successive approximation register (SAR) ADC with pseudo-differential inputs. Operating from a single 5V supply, the LTC2328-18 has a ±10.24V true bipolar input range, making it ideal for high voltage applications which require a wide dynamic range. The LTC2328-18 achieves ±5LSB INL maximum, no missing codes at 18 bits with 95dB SNR.

The LTC2328-18 has an onboard single-shot capable reference buffer and low drift (20ppm/°C max) 2.048V temperature compensated reference. The LTC2328-18 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 1Msps throughput with no cycle latency makes the LTC2328-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2328-18 dissipates only 50mW 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 LTC2328-18 to 300μW for further power savings during inactive periods.

Bits

LTC2328-16

16

LTC2328-18

18

Applications

* Programmable Logic Controllers

* Industrial Process Control

* High Speed Data Acquisition

* Portable or Compact Instrumentation

* ATE

* 1Msps Throughput Rate

* ±5LSB INL (Max)

* Guaranteed 18-Bit No Missing Codes

* Pseudo-Differential Inputs

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

* 95dB SNR (Typ) at fIN = 2kHz

* –111dB THD (Typ) at fIN = 2kHz

* Guaranteed Operation to 125°C

* Single 5V Supply* Low Drift (20ppm/°C Max) 2.048V Internal Reference