LTC2328-18 Family

By Analog Devices Inc 51

LTC2328-18 Family

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

The LTC2328-18 has an onboard single-shot-capable reference buffer and low drift (20 ppm/°C max) 2.048 V temperature-compensated reference. The LTC2328-18 also has a high-speed SPI-compatible serial interface that supports 1.8 V, 2.5 V, 3.3 V and 5 V 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 50 mW 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 300 μW for further power savings during inactive periods.

  • 1 Msps throughput rate
  • ±5 LSB INL (max.)
  • Guaranteed 18-bit no missing codes
  • Pseudo-differential inputs
  • True-bipolar input ranges ±6.25 V, ±10.24 V, ±12.5 V
  • 95 dB SNR (typ.) at fIN = 2 kHz
  • –110 dB THD (typ.) at fIN = 2 kHz
  • Guaranteed operation to 125°C
  • Single 5 V supply
  • Low drift (20 ppm/°C max.) 2.048 V internal reference
  • Onboard single-shot-capable reference buffer
  • No pipeline delay, no cycle latency
  • 1.8 V to 5 V I/O voltages
  • SPI-compatible serial I/O with daisy-chain mode
  • Internal conversion clock
  • Power dissipation 50 mW (typ.)
  • 16-lead MSOP package