Analog Devices LTC2333-18 Product Info

• Eight Buffered Multiplexed Channels
• 800ksps Throughput
• 500pA/12nA Maximum Input Leakage at 85°C/125°C
• ±3LSB INL (Maximum ±10.24V Range)
• Guaranteed 18-Bit, No Missing Codes
• Differential, Wide Common Mode Range Inputs
• 8-Channel Multiplexer with 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 f_IN = 2kHz
• 128dB CMRR, –125dB Active Crosstalk (Typical)
• 420ns Step Response (Full-Scale, 0.005% Settling)
• Rail-to-Rail Input Overdrive Tolerance
• Programmable Sequencer with No-Latency Control
• Integrated Reference and Buffer (4.096V)
• SPI CMOS (1.8V to 5V) and LVDS Serial I/O
• 268mW Power Dissipation (Typical)
• 48-Lead (7mm × 7mm) LQFP Package

The LTC2333-18 is an 18-bit, low noise 8-channel multiplexed 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, this SoftSpan^™ ADC can be configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals on any channel. Alternately, the ADC may be programmed to cycle through a sequence of channels and ranges without further user intervention.

The integrated picoamp-input analog buffers, wide input common mode range and 128dB CMRR of the LTC2333- 18 allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the LTC2333-18 an ideal choice for many high voltage applications requiring wide dynamic range.

The LTC2333-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.

Applications

• Direct Sensor Measurement
• Programmable Logic Controllers
• Industrial Process Control
• Test and Measurement