LTC1405 UUWFU CTIO AL BLOCK DIAGRA OPTIONAL 3V 5V LOGIC SUPPLY VDD VDD GAIN (PIN 7) (PIN 23) OVDD +AIN S/H PIPELINED 12-BIT ADC OF –AIN D11 (MSB) OUTPUT VCM BUFFERS DIGITAL CORRECTION MODE SELECT LOGIC D0 (LSB) SENSE 2.5V CLK REFERENCE VREF 2.048V 1405 FBD V GND GND OGND SS GND (PIN 6) (PIN 8) (PIN 24) 0V OR –5V W UWTI I G DIAGRA N + 1 ANALOG N N + 2 INPUT N + 3 tCLOCK tH tL CLK tCONV tACQ DATA N – 3 N – 2 N – 1 N OUTPUT 1405 TD 1405fa 8