DDC114
FEATURES
D SINGLE-CHIP SOLUTION TO DIRECTLY
MEASURE FOUR LOW-LEVEL CURRENTS
D HIGH PRECISION, TRUE INTEGRATING
FUNCTION
D INTEGRAL LINEARITY:
±0.01% of Reading ±0.5ppm of FSR
D VERY LOW NOISE: 5.2ppm of FSR D LOW POWER: 13.5m W/channel D ADJUSTABLE DATA RATE: Up to 3.125k SPS D PROGRAMMABLE FULL SCALE D DAISY-CHAINABLE SERIAL INTERFACE
APPLICATIONS
D CT SCANNER DAS D PHOTODIODE SENSORS D INFRARED PYROMETERS D LIQUID/GAS CHROMATOGRAPHY
Protected by US Patent #5841310
AVDD
VREF
DVDD
IN1 Dual
Switched Integrator
IN3
Dual Switched Integrator
IN2 Dual
Switched Integrator
IN4
Dual Switched Integrator
AGND
∆Σ Modulator
∆Σ Modulator
Digital Filter
Control
CLK CONV RANGE0 RANGE1 RANGE2 TEST CLK_4X HISPD/LOPWR RESET
Digital Filter
Digital Input/Output
FORMAT DCLK DCLK DVALID DOUT DOUT DIN DIN
DGND
DESCRIPTION
The DDC114 is a 20-bit, quad channel, current-input analog-to-digital (A/D) converter. It bines both current-to-voltage and A/D conversion so that four low-level current output...
