LTC1867LACGN 데이터 시트보기 (PDF) - Linear Technology

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LTC1867LACGN

Micropower, 3V, 12-/16-Bit, 8-Channel 175ksps ADCs

Linear Technology 

LTC1863L/LTC1867L

TYPICAL PERFORMANCE CHARACTERISTICS

(LTC1863L/ LTC1867L)

Integral Nonlinearity

vs Output Code (LTC1863L)

1.00

0.75

0.50

Differential Nonlinearity

vs Output Code (LTC1863L)

1.00

0.75

0.50

0.25

0.25

0

0

–0.25

–0.25

–0.50

–0.50

–0.75

–0.75

–1.00

0

512 1024 1536 2048 2560 3072 3584 4096

CODE

1863L7L G16

–1.00

0

512 1024 1536 2048 2560 3072 3584 4096

CODE

1863L7L G17

PIN FUNCTIONS

CHO-CH7/COM (Pins 1-8): Analog Input Pins. Analog

inputs must be free of noise with respect to GND. CH7/

COM can be either a separate channel or the common

minus input for the other channels. Unused channels

should be tied to ground.

REFCOMP (Pin 9): Reference Buffer Output Pin. Bypass

to GND with 10µF tantalum capacitor in parallel with 0.1µF

ceramic capacitor (2.5V Nominal). To overdrive REFCOMP,

tie VREF to GND.

VREF (Pin 10): 1.25V Reference Output. This pin can also

be used as an external reference buffer input for improved

accuracy and drift. Bypass to GND with 2.2µF tantalum

capacitor in parallel with 0.1µF ceramic capacitor.

CS/CONV (Pin 11): This input provides the dual function

of initiating conversions on the ADC and also frames the

serial data transfer.

SCK (Pin 12): Shift Clock. This clock synchronizes the

serial data transfer.

SDO (Pin 13): Digital Data Output. The A/D conversion

result is shifted out of this output. Straight binary format

for unipolar mode and two’s complement format for

bipolar mode.

SDI (Pin 14): Digital Data Input Pin. The A/D configuration

word is shifted into this input.

GND (Pin 15): Analog and Digital GND.

VDD (Pin 16): Analog and Digital Power Supply. Bypass to

GND with 10µF tantalum capacitor in parallel with 0.1µF

ceramic capacitor.

For more information www.linear.com/LTC1863L

1863l7lfd

7

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