LTC1404 Datasheet, PDF (8/24 Pages) Linear Technology – Complete SO-8, 12-Bit, 600ksps ADC with Shutdown

LTC1404
TYPICAL PERFORMANCE CHARACTERISTICS
Unipolar Mode V_CC Supply Current
vs Temperature
20
15
10
5
f_SAMPLE = 600kHz
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1404 G23
Bipolar Mode Supply Current
vs Temperature
15.0
300
12.5
250
V_CC CURRENT
10.0
200
7.5
V_SS CURRENT
150
5.0
100
2.5
f_SAMPLE = 600kHz
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
50
0
100 125
1404 G24
PIN FUNCTIONS
V_CC (Pin 1): Positive Supply, 5V. Bypass to GND (10µF
tantalum in parallel with 0.1µF ceramic).
A_IN (Pin 2): Analog Input. 0V to 4.096V (Unipolar), ±2.048V
(Bipolar).
V_REF (Pin 3): 2.43V Reference Output. Bypass to GND
(10µF tantalum in parallel with 0.1µF ceramic).
GND (Pin 4): Ground. GND should be tied directly to an
analog ground plane.
D_OUT (Pin 5): The A/D conversion result is shifted out from
this pin.
CLK (Pin 6): Clock. This clock synchronizes the serial data
transfer. A minimum CLK pulse of 40ns signals the ADC to
wake up from Nap or Sleep mode.
CONV (Pin 7): Conversion Start Signal. This active high
signal starts a conversion on its rising edge. Keeping CLK
low and pulsing CONV two/four times will put the ADC into
Nap/Sleep mode.
V_SS (Pin 8): Negative Supply. – 5V for bipolar operation.
Bypass to GND with 10µF tantalum in parallel with 0.1µF
ceramic. V_SS should be tied to GND for unipolar operation.
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