LTC1746 LINER [Linear Technology], LTC1746 Datasheet - Page 8

• Manufacturer Part Number: LTC1746
• Description: Low Power,14-Bit, 25Msps ADC
• Manufacturer: LINER [Linear Technology]

PI FU CTIO S
LTC1746
SENSE (Pin 1): Reference Sense Pin. Ground selects
1.6V applied to the SENSE pin selects an input range of
V
Bypass to ground with 4.7 F ceramic chip capacitor.
GND (Pins 3, 6, 9, 12, 13, 16, 19, 21, 36, 37): ADC
Power Ground.
A
A
V
with 1 F ceramic chip capacitor.
REFLB (Pin 10): ADC Low Reference. Bypass to Pin 11
with 0.1 F ceramic chip capacitor. Do not connect to
Pin 14.
REFHA (Pin 11): ADC High Reference. Bypass to Pin 10
with 0.1 F ceramic chip capacitor, to Pin 14 with a 4.7 F
ceramic capacitor and to ground with 1 F ceramic
capacitor.
REFLA (Pin 14): ADC Low Reference. Bypass to Pin 15
with 0.1 F ceramic chip capacitor, to Pin 11 with a 4.7 F
ceramic capacitor and to ground with 1 F ceramic
capacitor.
REFHB (Pin 15): ADC High Reference. Bypass to Pin 14
with 0.1 F ceramic chip capacitor. Do not connect to
Pin 11.
8
1V. V
V
CM
IN
IN
DD
SENSE
U
+
–
(Pin 2): 2.35V Output and Input Common Mode Bias.
(Pins 7, 8, 17, 18, 20): 5V Supply. Bypass to GND
(Pin 4): Positive Differential Analog Input.
(Pin 5): Negative Differential Analog Input.
DD
, 1.6V is the largest valid input range.
selects 1.6V. Greater than 1V and less than
U
U
MSBINV (Pin 22): MSB Inversion Control. Low inverts
the MSB, 2’s complement output format. High does not
invert the MSB, offset binary output format.
ENC (Pin 23): Encode Input. The input sample starts on
the positive edge.
ENC (Pin 24): Encode Complement Input. Conversion
starts on the negative edge. Bypass to ground with 0.1 F
ceramic for single-ended encode signal.
OE (Pin 25): Output Enable. Low enables outputs. Logic
high makes outputs Hi-Z.
CLKOUT (Pin 26): Data Valid Output. Latch data on the
rising edge of CLKOUT.
OGND (Pins 27, 38, 47): Output Driver Ground.
D0-D3 (Pins 28 to 31): Digital Outputs. D0 is the LSB.
OV
ers. Bypass to ground with 0.1 F ceramic chip capacitor.
D4-D6 (Pins 33 to 35): Digital Outputs.
D7-D10 (Pins 39 to 42): Digital Outputs.
D11-D13 (Pins 44 to 46): Digital Outputs. D13 is the
MSB.
OF (Pin 48): Over/Under Flow Output. High when an over
or under flow has occurred.
DD
(Pins 32, 43): Positive Supply for the Output Driv-
1746f