LTC1414 Linear Technology, LTC1414 Datasheet - Page 6

• Manufacturer Part Number: LTC1414
• Description: 14-Bit/ 2.2Msps/ Sampling A/D Converter
• Manufacturer: Linear Technology

FUNCTIONAL BLOCK DIAGRA
LTC1414
BUSY (Pin 25): The BUSY Output Shows the Converter
Status. It is low when a conversion is in progress.
V
10 F ceramic or 10 F tantalum in parallel with 0.1 F
ceramic.
6
PIN
TI I G DIAGRA
SS
W
U
U
(Pin 26): – 5V Negative Supply. Bypass to AGND with
FUNCTIONS
U
U
REFCOMP
(4.06V)
U
DGND
AGND
V
A
A
REF
IN
IN
+
–
CONVST
BUSY
DATA
U
W
2k
t
REF AMP
1
2.5V REF
DB13 TO DB0
DATA (N – 1)
t
4
INTERNAL
CLOCK
t
CONV
W
t
2
t
5
SUCCESSIVE APPROXIMATION
14-BIT CAPACITIVE DAC
C
C
CONTROL LOGIC
SAMPLE
SAMPLE
t
3
REGISTER
CONVST
AGND (Pin 27): Analog Ground.
AV
10 F ceramic or 10 F tantalum in parallel with 0.1 F
ceramic.
DD
DB13 TO DB0
DATA N
(Pin 28): 5V Positive Supply. Bypass to AGND with
BUSY
ZEROING SWITCHES
+
–
14
COMP
DB13 TO DB0
DATA (N + 1)
LATCHES
OUTPUT
1414 BD
1414 TD
•
•
•
D13
D0
OV
OGND
AV
DV
V
SS
DD
DD
DD