LTC2247 Linear Technology, LTC2247 Datasheet - Page 12

• Manufacturer Part Number: LTC2247
• Description: (LTC2246 - LTC2248) 65/40/25Msps Low Power 3V ADCs
• Manufacturer: Linear Technology

w w w . d a t a s h e e t 4 u . c o m
FUNCTIONAL BLOCK DIAGRA
LTC2248/LTC2247/LTC2246
TI I G DIAGRA
12
SENSE
W
2.2µF
U
A
A
V
IN
IN
CM
+
–
U
INPUT
REFERENCE
S/H
SELECT
RANGE
1.5V
U
D0-D13, OF
REF
BUF
ANALOG
FIRST PIPELINED
INPUT
ADC STAGE
CLK
W
N
t
H
AMP
SECOND PIPELINED
DIFF
REF
t
t
AP
D
N – 5
ADC STAGE
t
L
1µF
REFH
Figure 1. Functional Block Diagram
N + 1
REFH
0.1µF
2.2µF
W
N – 4
REFL
THIRD PIPELINED
Timing Diagram
REFL
ADC STAGE
1µF
N + 2
INTERNAL CLOCK SIGNALS
CLOCK/DUTY
N – 3
CONTROL
CYCLE
CLK
FOURTH PIPELINED
N + 3
ADC STAGE
M0DE
N – 2
CONTROL
LOGIC
SHDN
N + 4
FIFTH PIPELINED
ADC STAGE
N – 1
OE
N + 5
224876 TD01
N
AND CORRECTION
SHIFT REGISTER
SIXTH PIPELINED
DRIVERS
OUTPUT
ADC STAGE
OGND
224876 F01
•
•
•
224876fa
OF
D13
D0
OV
DD