Datasheet

LTC2258-12
LTC2257-12/LTC2256-12
17
225812fd
For more information www.linear.com/LTC2258-12
FuncTional block DiagraM
Figure 1. Functional Block Diagram
DIFF
REF
AMP
REF
BUF
2.2µF
0.1µF 0.1µF
0.1µF
INTERNAL CLOCK SIGNALSREFH
REFH
REFL
REFL
CLOCK/DUTY
CYCLE
CONTROL
RANGE
SELECT
1.25V
REFERENCE
FIRST PIPELINED
ADC STAGE
FIFTH PIPELINED
ADC STAGE
FOURTH PIPELINED
ADC STAGE
SECOND PIPELINED
ADC STAGE
ENC
+
ENC
–
SHIFT REGISTER
AND CORRECTION
SDOCS
OGND
OF
OV
DD
D11
CLKOUT
–
CLKOUT
+
D0
225812 F01
INPUT
S/H
SENSE
V
REF
A
IN
–
A
IN
+
1µF
V
CM
0.1µF
V
DD
/2
THIRD PIPELINED
ADC STAGE
OUTPUT
DRIVERS
MODE
CONTROL
REGISTERS
SCKPAR/SER SDI
•
•
•
V
DD
GND