LTC1655 LINER [Linear Technology], LTC1655 Datasheet - Page 5

• Manufacturer Part Number: LTC1655
• Description: 16-Bit Rail-to-Rail Micropower DAC in SO-8 Package
• Manufacturer: LINER [Linear Technology]

CLK (Pin 1): The TTL Level Input for the Serial Interface
Clock.
D
Data. Data on the D
on the rising edge of the serial clock and is loaded MSB
first. The LTC1655 requires a 16-bit word.
CS/LD (Pin 3): The TTL Level Input for the Serial Inter-
face Enable and Load Control. When CS/LD is low the
CLK signal is enabled, so the data can be clocked in.
When CS/LD is pulled high, data is loaded from the shift
register into the DAC register, updating the DAC output.
D
on the rising edge of the serial clock and swings from GND
to V
TI I G DIAGRA
PIN
IN
OUT
W U
U
(Pin 2): The TTL Level Input for the Serial Interface
CC
(Pin 4): Output of the Shift Register. Becomes valid
.
FUNCTIONS
CS/LD
D
CLK
OUT
U
D
IN
IN
t
9
PREVIOUS WORD
U
pin is latched into the shift register
D15
t
7
W
MSB
D15
t
8
1
PREVIOUS WORD
D14
t
1
D14
t
2
2
PREVIOUS WORD
D13
t
4
D13
GND (Pin 5): Ground.
REF (Pin 6): Reference. Output of the internal reference is
2.048V. There is a gain of two from this pin to the output.
The reference can be overdriven from 2.2V to V
tied to V
output can only swing to within its offset specification of
V
V
clears to 0V on power-up.
V
Requires a bypass capacitor to ground.
t
3
CC
OUT
CC
3
(see Applications Information).
(Pin 8): Positive Supply Input. 4.5V
(Pin 7): Deglitched Rail-to-Rail Voltage Output. V
CC
/2, the output will swing from GND to V
D1
15
PREVIOUS WORD
D0
LSB
D0
16
t
6
CURRENT WORD
D15
t
5
LTC1655
V
1655 TD
CC
CC
/2. When
CC
5.5V.
. The
5
OUT