LTC2630
12
2630ff
Block Diagram
pin Functions
CS/LD (Pin 1): Serial Interface Chip Select/Load Input.
When CS
/LD is low, SCK is enabled for shifting data on
SDI into the register. When CS
/LD is taken high, SCK
is disabled and the specified command (see Table 1) is
executed.
SCK (Pin 2): Serial Interface Clock Input. CMOS and TTL
compatible.
SDI (Pin 3): Serial Interface Data Input. Data on SDI
is clocked into the DAC on the rising edge of SCK. The
LTC2630 accepts input word lengths of either 24 or 32 bits.
V
CC
(Pin 4): Supply Voltage Input. 2.7V ≤ V
CC
≤ 5.5V
(LTC2630-L) or 4.5V ≤ V
CC
≤ 5.5V (LTC2630-H). Also
used as the reference input when the part is programmed
to operate in supply as reference mode. Bypass to GND
with a 0.1µF capacitor.
GND (Pin 5): Ground.
V
OUT
(Pin 6): DAC Analog Voltage Output.
DAC
REGISTER
RESISTOR
DIVIDER
INTERNAL
REFERENCE
INPUT
REGISTER
24-BIT
SHIFT
REGISTER
DAC
V
OUT
CONTROL
DECODE LOGIC
CS/LD
V
CC
GND
DACREF
2630 BD
SCK
SDI
