Datasheet

LTC2632
15
2632fa
PIN FUNCTIONS
SCK (Pin 1): Serial Interface Clock Input. CMOS and TTL
compatible.
CS/LD (Pin 2): 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.
REF (Pin 3): Reference Voltage Input or Output. When
external reference mode is selected, REF is an input (1V ≤
V
REF
≤ V
CC
) where the voltage supplied sets the full-scale
DAC output voltage. When internal reference is selected,
the 10ppm/°C 1.25V (LTC2632-L) or 2.048V (LTC2632-H)
internal reference (half full-scale) is available at the pin.
This output may be bypassed to GND with up to 10µF
(0.1µF is recommended) and must be buffered when
driving external DC load current.
GND (Pin 4): Ground.
V
OUT
A, V
OUT
B (Pins 5, 6): DAC Analog Voltage Output.
V
CC
(Pin 7): Supply Voltage Input. 2.7V ≤ V
CC
≤ 5.5V
(LTC2632-L) or 4.5V ≤ V
CC
≤ 5.5V (LTC2632-H). Bypass
to GND with a 0.1µF capacitor.
SDI (Pin 8): Serial Interface Data Input. Data on SDI is
clocked into the DAC on the rising edge of SCK. The LTC2632
accepts input word lengths of either 24 or 32 bits.