LTC2606/LTC2616/LTC2626
10
26061626fb
PIN FUNCTIONS
CA2 (Pin 1): Chip Address Bit 2. Tie this pin to V
CC
, GND
or leave it fl oating to select an I
2
C slave address for the
part (Table 1).
SDA (Pin 2): Serial Data Bidirectional Pin. Data is shifted
into the SDA pin and acknowledged by the SDA pin. This
pin is high impedance while data is shifted in. Open-drain
N-channel output during acknowledgment. SDA requires
a pull-up resistor or current source to V
CC
.
SCL (Pin 3): Serial Clock Input Pin. Data is shifted into
the SDA pin at the rising edges of the clock. This high
impedance pin requires a pull-up resistor or current
source to V
CC
.
CA0 (Pin 4): Chip Address Bit 0. Tie this pin to V
CC
, GND
or leave it fl oating to select an I
2
C slave address for the
part
(Table 1).
CA1 (Pin 5): Chip Address Bit 1. Tie this pin to V
CC
, GND
or leave it fl oating to select an I
2
C slave address for the
part
(Table 1).
REF (Pin 6): Reference Voltage Input. 0V ≤ V
REF
≤ V
CC
.
V
OUT
(Pin 7): DAC Analog Voltage Output. The output
range is 0V to V
REF
.
GND (Pin 8): Analog Ground.
V
CC
(Pin 9): Supply Voltage Input. 2.7V ≤ V
CC
≤ 5.5V.
LDAC (Pin 10): Asynchronous DAC Update. A falling edge
on this input after four bytes have been written into the part
immediately updates the DAC register with the contents of
the input register. A low on this input without a complete
32-bit (four bytes including the slave address) data write
transfer to the part does not update the DAC output. Soft-
ware power-down is disabled when LDAC is low.
Exposed Pad (Pin 11): Ground. Must be soldered to PCB
ground.
