Datasheet

5
LTC1658
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Broadband Noise
TEMPERATURE (°C)
–55 –25 5 35 65 95 125
GAIN ERROR (LSB)
1658 G06
5
4
3
2
1
0
–1
–2
–3
–4
–5
Gain Error vs Temperature
BW = 1Hz TO 200µs/DIV 1658 G08
100kHz
PIN FUNCTIONS
UUU
CLK (Pin 1): The TTL Level Input for the Serial Interface
Clock.
D
IN
(Pin 2): The TTL Level Input for the Serial Interface
Data. Data on the D
IN
pin is latched into the shift register
on the rising edge of the serial clock and is loaded MSB
first. The LTC1658 requires a 16-bit word to be loaded in.
The last two bits are don’t cares.
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
OUT
(Pin 4): Output of the Shift Register Which Becomes
Valid on the Rising Edge of the Serial Clock.
GND (Pin 5): Ground.
REF (Pin 6): Reference Input. There is a gain of one from
this pin to the output. When tied to V
CC
the output will
swing from GND to V
CC
. The output can only swing to
within it’s offset specification of V
CC
(see Applicatons
Information).
V
OUT
(Pin 7): Buffered Rail-to-Rail DAC Output.
V
CC
(Pin 8): Positive Supply Input. 2.7V ≤ V
CC
≤ 5.5V.
1LSB/DIV