LTC1428-50 Linear Technology, LTC1428-50 Datasheet - Page 4

• Manufacturer Part Number: LTC1428-50
• Description: Micropower 8-Bit Current Sink Output D/A Converter
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
I
systems, the DAC I
V
must be kept free from noise and ripple by bypassing
directly to a ground plane.
SHDN (Pin 3): Shutdown. A logic low puts the chip
into shutdown mode. The digital setting for the DAC is
retained.
CLK (Pin 4): Shift Clock. This clock synchronizes the serial
data and has a Schmitt trigger input.
CS (Pin 5): Chip Select Input. In 3-wire mode, a logic low
enables the LTC1428-50. Upon power-up, a logic high
LTC1428-50
4
PIN
OUT
CC
52.5
51.5
48.5
50.5
49.5
47.5
U
(Pin 2): Voltage Supply (3V V
– 55
(Pin 1): DAC Current Sink Output. In 3.3V or 5V
Temperature Variation
V
V(I
FUNCTIONS
CC
OUT
– 25
= 3.3V
) = 2.5V
U
5
TEMPERATURE ( C)
35
OUT
U
65
pin can be biased from 2V to 10V.
95
W
125
1428-50 G04
U
CC
155
6.5V). This supply
–10
–12
– 6
– 8
–2
–4
2
0
Bias Voltage Rejection
0
2
4
I
OUT
6
BIAS VOLTAGE (V)
8
puts the chip into pulse mode. If CS ever goes low, the chip
is configured into 3-wire mode until V
GND (Pin 6): Ground. Ground should be tied directly to a
ground plane.
D
data is shifted into D
logic high puts the counter into increment-only mode. If
D
decrement mode until V
D
conversion D
data. In pulse mode, D
10
IN
IN
OUT
ever goes low, the counter is configured in increment/
(UP/DN)(Pin 7): Data Input. In 3-wire mode, the DAC
V
T
12
A
CC
= 25 C
(Pin 8): Data Output. In 3-wire mode, on every
= 3.3V
1428-50 G05
14
16
OUT
0.06
0.05
0.04
0.03
0.02
0.01
0
serially outputs the previous 8-bit DAC
IN
. In pulse mode, upon power-up a
OUT
CC
20
18
16
14
12
10
8
6
4
2
0
0
Zero-Scale I
is three-stated.
is reset.
V
CC
10
= 3.3V
20
TEMPERATURE ( C)
OUT
CC
30
vs Temperature
is reset.
V(I
40
OUT
) = 10V
V(I
50
V(I
OUT
OUT
) = 2.5V
) = 5V
60
1428-50 G06
70