LTC1458 Linear Technology, LTC1458 Datasheet - Page 5

• Manufacturer Part Number: LTC1458
• Description: Quad 12-Bit Rail-to-Rail Micropower DACs
• Manufacturer: Linear Technology

X1/X2 C, X1/X2 D,X1/X2 A, X1/X2 B (Pins 1, 14, 16, 27):
The Input Pin that Sets the Gain for DAC C/D/A/B. When
grounded the gain will be 2, i.e., output full-scale will be
2 • REFHI. When connected to V
output full-scale will be equal to REFHI.
V
Buffered DAC Outputs.
CS/LD (Pin 3): The Serial Interface Enable and Load
Control Input.
D
REFHI C, REFHI D, REFHI A, REFHI B,(Pins 5, 9, 20, 24):
The Inputs to the DAC Resistor Ladder for DAC C/D/A/B.
GND (Pins 6, 23): Ground.
TYPICAL PERFORMANCE CHARACTERISTICS
PIN
OUT C
IN
4.110
4.105
4.100
4.095
4.090
4.085
4.080
U
(Pin 4): The Serial Data Input.
–55
LTC1458 Full-Scale Voltage vs
Temperature
, V
FUNCTIONS
OUT D
–25
U
TEMPERATURE ( C)
, V
5
OUT A
35
U
, V
65
OUT B
W
95
(Pins 2, 13, 17, 26): The
OUT
1458 G06
U
125
the gain will be 1, i.e.,
–1
–2
–3
–4
–5
5
4
3
2
1
0
–55
LTC1458
Offset Voltage vs Temperature
–25
TEMPERATURE ( C)
5
35
REFLO C, REFLO D, REFLO A, REFLO B, (Pins 7, 8, 21,
22): The Bottom of the DAC Resistor Ladders for the
DACs. These can be used to offset zero-scale above
ground. REFLO should be connected to ground when no
offset is required.
D
Becomes Valid on the Rising Edge of the Serial Clock.
CLK (Pin 11): The Serial Interface Clock Input.
V
quires a bypass capacitor to ground.
REFOUT (Pin 19): The Output of the Internal Reference.
CLR (Pin 25): The Clear Pin. Clears all DACs to zero-scale
when pulled low.
CC
OUT
5.5V (LTC1458), 2.7V
(Pins 15, 28): The Positive Supply Input. 4.5V V
65
(Pin 10): The Output of the Shift Register which
95
1458 G07
125
950
940
930
920
910
900
890
880
870
860
850
LTC1458/LTC1458L
–55
LTC1458
Supply Current vs Temperature
V
–25
CC
TEMPERATURE ( C)
5.5V (LTC1458L). Re-
5
V
V
V
CC
CC
CC
= 4.5V
= 5.5V
= 5V
35
65
95
1458 G05
5
125
CC