參數(shù)資料
型號: LTC1448
廠商: Linear Technology Corporation
英文描述: Dual 12-Bit Rail-to-Rail Micropower DAC
中文描述: 雙12位軌至軌微援
文件頁數(shù): 4/12頁
文件大?。?/td> 241K
代理商: LTC1448
4
LTC1448
CLK (Pin 1):
Serial Interface Clock. Internal Schmitt trig-
ger on this input allows direct optocoupler interface.
D
IN
(Pin 2):
Serial Interface Data. Data on the D
IN
pin is
latched into the shift register on the rising edge of the serial
clock.
CS/LD (Pin 3):
Serial Interface 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,
PI
FU
CTIO
N
S
U
U
updating the DAC output and the CLK is disabled
internally.
REF (Pin 4):
Reference Input for Both DACs. This pin can
be tied to V
CC
. The output will swing from 0V to REF. The
typical input resistance is 12.5k.
V
OUT A
, V
OUT B
(Pins 5, 8):
Buffered DAC Outputs.
GND (Pin 6):
Ground.
V
CC
(Pin 7):
Positive Supply Input. 2.7V
V
CC
5.5V.
Requires a bypass capacitor to ground.
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
LOAD CURRENT (mA)
0
V
C
O
5
10
15
1448 G03
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
OUT
< 1LSB
CODE: ALL 1’s
V
OUT
= 4.095V
OUTPUT SINK CURRENT (mA)
0
O
5
10
15
1448 G04
800
700
600
500
400
300
200
100
0
CODE: ALL 0’s
125
°
C
25
°
C
–55
°
C
Integral Nonlinearity (INL)
Minimum Supply Headroom for
Full Output Swing vs Load Current
Minimum Output Voltage vs
Output Sink Current
Supply Current vs
Logic Input Voltage
Differential Nonlinearity (DNL)
CODE
0
I
5
4
3
2
1
0
–1
–2
–3
–4
–5
1024
2048 2560
1448 G01
512
1536
3072 3584 4095
CODE
0
–0.5
D
–0.4
–0.2
–0.1
0
0.5
0.2
1024
2048 2560
1448 TA02
–0.3
0.3
0.4
0.1
512
1536
3072 3584 4095
LOGIC INPUT VOLTAGE (V)
0
S
2.0
1.6
1.2
0.8
0.4
0
4
1448 G06
1
2
3
5
相關PDF資料
PDF描述
LTC1448C Low-Power LinCMOS(TM) Dual Comparator with Totem Pose Output 20-LCCC -55 to 125
LTC1448CN8 Low-Power LinCMOS(TM) Dual Comparator with Totem Pose Output 8-CDIP -55 to 125
LTC1448CS8 Dual 12-Bit Rail-to-Rail Micropower DAC
LTC1448I Quad, Micropower, Push-Pull Outputs, LinCMOS(TM) Voltage Comparator 14-SOIC 0 to 70
LTC1450CG Quad, Micropower, Push-Pull Outputs, LinCMOS(TM) Voltage Comparator 14-SOIC 0 to 70
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