LTC1257(RevA) 查看數據表（PDF） - Linear Technology
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LTC1257 Datasheet PDF : 12 Pages
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LTC1257
ELECTRICAL CHARACTERISTICS VCC = 4.75V to 15.75V, internal or external reference
(2.475V ≤ VREF ≤ VCC – 2.7V), IOUT ≤ 2mA, TA = TMIN to TMAX, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP
Power Supply
VCC
Positive Supply Voltage
ICC
Supply Current
Op Amp DC Performance
For Specified Performance
4.75V ≤ VCC ≤ 5.25V
4.75V ≤ VCC ≤ 15.75V
q
4.75
q
350
q
800
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
VOUT Shorted to GND
VOUT Shorted to VCC
Input Code = 0
q
q
q
150
AC Performance
Voltage Output Slew Rate
5kΩ in Parallel with 100pF
q
1.0
Voltage Output Settling Time
To ±1/2LSB, 5kΩ in Parallel with 100pF
q
Digital Feedthrough
(Notes 1,2)
50
Digital I/O
VIH
Digital Input High Voltage
VIL
Digital Input Low Voltage
VOH
Digital Output High Voltage
VOL
Digital Output Low Voltage
ILEAK
Digital Input Leakage
CIN
Digital Input Capacitance
Switching (Note 1)
IOUT = –1mA, DOUT Only
IOUT = 1mA, DOUT Only
VIN = GND to VCC
(Note 1)
q
2.4
q
q
VCC – 1
q
0.4
q
q
t1
DIN Valid to CLK Setup
t2
DIN Valid to CLK Hold
t3
CLK High Time
q
100
q
25
q
350
t4
CLK Low Time
q
350
t5
LOAD Pulse Width
q
150
t6
LSB CLK to LOAD
q
0
t7
LOAD High to CLK
q
0
t8
DOUT Output Delay
fCLK
Maximum Clock Frequency
CLOAD = 15pF
q
35
MAX
15.75
600
1500
60
60
400
6
0.8
±10
10
150
1.4
UNITS
V
µA
µA
mA
mA
Ω
V/µs
µs
nV/s
V
V
V
V
µA
pF
ns
ns
ns
ns
ns
ns
ns
ns
MHz
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Guaranteed by design; not subject to test.
Note 2: DAC switched from all 1s to all 0s, and all 0s to all 1s code.
3
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