LTC1454I データシートの表示（PDF） - Linear Technology
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LTC1454I Datasheet PDF : 12 Pages
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LTC1454/LTC1454L
ELECTRICAL CHARACTERISTICS
VCC = 4.5V to 5.5V (LTC1454), 2.7V to 5.5V (LTC1454L), X1/X2 = REFLO = GND, REFHI = REFOUT, VOUT and REFOUT unloaded,
TA = TMIN to TMAX, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Power Supply
VCC
Positive Supply Voltage
For Specified Performance, LTC1454
LTC1454L
q
4.5
q
2.7
5.5
V
5.5
V
ICC
Supply Current
Op Amp DC Performance
4.5V ≤ VCC ≤ 5.5V (Note 4), LTC1454
2.7V ≤ VCC ≤ 5.5V (Note 4), LTC1454L
q
700 1250
µA
q
450 1100
µA
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
VOUT Shorted to GND
VOUT Shorted to VCC
Input Code = 0
q
70
120
mA
q
80
120
mA
q
40
Ω
AC Performance
Voltage Output Slew Rate
(Note 2)
q
0.5
1.0
V/µs
Voltage Output Settling Time (Notes 2, 3) to ±0.5LSB
14
µs
Digital Feedthrough
0.3
nV • s
SINAD
AC Feedthrough
Signal-to-Noise + Distortion
REFHI = 1kHz, 2VP-P, (Code: All 0s)
REFHI = 1kHz, 2VP-P, (Code: All 1s)
– 95
dB
85
dB
VCC = 5V (LTC1454), 3V (LTC1454L), TA = TMIN to TMAX, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
LTC1454
MIN TYP MAX
LTC1454L
MIN TYP MAX
UNITS
Digital I/O
VIH
Digital Input High Voltage
q
2.4
2.0
V
VIL
Digital Input Low Voltage
q
0.8
0.6
V
VOH
Digital Output High Voltage IOUT = – 1mA
q VCC – 1.0
VCC – 0.7
V
VOL
Digital Output Low Voltage IOUT = 1mA
q
0.4
0.4
V
ILEAK
Digital Input Leakage
VIN = GND to VCC
q
± 10
± 10
µA
CIN
Digital Input Capacitance
Guaranteed by Design
q
10
10
pF
Switching
t1
DIN Valid to CLK Setup
t2
DIN Valid to CLK Hold
t3
CLK High Time
t4
CLK Low Time
t5
CS/LD Pulse Width
t6
LSB CLK to CS/LD
t7
CS/LD Low to CLK
q
40
60
ns
q
0
0
ns
q
40
60
ns
q
40
60
ns
q
50
80
ns
q
40
60
ns
q
20
30
ns
t8
DOUT Output Delay
CLOAD = 15pF
t9
CLK Low to CS/LD Low
q
q
20
150
30
220
ns
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full scale).
Note 2: Load is 5kΩ in parallel with 100pF.
Note 3: DAC switched between all 1s and the code corresponding to VOS
for the part.
Note 4: Digital inputs at 0V or VCC.
3
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