3
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
q
4.5
5.5
V
LTC1454L
q
2.7
5.5
V
ICC
Supply Current
4.5V
≤ VCC ≤ 5.5V (Note 4), LTC1454
q
700
1250
A
2.7V
≤ VCC ≤ 5.5V (Note 4), LTC1454L
q
450
1100
A
Op Amp DC Performance
Short-Circuit Current Low
VOUT Shorted to GND
q
70
120
mA
Short-Circuit Current High
VOUT Shorted to VCC
q
80
120
mA
Output Impedance to GND
Input Code = 0
q
40
AC Performance
Voltage Output Slew Rate
(Note 2)
q
0.5
1.0
V/
s
Voltage Output Settling Time
(Notes 2, 3) to
±0.5LSB
14
s
Digital Feedthrough
0.3
nV s
AC Feedthrough
REFHI = 1kHz, 2VP-P, (Code: All 0s)
– 95
dB
SINAD
Signal-to-Noise + Distortion
REFHI = 1kHz, 2VP-P, (Code: All 1s)
85
dB
VCC = 5V (LTC1454), 3V (LTC1454L), TA = TMIN to TMAX, unless otherwise noted.
LTC1454
LTC1454L
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
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
V
ILEAK
Digital Input Leakage
VIN = GND to VCC
q
±10
A
CIN
Digital Input Capacitance
Guaranteed by Design
q
10
pF
Switching
t1
DIN Valid to CLK Setup
q
40
60
ns
t2
DIN Valid to CLK Hold
q
00
ns
t3
CLK High Time
q
40
60
ns
t4
CLK Low Time
q
40
60
ns
t5
CS/LD Pulse Width
q
50
80
ns
t6
LSB CLK to CS/LD
q
40
60
ns
t7
CS/LD Low to CLK
q
20
30
ns
t8
DOUT Output Delay
CLOAD = 15pF
q
150
220
ns
t9
CLK Low to CS/LD Low
q
20
30
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 5k
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.