Datasheet

3
LTC1454/LTC1454L
ELECTRICAL CHARACTERISTICS
V
CC
= 4.5V to 5.5V (LTC1454), 2.7V to 5.5V (LTC1454L), X1/X2 = REFLO = GND, REFHI = REFOUT, V
OUT
and REFOUT unloaded,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
CC
Positive Supply Voltage For Specified Performance, LTC1454 ● 4.5 5.5 V
LTC1454L ● 2.7 5.5 V
I
CC
Supply Current 4.5V ≤ V
CC
≤ 5.5V (Note 4), LTC1454 ● 700 1250 µA
2.7V ≤ V
CC
≤ 5.5V (Note 4), LTC1454L ● 450 1100 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND ● 70 120 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
● 80 120 mA
Output Impedance to GND Input Code = 0 ● 40 Ω
AC Performance
Voltage Output Slew Rate (Note 2) ● 0.5 1.0 V/µs
Voltage Output Settling Time (Notes 2, 3) to ±0.5LSB 14 µs
Digital Feedthrough 0.3 nV•s
AC Feedthrough REFHI = 1kHz, 2V
P-P
, (Code: All 0s) –95 dB
SINAD Signal-to-Noise + Distortion REFHI = 1kHz, 2V
P-P
, (Code: All 1s) 85 dB
V
CC
= 5V (LTC1454), 3V (LTC1454L), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
LTC1454 LTC1454L
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Digital I/O
V
IH
Digital Input High Voltage ● 2.4 2.0 V
V
IL
Digital Input Low Voltage ● 0.8 0.6 V
V
OH
Digital Output High Voltage I
OUT
= –1mA ● V
CC
– 1.0 V
CC
– 0.7 V
V
OL
Digital Output Low Voltage I
OUT
= 1mA ● 0.4 0.4 V
I
LEAK
Digital Input Leakage V
IN
= GND to V
CC
● ±10 ±10 µA
C
IN
Digital Input Capacitance Guaranteed by Design ● 10 10 pF
Switching
t
1
D
IN
Valid to CLK Setup ● 40 60 ns
t
2
D
IN
Valid to CLK Hold ● 00ns
t
3
CLK High Time ● 40 60 ns
t
4
CLK Low Time ● 40 60 ns
t
5
CS/LD Pulse Width ● 50 80 ns
t
6
LSB CLK to CS/LD ● 40 60 ns
t7 CS/LD Low to CLK ● 20 30 ns
t
8
D
OUT
Output Delay C
LOAD
= 15pF ● 150 220 ns
t
9
CLK Low to CS/LD Low ● 20 30 ns
The ● 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 V
OS
for the part.
Note 4: Digital inputs at 0V or V
CC
.