Datasheet

3
LTC1450/LTC1450L
V
CC
= 4.5V to 5.5V (LTC1450), 2.7V to 5.5V (LTC1450L), V
OUT
unloaded,
REFOUT = REFHI, REFLO = GND = X1/X2, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Input (REFLO = GND)
REFHI Input Range V
REFHI
≤ V
CC
– 1.5V ● V
CC
/2 V
REFHI Input Resistance ● 81830 kΩ
REFHI Input Capacitance 15 pF
Power Supply
V
CC
Positive Supply Voltage For Specified Performance, LTC1450L ● 2.7 5.5 V
LTC1450 ● 4.5 5.5 V
I
CC
Supply Current 4.5V ≤ V
CC
≤ 5.5V (Note 4) LTC1450 ● 300 400 620 µA
2.7V ≤ V
CC
≤ 5.5V (Note 4) LTC1450L ● 150 250 500 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND ● 100 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
● 120 mA
Output Impedance to GND Input Code = 0 ● 40 120 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 LDAC = 1 5 (nV)(s)
AC Feedthrough REFHI = 1kHz, 2V
P–P
–95 dB
SINAD Signal-to-Noise + Distortion REFHI = 1kHz, 2V
P–P
(Code: All 1’s) 85 dB
Digital Inputs
V
IH
Digital Input High Voltage V
CC
= 3V, LTC1450L ● 2.2 V
V
CC
= 5V, LTC1450 ● 2.4 V
V
IL
Digital Input Low Voltage V
CC
= 3V, LTC1450L ● 0.8 V
V
CC
= 5V, LTC1450 ● 0.8 V
V
LTH
Logic Threshold Voltage LTC1450L V
CC
/2 V
I
LEAK
Digital Input Leakage V
CC
= 5V, V
IN
= GND to V
CC
● –10 10 µA
C
IN
Digital Input Capacitance Guaranteed by Design. Not Subject to Test ● 10 pF