Datasheet
3
LTC1655/LTC1655L
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 4.5V to 5.5V (LTC1655), V
CC
= 2.7V to 5.5V (LTC1655L); V
OUT
unloaded, REF unloaded, unless otherwise noted.
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND
LTC1655
● 70 120 mA
LTC1655L
● 70 140 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
LTC1655 ● 80 140 mA
LTC1655L
● 70 150 mA
Output Impedance to GND Input Code = 0
LTC1655
● 40 120 Ω
LTC1655L
● 70 160 Ω
Output Line Regulation Input Code = 65535, with Internal Reference ±3 mV/V
AC Performance
Voltage Output Slew Rate (Note 4) ● ±0.3 ±0.7 V/µs
Voltage Output Settling Time (Note 4) to 0.0015% (16-Bit Settling Time), V
CC
= 5V 20 µs
(Note 4) to 0.012% (13-Bit Settling Time), V
CC
= 5V 10 µs
Digital Feedthrough (Note 5) 0.3 nV-s
Midscale Glitch Impulse DAC Switched Between 8000
H
and 7FFF
H
12 nV-s
Output Voltage Noise LTC1655, At 1kHz 280 nV√Hz
Spectral Density LTC1655L, At 1kHz 220 nV√Hz
Reference Output
Reference Output Voltage LTC1655 ● 2.036 2.048 2.060 V
LTC1655L
● 1.240 1.250 1.260 V
Reference Input Range (Notes 6, 7) LTC1655 2.2 V
CC
/2 V
LTC1655L 1.3 V
CC
/2 V
Reference Output Tempco LTC1655 5 ppm/°C
LTC1655L 10 ppm/°C
Reference Input Resistance LTC1655, REF Overdriven to 2.2V ● 8.5 13 kΩ
LTC1655L, REF Overdriven to 1.3V
● 7.0 13 kΩ
Reference Short-Circuit Current ● 40 100 mA
Reference Output Line Regulation ±1.5 mV/V
Reference Load Regulation I
OUT
= 100µA ● 5 mV/A
Reference Output Voltage Noise LTC1655, At 1kHz 150 nV√Hz
Spectral Density LTC1655L, At 1kHz 115 nV√Hz
Digital I/O
V
IH
Digital Input High Voltage LTC1655 ● 2.4 V
LTC1655L
● 2.0 V
V
IL
Digital Input Low Voltage LTC1655 ● 0.8 V
LTC1655L
● 0.6 V
V
OH
Digital Output High Voltage LTC1655, I
OUT
= –1mA ● V
CC
– 1.0 V
LTC1655L, I
OUT
= – 1mA ● V
CC
– 0.7 V
V
OL
Digital Output Low Voltage LTC1655, I
OUT
= 1mA ● 0.4 V
LTC1655L, I
OUT
= 1mA ● 0.4 V
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS