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