
LTC1661
3
1661fa
ELECTRICAL CHARACTERISTICS
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VREF ≤ VCC, VOUT unloaded unless otherwise noted.
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Input
Input Voltage Range
l
0
VCC
V
Resistance
Active Mode
l
140
260
kΩ
Capacitance
l
15
pF
IREF
Reference Current
Sleep Mode
l
0.001
1
A
Power Supply
VCC
Positive Supply Voltage
For Specified Performance
l
2.7
5.5
V
ICC
Supply Current
VCC = 5V (Note 3)
Sleep Mode (Note 3)
l
120
95
1
195
154
3
A
DC Performance
Short-Circuit Current Low
VOUT = 0V, VCC = VREF = 5V, Code = 1023
l
10
25
100
mA
Short-Circuit Current High
VOUT = VCC = VREF = 5V, Code = 0
l
7
19
120
mA
AC Performance
Voltage Output Slew Rate
Rising (Notes 4, 5)
Falling (Notes 4, 5)
0.60
0.25
V/s
Voltage Output Settling Time
To ±0.5LSB (Notes 4, 5)
30
s
Capacitive Load Driving
1000
pF
Digital I/O
VIH
Digital Input High Voltage
VCC = 2.7V to 5.5V
VCC = 2.7V to 3.6V
l
2.4
2.0
V
VIL
Digital Input Low Voltage
VCC = 4.5V to 5.5V
VCC = 2.7V to 5.5V
l
0.8
0.6
V
ILK
Digital Input Leakage
VIN = GND to VCC
l
±10
A
CIN
Digital Input Capacitance
(Note 6)
l
10
pF
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC = 4.5V to 5.5V
t1
DIN Valid to SCK Setup
l
40
ns
t2
DIN Valid to SCK Hold
l
0
ns
t3
SCK High Time
(Note 6)
l
30
ns
t4
SCK Low Time
(Note 6)
l
30
ns
t5
CS/LD Pulse Width
(Note 6)
l
80
ns
t6
LSB SCK High to CS/LD High
(Note 6)
l
30
ns
t7
CS/LD Low to SCK High
(Note 6)
l
20
ns
t9
SCK Low to CS/LD Low
(Note 6)
l
0
ns
t11
CS/LD High to SCK Positive Edge
(Note 6)
l
20
ns
SCK Frequency
Square Wave (Note 6)
l
16.7
MHz