Datasheet
3
LTC1661
E
LECTR
IC
AL C CHARA TERIST
ICS
TI I G CHARACTERISTICS
UW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
= 4.5V to 5.5V
t
1
D
IN
Valid to SCK Setup ● 40 15 ns
t
2
D
IN
Valid to SCK Hold ● 0–10 ns
t
3
SCK High Time (Note 6) ● 30 14 ns
t
4
SCK Low Time (Note 6) ● 30 14 ns
t
5
CS/LD Pulse Width (Note 6) ● 80 27 ns
t
6
LSB SCK High to CS/LD High (Note 6) ● 30 2 ns
t
7
CS/LD Low to SCK High (Note 6) ● 20 –21 ns
t
9
SCK Low to CS/LD Low (Note 6) ● 0–5 ns
t
11
CS/LD High to SCK Positive Edge (Note 6) ● 20 0 ns
SCK Frequency Square Wave (Note 6) ● 16.7 MHz
V
CC
= 2.7V to 5.5V
t
1
D
IN
Valid to SCK Setup (Note 6) ● 60 20 ns
t
2
D
IN
Valid to SCK Hold (Note 6) ● 0–10 ns
t
3
SCK High Time (Note 6) ● 50 15 ns
t
4
SCK Low Time (Note 6) ● 50 15 ns
t
5
CS/LD Pulse Width (Note 6) ● 100 30 ns
t
6
LSB SCK High to CS/LD High (Note 6) ● 50 3 ns
t
7
CS/LD Low to SCK High (Note 6) ● 30 –14 ns
t
9
SCK Low to CS/LD Low (Note 6) ● 0–5 ns
t
11
CS/LD High to SCK Positive Edge (Note 6) ● 30 0 ns
SCK Frequency Square Wave (Note 6) ● 10 MHz
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Performance
Short-Circuit Current Low V
OUT
= 0V, V
CC
= V
REF
= 5V, Code = 1023 ● 10 25 100 mA
Short-Circuit Current High V
OUT
= V
CC
= V
REF
= 5V, Code = 0 ● 7 19 120 mA
AC Performance
Voltage Output Slew Rate Rising (Notes 4, 5) 0.60 V/µs
Falling (Notes 4, 5) 0.25 V/µs
Voltage Output Settling Time To ±0.5LSB (Notes 4, 5) 30 µs
Capacitive Load Driving 1000 pF
Digital I/O
V
IH
Digital Input High Voltage V
CC
= 2.7V to 5.5V ● 2.4 V
V
CC
= 2.7V to 3.6V ● 2.0 V
V
IL
Digital Input Low Voltage V
CC
= 4.5V to 5.5V ● 0.8 V
V
CC
= 2.7V to 5.5V ● 0.6 V
I
LK
Digital Input Leakage V
IN
= GND to V
CC
● ±10 µA
C
IN
Digital Input Capacitance (Note 6) ● 10 pF
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
REF
≤ V
CC
, V
OUT
Unloaded unless otherwise noted.
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
Note 2: Nonlinearity and monotonicity are defined from code 20 to code
1023 (full scale). See Applications Information.