Datasheet

LTC2758
4
2758fa
For more information www.linear.com/LTC2758
TIMING CHARACTERISTICS
The l denotes specifications that apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C.
ELECTRICAL CHARACTERISTICS
V
DD
= 5V, V(R
INX
) = 5V unless otherwise specified. The l denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
DD
Supply Voltage
l
2.7 5.5 V
I
DD
V
DD
Supply Current Digital Inputs = 0V or V
DD
l
0.5 2 μA
Digital Inputs
V
IH
Digital Input High Voltage 3.3V ≤ V
DD
≤ 5.5V
2.7V ≤ V
DD
< 3.3V
l
l
2.4
2
V
V
V
IL
Digital Input Low Voltage 4.5V < V
DD
≤ 5.5V
2.7V ≤ V
DD
≤ 4.5V
l
l
0.8
0.6
V
V
Hysteresis Voltage 0.1 V
I
IN
Digital Input Current V
IN
= GND to V
DD
l
±1 µA
C
IN
Digital Input Capacitance V
IN
= 0V (Note 13)
l
6 pF
Digital Outputs
V
OH
I
OH
= 200µA 2.7V ≤ V
DD
≤ 5.5V
l
V
DD
– 0.4 V
V
OL
I
OL
= 200µA 2.7V ≤ V
DD
≤ 5.5V
l
0.4 V
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
= 4.5V to 5.5V
t
1
SDI Valid to SCK Set-Up
l
7 ns
t
2
SDI Valid to SCK Hold
l
7 ns
t
3
SCK High Time
l
11 ns
t
4
SCK Low Time
l
11 ns
t
5
CS/LD Pulse Width
l
9 ns
t
6
LSB SCK High to CS/LD High
l
4 ns
t
7
CS/LD Low to SCK Positive Edge
l
4 ns
t
8
CS/LD High to SCK Positive Edge
l
4 ns
t
9
SRO Propagation Delay C
LOAD
= 10pF
l
18 ns
t
10
CLR Pulse Width Low
l
36 ns
t
11
LDAC Pulse Width Low
l
15 ns
t
12
CLR Low to RFLAG Low C
LOAD
= 10pF (Note 13)
l
50 ns
t
13
CS/LD High to RFLAG High C
LOAD
= 10pF (Note 13)
l
40 ns
SCK Frequency 50% Duty Cycle (Note 14)
l
40 MHz
V
DD
= 2.7V to 3.3V
t
1
SDI Valid to SCK Set-Up
l
9 ns
t
2
SDI Valid to SCK Hold (Note 13)
l
9 ns
t
3
SCK High Time C
L
= 10pF
l
15 ns
t
4
SCK Low Time
l
15 ns
t
5
CS/LD Pulse Width
l
12 ns
t
6
LSB SCK High to CS/LD High
l
5 ns