Datasheet

LTC2704
5
2704fd
The l denotes specifi cations which apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The notation V
+
is used to denote both V
+
1
and V
+
2
when the same
voltage is applied to both pins.
Note 3: Guaranteed by design, not subject to test.
Note 4: Measured in unipolar 0V to 5V mode.
Note 5: When using SRO, maximum SCK frequency f
MAX
is limited by SRO
propagation delay as follows:
f
MAX
=
1
2t
9
+ t
S
()








, where t
s
is the setup time of the receiving device.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
C
IN
Digital Input Capacitance V
IN
= 0V (Note 3)
l
5pF
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
= 4.5V to 5.5V
t
1
SDI Valid to SCK Setup
l
7ns
t
2
SDI Valid to SCK Hold
l
7ns
t
3
SCK High Time
l
11 ns
t
4
SCK Low Time
l
11 ns
t
5
CS/LD Pulse Width
l
9ns
t
6
LSB SCK High to CS/LD High
l
0ns
t
7
CS/LD Low to SCK Positive Edge
l
12 ns
t
8
CS/LD High to SCK Positive Edge
l
12 ns
t
9
SRO Propagation Delay C
LOAD
= 10pF
l
18 ns
t
10
CLR Pulse Width
l
50 ns
t
11
LDAC Pulse Width
l
15 ns
t
12
CLR Low to RFLAG Low C
LOAD
= 10pF (Note 3)
l
50 ns
t
13
CS/LD High to RFLAG High C
LOAD
= 10pF (Note 3)
l
40 ns
SCK Frequency 50% Duty Cycle (Note 5)
l
40 MHz
V
DD
= 2.7V to 3.3V
t
1
SDI Valid to SCK Setup
l
9ns
t
2
SDI Valid to SCK Hold
l
9ns
t
3
SCK High Time
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
0ns
t
7
CS/LD Low to SCK Positive Edge
l
12 ns
t
8
CS/LD High to SCK Positive Edge
l
12 ns
t
9
SRO Propagation Delay C
LOAD
= 10pF
l
26 ns
t
10
CLR Pulse Width
l
90 ns
t
11
LDAC Pulse Width
l
20 ns
t
12
CLR Low to RFLAG Low C
LOAD
= 10pF
l
70 ns
t
13
CS/LD High to RFLAG High C
LOAD
= 10pF
l
60 ns
SCK Frequency 50% Duty Cycle (Note 5)
l
25 MHz
TIMING CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations which apply over the full operating
temperature range, otherwise specifi cations are T
A
= 25°C, V
+
1
= V
+
2
= 15V, V
–
= –15V, V
DD
= 5V, REF1 = REF2 = 5V, AGND = AGNDx =
REFG1 = REFG2 = GND = 0V.