Linear Technology LTC2756 18-Bit SoftSpan IOUT DAC with Serial SPI Interface Demo Board, req DC590B DC1792 DC1792 数据表
产品代码
DC1792
LTC2756
4
2756f
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
IN
) = 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
V
DD
Supply Voltage
l
2.7
5.5
V
I
DD
Supply Current, V
DD
Digital Inputs = 0V or V
DD
l
0.5
1
μA
Digital Inputs
V
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 12)
l
6
pF
Digital Outputs
V
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 12)
l
50
ns
t
13
CS/LD High to RFLAG High
C
LOAD
= 10pF (Note 12)
l
40
ns
SCK Frequency
50% Duty Cycle (Note 13)
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
l
9
ns
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
5
ns