Datasheet

4
LTC1685
TYPICAL PERFORMANCE CHARACTERISTICS
UW
FREQUENCY (Hz)
10
42.0
COMMON MODE REJECTION RATIO (dB)
42.5
43.5
44.0
44.5
46.5
1685 G01
43.0
1k 100k 1M
45.0
45.5
46.0
T
A
= 25°C
Receiver Input CMRR
TEMPERATURE (°C)
–50 –25
SUPPLY CURRENT (mA)
53
54
55
50
100
1685 G03
52
51
50
025 75
56
57
59
58
BOTH DRIVER AND RECEIVER
ENABLED AND LOADED
25Mbps DATA RATE
DATA RATE (Mbps)
1
50
60
70
4030
1685 G02
40
30
10 20 50
20
10
0
SUPPLY CURRENT (mA)
BOTH DRIVER AND RECEIVER
ENABLED AND LOADED
T
A
= 25°C
Supply Current vs Data Rate
Supply Current vs Temperature
Receiver Propagation Delay
vs Load Capacitance
Receiver Propagation Delay
vs Common Mode
LOAD CAPACITANCE (pF)
5
0
PROPAGATION DELAY (ns)
5
10
15
20
30
15
25 35 55
1685 G04
105 205
25
T
A
= 25°C
RECEIVER COMMON MODE (V)
–7
0
PROPAGATION DELAY (ns)
5
15
20
25
–2
2
412
1685 G05
10
–4 0
6
8
10
T
A
= 25°C
Receiver Propagation Delay
vs Input Overdrive
RECEIVER INPUT OVERDRIVE (V)
0.3 0.5
0
RECEIVER PROPAGATION DELAY (ns)
10
25
0.7
1.25
1.5
1685 G06
5
20
15
1.0
2.0
2.5
T
A
= 25°C
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into the device pins are positive; all currents out of the
device pins are negative.
Note 3: All typicals are given for V
DD
= 5V, T
A
= 25°C.
Note 4: Guaranteed by design, but not tested.
Note 5: Short-circuit current does not represent output drive capability.
When the output detects a short-circuit condition, output drive current is
significantly reduced (from hundreds of mA to 20mA max) until the short
is removed.
SWITCHING CHARACTERISTICS
U