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LTC2802 데이터시트(PDF) 7 Page - Analog Devices

부품명 LTC2802
상세설명  Single-Bus RS485/RS232 Multiprotocol Transceiver with Switchable Termination
PDF  32 Pages
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LTC2873
7
REV B
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
VCC Supply Current vs Supply
Voltage in Shutdown Mode
VCC Supply Current vs Supply
Voltage in RDY Mode
VCC Supply Current
vs RS485 Data Rate
TA = 25°C, VCC = VL = 3.3V, unless otherwise noted.
VCC Supply Current vs RS232
Data Rate in Slow Mode
VCC Supply Current vs RS232
Data Rate in Fast Mode
RS485 Driver Differential Output
Voltage vs Temperature
RS485 Driver Propagation Delay
vs Temperature
RS485 Driver Skew
vs Temperature
RS485 Driver Short-Circuit
Current vs Short-Circuit Voltage
SUPPLY VOLTAGE (V)
3
3.5
4
4.5
5
5.5
5
6
7
8
9
10
11
12
13
14
15
2873 G01
SUPPLY VOLTAGE (V)
3
5
4
3
2
1
4.5
5
3.5
2873 G02
5.5
4
–40°C
25°C
85°C
DRIVER, RECEIVER AND TERMINATOR
DISABLED
DATA RATE (Mbps)
0.1
100
80
60
40
20
0
10
2873 G03
100
1
TE485 LOW
TE485 HIGH
VCC = 5V
VCC = 3.3V
RS485 DRIVER
AND RECEIVER
SWITCHING.
CL = 100pF ON EACH
DRIVER OUTPUT.
2.5nF
2.5nF
1nF
1nF
75pF
75pF
VARIOUS LOADS
A/DO TIED TO B/RI
RECEIVER ENABLED
DRIVER AND
VCC = 5V
VCC = 3.3V
DATA RATE (kbps)
0
50
100
150
200
250
4
8
12
16
20
2873 G04
2.5nF
2.5nF
1nF
1nF
75pF
75pF
VARIOUS LOADS
A/DO TIED TO B/RI
RECEIVER ENABLED
250pF
250pF
DRIVER AND
VCC = 5V
VCC = 3.3V
DATA RATE (kbps)
0
200
400
600
800
1000
4
8
12
16
20
24
2873 G05
TEMPERATURE (°C)
–50
4.5
3.5
2.5
1.5
4.0
3.0
2.0
1.0
0.5
0
50
75
–25
2873 G06
100
25
0
RL = 100Ω
RL = 54Ω
RL = 100Ω
RL = 54Ω
VCC = 5V
VCC = 3.3V
TEMPERATURE (°C)
–50
50
40
30
20
10
0
50
75
–25
2873 G07
100
25
0
VCC = 3.3V, VL = 1.7V
VCC = 5V, VL = 1.7V
VCC = 3.3V, VL = 3.3V
VCC = 5V, VL = 5V
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2873 G08
OUTPUT LOW
OUTPUT HIGH
SHORT–CIRCUIT VOLTAGE (V)
–15
–10
–5
0
5
10
15
–150
–100
–50
0
50
100
150
2873 G09
VCC = 5V
VCC = 3.3V



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