参数资料
型号: DC1786A
厂商: Linear Technology
文件页数: 35/36页
文件大小: 0K
描述: BOARD DEMO LTC2871
设计资源: DC1786A Design Files
DC1786A Schematic
标准包装: 1
主要目的: 接口,收发器,RS-232/RS-485
嵌入式:
已用 IC / 零件: LTC2871
主要属性: 3 个驱动器,3 个接收器
次要属性: 3 V ~ 5.5 V 电源
已供物品:
相关产品: LTC2871CUHF#PBF-ND - IC TXRX RS485/RS422 38-QFN
LTC2871IUHF#PBF-ND - IC TXRX RS485/RS422 38-QFN
LTC2871CFE#PBF-ND - IC TXRX RS485/RS422 38-TSSOP
LTC2871IFE#PBF-ND - IC TXRX RS485/RS422 38-TSSOP
LTC2871CUHF#TRPBF-ND - IC TXRX RS485/RS422 38-QFN
LTC2871IFE#TRPBF-ND - IC TXRX RS485/RS422 38-TSSOP
LTC2871IUHF#TRPBF-ND - IC TXRX RS485/RS422 38-QFN
LTC2871CFE#TRPBF-ND - IC TXRX RS485/RS422 38-TSSOP
LTC2870/LTC2871
8
28701f
TYPICAL PERFORMANCE CHARACTERISTICS
RS232 Receiver Input Threshold
vs Temperature
RS232 Receiver Output Voltage
vs Load Current
RS485 Termination Resistance
vs Temperature
RS232 Operation at 500kbps
RS485 Operation at 20Mbps
LTC2870 Drivers Changing Modes
RS485 Receiver Propagation
Delay vs Temperature
RS485 Receiver Skew
vs Temperature
RS485 Receiver Output Voltage
vs Load Current
TEMPERATURE (°C)
–50
DELA
Y
(ns)
80
70
60
50
40
50
75
–25
28701 G10
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
SKEW
(ns)
3.0
2.5
2.0
1.0
1.5
0.5
0
50
75
–25
28701 G11
100
25
0
OUTPUT CURRENT (mA)
0
OUTPUT
VOL
TAGE
(V)
6
5
4
2
3
1
0
8
2
28701 G12
10
6
4
VL = 5V
VL = 3.3V
VL = 1.7V
TEMPERATURE (°C)
–50
THRESHOLD
VOL
TAGE
(V)
2.0
1.8
1.6
1.4
1.2
1.0
50
75
–25
28701 G13
100
25
0
VCC = 5V
VCC = 3.3V
INPUT HIGH
INPUT LOW
OUTPUT CURRENT (mA)
0
OUTPUT
VOL
TAGE
(V)
6
5
4
2
3
1
0
8
2
28701 G14
10
6
4
VL = 5V
VL = 3.3V
VL = 1.7V
TEMPERATURE (°C)
–50
RESIST
ANCE
(Ω)
130
118
116
114
112
110
128
126
124
122
120
50
75
–25
28701 G15
100
25
0
VCM = –7V
VCM = 2V
VCM = 12V
WRAPPING DATA
DOUT LOADS: 5kΩ + 50pF
5V/DIV
28701 G16
1μs/DIV
DOUT1
DOUT2
ROUT1
ROUT2
DIN1
DIN2
H/F HIGH
Y, Z LOADS: 120Ω (DIFF) + 50pF
1V/DIV
5V/DIV
28701 G17
20ns/DIV
RO
Y
DI
Z
5V/DIV
28701 G18
2μs/DIV
RS232
MODE
RS485
MODE
RS232
MODE
Y
485/232
Z
TA = 25°C, VCC = VL = 3.3V, unless otherwise noted.
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