ELECTRICAL CHARACTERISTICS The l denote" />
參數(shù)資料
型號： DC1786A
廠商： Linear Technology
文件頁數(shù)： 32/36頁
文件大?。?/td> 0K
描述： BOARD DEMO LTC2871
設(shè)計資源： DC1786A Design Files
DC1786A Schematic
標(biāo)準(zhǔn)包裝： 1
主要目的： 接口，收發(fā)器，RS-232/RS-485
嵌入式： 否
已用 IC / 零件： LTC2871
主要屬性： 3 個驅(qū)動器，3 個接收器
次要屬性： 3 V ~ 5.5 V 電源
已供物品： 板
相關(guān)產(chǎn)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
5
28701f
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VL = 3.3V, TE485 = 0V, LB = 0V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RTERM
Terminating Resistor
TE485 = VL, A – B = 2V, B = –7V, 0V, 10V
(Figure 8) (Note 5)
l
108
120
156
Ω
RS232 Driver
VOLD
Output Low Voltage
RL = 3kΩ; VEE ≤ –5.9V
l
–5
–5.7
–7.5
V
VOHD
Output High Voltage
RL = 3kΩ; VDD ≥ 6.5V
l
5
6.2
7.5
V
Three-State (High Impedance) Output Current
Y or Z (LTC2870) = ±15V
RS232 Receiver Enabled
DOUT1 or DOUT2 (LTC2871) = ±15V
l
±156
±10
μA
Output Short-Circuit Current
Driver Output = 0V
l
±35
±90
mA
RS232 Receiver
Input Threshold Voltage
l
0.6
1.5
2.5
V
Input Hysteresis
l
0.1
0.4
1.0
V
Output Low Voltage
I(RA, RB, ROUT1, ROUT2) = 1mA (Sinking)
1.7V ≤ VL ≤ 5.5V
l
0.4
V
Output High Voltage
I(RA, RB, ROUT1, ROUT2) = –1mA (Sourcing)
1.7V ≤ VL ≤ 5.5V
l VL – 0.4
V
Input Resistance
–15V ≤ (A, B, RIN1, RIN2) ≤ 15V,
RS232 Receiver Enabled
l
35
7
kΩ
Three-State (High Impedance) Output Current
0V ≤ (RA, RB, ROUT1, ROUT2) ≤ VL
l
0±5
μA
Output Short-Circuit Current
VL = 5.5V
0V ≤ (RA, RB, ROUT1, ROUT2) ≤ VL
l
±25
±50
mA
Logic Inputs
Threshold Voltage
l
0.4
0.75 VL
V
Input Current
l
0±5
μA
Power Supply Generator
VDD
Regulated VDD Output Voltage
RS232 Drivers Enabled, Outputs Loaded with
RL = 3kΩ to GND, DIN1/DY = VL, DIN2/DZ = 0V
(Note 3)
7V
VEE
Regulated VEE Output Voltage
–6.3
V
ESD
LTC2870 Interface Pins (A, B, Y, Z)
Human Body Model to GND or VCC, Powered or
Unpowered (Note 7)
±26
kV
LTC2871 Interface Pins (A, B, Y, Z, RIN1, RIN2,
DOUT1, DOUT2)
±16
kV
All Other Pins
Human Body Model (Note 7)
±4
kV
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