TA = 40°C to +" />
參數(shù)資料
型號(hào): ADM1491EBRMZ-REEL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 11/16頁(yè)
文件大?。?/td> 0K
描述: IC TXRX FULLDUP RS485/422 10MSOP
標(biāo)準(zhǔn)包裝: 1,000
類(lèi)型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: RS422,RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 帶卷 (TR)
ADM1490E/ADM1491E
Data Sheet
Rev. D | Page 4 of 16
TIMING SPECIFICATIONS
TA = 40°C to +85°C.
Table 2.
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
Maximum Data Rate
16
Mbps
Propagation Delay
tDPLH, tDPHL
11
17
ns
RL = 54 , CL = 100 pF, see Figure 23 and Figure 3
Driver Output Skew
tSKEW
0.5
2
ns
RL = 54 , CL = 100 pF, see Figure 23 and Figure 3,
tSKEW = |tDPLH tDPHL|
Rise Time/Fall Time
tDR, tDF
8
15
ns
RL = 54 , CL = 100 pF, see Figure 23 and Figure 3
Enable Time
tZH, tZL
20
ns
RL = 110 , CL = 50 pF, see Figure 24 and Figure 5
Disable Time
tHZ, tLZ
20
ns
RL = 110 , CL = 50 pF, see Figure 24 and Figure 5
RECEIVER
Propagation Delay
tPLH, tPHL
12
20
ns
Skew |tPLH tPHL|
tSKEW
0.4
2
ns
Enable Time
tZH, tZL
13
ns
RL = 1 k, CL = 15 pF, see Figure 26 and Figure 6
Disable Time
tHZ, tLZ
13
ns
RL = 1 k, CL = 15 pF, see Figure 26 and Figure 6
Timing Diagrams
Switching Characteristics
Z
Y
VCC/2
tDPLH
tDPHL
1/2VO
VO
90% POINT
10% POINT
90% POINT
VDIFF = V(Y) – V(Z)
tDR
tDF
–VO
VDIFF
+VO
0V
VCC
07430-
009
Figure 3. Driver Propagation Delay Rise/Fall Timing
A – B
RO
0V
1.5V
VOH
VOL
tPLH
tPHL
tSKEW = |tPLH tPHL|
07430-
010
Figure 4. Receiver Propagation Delay Timing
DE
Y, Z
VCC
0V
VOL
VOH
0.5VCC
tZL
tLZ
tZH
tHZ
VOL + 0.5V
VOH – 0.5V
2.3V
07430-
0
1
Figure 5. Driver Enable/Disable Timing
OUTPUT LOW
OUTPUT HIGH
1.5V
RO
RE
0V
0.7VCC
0.3VCC
VOL
VOH
0.5VCC
0.5VCC
tZL
tLZ
tZH
tHZ
VOL + 0.5V
VOH – 0.5V
07430-
012
Figure 6. Receiver Enable/Disable Timing
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