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參數(shù)資料
| 型號： | ADM3491EARZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485 3.3V FD 14-SOIC |
| 標準包裝： | 1,000 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應商設(shè)備封裝： | 14-SOICN |
| 包裝： | 帶卷 (TR) |
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Rev. A | Page 9 of 20
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
VOC
RL/2
Z
Y
VOD
0
628
4-
00
7
Figure 7. Driver Differential Output Voltage and
Common-Mode Output Voltage
RL
375
VOD
VCM =
–7V TO +12V
D
VCC
0
62
84-
00
8
Figure 8. Driver Differential Output Voltage with
Varying Common-Mode Voltage
VOH
IOH
(–)
VID
R
0
IOL
(+)
VOL
0628
4-
009
Figure 9. Receiver Output Voltage High and Output Voltage Low
IN
OUT
+1.5V
+3V
0V
≈ +2V
≈ –2V
tDD
tTD
50%
10%
90%
D
GENERATOR1
VCC
50
CL
RL =
60
CL = 15pF2
OUT
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO = 50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
06
28
4-
010
Figure 10. Driver Differential Output Delay and Transition Times
3V
0V
VOH
VOL
VOH
VOL
VOM
IN
Y
OUT
Z
OUT
1.5V
tPLH
tPHL
tPLH
D
VOM
RL = 27
OUT
CL = 15pF2
GENERATOR1
VCC
50
S1
VOM =
VOH + VOL
2
≈ 1.5V
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO = 50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
06
28
4-
01
1
Figure 11. Driver Propagation Delays
D
OUT
CL = 50pF2
GENERATOR1
50
S1
VOM =
VOH + VOL
2
≈ 1.5V
RL = 110
0V OR 3V
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO = 50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
0V
VOH
0V
3V
1.5V
0.25V
IN
OUT
VOM
tPZH
tPHZ
0628
4-
012
Figure 12. Driver Enable and Disable Times (tPZH, tPSH, tPHZ)
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