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參數(shù)資料
| 型號(hào)： | ADM3493ARZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS-422/485 3.3V 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 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： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
ADM3493
Rev. 0 | Page 7 of 12
TEST CIRCUITS
RL/2
VOC
A
B
VOD
05
71
5-
0
03
Figure 3. Driver VOD and VOC
VCM =
–7V TO +12V
VCC
RL
375
VOD
D
05
71
5-
00
4
Figure 4. Driver VOD with Varying Common-Mode Voltage
057
15
-00
5
IOH
(–)
IOL
(+)
VOH
VOL
R
0
VID
Figure 5. Receiver VOH and VOL
D
GENERATOR1
VCC
50
CL
RL =
60
CL = 15pF2
05
71
5-
00
6
OUT
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 6. Driver Differential Output Delay and Transition Times
D
VOM
RL =27
OUT
CL = 15pF2
GENERATOR1
VCC
50
S1
VOM =
VOH +VOL
2
≈ 1.5V
05
71
5-
00
7
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 7. Driver Propagation Delays
D
OUT
CL = 50pF2
GENERATOR1
50
S1
VOM =
VOH +VOL
2
≈ 1.5V
RL = 110
0V OR 3V
05
71
5-
00
8
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 8. Driver Enable and Disable Times (tPZH, tPSH, tPHZ)
D
OUT
CL =50pF2
GENERATOR1
50
S1
0V OR 3V
VCC
RL = 110
05
71
5-
009
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 9. Driver Enable and Disable Times (tPZL, tPSL, tPLZ)
0
571
5-
0
10
GENERATOR1
50
CL = 15pF2
R
1.5V
0
VOM =
VCC
2
OUT
VID
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 10. Receiver Propagation Delay
R
GENERATOR1
50
CL2
S3
S1
S2
VCC
+1.5V
–1.5V
VID
1k
0
571
5-
01
1
1PPR = 250kHz, 50% DUTY CYCLE,
tR ≤ 6.0ns, ZO =50.
2CL INCLUDES PROBE AND STRAY CAPACITANCE.
Figure 11. Receiver Enable and Disable Times
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