參數(shù)資料
型號(hào)： MAX487
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers(250kbps,±15kvESD保護(hù),半雙工,RS-485/RS-232收發(fā)器)
中文描述： 低功耗、限擺率、RS-485/RS-422收發(fā)器
文件頁(yè)數(shù)： 9/16頁(yè)
文件大小： 205K
代理商： MAX487
MAX 483/MAX 487/MAX 488/MAX 489:
Reduc ed EMI and Reflec tions
The MAX483 and MAX487–MAX489 are slew-rate limit-
ed, minimizing EMI and reducing reflections caused by
improperly terminated cables. Figure 12 shows the dri-
ver output waveform and its Fourier analysis of a
150kHz signal transmitted by a MAX481, MAX485,
MAX490, MAX491, or MAX1487. High-frequency har-
monics with large amplitudes are evident. Figure 13
shows the same information displayed for a MAX483,
MAX487, MAX488, or MAX489 transmitting under the
same conditions. Figure 13’s high-frequency harmonics
have much lower amplitudes, and the potential for EMI
is significantly reduced.
M
Low-Power, S lew-Rate-Limited
RS -485/RS -422 Transc eivers
_______________________________________________________________________________________
9
R
R
Y
Z
V
OD
V
OC
RECEIVER
OUTPUT
TEST POINT
1k
1k
S1
S2
V
CC
C
RL
15pF
DI
DE
3V
Y
Z
C
L1
C
L2
A
B
RO
RE
R
DIFF
V
ID
OUTPUT
UNDER TEST
500
S1
S2
V
CC
C
L
_________________________________________________________________Test Circ uits
Figure 4. Driver DC Test Load
Figure 5. Receiver Timing Test Load
Figure 6. Driver/Receiver Timing Test Circuit
Figure 7. Driver Timing Test Load
相關(guān)PDF資料
PDF描述
MAX488 Low-Power, Slew-Rate-Limited RS-485Transceivers(250kbps,全雙工, RS-485收發(fā)器)
MAX492 Dual, Micropower, Single-Supply Rail-to-Rail Op Amps(輸入失調(diào)電壓500μV,單電源滿量程運(yùn)放)
MAX494 Quad, Micropower, Single-Supply Rail-to-Rail Op Amps(輸入失調(diào)電壓500μV,單電源滿量程運(yùn)放)
MAX5003 High-Voltage PWM Power-Supply Controller
MAX5003CEE High-Voltage PWM Power-Supply Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX487C/D 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX487C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX487CPA 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX487CPA+ 功能描述:RS-422/RS-485 接口 IC RS-485/RS-422 Transceiver RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX487CSA 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
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