- 您现在的位置：买卖IC网 > PDF目录375258 > ADM2483BRW (ANALOG DEVICES INC) Half-Duplex iCoupler-R Isolated RS-485 Transceiver PDF资料下载
参数资料
| 型号： | ADM2483BRW |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 通用总线功能 |
| 英文描述： | Half-Duplex iCoupler-R Isolated RS-485 Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDSO16 |
| 封装： | MS-013AA, SOIC-16 |
| 文件页数： | 17/20页 |
| 文件大小： | 308K |
| 代理商： | ADM2483BRW |
ADM2483
APPLICATIONS INFORMATION
POWER_VALID INPUT
To avoid glitches on outputs A and B caused by slow power-up
and power-down transients on V
DD1
(>100 μs/V), the ADM2483
features a power_valid (PV) digital input. This pin should be
driven low until V
DD1
exceeds 2.0 V. When V
DD1
is greater than
2.0 V, the pin should be driven high. Conversely, upon power-
down, the PV should be driven low before V
DD1
reaches 2.0 V.
Rev. 0 | Page 17 of 20
The power_valid input can be driven, for example, by the
output of a system reset circuit such as the ADM809Z, which
has a threshold voltage of 2.32 V.
0
V
DD1
2.32V
t
POR
2.0V
2.32V
2.0V
RESET
RESET
ADM809Z
ADM2483
PV
V
DD1
GND
1
V
DD1
Figure 29. Driving PV with ADM809Z
ISOLATED POWER SUPPLY CIRCUIT
The ADM2483 requires isolated power capable of 5 V at 100 mA,
to be supplied between V
DD2
and GND
2
pins. If no suitable
integrated power supply is available, then a discrete circuit, such
as the one in Figure 25, can be used. A center tapped transformer
provides electrical isolation. The primary winding is excited
with a pair of square waveforms that are 180° out of phase with
each other. A pair of Schottky diodes and a smoothing capacitor
are used to create a rectified signal from the secondary winding.
The ADP667 linear voltage regulator provides a regulated
power supply to the ADM2483’s bus-side circuitry.
To create the pair of square waves, a D-type flip-flop with
complementary Q/Q outputs is used. The flip-flop can be
connected so that output Q follows the clock input signal. If no
local clock signal is available, then a simple digital oscillator
may be implemented with a hex inverting Schmitt trigger and
resistor and capacitor. In this case, values of 3.9 kV and 1 nF
generate a 364 kHz square wave. A pair of discrete NMOS
transistors, switched by the Q/Q flip-flop outputs, conduct
current through the center tap of the primary transformer
winding in an alternating fashion.
0
3.9k
100nF
10nF
74HC14
V
CC
74HC74A
PR
CLR
D
Q
CLK
Q
BS107A
BS107A
V
CC
ISOLATION
BARRIER
SD103C
22
μ
F
SD103C
78253
100nF
V
CC
IN
OUT
5V
SET
SHDN
GND
ADP667
V
DD1
V
DD2
GND
1
GND
2
ADM2483
V
CC
Figure 30. Isolated Power Supply Circuit
相关PDF资料 |
PDF描述 |
|---|---|
| ADM2483BRW-REEL | Half-Duplex iCoupler-R Isolated RS-485 Transceiver |
| ADM2490E | High Speed, ESD-Protected, Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
| ADM2490EBRWZ | High Speed, ESD-Protected, Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
| ADM2490EBRWZ-REEL71 | High Speed, ESD-Protected, Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
| ADM3101E | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM2483BRW-REEL | 功能描述:IC TXRX RS-485 ISOLATED 16SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:iCoupler® 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ADM2483BRWZ | 功能描述:IC TXRX RS485 ISOLATED 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:iCoupler® 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ADM2483BRWZ | 制造商:Analog Devices 功能描述:RS-485 IC |
| ADM2483BRWZ-REEL | 功能描述:IC TXRX RS-485 ISOLATED 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:iCoupler® 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ADM2484E | 制造商:AD 制造商全称:Analog Devices 功能描述:500 kbps, ESD Protected, Half-/Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
发布紧急采购，3分钟左右您将得到回复。