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参数资料
型号： ADM3202ARW
厂商： Analog Devices Inc
文件页数： 15/16页
文件大小： 0K
描述： IC TXRX DUAL RS-232 3.3V 16SOIC
标准包装： 47
类型： 收发器
驱动器/接收器数： 2/2
规程： RS232
电源电压： 3 V ~ 5.5 V
安装类型： 表面贴装
封装/外壳： 16-SOIC（0.295"，7.50mm 宽）
供应商设备封装： 16-SOIC W
包装： 管件
ADM3202/ADM3222/ADM1385
Rev. E | Page 8 of 16
GENERAL DESCRIPTION
The ADM3202/ADM3222/ADM1385 are RS-232 line drivers/
receivers. Step-up voltage converters coupled with level-shifting
transmitters and receivers allow RS-232 levels to be developed
while operating from a single 3.3 V supply.
CMOS technology is used to keep the power dissipation to an
absolute minimum, allowing maximum battery life in portable
applications.
The ADM3202/ADM3222/ADM1385 are modifications,
enhancements, and improvements of the AD230 to AD241
family and derivatives. They are essentially plug-in compatible
and do not have any materially different applications.
CIRCUIT DESCRIPTION
The internal circuitry consists of these main sections:
A charge pump voltage converter
3.3 V logic to EIA-232 transmitters
EIA-232 to 5 V logic receivers
Charge Pump DC to DC Voltage Converter
The charge pump voltage converter consists of a 200 kHz
oscillator and a switching matrix. The converter generates a
±6.6 V supply from the input 3.3 V level. This is done in two
stages by using a switched capacitor technique as illustrated in
Figure 18 and Figure 19. First, the 3.3 V input supply is doubled
to 6.6 V by using Capacitor C1 as the charge storage element.
The +6.6 V level is then inverted to generate 6.6 V using C2
as the storage element. C3 is shown connected between V+ and
VCC but is equally effective if connected between V+ and GND.
Capacitors C3 and C4 are used to reduce the output ripple.
Their values are not critical and can be increased, if desired.
Capacitor C3 is shown connected between V+ and VCC. It is
also acceptable to connect this capacitor between V+ and GND.
If desired, larger capacitors (up to 10 μF) can be used for
Capacitors C1 to C4.
C1+
C2+
C1–
C2–
VCC
V–
V+
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
R2IN
CMOS
INPUTS
EIA/TIA-232
OUTPUTS
CMOS
OUTPUTS
EIA/TIA-232
INPUTS*
T1
T2
R1
R2
+
0.1F
10V
0.1F
10V
GND ADM3202
C3
0.1F
6.3V
+3.3V INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
+6.6V TO –6.6V
VOLTAGE
INVERTER
C5
0.1F
+
C4
0.1F
10V
+
*INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
00
07
1-
01
5
Figure 15. ADM3202 Typical Operating Circuit
C1+
C2+
C1–
C2–
VCC
V–
V+
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
EN
R2IN
SD
CMOS
INPUTS
EIA/TIA-232
OUTPUTS
CMOS
OUTPUTS
EIA/TIA-232
INPUTS*
T1
T2
R1
R2
+
0.1F
10V
0.1F
10V
GND
ADM3222
C3
0.1F
6.3V
+3.3V INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
+6.6V TO –6.6V
VOLTAGE
INVERTER
C5
0.1F
+
C4
0.1F
10V
+
*INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
00
07
1-
01
6
Figure 16. ADM3222 Typical Operating Circuit
C1+
C2+
C1–
C2–
VCC
V–
V+
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
DD
R2IN
SD
CMOS
INPUTS
EIA/TIA-232
OUTPUTS
CMOS
OUTPUTS
EIA/TIA-232
INPUTS*
T1
T2
R1
R2
+
0.1F
10V
0.1F
10V
GND
ADM1385
+3.3V INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
+6.6V TO –6.6V
VOLTAGE
INVERTER
C5
0.1F
+
*INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
00
071-
01
7
C3
0.1F
10V
C4
0.1F
10V
Figure 17. ADM1385 Typical Operating Circuit
C1
+
C3
+
S3
S4
S1
S2
INTERNAL
OSCILLATOR
VCC
GND
VCC
V+ = 2VCC
00071-018
Figure 18. Charge Pump Voltage Doubler
C2
+
C4
+
S3
S4
S1
S2
INTERNAL
OSCILLATOR
V+
GND
V– = –(V+)
GND
FROM
VOLTAGE
DOUBLER
00071-019
Figure 19. Charge Pump Voltage Inverter
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相关代理商/技术参数
参数描述
ADM3202ARW-REEL 制造商:Analog Devices 功能描述:Dual Transmitter/Receiver RS-232 16-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:3V RS-232 I.C. - Tape and Reel
ADM3202ARW-REEL7 功能描述:IC TXRX DUAL RS-232 3.3V 16SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件
ADM3202ARWZ 功能描述:IC TXRX DUAL RS-232 3.3V 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2
ADM3202ARWZ 制造商:Analog Devices 功能描述:RS-232 IC
ADM3202ARWZ-REEL 功能描述:IC TXRX DUAL RS-232 3.3V 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件
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