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参数资料
型号： ADM3202
厂商： Analog Devices, Inc.
元件分类： 外设及接口
英文描述： Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述： 单电源RS232C接口线路驱动器/接收器（单电源RS232C接口线收发器（2发2收））
文件页数： 6/8页
文件大小： 159K
代理商： ADM3202
ADM3202/ADM3222/ADM1385
–6–
REV. 0
GE NE RAL DE SCRIPT ION
T he 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.
T he ADM3202/ADM3222/ADM1385 is a modification, en-
hancement and improvement to the AD230–AD241 family and
its derivatives. It is essentially plug-in compatible and does not
have materially different applications.
CIRCUIT DE SCRIPT ION
T he internal circuitry consists of three main sections. T hese are:
1. A charge pump voltage converter
2. 3.3 V logic to EIA-232 transmitters
3. EIA-232 to 5 V logic receivers.
Charge Pump DC-DC Voltage Converter
T he charge pump voltage converter consists of a 200 kHz oscil-
lator and a switching matrix. T he converter generates a
±
6.6 V
supply from the input +3.3 V level. T his is done in two stages
using a switched capacitor technique as illustrated below. First,
the +3.3 V input supply is doubled to +6.6 V using capacitor
C1 as the charge storage element. T he +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 V
CC
, but is equally effec-
tive if connected between V+ and GND.
Capacitors C3 and C4 are used to reduce the output ripple.
T heir values are not critical and can be increased if desired.
Capacitor C3 is shown connected between V+ and V
CC
. It is
also acceptable to connect this capacitor between V+ and GND.
If desired, larger capacitors (up to 10
μ
F) can be used for ca-
pacitors C1–C4.
+3.3V TO +6.6V
VOLTAGE
DOUBLER
C1+
C1–
C5
0.1
m
F
+
V
CC
V+
0.1
F
10V
+
+0.1
m
F
6.3V
+3.3V INPUT
+6.6V TO –6.6V
VOLTAGE
INVERTER
C2+
C2–
+
V–
0.1
F
10V
+
C4
0.1
m
F
10V
T1
OUT
T1
IN
T2
OUT
T2
IN
EIA/TIA-232
OUTPUTS
R1
OUT
R2
OUT
R1
IN
R2
IN
EIA/TIA-232
INPUTS*
CMOS
INPUTS
CMOS
OUTPUTS
ADM3202
GND
*INTERNAL 5k
PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
C1+
C1–
C5
0.1
m
F
+
V
CC
V+
0.1
F
10V
+
+0.1
m
F
6.3V
+3.3V INPUT
+6.6V TO –6.6V
VOLTAGE
INVERTER
C2+
C2–
+
V–
0.1
F
10V
+
C4
0.1
m
F
10V
T1
OUT
T1
IN
T2
OUT
T2
IN
EIA/TIA-232
OUTPUTS
R1
OUT
R2
OUT
R1
IN
R2
IN
EIA/TIA-232
INPUTS*
CMOS
INPUTS
CMOS
OUTPUTS
ADM3222
GND
*INTERNAL 5k
PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
T1
T2
R2
R1
T1
T2
R2
R1
EN
SD
+3.3V TO +6.6V
VOLTAGE
DOUBLER
C1+
C1–
C5
0.1
m
F
+
V
CC
V+
0.1
F
10V
+
C3
0.1
m
F
6.3V
+3.3V INPUT
+6.6V TO –6.6V
VOLTAGE
INVERTER
C2+
C2–
+
V–
0.1
F
10V
+
C4
0.1
m
F
10V
T1
OUT
T1
IN
T2
OUT
T2
IN
EIA/TIA-232
OUTPUTS
R1
OUT
R2
OUT
R1
IN
R2
IN
EIA/TIA-232
INPUTS*
CMOS
INPUTS
CMOS
OUTPUTS
ADM1385
GND
*INTERNAL 5k
PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
T1
T2
R2
R1
DD
SD
+
Figure 8. Typical Operating Circuits
1
m
s/DIV
T1
2V/DIV
T1
5V/DIV
Figure 7. 230 kbps Data Transmission
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相关代理商/技术参数
参数描述
ADM3202AN 功能描述:IC TXRX DUAL RS-232 3.3V 16DIP 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
ADM3202ANZ 功能描述:IC TXRX DUAL RS232 3.3V 16DIP 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
ADM3202ANZ 制造商:Analog Devices 功能描述:RS-232 IC
ADM3202ARN 功能描述:IC TX/RX 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
ADM3202ARN-REEL 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
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