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參數(shù)資料
| 型號： | ADM3202 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| 中文描述： | 單電源RS232C接口線路驅(qū)動器/接收器（單電源RS232C接口線收發(fā)器（2發(fā)2收）） |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM3202AN | 功能描述:IC TXRX DUAL RS-232 3.3V 16DIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:121 系列:- 類型:收發(fā)器 驅(qū)動器/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:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
| ADM3202ANZ | 功能描述:IC TXRX DUAL RS232 3.3V 16DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱: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 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:121 系列:- 類型:收發(fā)器 驅(qū)動器/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:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
| ADM3202ARN-REEL | 功能描述:IC TXRX DUAL RS-232 3.3V 16SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:121 系列:- 類型:收發(fā)器 驅(qū)動器/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:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
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