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参数资料
| 型号： | ADM213 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | +5 V Powered CMOS RS-232 Drivers/Receivers(CMOS RS-232驱动器/接收器) |
| 中文描述： | 5伏的CMOS技术的RS - 232驱动器/接收（的CMOS的RS - 232驱动器/接收器） |
| 文件页数： | 9/12页 |
| 文件大小： | 362K |
| 代理商： | ADM213 |
ADM205–ADM211/ADM213
REV. 0
–9–
10
90
100
0%
5V
0.8 V
A3
5V
5
B
Lw
1Ms
H
Figure 20. Charge Pump, V+, V– Exiting Shutdown
10
90
100
0%
5V
0.8 V
A3
5
B
Lw
5
μ
s
H
Figure 21. Transmitter Output Loaded Slew Rate
10
90
100
0%
5V
0.8 V
A3
5
B
Lw
1
μ
s
H
Figure 22. Transmitter Output Unloaded Slew Rate
GENERAL INFORMATION
The ADM205-ADM211 and ADM213 family of RS-232 driv-
ers/receivers are designed to solve interface problems by meeting
the EIA-232-E specifications while using a single digital +5 V
supply. The EIA-232-E standard requires transmitters which
will deliver
±
5 V minimum on the transmission channel and re-
ceivers which can accept signal levels down to
±
3 V. The
ADM205-ADM211 and ADM213 meet these requirements by
integrating step up voltage converters and level shifting trans-
mitters and receivers onto the same chip. CMOS technology is
used to keep the power dissipation to an absolute minimum. A
comprehensive range of transmitter/receiver combinations is
available to cover most communications needs. The ADM205–
ADM211 and ADM213 are modifications, enhancements and
improvements to the AD230–AD241 family and derivatives
thereof. They are essentially plug-in compatible and do not have
materially different applications.
The ADM205, ADM206, ADM211, and ADM213 are particu-
larly useful in battery powered systems as they feature a low
power shutdown mode which reduces power dissipation to less
than 5
μ
W.
The ADM205 is designed for applications where space saving is
important as the charge pump capacitors are molded into the
package.
The ADM209 includes only a negative charge pump converter
and are intended for applications where a positive 12 V is available.
To facilitate sharing a common line or for connection to a mi-
croprocessor data bus the ADM205, ADM206, ADM209,
ADM211 and ADM213 feature an enable (
EN
) function. When
disabled, the receiver outputs are placed in a high impedance
state.
CIRCUIT DESCRIPTION
The internal circuitry in the ADM205-ADM211 and ADM213
consists of three main sections. These are:
(a) A charge pump voltage converter
(b) RS-232 to TTL/CMOS receivers
(c) TTL/CMOS to RS-232 transmitters
Charge Pump DC-DC Voltage Converter
The charge pump voltage converter consists of an oscillator and
a switching matrix. The converter generates a
±
10 V supply
from the input 5 V level. This is done in two stages using a
switched capacitor technique as illustrated in Figures 23 and 24.
First, the 5 V input supply is doubled to 10 V using capacitor
C1 as the charge storage element. The 10 V level is then in-
verted to generate –10 V using C2 as the storage element.
S1
S3
V+ = 2V
CC
S2
S4
INTERNAL
OSCILLATOR
C1
C3
V
CC
GND
V
CC
Figure 23. Charge-Pump Voltage Doubler
S1
S3
S2
S4
INTERNAL
OSCILLATOR
C2
C4
V– = – (V+)
GND
V+
GND
FROM
VOLTAGE
DOUBLER
Figure 24. Charge-Pump Voltage Inverter
Capacitors C3 and C4 are used to reduce the output ripple.
Their values are not critical and can be reduced if higher levels
of ripple are acceptable. The charge pump capacitors C1 and
C2 may also be reduced at the expense of higher output imped-
ance on the V+ and V– supplies.
The V+ and V– supplies may also be used to power external cir-
cuitry if the current requirements are small.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM213AR | 功能描述:IC TXRX RS-232 5V 0.1UF 28SOIC 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: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 |
| ADM213AR-REEL | 制造商:Analog Devices 功能描述:Quad Transmitter Quint Receiver RS-232 28-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:O.1UF LINE DRIVER - I.C. - Tape and Reel |
| ADM213ARS | 功能描述:IC TXRX RS-232 5V 0.1UF 28SSOP 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: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 |
| ADM213ARS-REEL | 功能描述:IC TXRX RS-232 5V 0.1UF 28SSOP 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 |
| ADM213ARSZ | 功能描述:IC TXRX RS-232 5V 0.1UF 28SSOP 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 |
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