поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

ADM3232E датащи(PDF) 8 Page - Analog Devices

номер детали ADM3232E
подробное описание детали  Line Driver/Receiver
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADM3232E датащи(HTML) 8 Page - Analog Devices

Back Button ADM3232E_15 Datasheet HTML 4Page - Analog Devices ADM3232E_15 Datasheet HTML 5Page - Analog Devices ADM3232E_15 Datasheet HTML 6Page - Analog Devices ADM3232E_15 Datasheet HTML 7Page - Analog Devices ADM3232E_15 Datasheet HTML 8Page - Analog Devices ADM3232E_15 Datasheet HTML 9Page - Analog Devices ADM3232E_15 Datasheet HTML 10Page - Analog Devices ADM3232E_15 Datasheet HTML 11Page - Analog Devices ADM3232E_15 Datasheet HTML 12Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 8 / 12 page
background image
ADM3232E
Rev. B | Page 8 of 12
THEORY OF OPERATION
The ADM3232E is a single-channel RS-232 line driver/receiver.
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.
CIRCUIT DESCRIPTION
The internal circuitry consists of the following main sections:
A charge pump voltage converter
A 3.3 V logic to RS-232 transmitter
An RS-232 to 3.3 V logic receiver
Charge Pump 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 accomplished
in two stages by using a switched capacitor technique as shown
in Figure 10. 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.
Capacitor C3 and Capacitor 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
Capacitor C1 to Capacitor C4.
C1+
C2+
C1–
C2–
VCC
V–
V+
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
R2IN
TTL/CMOS
INPUTS
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
RS-232
INPUTS*
T1
T2
R1
R2
+
+
C1
0.1µF
10V
C2
0.1µF
10V
GND
ADM3232E
C3
0.1µF
6.3V
+3.3V INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
+6.6V TO –6.6V
VOLTAGE
INVERTER
C5
0.1µF
C4
0.1µF
10V
*INTERNAL 5kΩ PULL-DOWN RESISTOR
ON EACH RS-232 INPUT.
5kΩ
5kΩ
Figure 10. Typical Operating Circuit
C1
+
C3
+
S3
S4
S1
S2
INTERNAL
OSCILLATOR
VCC
GND
VCC
V+ = 2VCC
Figure 11. Charge Pump Voltage Doubler
C2
+
C4
+
S3
S4
S1
S2
INTERNAL
OSCILLATOR
V+
GND
V– = –(V+)
GND
FROM
VOLTAGE
DOUBLER
Figure 12. Charge Pump Voltage Inverter
3.3 V Logic to RS-232 Transmitter
The drivers convert 3.3 V logic input levels into RS-232 output
levels. With VCC = 3.3 V and driving an RS-232 load, the output
voltage swing is typically ±6 V.
RS-232 to 3.3 V Logic Receiver
The receivers are inverting level shifters that accept RS-232 input
levels and translate them into 3 V logic output levels. The inputs
have internal 5 kΩ pull-down resistors to ground and are
pro-
tected against overvoltages up to ±30 V. Unconnected inputs
are pulled to 0 V by the internal 5 kΩ pull-down resistor. This
results in a Logic 1 output level for unconnected inputs or for
inputs connected to GND.
The receivers have Schmitt trigger inputs with a hysteresis level
of 0.4 V. This ensures error-free reception for both noisy inputs
and for inputs with slow transition times.
ESD Protection on RS-232 Pins
All RS-232 (TxOUT and RxIN) inputs and outputs are protected
against electrostatic discharges (up to ±15 kV). This ensures
compliance with IEC 1000-4-2 requirements.
HIGH BAUD RATE
The ADM3232E features high slew rates, permitting data trans-
mission at rates well in excess of the EIA-232E specifications.
RS-232 voltage levels are maintained at data rates up to 460 kbps,
even under worst-case loading conditions. The slew rate is
internally controlled to less than 30 V/μs to minimize EMI
interference.


Аналогичный номер детали - ADM3232E_15

производительномер деталидатащиподробное описание детали
logo
Analog Devices
ADM3232EARNZ AD-ADM3232EARNZ Datasheet
266Kb / 12P
   -15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
REV. 0
ADM3232EARNZ AD-ADM3232EARNZ Datasheet
232Kb / 12P
   ±15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
Rev. B
ADM3232EARNZ-REEL7 AD-ADM3232EARNZ-REEL7 Datasheet
266Kb / 12P
   -15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
REV. 0
ADM3232EARNZ-REEL7 AD-ADM3232EARNZ-REEL7 Datasheet
232Kb / 12P
   ±15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
Rev. B
ADM3232EARUZ AD-ADM3232EARUZ Datasheet
266Kb / 12P
   -15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
REV. 0
More results

Аналогичное описание - ADM3232E_15

производительномер деталидатащиподробное описание детали
logo
Microsemi Corporation
TSC396 MICROSEMI-TSC396 Datasheet
1Mb / 6P
   Line Driver/Receiver
logo
Unisonic Technologies
UT3221 UTC-UT3221 Datasheet
267Kb / 10P
   LINE DRIVER/RECEIVER
logo
System Logic Semiconduc...
SL75232 SLS-SL75232 Datasheet
46Kb / 5P
   Line Driver / Receiver
logo
New Japan Radio
NJU6402B NJRC-NJU6402B Datasheet
222Kb / 7P
   RS232C LINE DRIVER/RECEIVER?
logo
Elantec Semiconductor
EL1501C ELANTEC-EL1501C Datasheet
139Kb / 2P
   Differential Line Driver/Receiver
logo
Texas Instruments
SN75155 TI1-SN75155_14 Datasheet
479Kb / 17P
[Old version datasheet]   LINE DRIVER AND RECEIVER
SN751701 TI-SN751701 Datasheet
237Kb / 14P
[Old version datasheet]   LINE DRIVER AND RECEIVER
SN751701PSRG4 TI-SN751701PSRG4 Datasheet
395Kb / 16P
[Old version datasheet]   LINE DRIVER AND RECEIVER
logo
New Japan Radio
NJU6401B NJRC-NJU6401B Datasheet
223Kb / 7P
   RS232C LINE DRIVER/RECEIVER
logo
Texas Instruments
SN751730 TI-SN751730 Datasheet
127Kb / 8P
[Old version datasheet]   TRIPLE LINE DRIVER/RECEIVER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com