AD230 AD | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 11
Technical content
FEATURES D232 TYPICAL OPERATING CIRCUIT Single 5 V Power Supply Meots All RS-222-C and V.28 Specifications - ‘Multiple Drivers and Receivers ced tae On-Board OC-DC Converters = a a £9V Output Swing with +5 V Supply Fe a ee Low Power CMOS: $ mA Operation tog ew row 74 Low Power Shutdown =1 yA w pe 3-State TTL/CMOS Receiver Outputs Td £30 V Receiver Input Levels Te [>e Aether Plug-in Replacement for MAX230-241 mune" <a Stn comme aon ferns oo <n Modems ct a Lg 1a, | ten Printers tran | | Se” All members of the AID230 family, excepe the ADZ31 and the GENERAL DESCRIPTION AD239, include two ineernal charge pump voltage convertect ‘The AD230 family af V only, RS-232 line drivervreceivers Which allow operation from « single +5 V supply. These con- Provides a variety of configurations to fit most communication verters convert the +5 V input power to the £10 Y required for piteds, expecially in applications where +12 V is not available, RS-232 output levels, The ADZ31 and AD239 are designed to The AD230, AD23$, AD236 and AD241 feature a low power operate from +5 V and +12 V puppies. An internal +12 V to shutdown mode which reduces power dissipation to less than ~12 V charge pump voltage comverter gemetates the 12 V 5 nW making them ideally suited for battery powered equip- ‘supply. ment, The AD233 and AD235 do not require any external com: tn order to minimize the package count in all applications, « Donents and are particularly wscful in applications where printed wide selection of driverireceiver combinations is available (sce cirewlt board apece is critical. table below). SELECTION TABLE No. of | No. of Low Power | TTL Part Power RS-232 | RS-232 External | Shutdown | Three-State | No, of Number | Supply Voltage | Drivers | Receivers | Capacitors | (SD) EN Pies ' Awe | 45V Ye No 20 . ADB | 45 Va 475 No No 4 to 13.2V . ap23z | +sV Ne No 6 AD233 | +5¥ No No 2 | ADIM | +5V No No 16 | ADU3S | +5¥ Yes Yew 4 | AD236 | +5V Yes Yer “ ADa7_ | +5V No No 4 ADz38 | +5¥ No No % ADI | +5V& +29 No Yes Pry Adu | +3¥ Yes Yes B | REV. A COMMUNICATIONS PRODUCTS 4-29
AD230-AD241— SPECIFICATIONS itis, v~s0v-s sx uaa was veers n2¥ ~— AB241% Veg = +5¥ & 5% (ABZII, ABZIS), V+ = TS V to 1329 (M231) & V+ = 12 V = 10% (ADZ94); All Specifications Ty, 10 Tyg tuntnes otbarwise moted,) 1-75-4505 Parameter [ Min | ‘Typ | Max | Unite | Test Coaditions/Comments Output Voltage Swing Es) Es) ‘Volss | All Transmitter Outputs Loaded with 3 kf) to Ground Vee Power Supply Current 4 iC] mA No Load, T, = 25°C a4 1 mA AD231, AD239 V+ Power Supply Current FI 10 | mA | No Load, V+ = 12 V AD231 & AD239 Only Shurdown Supply Catrent 1 wo pA Ty = 428, Ven = #5 V Input Logic Threshold Low, Vises. oe |v Tou EX, SD . Input Logic Threshold High, Vinee 20 v Tow EN, 8D Logic Pullup Carrent 1s | 20 | pA | Ty-0V RS-232 Inpan Volage Range = +m |v RS-232 Input Threshold Low o8 | 12 v Veg * SV, Ty = 425°C RS-232 Input Threshold High 7 }2 | ¥ Veg = $¥,T, = +28°C RS-232 Inpet Hysteresis o2 | Os 1 v Voo = SV RS-232 Input Resistance 5 $ 7 xo Vee = 5V,T, = 425°C TTLUCMOS Output Voltage Low, Vou 4 v Tour * 1.6 mA (AD231-AD233, Loup = 3.2 mA) TTLUCMOS Output Voltage High, Vou | 3.5 v te ‘TTLICMOS Output Leakage Current aos | 210 | uA = Voc: 0V = Rour = Yoo Ouapat Enable Time (Tx) 400 mm AD235, AD236, AD239, AD241 Pigure 25. Cy. = 150 pF) Outpet Disable Time (Tpi9) 20 a AD235, AD236, AD239, ADDL (Piguee 25. Ry = 1&0) Propagation Delay Os a RS-232 0 TTL Instantaneous Siew Rase? 30 | Vins | C= 10 pF, Ry = 3-7 kM, Ty = 429°C ‘Transition Region Siew Rate 3 Vines Ry = 3 kA, C, = 2300 pF Measured from +3 V to -3 Vor -3 V0 +3 V Ounput Resistance OO a Veg = Vt = V— = 0V, Voor = 22 V RS-232 Output Short Circuit Current +10 mA NOTE ‘Sumgle tested im erasure compliance. Specifications wabject 10 change widhowt actice. ABSOLUTE MAXIMUM RATINGS* Power Dissipation Vr ccc cee cree eee eeepececeess 40.3,V to -13 V Operating Temperature Range [nput Voltages ‘Commercial (f Version) 66. sees secre eens Oto + Tay veces cce ee eeapecee ees 03 Vito Woe +03 ¥) Industrial (A Version) os... esses ees 40°C to +89°C Rour ess se res srersess sess “D3 VEO Vor +0.3V) tala tee rzees rating only and functanal operatin of the device a these 6 Short Cirewit Duration . seiy cthte condinione shave thowe indicated ia the operntion sections of this foc extersted periods of tirtm may aflece relabicy. CRU ct = ESD (electrastatic discharge) sensitive device. The digital control inputs are diode protected; WARNING! bowever, permantat damage may occur on unconnected devices subject to high energy electro: — — \\ static fields. Unused devices must be mored in conductive foam ar shuns. The protective foam SPT as stould be discharged to the destination socket before devices are removed. muir 430 COMMUNICATIONS PRODUCTS REV.A
1 OF oy fi Late a
- AD236 OIP Pin Configuration At? |e |
Figure 12. AD235 Typloai Operating Ciroult ve fi] fia] co- SUPE | Mowe HE} + Ran LAGE. Figure 13. AD236 OIPSONC Pin Configuration m a b7™ fs ° Figure 14. AD236 Typical Operating Circuit
3 Be [om
Figure 19. AD239 DYPYSOIC Pin Configuration TI Figure 21. AD241 SOIC Pin Configuration aMb Figure 22. AD241 Typical Operating Circuit
| AD230-AD241 PIN FUNCTION DESCRIFTION T-75~45-05 Maemenic Fanctioa OT Veo Power Supply Input $V + 10% (AD231, AD222, AD23#4, AD2%6, AD238, AD239, AD241), 5 V2 5% (AD233, AD235). ve Internally geaerated positive supply (+10 V nominal) on all parts except AD231 and AD239, ‘AD231 requires external 7,5 V to 13.2 V supply; AD239 requires external 10, V to 13.2 V supply, v= Internally generated atgative supply (—10 V nosinal), GND Ground pin, Must be connected to 0 V. c+ (AD231 und AD239 only), External capacitor (+ terminal) is comnected to this pin. c- (AD231 and AD239 only), External capacitor (— terminal) is consected to this pin, Ci+ (AD230, AD232, AD234, AD236, AD237, AD238, AD241) External capacitor (+ verminal) is connected to this pin. (AD233) The eapaciier is connected internally and 20 external cannection to this pin is required, cl- (AD230, AD232, ADZ34, AD236, AD237, AD238, AD241) External capacitor (~ termial) is connecred to this pin, (AD233) The capacitor is connected internally and no external connection to this pin Is required. Cet (AD230, AD232, AD134, AD236, AD237, AD2Z3$, AD241) External ¢apecitar (+ terminal) is connected to this pin, (AD233) Internal capacior connections, Pins 11 and 13 must be connected together, c= (AD230, AD232, AD234, AD236, AD237, AD2Z38, AD241) Extemnal capacitor (— terminal) is connected to this pin, (ADZ33) Internal capacitor conzectioes, Pins 10 and 16 must be comnected together. Tin ‘Transmitter (Driver) Inputs, These inputs aocept TTLICMOS levels, An insermal 400 kM pull-up resistor to Von is connected an each input, Tour ‘Transmitter (Driver) Outputs, These are RS-232 levels (typically £10 V). Ray Receive Inpats, Theta inputs accept RS-232 signal levels. An imernal $ ki pall-down resistor to GND is connected on inpat. Rour Receiver Outputs. These are TTL/CMOS levels. EN Enable Inpet (AD235, AD236, AD239, AD241), This is an active Sow input which is used to enable the recefver ‘ourputs. With EN = 0 V, the receiver outputs are enabled. With EN = 5 V, the outputs are placed in a high impedance state. This facility is ureful for connecting to microprocessor system, sD Shutdown Inpur, (AD230, AD235, AD236, AD241). With SD = $V, the charge pump is disabled, the receiver carputs are placed in a high impedance state and che driver outputs are turned off. The supply current reduces to <5 mA making these parts ideally suited for battery operation, NC No Connect, No connections are required so this pin. — OO Ss smmeEemS REV. A COMMUNICATIONS PRODUCTS 4-37
in battery powered systams a8 they feature a low power shut- may also be reduced at the expense of higher ourpur impedance . down mode which reduces power dissipation to less than S pW. 08 the V+ and V~ supplies. (ature aa enable (EN) function. When disabled, the receiver ‘The input threshold levels are both TTL und CMOS compatible . CIRCUIT DESCRIPTION inputs may be left unconnected, 25 an intemal 400 Kf pull-up . ‘The internal circuitry im the AD230-AD241 consists of three tesistor pulls them high forcing the outputs into a low sme, . a switching matrix, The converter generates a +10 V supply CMOS levels, The inputs bave imernal $ kf pull-down resistors . Cl as che charge storage element, The 10 V level is thea in- requirement. The low level thresieold is deliberately positive as . Figure 23. Charge-Pump Voltage Doubler the recelver ourputs are placed in a high impedance state and