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emi/emc-compliant, 15 kv esd-protected, rs-232 line drivers/receivers adm206e/adm207e/adm208e/adm211e/adm213e rev. e information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2006 analog devices, inc. all rights reserved. features complies with 89/336/eec emc directive esd protection to iec 1000-4-2 (801-2) contact discharge: 8 kv air-gap discharge: 15 kv human body model: 15 kv eft/burst immunity (iec 1000-4-4) low emi emissions (en 55022) eliminates need for transzorb? suppressors 230 kbps data rate guaranteed single 5 v power supply shutdown mode 1 w plug-in upgrade for max2xxe space saving tssop package available applications laptop computers notebook computers printers peripherals modems general description the adm2xxe is a family of robust rs-232 and v.28 interface devices that operate from a single 5 v power supply. these pro- ducts are suitable for operation in harsh electrical environments and are compliant with the eu directive on electromagnetic compatibility (emc) (89/336/eec). the level of emissions and immunity are both in compliance. em immunity includes esd protection in excess of 15 kv on all i/o lines (iec 1000-4-2), fast transient burst protection (iec 1000-4-4), and radiated immunity (iec 1000-4-3). em emissions include radiated and conducted emissions as required by information technology equipment en 55022, cispr 22. all devices fully conform to the eia-232-e and ccitt v.28 specifications and operate at data rates up to 230 kbps. shut- down and enable control pins are provided on some of the products (see table 1 ). the shutdown function on the adm211e disables the charge pump and all transmitters and receivers. on the adm213e the connection diagram 0.1f 6.3v + + 0.1f 5 v input + 0.1f 10v 0.1f 10v + 0.1f 10v + t1 t2 t3 t4 r1 r2 r3 r4 r5 gnd adm211e/ adm213e t1 in t2 in t3 in t4 in r1 out r2 out r3 out r4 out r5 out t1 out t2 out t3 out t4 out r1 in r2 in r3 in r4 in r5 in shdn (adm211e) shdn (adm213e) ttl/cmos inputs 1 t tl/cmos outputs rs-232 outputs rs-232 inputs 2 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. c1+ c1? c2+ c2? v cc v+ v? en (adm211e) en (adm213e) 12 14 15 16 11 13 17 2 3 1 28 9 4 27 23 18 25 7 6 20 21 8 5 26 22 19 24 10 0 0068-001 +5v to +10v voltage doubler +10v to ?10v voltage inverter figure 1. charge pump, all transmitters, and three of the five receivers are disabled. the remaining two receivers remain active, thereby allowing monitoring of peripheral devices. this feature allows the device to be shut down until a peripheral device begins communication. the active receivers can alert the processor, which can then take the adm213e out of the shutdown mode. operating from a single 5 v supply, four external 0.1 f capacitors are required. the adm207e and adm208e are available in 24-lead pdip, ssop, available in 28-lead ssop, tssop, and soic_w packages. all products are backward compatible with earlier adm2xx products, facilitating easy upgrading of older designs. table 1. selection table model supply voltage drivers receivers esd protection shutdown enable packages adm206e 5 v 4 3 15 kv yes yes rw-24 adm207e 5 v 5 3 15 kv no no n-24-1, rw-24, rs-24, ru-24 adm208e 5 v 4 4 15 kv no no n-24-1, rw-24, rs-24, ru-24 adm211e 5 v 4 5 15 kv yes yes rw-28, rs-28, ru-28 adm213e 5 v 4 5 15 kv yes ( shdn ) 1 yes (en) rw-28, rs-28, ru-28 1 two receivers active.
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 2 of 20 table of contents features .............................................................................................. 1 applications....................................................................................... 1 general description ......................................................................... 1 connection diagram ....................................................................... 1 revision history ............................................................................... 2 specifications..................................................................................... 3 absolute maximum ratings............................................................ 4 esd caution.................................................................................. 4 pin configurations and function descriptions ........................... 5 typical performance characteristics ............................................. 8 theory of operation ...................................................................... 10 circuit description..................................................................... 10 enable and shutdown ................................................................ 10 high baud rate........................................................................... 11 esd/eft transient protection scheme .................................. 11 esd testing (iec 1000-4-2) ..................................................... 11 eft/burst testing (iec 1000-4-4)........................................... 12 iec 1000-4-3 radiated immunity ........................................... 13 emissions/interference .............................................................. 14 conducted emissions ................................................................ 14 radiated emissions .................................................................... 14 outline dimensions ....................................................................... 16 ordering guide .......................................................................... 19 revision history 9 /06rev. d to rev. e updated format..................................................................universal changes to figure 1 and table 1..................................................... 1 changes to table 2............................................................................ 3 changes to figure 2, figure 3, and figure 5.................................. 5 changes to figure 7 and figure 9................................................... 6 changes to figure 11........................................................................ 7 changes to figure 17........................................................................ 8 updated outline dimensions ....................................................... 16 changes to ordering guide .......................................................... 19 4/05rev. c to rev. d changes to specifications section.................................................. 2 changes to ordering guide ............................................................ 4 updated outline dimensions ......................................................... 6 3/01rev. b to rev. c changes to features section ............................................................1 changes to specifications table ......................................................2 changes to absolute maximum ratings........................................3 changes to figure 6 ..........................................................................5 changes to typical performance characteristics section ...... 7, 8 changes to table v......................................................................... 11
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 3 of 20 specifications v cc = 5.0 v 10%, c1 to c4 = 0.1 f. all specifications t min to t max , unless otherwise noted. table 2. parameter min typ max unit test conditions/comments dc characteristics operating voltage range 4.5 5.0 5.5 v v cc power supply current 3.5 13 ma no load shutdown supply current 0.2 10 a logic input pull-up current 10 25 a t in = gnd input logic threshold low, v inl 0.8 v t in , en, en , shdn, shdn input logic threshold high, v inh 2.0 v t in input logic threshold high, v inh 2.0 v en, en , shdn, shdn ttl/cmos output voltage low, v ol 0.4 v i out = 1.6 ma ttl/cmos output voltage high, v oh 3.5 v i out = ?40 a ttl/cmos output leakage current +0.05 10 a en = v cc , en = gnd, 0 v r out v cc rs-232 receiver input voltage range 1 ?30 +30 v input threshold low 0.8 1.3 v input threshold high 2.0 2.4 v input hysteresis 0.65 v input resistance 3 5 7 k t a = 0c to 85c rs-232 transmitter output voltage swing 5.0 9.0 v all trans mitter outputs loaded with 3 k to ground output resistance 300 v cc = 0 v, v out = 2 v output short-circuit current 6 20 60 ma timing characteristics maximum data rate 230 kbps r l = 3 k to 7 k, c l = 50 pf to 2500 pf receiver propagation delay, tphl, tplh 0.4 2 s c l = 150 pf receiver output enable time, t er 120 ns receiver output disable time, t dr 120 ns transmitter propagation delay, tphl, tplh 1 s r l = 3 k, c l = 2500 pf transition region slew rate 8 v/s r l = 3 k, c l = 50 pf to 2500 pf, measured from +3 v to ?3 v or ?3 v to +3 v em immunity esd protection (i/o pins) 15 kv human body model 15 kv iec 1000-4-2 air-gap discharge 8 kv iec 1000-4-2 contact discharge radiated immunity 10 v/m iec 1000-4-3 1 guaranteed by design. table 3. adm211e truth table shdn en status t out 1:4 r out 1:5 0 0 normal operation enabled enabled 0 1 normal operation enabled disabled 1 x 1 shutdown disabled disabled 1 x = dont care. table 4. adm213e truth table shdn en status t out 1:4 r out 1:3 r out 4:5 0 0 shutdown disabled disabled disabled 0 1 shutdown disabled disabled enabled 1 0 normal operation enabled disabled disabled 1 1 normal operation en abled enabled enabled
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 4 of 20 absolute maximum ratings t a = 25c, unless otherwise noted. table 5. parameter rating v cc ?0.3 v to +6 v v+ (v cc C 0.3 v) to +14 v vC +0.3 v to ?14 v input voltages t in ?0.3 v to (v+ + 0.3 v) r in 30 v output voltages t out 15 v r out ?0.3 v to (v cc + 0.3 v) short-circuit duration t out continuous power dissipation n-24-1 pdip (derate 13.5 mw/c above 70c) 1000 mw rw-24 soic_w (derate 12 mw/c above 70c) 900 mw rs-24 ssop (derate 12 mw/c above 70c) 850 mw ru-24 tssop (derate 12 mw/c above 70c) 900 mw rw-28 soic_w (derate 12 mw/c above 70c) 900 mw rs-28 ssop (derate 10 mw/c above 70c) 900 mw ru-28 tssop (derate 12 mw/c above 70c) 900 mw operating temperature range ?40c to +85c storage temperature range ?65c to +150c lead temperature, soldering (10 sec) 300c esd rating mil-std-883b (i/o pins) 15 kv iec 1000-4-2 air-gap (i/o pins) 15 kv iec 1000-4-2 contact (i/o pins) 8 kv stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. esd caution
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 5 of 20 pin configurations and function descriptions top view (not to scale) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 adm206e c1? v+ c1+ v cc gnd t3 out t1 out t2 out r1 in t1 in t2 in r1 out c2+ c2? v? r3 in r3 out t4 out r2 in r2 out shdn t3 in t4 in en 00068-002 figure 2. adm206e pin configuration +5v to +10v voltage doubler 0.1f 6.3v + + 0.1f 5v inpu t + 0.1f 16v 0.1f 6.3v + 0.1f 16v + t1 t2 t3 t4 r1 r2 r3 gnd adm206e t1 in t2 in t3 in t4 in r1 out r2 out r3 out t1 out t2 out t3 out t4 out r1 in r2 in r3 in shdn ttl/cmos inputs 1 t tl/cmos outputs rs-232 outputs rs-232 inputs 2 c1+ c1? c2+ c2? v+ v? en 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 0 0068-003 +10v to ?10v voltage inverter v cc figure 3. adm206e typical operating circuit top view (not to scale) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 adm207e c1? v+ c1+ v cc gnd t3 out t1 out t2 out r1 in t1 in t2 in r1 out c2+ c2? v? r3 in r3 out t4 out r2 in r2 out t5 in t3 in t4 in t5 out 00068-004 figure 4. adm207e pin configuration +10v to ?10v voltage inverter +5v to +10v voltage doubler 0.1f 6.3v + + 0.1f 5v inpu t + 0.1f 10v 0.1f 10v + 0.1f 10v + t1 t2 t3 t4 r1 r2 r3 gnd adm207e t1 in t2 in t3 in t4 in r1 out r2 out r3 out t1 out t2 out t3 out t4 out r1 in r2 in r3 in ttl/cmos inputs 1 t tl/cmos outputs rs-232 outputs rs-232 inputs 2 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. c1+ c1? c2+ c2? v cc v+ v? t5 t5 in t5 out 24 23 20 16 15 4 8 9 11 19 18 14 13 21 6 7 10 12 1 3 2 00068-005 5 17 22 figure 5. adm207e typical operating circuit
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 6 of 20 top view (not to scale) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 adm208e c1? v+ c1+ v cc gnd t2 out t1 out r2 in r2 out r1 in r1 out t1 in c2+ c2? v? r4 in r4 out t3 out r3 in r3 out t4 in t2 in t3 in t4 out 00068-006 figure 6. adm208e pin configuration +5v to +10v voltage doubler +10v to ?10v voltage inverter 0.1f 6.3v + + 0.1f 5v inpu t + 0.1f 10v 0.1f 10v + 0.1f 10v + t1 t2 t3 t4 r1 r2 r3 r4 gnd adm208e t1 in t2 in t3 in t4 in r1 out r2 out r3 out r4 out t1 out t2 out t3 out t4 out r1 in r2 in r3 in r4 in ttl/cmos inputs 1 ttl/cmos outputs rs-232 outputs rs-232 inputs 2 c1+ c1? c2+ c2? v cc v+ v? 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. 20 23 7 16 15 3 9 11 4 17 21 19 22 14 13 6 18 5 10 12 24 1 2 8 0 0068-007 figure 7. adm208e typical operating circuit top view (not to scale) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 adm211e t3 out t1 out t4 out r3 in t2 out r2 in r3 out shdn r2 out t2 in r4 in t1 in r1 out r4 out t4 in r1 in gnd t3 in r5 out v cc c1+ r5 in v? v+ c1? c2? c2+ en 00068-008 figure 8. adm211e pin configuration 0.1f 10v 0.1f 10v 0.1f 10v ttl/cmos inputs 1 ttl/cmos outputs rs-232 outputs rs-232 inputs 2 0.1f 6.3v + + 0.1f 5v inpu t + + + t1 t2 t3 t4 r1 r2 r3 r4 r5 gnd adm211e t1 in t2 in t3 in t4 in r1 out r2 out r3 out r4 out r5 out t1 out t2 out t3 out t4 out r1 in r2 in r3 in r4 in r5 in shdn c1+ c1? c2+ c2? v cc v+ v? en 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. 23 25 4 9 18 3 2 27 28 1 17 11 13 22 24 5 8 19 6 7 26 21 20 15 16 12 14 10 00068-009 +5v to +10v voltage doubler +10v to ?10v voltage inverter figure 9. adm211e typical operating circuit
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 7 of 20 top view (not to scale) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 adm213e t3 out t1 out t4 out r3 in t2 out r2 in r3 out r2 out t2 in en r4 in 1 t1 in r1 out r4 out 1 t4 in r1 in gnd t3 in r5 out 1 v cc c1+ r5 in 1 v? v+ c1? c2? c2+ 1 active in shutdown. shdn 00068-010 figure 10. adm213e pin configuration 0.1f 16v 0.1f 16v +5v to +10v voltage doubler +10v to ?10v voltage inverter ttl/cmos inputs 1 ttl/cmos outputs rs-232 outputs rs-232 inputs 2 + + 0.1f 5v inpu t + + + t1 t2 t3 t4 r1 r2 r3 r4 r5 gnd adm213e t1 in t2 in t3 in t4 in r1 out r2 out r3 out r4 out 3 r5 out 3 en t1 out t2 out t3 out t4 out r1 in r2 in r3 in r4 in 3 r5 in 3 c1+ c1? c2+ c2? v cc v+ v? shdn 1 internal 400k ? pull-up resistor on each ttl/cmos input. 2 internal 5k ? pull-down resistor on each rs-232 input. 3 active in shutdown. 23 25 4 9 18 3 2 27 28 1 17 11 13 22 24 5 8 19 6 7 26 21 20 15 16 12 14 10 00068-011 0.1f 6.3v 0.1f 16v figure 11. adm213e typical operating circuit table 6. pin function descriptions mnemonic function v cc power supply input (5 v 10%). v+ internally generated positive supply (+9 v nominal). vC internally generated negative supply (?9 v nominal). gnd ground pin. must be connected to 0 v. c1+, c1C external capacitor 1 is connected between these pins. a 0.1 f capacitor is recommended, but larger capacitors (up to 47 f) can be used. c2+, c2C external capacitor 2 is connected between these pins. a 0.1 f capacitor is recommended, but larger capacitors (up to 47 f) can be used. t in transmitter (driver) inputs. these inputs accept ttl/cm os levels. an internal 400 k pull-up resistor to v cc is connected on each input. t out transmitter (driver) outputs. these are rs -232 signal levels (typically 9 v). r in receiver inputs. these inputs accept rs-232 signal levels. an internal 5 k pull-down resistor to gnd is connected on each input. r out receiver outputs. these are ttl/cmos output logic levels. en/ en receiver enable (active high on adm213e, active low on adm 211e). this input is used to enable/disable the receiver outputs. with en = low for the adm211e (en = high for the adm213e), the receiver outputs are enabled. with en = high for the adm211e (en = low for the adm213e), the receiver outputs are placed in a high impedance state. (see table 3 and table 4 .) shdn /shdn shutdown control (active low on adm213e, active high on adm211e). when the adm211e is in shutdown, the charge pump is disabled, the transmit ter outputs are turned off, and all receiver outputs are placed in a high impedance state. when the adm213e is in shutdown, the char ge pump is disabled, the transmitter outp uts are turned off, and receiver r1 to receiver r3 are placed in a high impedance state; receiver r4 and receiver r5 on the adm213e continue to operate normally during shutdown. (see table 3 and table 4 .) power consumption for all parts reduces to 5 w in shutdown.
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 8 of 20 typical performance characteristics log frequency (mhz) 80 70 0 0.33 30 0.6 60 50 10 40 30 20 6 3 11 8 limi t (dbv) 00068-012 figure 12. emc conducted emissions load capacitance (pf) 9 7 5 3 1 3000 ?7 ?5 ?3 ?1 0 500 1000 1500 2000 2500 tx o/p (v) 00068-013 tx o/p lo tx o/p hi figure 13. transmitter output voltage high/low vs. load capacitance (230 kbps) tx o/p hi tx o/p lo load current (ma) 15 2468 10 5 ?5 ?10 ?15 0 tx o/p (v) 1 0 0 00068-014 figure 14. transmitter output voltage vs. load current start 30.0mhz stop 200.0mhz limi t (dbv) 80 70 60 50 40 30 20 10 0 00068-015 figure 15. emc radiated emissions tx o/p hi loaded v cc (v) 9 7 6.0 5 3 ?1 ?5 ?7 ?3 ?9 4.0 4.5 5.0 5.5 tx o/p (v) 1 00068-016 tx o/p lo loaded figure 16. transmitter output voltage vs. power supply voltage shdn v+ v? 1 ch3 ch2 ch1 ch1 5.00v 5.00v m 50.0s 3.1v 5.00v v+, v? exiting shdn t t t 2 3 00068-017 figure 17. charge pump v+, v? exiting shutdown
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 9 of 20 v cc (v) 350 300 5.5 5.3 5.1 4.9 4.7 250 200 100 50 0 4.5 impedance ( ? ) 150 v+ v? 00068-018 figure 18. charge pump impedance vs. power supply voltage load current (ma) 15 51 01 5 10 5 ?5 ?10 ?15 0 v+/v? (v) 2 0 0 v+ v? 00068-019 figure 19. charge pump v+, v? vs. load current
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 10 of 20 theory of operation the adm206e/adm207e/adm208e/adm211e/adm213e are ruggedized rs-232 line drivers/receivers that operate from a single 5 v supply. step-up voltage converters coupled with level shifting transmitters and receivers allow rs-232 levels to be developed while operating from a single 5 v supply. features include low power consumption, high transmission rates, and compliance with the eu directive on emc, which includes protection against radiated and conducted interfere- ence, including high levels of electrostatic discharge. all rs-232 inputs and outputs contain protection against electrostatic discharges up to 15 kv and electrical fast tran- sients up to 2 kv. this ensures compliance to iec 1000-4-2 and iec 1000-4-4 requirements. the devices are ideally suited for operation in electrically harsh environments or where rs-232 cables are plugged/unplugged frequently. they are also immune to high rf field strengths without special shielding precautions. emissions are also controlled to within very strict limits. ttl/cmos technology is used to keep the power dissipation to an absolute minimum, allowing maximum battery life in portable applications. the adm2xxe is a modification, enhancement, and improvement to the adm2xx family and its derivatives. it is essentially plug-in compatible and does not have materially different applications. circuit description the internal circuitry consists of four main sections: ? a charge pump voltage converter. ? 5 v logic to eia-232 transmitters. ? eia-232 to 5 v logic receivers. ? transient protection circuit on all i/o lines. charge pump dc-to-dc voltage converter the charge pump voltage converter consists of a 200 khz 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 figure 20 and figure 21 . 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 inverted to generate ?10 v using c2 as the storage element. capacitor c3 and capacitor c4 are used to reduce the output ripple. if desired, larger capacitors (up to 47 f) can be used for capacitor c1 to capacitor c4. this facilitates direct substitution with older generation charge pump rs-232 transceivers. the v+ and vC supplies can also be used to power external circuitry, if the current requirements are small (see the typical performance characteristics section). + + v cc gnd s1 s2 c1 s3 s4 c3 v+ = 2v cc v cc internal oscillator 00068-020 figure 20. charge pump voltage doubler from voltage doubler + + v+ gnd s1 s2 c2 s3 s4 c4 gnd v? = ?(v+) internal oscillator 00068-021 figure 21. charge pump voltage inverter transmitter (driver) section the drivers convert 5 v logic input levels into eia-232 output levels. with v cc = 5 v and driving an eia-232 load, the output voltage swing is typically 9 v. unused inputs can be left unconnected, as an internal 400 k pull-up resistor pulls them high, forcing the outputs into a low state. the input pull-up resistors typically source 8 a when grounded, so unused inputs should either be connected to v cc or left unconnected in order to minimize power consumption. receiver section the receivers are inverting level shifters that accept eia-232 input levels and translate them into 5 v logic output levels. the inputs have internal 5 k pull-down resistors to ground and are protected against overvoltages of up to 25 v. the guaranteed switching thresholds are 0.4 v minimum and 2.4 v maximum. unconnected inputs are pulled to 0 v by the internal 5 k pull- down resistor. this, therefore, 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 0.65 v. this ensures error-free reception for both noisy inputs and for inputs with slow transition times. enable and shutdown table 3 and table 4 are truth tables for the enable and shutdown control signals. the enable function is intended to facilitate data bus connections where it is desirable to tristate the receiver outputs. in the disabled mode, all receiver outputs are placed in a high impedance state. the shutdown function is intended to shut down the device, thereby minimizing the quiescent current. in shutdown, all transmitters are disabled and all receivers on the adm211e are tristated.
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 11 of 20 on the adm213e, receiver r4 and receiver r5 remain enabled in shutdown. note that the transmitters are disabled but are not tristated in shutdown; it is not permitted to connect multiple (rs-232) driver outputs together. the shutdown feature is very useful in battery-operated systems since it reduces the power consumption to 1 w. during shutdown, the charge pump is also disabled. the shutdown control input is active high on the adm211e, and it is active low on the adm213e. when exiting shutdown, the charge pump is restarted, and it takes approximately 100 s for it to reach its steady state operating condition. high baud rate the adm2xxe feature high slew rates, permitting data transmission rates well in excess of the eia-232-e specifications. rs-232 levels are maintained at data rates up to 230 kbps, even under worst-case loading conditions. this allows for high speed data links between two terminals, making it suitable for the new generation modem standards that require data rates of 200 kbps. the slew rate is controlled internally to less than 30 v/s to minimize emi interference. t dr 3 v 0v en input receiver output notes 1. en is the complement of en for the adm213e. 00068-022 voh vol voh ?0.1v vol +0.1v figure 22. receiver disable timing t er 3 v 0v en input receiver output +3.5v +0.8v notes 1. en is the complement of en for the adm213e. 00068-023 figure 23. receiver enable timing esd/eft transient protection scheme the adm2xxe use protective clamping structures on all inputs and outputs that clamp the voltage to a safe level and dissipate the energy present in esd (electrostatic) and eft (electrical fast transient) discharges. a simplified schematic of the protection structure is shown in figure 24 and figure 25 . each input and output contains two back-to-back high speed clamping diodes. during normal operation, with maximum rs-232 signal levels, the diodes have no effect because one or the other is reverse biased, depending on the polarity of the signal. if, however, the voltage exceeds about 50 v, reverse breakdown occurs, and the voltage is clamped at this level. the diodes are large p-n junctions designed to handle the instantaneous current surges that can exceed several amperes. the transmitter outputs and receiver inputs have a similar protection structure. the receiver inputs can also dissipate some of the energy through the internal 5 k resistor to gnd as well as through the protection diodes. the protection structure achieves esd protection up to 15 kv and eft protection up to 2 kv on all rs-232 i/o lines. the methods used to test the protection scheme are discussed in the esd testing (iec 1000-4-2) and eft/burst testing (iec 1000-4-4) sections. r in rx d1 d2 r1 receiver input 00068-024 figure 24. receiver input protection scheme t out rx d1 d2 transmitter output 00068-025 figure 25. transmitter output protection scheme esd testing (iec 1000-4-2) iec 1000-4-2 (previously iec 801-2) specifies compliance testing using two coupling methods, contact discharge and air- gap discharge. contact discharge calls for a direct connection to the unit being tested. air-gap discharge uses a higher test voltage but does not make direct contact with the unit under test. with air-gap discharge, the discharge gun is moved toward the unit under test, developing an arc across the air gap. this method is influenced by humidity, temperature, barometric pressure, distance, and rate of closure of the discharge gun. the contact discharge method, while less realistic, is more repeatable and is gaining acceptance in preference to the air-gap method. although very little energy is contained within an esd pulse, the extremely fast rise time, coupled with high voltages, can cause failures in unprotected semiconductors. catastrophic
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 12 of 20 destruction can occur immediately because of arcing or heating. even if catastrophic failure does not occur immediately, the device can suffer from parametric degradation that can result in degraded performance. the cumulative effects of continuous exposure can eventually lead to complete failure. i/o lines are particularly vulnerable to esd damage. simply touching or plugging in an i/o cable can result in a static discharge that can damage or destroy the interface product connected to the i/o port. traditional esd test methods, such as the mil-std-883b method 3015.7, do not fully test product susceptibility to this type of discharge. this test was intended to test product susceptibility to esd damage during handling. each pin is tested with respect to all other pins. there are some important differences between the traditional test and the iec test: ? the iec test is much more stringent in terms of discharge energy. the peak current injected is over four times greater. ? the current rise time is significantly faster in the iec test. ? the iec test is carried out while power is applied to the device. it is possible that the esd discharge could induce latch-up in the device being tested. this test, therefore, is more represent- tative of a real-world i/o discharge, where the equipment is operating normally with power applied. however, both tests should be performed to ensure maximum protection both during handling and later during field service. r1 r2 c1 esd test method r2 c1 h. body mil-std-883b 1.5k ? 100pf iec 1000-4-2 330 ? 150pf high voltage generator device under test 00068-026 figure 26. esd test standards 100 i peak (%) 90 36.8 10 t dl t rl time t 00068-027 figure 27. human body model esd current waveform 100 i peak (%) 90 10 0 .1ns to 1ns 60ns 30ns time t 00068-028 figure 28. iec 1000-4-2 esd current waveform adm2xxe products are tested using both of the previously mentioned test methods. pins are tested with respect to all other pins as per the mil-std-883b specification. in addition, all i/o pins are tested per the iec test specification. the products are tested under the following conditions: ? power on (normal operation). ? power on (shutdown mode). ? power off. there are four levels of compliance defined by iec 1000-4-2. adm2xxe products meet the most stringent compliance level both for contact and for air-gap discharge. this means that the products are able to withstand contact discharges in excess of 8 kv and air-gap discharges in excess of 15 kv. table 7. iec 1000-4-2 compliance levels level contact discharge (kv) air-gap discharge (kv) 1 2 2 2 4 4 3 6 8 4 8 15 table 8. adm2xxe esd test results esd test method i/o pin (kv) mil-std-883b 15 iec 1000-4-2 contact 8 air-gap 15 eft/burst testing (iec 1000-4-4) iec 1000-4-4 (previously iec 801-4) covers eft/burst immunity. electrical fast transients occur because of arcing contacts in switches and relays. the tests simulate the interference generated when, for example, a power relay disconnects an inductive load. a spark is generated due to the well-known back emf effect. in fact, the spark consists of a
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 13 of 20 burst of sparks as the relay contacts separate. the voltage appearing on the line, therefore, consists of a burst of extremely fast transient impulses. a similar effect occurs when switching on fluorescent lights. the fast transient burst test defined in iec 1000-4-4 simulates this arcing; its waveform is illustrated in figure 29 . it consists of a burst of 2.5 khz to 5 khz transients repeating at 300 ms intervals. it is specified for both power and data lines. 300ms 15ms t v 5ns 0.2ms/0.4ms 50ns v t 0 0068-029 figure 29. iec 1000-4-4 fast transient waveform table 9. level v peak (kv) psu v peak (kv) i/o 1 0.5 0.25 2 1 0.5 3 2 1 4 4 2 a simplified circuit diagram of the actual eft generator is illustrated in figure 30 . the transients are coupled onto the signal lines using an eft coupling clamp. the clamp is 1 m long and surrounds the cable completely, providing maximum coupling capacitance (50 pf to 200 pf typical) between the clamp and the cable. high energy transients are capacitively coupled onto the signal lines. fast rise times (5 ns), as specified by the standard, result in very effective coupling. because high voltages are coupled onto the signal lines, this test is very severe. the repetitive transients can often cause problems where single pulses do not. destructive latch-up can be induced due to the high energy content of the transients. note that this stress is applied while the interface products are powered up and are transmitting data. the eft test applies hundreds of pulses with higher energy than esd. worst-case transient current on an i/o line can be as high as 40 a. test results are classified according to the following: ? classification 1: normal performance within speci- fication limits. ? classification 2: temporary degradation or loss of performance that is self recoverable. ? classification 3: temporary degradation or loss of function or performance that requires operator intervention or system reset. ? classification 4: degradation or loss of function that is not recoverable due to damage. adm2xxe products meet classification 2 and have been tested under worst-case conditions using unshielded cables. data transmission during the transient condition is corrupted, but it can resume immediately following the eft event without user intervention. r c r m c c l z s c d 50 ? output high voltage source 00068-030 figure 30. iec 1000-4-4 fast transient generator iec 1000-4-3 radiated immunity iec 1000-4-3 (previously iec 801-3) describes the measure- ment method and defines the levels of immunity to radiated electromagnetic fields. it was originally intended to simulate the electromagnetic fields generated by portable radio transceivers or any other devices that generate continuous wave-radiated em energy. its scope has since been broadened to include spurious em energy that can be radiated from fluorescent lights, thyristor drives, inductive loads, and other sources. testing for immunity involves irradiating the device with an em field. there are various methods of achieving this, including use of anechoic chamber, stripline cell, tem cell, and gtem cell. a stripline cell consists of two parallel plates with an electric field developed between them. the device under test is placed within the cell and exposed to the electric field. there are three severity levels having field strengths ranging from 1 v/m to 10 v/m. results are classified in a similar fashion to those for iec 1000-4-4. ? classification 1: normal operation. ? classification 2: temporary degradation or loss of function that is self recoverable when the interfering signal is removed. ? classification 3: temporary degradation or loss of function that requires operator intervention or system reset when the interfering signal is removed. ? classification 4: degradation or loss of function that is not recoverable due to damage. the adm2xxe family of products easily meets classification 1 at the most stringent requirement (level 3). in fact, field strengths up to 30 v/m showed no performance degradation, and error- free data transmission continued even during irradiation.
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 14 of 20 table 10. test severity levels (iec 1000-4-3) level field strength (v/m) 1 1 2 3 3 10 emissions/interference en 55022, cispr 22 defines the permitted limits of radiated and conducted interference from information technology (it) equipment. the objective of the standard is to minimize the level of emissions, both conducted and radiated. for ease of measurement and analysis, conducted emissions are assumed to predominate below 30 mhz, and radiated emissions are assumed to predominate above 30 mhz. conducted emissions this is a measure of noise that is conducted onto the line power supply. switching transients from the charge pump that are 20 v in magnitude and that contain significant energy can lead to conducted emissions. another source of conducted emissions is the overlap in switch-on times in the charge pump voltage converter. in the voltage doubler shown in figure 31 , if s2 has not fully turned off before s4 turns on, a transient current glitch occurs between v cc and gnd that results in conducted emis- sions. therefore, it is important that the switches in the charge pump guarantee break-before-make switching under all condi- tions so instantaneous short-circuit conditions do not occur. the adm2xxe have been designed to minimize the switching transients and ensure break-before-make switching, thereby minimizing conducted emissions. this results in emission levels well below specified limits. other than the recom- mended 0.1 f capacitor, no additional filtering/decoupling is required. conducted emissions are measured by monitoring the line power supply. the equipment used consists of a line impedance stabilizing network (lisn) that essentially presents a fixed impedance at rf and a spectrum analyzer. the spectrum analyzer scans for emissions up to 30 mhz. a plot for the adm211e is shown in figure 33 . + + v cc gnd s1 s2 c1 s3 s4 c3 v+ = 2v cc v cc internal oscillator 00068-031 figure 31. charge pump voltage doubler ?1 ?2 switching glitches 00068-032 figure 32. switching glitches log frequency (mhz) 80 70 0 0.33 30 0.6 60 50 10 40 30 20 6 3 11 8 limi t (dbv) 00068-033 figure 33. conducted emissions plot radiated emissions radiated emissions are measured at frequencies in excess of 30 mhz. rs-232 outputs designed for operation at high baud rates while driving cables can radiate high frequency em energy. the previously described causes of conducted emissions can also cause radiated emissions. fast rs-232 output tran- sitions can radiate interference, especially when lightly loaded and driving unshielded cables. charge pump devices are also prone to radiating noise due to the high frequency oscillator and the high voltages being switched by the charge pump. the move toward smaller capacitors in order to conserve board space has resulted in higher frequency oscillators being em- ployed in the charge pump design, resulting in higher levels of conducted and radiated emissions. the rs-232 outputs on the adm2xxe products feature a con- trolled slew rate in order to minimize the level of radiated emissions, yet they are fast enough to support data rates of up to 230 kbps.
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 15 of 20 dut turntable radiated noise adjustable antenna to receiver 00068-034 figure 34. radiated emissions test setup figure 35 shows a plot of radiated emissions vs. frequency. the levels of emissions are well within specifications, without the need for any additional shielding or filtering components. the adm2xxe were operated at maximum baud rates and configured like a typical rs-232 interface. testing for radiated emissions was carried out in a shielded anechoic chamber. start 30.0mhz stop 200.0mhz limi t (dbv) 80 70 60 50 40 30 20 10 0 00068-035 figure 35. radiated emissions
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 16 of 20 outline dimensions controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design. corner leads may be configured as whole or half leads. compliant to jedec standards ms-001-af 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) 24 1 12 13 0.100 (2.54) bsc 1.280 (32.51) 1.250 (31.75) 1.230 (31.24) pin 1 0.210 (5.33) max seating plane 0.015 (0.38) min 0.005 (0.13) min 0.280 (7.11) 0.250 (6.35) 0.240 (6.10) 0.060 (1.52) max 0.430 (10.92) max 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.015 (0.38) gauge plane 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) figure 36. 24-lead plastic dual in-line package [pdip] (n-24-1) dimensions shown in inches and (millimeters) compliant to jedec standards ms-013-ad controlling dimensions are in millimeters; inch dimensions (in parentheses) are ro unded-off millimeter equivalents for reference only and are not appropriate for use in design. 15.60 (0.6142) 15.20 (0.5984) 0.30 (0.0118) 0.10 (0.0039) 2.65 (0.1043) 2.35 (0.0925) 10.65 (0.4193) 10.00 (0.3937) 7.60 (0.2992) 7.40 (0.2913) 0 . 7 5 ( 0 . 0 2 9 5 ) 0 . 2 5 ( 0 . 0 0 9 8 ) 45 1.27 (0.0500) 0.40 (0.0157) coplanarity 0.10 0.33 (0.0130) 0.20 (0.0079) 0.51 (0.0201) 0.31 (0.0122) seating plane 8 0 24 13 12 1 1.27 (0.0500) bsc 060706-a figure 37. 24-lead standard small outline package [soic_w] wide body (rw-24) dimensions shown in millimeters and (inches)
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 17 of 20 controlling dimensions are in millimeters; inch dimensions (in parentheses) are rounded-off millimeter equivalents for reference only and are not appropriate for use in design. compliant to jedec standards ms-013-ae 18.10 (0.7126) 17.70 (0.6969) 0.30 (0.0118) 0.10 (0.0039) 2.65 (0.1043) 2.35 (0.0925) 10.65 (0.4193) 10.00 (0.3937) 7.60 (0.2992) 7.40 (0.2913) 0 . 7 5 ( 0 . 0 2 9 5 ) 0 . 2 5 ( 0 . 0 0 9 8 ) 45 1.27 (0.0500) 0.40 (0.0157) coplanarity 0.10 0.33 (0.0130) 0.20 (0.0079) 0.51 (0.0201) 0.31 (0.0122) seating plane 8 0 28 15 14 1 1.27 (0.0500) bsc 060706-a figure 38. 28-lead standard small outline package [soic_w] wide body (rw-28) dimensions shown in millimeters and (inches) compliant to jedec standards mo-150-ag 060106-a 24 13 12 1 8.50 8.20 7.90 8.20 7.80 7.40 5.60 5.30 5.00 seating plane 0.05 min 0.65 bsc 2.00 max 0.38 0.22 coplanarity 0.10 1.85 1.75 1.65 0.25 0.09 0.95 0.75 0.55 8 4 0 figure 39. 24-lead shrink small outline package [ssop] (rs-24) dimensions shown in millimeters
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 18 of 20 compliant to jedec standards mo-150-ah 060106-a 28 15 14 1 10.50 10.20 9.90 8.20 7.80 7.40 5.60 5.30 5.00 seating plane 0.05 min 0.65 bsc 2.00 max 0.38 0.22 coplanarity 0.10 1.85 1.75 1.65 0.25 0.09 0.95 0.75 0.55 8 4 0 figure 40. 28-lead shrink small outline package [ssop] (rs-28) dimensions shown in millimeters 24 13 12 1 6.40 bsc 4.50 4.40 4.30 pin 1 7.90 7.80 7.70 0.15 0.05 0.30 0.19 0.65 bsc 1.20 max 0.20 0.09 0.75 0.60 0.45 8 0 seating plane 0.10 coplanarity compliant to jedec standards mo-153-ad figure 41. 24-lead thin shrink small outline package [tssop] (ru-24) dimensions shown in millimeters compliant to jedec standards mo-153-ae 28 15 14 1 8 0 seating plane c oplanarit y 0.10 1.20 max 6.40 bsc 0.65 bsc pin 1 0.30 0.19 0.20 0.09 4.50 4.40 4.30 0.75 0.60 0.45 9.80 9.70 9.60 0.15 0.05 figure 42. 28-lead thin shrink small outline package [tssop] (ru-28) dimensions shown in millimeters
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 19 of 20 ordering guide model temperature range package description package option adm206ear ?40c to +85c 24-lead soic_w rw-24 adm206ear-reel ?40c to +85c 24-lead soic_w rw-24 adm206earz 1 ?40c to +85c 24-lead soic_w rw-24 adm206earz-reel 1 ?40c to +85c 24-lead soic_w rw-24 adm207ean ?40c to +85c 24-lead pdip n-24-1 adm207eanz 1 ?40c to +85c 24-lead pdip n-24-1 adm207ear ?40c to +85c 24-lead soic_w rw-24 adm207ear-reel ?40c to +85c 24-lead soic_w rw-24 adm207earz 1 ?40c to +85c 24-lead soic_w rw-24 adm207earz-reel 1 ?40c to +85c 24-lead soic_w rw-24 adm207ears ?40c to +85c 24-lead ssop rs-24 adm207ears-reel ?40c to +85c 24-lead ssop rs-24 adm207earu ?40c to +85c 24-lead tssop ru-24 adm207earu-reel ?40c to +85c 24-lead tssop ru-24 adm207earu-reel7 ?40c to +85c 24-lead tssop ru-24 adm207earuz 1 ?40c to +85c 24-lead tssop ru-24 adm207earuz-reel7 1 ?40c to +85c 24-lead tssop ru-24 adm208ean ?40c to +85c 24-lead pdip n-24-1 adm208eanz 1 ?40c to +85c 24-lead pdip n-24-1 adm208ear ?40c to +85c 24-lead soic_w rw-24 adm208ear-reel ?40c to +85c 24-lead soic_w rw-24 adm208earz 1 ?40c to +85c 24-lead soic_w rw-24 adm208earz-reel 1 ?40c to +85c 24-lead soic_w rw-24 adm208ears ?40c to +85c 24-lead ssop rs-24 adm208ears-reel ?40c to +85c 24-lead ssop rs-24 adm208earsz 1 ?40c to +85c 24-lead ssop rs-24 adm208earsz-reel 1 ?40c to +85c 24-lead ssop rs-24 adm208earu ?40c to +85c 24-lead tssop ru-24 adm208earu-reel ?40c to +85c 24-lead tssop ru-24 adm208earu-reel7 ?40c to +85c 24-lead tssop ru-24 adm208earuz 1 ?40c to +85c 24-lead tssop ru-24 ADM208EARUZ-REEL 1 ?40c to +85c 24-lead tssop ru-24 adm211ear ?40c to +85c 28-lead soic_w rw-28 adm211ear-reel ?40c to +85c 28-lead soic_w rw-28 adm211earz 1 ?40c to +85c 28-lead soic_w rw-28 adm211earz-reel 1 ?40c to +85c 28-lead soic_w rw-28 adm211ears ?40c to +85c 28-lead ssop rs-28 adm211ears-reel ?40c to +85c 28-lead ssop rs-28 adm211earsz 1 ?40c to +85c 28-lead ssop rs-28 adm211earsz-reel 1 ?40c to +85c 28-lead ssop rs-28 adm211earu ?40c to +85c 28-lead tssop ru-28 adm211earu-reel ?40c to +85c 28-lead tssop ru-28 adm211earu-reel7 ?40c to +85c 28-lead tssop ru-28 adm211earuz 1 ?40c to +85c 28-lead tssop ru-28 adm211earuz-reel 1 ?40c to +85c 28-lead tssop ru-28 adm211earuz-reel7 1 ?40c to +85c 28-lead tssop ru-28
adm206e/adm207e/adm 208e/adm211e/adm213e rev. e | page 20 of 20 ?2006 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. c00068-0-9/06(e) model temperature range package description package option adm213ear ?40c to +85c 28-lead soic_w rw-28 adm213ear-reel ?40c to +85c 28-lead soic_w rw-28 adm213earz 1 ?40c to +85c 28-lead soic_w rw-28 adm213earz-reel 1 ?40c to +85c 28-lead soic_w rw-28 adm213ears ?40c to +85c 28-lead ssop rs-28 adm213ears-reel ?40c to +85c 28-lead ssop rs-28 adm213earsz 1 ?40c to +85c 28-lead ssop rs-28 adm213earsz-reel 1 ?40c to +85c 28-lead ssop rs-28 adm213earu ?40c to +85c 28-lead tssop ru-28 adm213earu-reel ?40c to +85c 28-lead tssop ru-28 adm213earu-reel7 ?40c to +85c 28-lead tssop ru-28 adm213earuz 1 ?40c to +85c 28-lead tssop ru-28 adm213earuz-reel 1 ?40c to +85c 28-lead tssop ru-28 adm213earuz-reel7 1 ?40c to +85c 28-lead tssop ru-28 1 z = pb-free part.

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