MC2831A MOTOROLA | Alldatasheet
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m= SEMICONDUCTOR MC2831A TECHNICAL DATA LOW POWER FM TRANSMITTER SYSTEM. ‘The MC2831A is a one-chip FM transmitter subsystem designed for cordless telephone and FM communication equipment. It includes a Microphone Amplifier, Pilot Tone Oscillator, Voltage Controlled Oscillator and Battery Monitor. LOW POWER © Wide Range of Operating Supply Voltage (3.0 V-8.0 V) FM TRANSMITTER SYSTEM © Low Drain Current (4.0 mA Typ Full Operation at Voc = 4.0 V) SILICON MONOLITHIC © Battery Checker (290 A Typ at Voc = 4.0 V) INTEGRATED CIRCUIT ‘© Low Number of External Parts Required © Users Must Comply with Local Regulations on R.F. Transmission (FCC, DOT, PT.T., etc) FUNCTIONAL BLOCK DIAGRAM 6 j P surFX PLASTIC PACKAGE CASE 608 be 16 a ob [vorabie . wi D SUFFIX PLASTIC PACKAGE CASE 7510
39 Buffer O14 (SO-16)
ad _. — tr TW a Vargble wie Reoctanee Ff ig Amp Output atid
59 VREF 912 Decoupling [2 15) Ove
7 Eve Moduiator nF
FE a Battery input & 8 Output
64 Shocker ) Vee [8 [Gna
°C Tone ay Input B fa\\Vec Mic Amp Battery 7¢ O10 Output 2 i ‘Checker [ rer Due cc, —-, Tone Osc
2 Jone bo output © se
_ ORDERING INFORMATION ‘Temperature Device Tange | Package cw swe MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA. 8-46
MAXIMUM RATINGS (Ta = 25°C. uniess otherwise noted) [Reting | Svmbot [Value] Unit_| [Power Suppyvouwge dt vec | vac‘ [Operating Supply Voltage Range | vec_| 30t080 | vee | [Battery Checker Output Sink Current | neo [25 | mA ELECTRICAL CHARACTERISTICS (Vcc1 = 4.0 Vdc. Vec2 = 4.0 Vdc. Ta = 25°C, unless otherwise noted) Characteristic [ Srmbot [rin [min [tye | Max [unit | [Braincunet | ces |e |e | ao | ato a [orineures | Cece | fee Tae [os | ma | BATTERY CHECKER [Treshold Vetoge we of On| Me | mT to [1a [ta | vee] [tein nO ¥, Pin t0 Sink Curent = 5:0 mad Mc AMPUFER [Output Swing Win = 20mVima fin = VOwNe | Yop | 6 | [a] 16 | vee | (Vo = 31 mVems: fin = 1.0 kHz) PILOT TONE OSCILLATOR (250 LOADING) El [ouput vores —soma | Maro [8 [Tf | vem | [ouperoevowse | oe | | Le || ve | Total Harmonic Distortion mo [|e] = | te | se) Tone Switch Threshold} WW acts _ [vee FM MODULATOR (120 2 LOADING) Oviput AF Voltage fo = 166M) —=S=S”~*~*~ésdrC(RM || CT ‘| Ve | Ouput DC Voltage ee pe ee Win 10V2 02V) ‘Maxim Deviation (Note 1 ioe ee ee ce we | (Vin = OV to +2.0V) | IF Frequency Range a a MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA 8-47
ncuRe 1 — Test cic Se 0.0047 56 pF pws ] “TT Mcz831A, = i Tie s2k 0.047 1 Toko America tt * oa one Eee FRQURE 2— SINGLE CHP FM VHF TRANSMITTER AT 4:7 te ain i {] Variable | Sor vou gE [ne = see "100 0F 5.0 pF pay [eae] wor] mpogpe a] bat Zope “soaem 22.0008 = 0.33 aH 0.47 gH (ve ome (| od EY $a i creak 3] | Te xh VV ype * 16m et ate heb hn o tok 0.47 ores MOTOROLA LINEAR/INTERFACE Cs DEVICE DATA 8-48