U2510B
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U2510B - U2510B
U2510B
All-Band AM/FM Receiver Audio Amplifier
U2510B integrated bipolar one-chip AM/FM radio circuit. contains front with preamplifier, demodulator, complete receiver, amplifier mode switch tape. This circuit designed clock radios portable radio-cassette recorders.
Features
Superior strong signal behavior using Soft mute decreasing interstation noise
mode
Excellent performance (level controlled, both
polarities available)
Level indicator (LED drive)
mode control: tape Wide supply-voltage range quiescent current High output power: Electronic volume control Electronic bandwidth control (treble high cut) Output stage headphone speaker drive
Block Diagram
tank ant. front front Voltage stab. AM/FM mode control control amp. detect. Level indic. preamp. Volume Mute amp. discr. Power amp. osc. tank (Replaceable)
ant. osc. tank
VRef
mode
Treble
13912
Tape
Figure Block diagram
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Order Information
Extended Type Number U2510B-M U2510B-M_T Package SDIP28 SDIP28
AF-GND
Remarks supply voltage
Function oscillator tank circuit input, recommended load impedance approximately FM-AFC diode connection, coupling capacitor (C19) determines characteristic (holding range slope) FMOsc oscillator tank circuit input, recommended load impedance approximately VRef Regulated voltage output (2.4 FMtank tank circuit connection, recommended load impedance approximately AMtank tank circuit connection, recommended load impedance approximately FM-AGC voltage output, time constant (C20). Loading this resistor GND) will increase threshold, grounding this will switch function FMin input (common-base preamplifier transistor), recommended (RF) source impedance approximately FE-GND front-end ground AM/FM AM/FM output IFout (collector output preamplifier) Mode ctrl Mode control input: switch Function open Ground Tape AM-IFin input, input impedance FM-IFin input, input impedance VTreble Treble control voltage input drive Level indicator output (open-collector output, drive) IF-GND ground switch function control input: Function open Ground fOSC fOSC VAGC/AFC AGC/AFC voltage, time constant adjust (C10), input impedance approximately AM/FM AM/FM detector output, load capacitor detect (C11) conjunction with detector output resistance (7.5 determines (FM) deemphasis well (modulation) frequency response detector AFin Audio amplifier input, input resistance approximately coupling capacitor (C9) determines frequency response Ripple Ripple filter connection. Load capacitance (C12) determines frequency response supply-voltage ripple rejection Supply voltage input AFout Audio amplifier output AF-GND Ground audio power stage Symbol AMOsc
Mute
FM-discr
AFout
Ripple
ctrl
AMOsc
AFin
FM-AFC FMOsc
AM/FM detect
VAGC/AFC
VRef FMtank
switch
IF-GND
AMtank
drive
FM-AGC FMin
VTreble FM-IFin
FE-GND AM/FM IFout
AM-IFin Mode ctrl switch
14812
Figure Pinning
Symbol Mute Function Mute voltage output, time constant (C23), mute depth threshold adjustable load resistance (R3) discriminator filter connection, ceramic resonator equivalent LC-circuit Audio negative feedback input. Blocking capacitor (C8) determines audio amplifiers low-end cut-off frequency Input volume control voltage
FM-discr
ctrl
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
Terminal Voltages
Test circuit: Voltage/V Mute voltage discriminator Negative feedback Volume control input oscillator oscillator VRef tank input input Front ground AM/FM output Mode control switch input input Treble control input ground switch off) (AM)/AFC (FM) Detector output input Ripple filter Supply voltage output ground Symbol TAPE TAPE
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Absolute Maximum Ratings
Parameters Supply voltage Power dissipation Ambient temperature range Symbol Ptot Tamb Value Unit
Electrical Characteristics
Tamb 25°C, test circuit (figure 16), unless otherwise specified Parameters Supply voltage range Oscillator stop voltage Operating temperature range Supply quiescent current Test Conditions Pins Symbol Min. Typ. Max. Unit
TAPE Tape) Regulated voltage VRef Audio amplifier (Pin 24), test point: (Pin measuring range: kHz, Tape, Input resistance Closed loop voltage gain GVaf1 (Vo/Vi3) GVaf1 Output voltage High-end cut-off frequency Supply-voltage rejection ratio SVRR (Vhum/Vo) Vhum fhum SVRR Noise voltage output power Distortion
1000
1000
section, dBmV, MHz, kHz, dev. 22.5 kHz, fiIF 10.7 MHz, measuring range: kHz, test point: (Pin front-end voltage gain GVFM (ViIF Vi2) dbmV GVFM Recovered audio voltage Detector output resistance Detector output distortion dev. dBmV dBmV
U2510B-M_T: max.
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
Electrical Characteristics (continued)
Tamb 25°C, test circuit (figure 16), unless otherwise specified Parameters rejection ratio sensitivity Limiting threshold Mute voltage Test Conditions Pins (S+N)/N (S+N)/N Test point: Mute dBmV Referred fOSC fin, dBmV dBmV dBmV Symbol AMRR Vmute Vmute Min. Typ. Max. Unit dBmV dBmV dBmV
Mute depth
holding range
current ILED Oscillator voltage eZload VOSC section dBmV, MHz, kHz, 30%, fiIF kHz, measuring range: kHz, test point: front voltage gain GVAM (ViIF/Vi1) GVAM dBmV, Recovered audio voltage Detector output resistance Detector output distortion dBmV dBmV sensitivity (S+N)/N= (S+N)/N= (S+N)/N= figure merit referred dBmV, voltage drop input resistance current ILED Oscillator voltage VOSC
dBmV dBmV dBmV
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Tamb=25°C 1000 Tape
9510396
10000
RL=4W f=1kHz d=10% Tamb=25°C
9510399
Figure Quiescent current
without treble control
Figure section: Max. output power
with treble control 0.01
10397
f=200Hz
f=100Hz Vhum=200mV VS=6V RL=8W Tamb=25°C
Vi=5mV VS=6V RL=8W Tamb=25°C
10400
Figure section
f=1kHz Tamb=25°C
Figure section: Supply-voltage rejection ratio
VS=6V Tamb=25°C 100kW
10403
d(%)
VS=3V RL=32W VS=6V RL=8W VS=9V RL=8W
10398
68kW
1000
10000
dBmV
Figure section: Distortion
Figure section: Mute voltage
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
S+N(m=80%) S+N(m=30%) VS=6V fi1=1.6MHz fAF=1kHz Tamb=25°C d(m=80%) -100
10404
ILED
d(m=30%)
10407
VS=6V Tamb=25°C
dBmV
dBmV
Figure section: Demodulator output level
VS=6V Vi3=10mV fAF=1MHz fAF=10kHz Tamb=25°C Treble Voltage
Figure AM/FM level indicator current
VAGC
VS=6V fi1=1.6MHz Tamb=25°C
Treble Voltage
10406
10408
dBmV
Figure Volume control range characteristics
Figure section: voltage
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
S+N(Df=
"75kHz) "22.5kHz)
Tamb 25°C
S+N(Df=
AM(m=30%)
-100 d(Df= d(Df=
"75kHz) "22.5kHz)
10401
dBmV
Figure section: Demodulator output level
68kW 100kW R3=0 dBmV 22.5 Tamb 25°C
-100 dBmV
10402
Figure section: Audio output level
-100 dBmV Tamb 25°C
10405
dBmV
Figure section: Audio output level
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
Test Circuit
Vmute
U2510B
10.7
13913
ViIF
Tape
ILED
Figure Test circuit
Application
General
U2510B bipolar monolithic radio sets, example, headphone receivers, radio recorders clock radios. contains switching function blocks necessary construct these kinds radio receivers using only components around design, special efforts were made good performance bands (short long wave). implementation enhanced functions (options) makes possible improve radio's performance produce radios with interesting features. this case (external) parts have changed added. using some options offered U2510B different types classes radios designed customer's requirements with same general advantages using U2510B fact that receiver functions (including options) integrated tested system level. Therefore, additional cost-savings achieved Shorter development time through less technical problems Higher reproductivity reject level production line. Another advantage, technology U2510B, wide operating voltage range, especially upper limit This feature allows soft power supply line powered radios which also reduce set's total cost.
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Circuit Example
Figure shows circuit diagram AM/AF radios using U2510B. Figure shows circuit diagram AM/AF radio higher class designs using possible options U2510B. layout board, shown figure suitable both circuit example shown figure circuit example shown figure associated coil, varicon filter specifications listed table: COIL DATA SPECIAL COMPONENT PARTS. circuit diagram (figure 18), following options compared circuit diagram (figure (the additional parts, which have provided, listed parentheses): Soft mute high control mode cap.) Electronic treble control TAPE mode pot.) On-chip mode control TAPE application mode capacitor) AFC, adjustable correct polarity slope cap.) Tuning indication using indicator LED, cap.) Option reduces interstation noise functions: soft mute HCC. Both controlled mute voltage (Pin soft mute reduces loudness only, while reduces high-end audio cut-off frequency audio preamplifier, when signal level falls below given threshold. This signal level threshold well mute depth reduced adding resistor (R3) increasing front-end gain. Option allows treble control operating modes without need additional capacitor. This concept leads smooth correct treble control behavior which improvement compared controlled network normally used. Option very useful application radio cassette-recorders, instance. TAPE mode, AM/FM receiver blocks completely switched signal from tape recorder audio amplifier's input directly. This saves quiescent current makes TAPE switching easy. However, minimize switching noise mode switch, following switch sequence should chosen: TAPE. Option improves strong signal behavior protecting mixer against overload. This provided integrated broad-band-width AGC. necessary, threshold decreased resistor, loading (not shown). Option improves tuning behavior substantially. special design on-chip function means that common disadvantages such asymmetrical slope, (chip-) temperature effects unlimited holding range avoided. mentioned "Pinning Description Table", slope inverted when local oscillator (LO) frequency below receiving frequency. This achieved connecting potential addition options described above, following proposals implemented circuit diagram (figure 18), too:
applied. This improves channel
selectivity minimizes substantially spurious responses caused ceramic filter (CF2). With choice winding ratio this IFT, front gain matched other values necessary.
input section, cost antenna filter
(L5, C15) replaced special band pass filter (PFWE8). Such protects front against out-off-band interference signals channels, etc.) which could disturb reception.
Design Hints
value power supply blocking capacitor should below addition, this capacitor should placed near This will help avoid unacceptable noise generated noise-radiation from audio amplifier bar-antenna. designs, where supply voltage goes below value blocking capacitor (C7) should chosen even higher. achieve high rejection short wave reception medium wave operation, amplitude should exceed approximately This amplitude depends transformer's turns ratio. transformer type described "Coil Data Table", resistor (2.2 example) parallel secondary side transformer recommended. minimize feedback effects RF/IF part mode, capacitor should placed near Pins possible. shown application circuit diagrams (figures 18), mode ceramic filter devices used channel selection (CF2) while demodulation LC-discriminator circuit (T4, C24, C25) used instead ceramic discriminator device. Such discriminator circuit easily matched selectivity block alignment. zerocrossing discriminator detected demodulator output (Pin 23). zero-crossing voltage equal half regulated voltage
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
alignment LC-discriminator circuit should done with little effect function. This realized switching open-circuit connecting voltage source using signal level alignment. general, ceramic discriminator devices used, too. this case, effect unavoidable spreads frequency characteristics these case ceramic devices conjunction with characteristic considered. example, mismatches characteristics between selectivity block discriminator will lead increased signal-to-noise ratio signal level well higher demodulation distortion level asymmetrical AFC.
Application Circuits
Antenna Volume
U2510B
10.7
13915
Figure Application circuit (low cost)
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Antenna Volume Treble
(R3) Mute Adj.
U2510B
10.7 Tape Tape
13914
Figure Application circuit (upgraded) only
Figure PC-board
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
Coil Data Special Component Part
Part Stage between between Wire diameter/mm Terminal Number turns 0.07 0.06 0.09 0.09 Type Manufacturer 0.07 7MC-7789N Toko 21K7-H5 Mitsumi 7TRS-8441 Toko L-5K7-H5 Mitsumi mat.: A119 Toko mat.: A119 Toko
0.07 0.06 0.09 0.09 0.62 3.75 0.62 3.75 0.62 4.75
(optional) discriminator coil diam. coil diam. antenna coil diam.
BPF1
antenna (optional)
(optional) Variable capacitor
total turns tap: PFWE8 MHz) Soshin Electric SFU-455B Murata BFCFL-455 Toko SFE10.7MA5 Murata CFSK 107M1 Toko CDA10.7MC1 Murata HD22124 AM/FM Toko
13931
Coil, bottom view
coil
Figure
antenna
TEMIC Semiconductor Rev. 06-Apr-98
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U2510B
Package Information
Package SDIP28
Dimensions
27.5 27.1 10.26 10.06 0.53 0.43 23.114 1.778 0.35 0.25 12.2 11.0
technical drawings according specifications 13044
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TEMIC Semiconductor Rev. 06-Apr-98
U2510B
Ozone Depleting Substances Policy Statement
policy TEMIC Semiconductor GmbH Meet present future national international statutory requirements. Regularly continuously improve performance products, processes, distribution operating systems with respect their impact health safety employees public, well their impact environment. particular concern control eliminate releases those substances into atmosphere which known ozone depleting substances ODSs). Montreal Protocol 1987) London Amendments 1990) intend severely restrict ODSs forbid their within next years. Various national international initiatives pressing earlier these substances. TEMIC Semiconductor GmbH semiconductor division been able policy continuous improvements eliminate ODSs listed following documents. Annex list transitional substances Montreal Protocol London Amendments respectively Class ozone depleting substances Clean Amendments 1990 Environmental Protection Agency EPA) Council Decision 88/540/EEC 91/690/EEC Annex transitional substances respectively. TEMIC Semiconductor GmbH certify that semiconductors manufactured with ozone depleting substances contain such substances.
reserve right make changes improve technical design without further notice. Parameters vary different applications. operating parameters must validated each customer application customer. Should buyer TEMIC products unintended unauthorized application, buyer shall indemnify TEMIC against claims, costs, damages, expenses, arising directly indirectly, claim personal damage, injury death associated with such unintended unauthorized use. TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 7131 2831, number: 7131 2423
TEMIC Semiconductor Rev. 06-Apr-98
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