Linear versus Current) Noise Design Protected Benefits

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Linear versus Current) Noise Design Protected Benefits

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On-chip Control Functions Available System Gain Adjust
Linear versus Current)
Noise Design Protected
Benefits
Front-end Functions High-performance Receiver Except
Preamplifier Integrated
Receiver U4065B
Improved Dynamic Range High Current Double-balanced Mixer Design
Conception with Loops On-chip
Improved Blocking Intermod Behavior Unique "Interference" Sensor
Controlling
Easy Cascading Filters (Ceramic) Enabled On-chip Preamplifiers
Description
U4065B bipolar integrated front-end circuit. contains mixer, oscillator, preamplifiers unique interference sensor. device designed high-performance radio home receiver applications.
Rev. 4807A-AUDR-05/04
Figure Block Diagram
tank gain adjust output tank Mixer
tank
Interference mixer
wide band
adjust (wide band)
tank
Local oscillator
detector
VREF Voltage regulator
Interference
output VTUNE
level
U4065B
4807A-AUDR-05/04
U4065B
Configuration
Figure Pinning SO24
GND5 IF1IN GND4 MIXOUT2 MIXOUT1 VREF MIXIN2 MIXIN1
LOBUFF GND1 IF2OUT GAINIF1 IF2IN IF1OUT GND2 IMIFIN AGCOUT IMMIXOUT
GND3 AGCWB
4807A-AUDR-05/04
Description
Symbol LOBUFF GND1 IF2OUT GAINIF1 IF2IN IF1OUT GND2 IMIFIN AGCOUT IMMIXOUT AGCWB GND3 MIXIN1 MIXIN2 VREF MIXOUT1 MIXOUT2 GND4 IF1IN GND5 Function Buffered local oscillator output Ground second amplifier Output second amplifier Gain control first amplifier Input second amplifier Supply voltage Output first amplifier Ground Input amplifier sensor Output automatic gain control Output intermodulation mixer connected Threshold adjustment wideband Mixer ground Input double-balanced mixer Input double-balanced mixer Reference voltage output Mixer output Mixer output Ground first amplifier Input first amplifier Oscillator ground Local oscillator (emitter) Local oscillator (base)
U4065B
4807A-AUDR-05/04
U4065B
LOBUFF
Figure Buffered Local Oscillator Output
buffered local oscillator used output, drives input circuit (for example, U428xBM family). typical parallel output resistance parallel output capacitance about When using external load oscillator swing about second harmonic oscillator frequency less than dBc.
GND1
Figure Ground Second Amplifier
There internal connection other ground pins.
IF2OUT
Figure Output Second Amplifier
VREF
parallel output capacitance ground about external load resistance must connected current into typically
Note: supply voltage protected against distortion.
4807A-AUDR-05/04
GAINIF1
Figure Gain Control First Amplifier
VREF
gain first amplifier adjusted resistor ground. This useful, example, compensate insertion loss tolerances ceramic BPFs. must ensured that output current does exceed case. Linear increasing current GAINIF1 results linear increase gain (0.15 dB/µA). thus, Gmin thus, Gmax
IF2IN
Figure Input Second Amplifier
VREF
parallel input resistance parallel input capacitance about current allowed. avoid overload this stage, internal detector watches input level causes current AGCOUT pin.
U4065B
4807A-AUDR-05/04
U4065B
IF1OUT
Figure Output First Amplifier
parallel output resistance which allows standard ceramic BPF. parallel output capacitance about voltage less than
IMIFIN
Figure Input Amplifier Sensor
parallel input resistance amplifier extremely sensitive signals. signal with hundred this will cause current output. Therefore, attention needs paid when connecting standard ceramic filter between IMOUT this pin. reference point filter free signal, current shall appear this pin.
4807A-AUDR-05/04
AGCOUT
Figure Output Automatic Gain Control
output open collector output. current diode this current multiplied current gain external transistor. voltage vary from therefore, this easily used indicator regulation state.
IMMIXOUT
Figure Output Intermodulation Mixer
parallel output resistance which allows standard ceramic without further matching network. must ensured that ground filter free signals.
AGCWB
Figure Threshold Adjustment Wideband
VREF
threshold wideband adjusted external resistor ground. setting range minimum blocking, this connected ground. threshold lower levels, resistance should have value hundred
U4065B
4807A-AUDR-05/04
U4065B
MIXIN1
Figure Input Double-balanced Mixer
VREF 2.5k
parallel input resistance parallel input capacitance about When using mixer unbalanced way, this needs grounded signals external capacitance current allowed.
MIXIN2
Figure Input Double-balanced Mixer
VREF 2.5k
parallel input resistance parallel input capacitance about double sideband noise figure unbalanced mixer about using mixer balanced mode, noise figure will reduced about
VREF
Figure Reference Voltage Output
internal temperature-compensated reference voltage used bias voltage most blocks. Therefore, electrical characteristics U4065B mainly independent supply voltage. internal output resistance reference voltage less than avoid internal coupling across this pin, external capacitors required. maximum output current IREF
4807A-AUDR-05/04
MIXOUT1, MIXOUT2
Figure Mixer Output
mixer output open collector bipolar transistor. minimum voltage these pins voltage swing). current into these pins typically Good suppression mixer output achieved symmetrical load conditions pins MIXOUT1 MIXOUT2.
IF1IN
Figure Input First Amplifier
VREF
typical input resistance voltage almost identical reference voltage. current must avoided this pin.
U4065B
4807A-AUDR-05/04
U4065B
Figure Emitter Local Oscillator
external capacitor connected between ground. ground this capacitor must connected GND5, chip-internal ground local oscillator.
Figure Base Local Oscillator
tank local oscillator connected LOB. ground this tank needs connected GND5, chip-internal ground local oscillator's resonant resistance tank should about Minimum unloaded tank
4807A-AUDR-05/04
Functional Description
U4065B FM-frontend dedicated solution high-end radios. design philosophy enables build tuners with superior behavior. This philosophy based fact that sensitivity state designs physical border cannot enhanced more. other hand, spectral power density FM-band increases. improvement reception only achieved increasing dynamic range receiver. This description give designer introduction familiar with this product philosophy.
Signal Path
U4065B offers complete signal path FM-frontend including highly linear mixer preamplifiers. mixer double-balanced, high-current Gilbert Cell. high transit frequency internal transistors enables emitter grounded circuit with favorable noise behavior. full balanced output offers carrier reduction. first preamplifier dB-linear gain adjustment means. Thus, different ceramic filter losses compensated overall tuner gain adapted individual requirements. noise design suppresses post stage noise signal path. Input output resistance support standard ceramic filters. This achieved without feedback, which would cause different input impedances when varying output impedance. second preamplifier enables three ceramic filters with real inputand output termination. Feedthrough signals kept low. high level output compression necessary keep high dynamic range. Beneath signal path local oscillator part signal generation found chip. local oscillator uses collector grounded colpitts type. phase noise achieved with this access. mutual coupling oscillator coil necessary.
Concept
Special care taken design unique concept. offers loops different kinds reception conditions. most important loop interference sensor part. today's high-end radios, state art. necessary reduce influence higher order intermodulation sustain reception presence strong signals band. hand, makes sense reduce desired signal level possible keep stereo reception, other hand more strong out-of-channel signals interfere generate intermodulation signal desired frequency. introducing input attenuation, level intermod signal decreases higher order, whereas level desired signal shows only linear dependency input attenuation. Therefore, input attenuation diodes keep reception presence strong signals. standard solution generate diode current pick RF-signal front mixer. Because bandwidth that point about MHz, this called wideband AGC. threshold start critical parameter. threshold does allow intermodulation disadvantage blocking there only strong station band intermod signals cover desired channel. higher threshold tolerate certain ground floor intermodulation. This avoids blocking, disadvantage, that reception possible, interfering signals generate intermod signal inside desired channel. This contradiction could overcome past.
U4065B
4807A-AUDR-05/04
U4065B
With U4065B there unique access this problem. This product interference sensor chip. Thus, input signal attenuation only performed interfering signals generate intermod signal inside desired channel. they not, existing wideband active higher levels. optimum state always generated. Figure Figure page illustrate situation. Figure threshold standard tuner high avoid blocking. then intermod signal suppresses desired signal. interference sensor U4065B ensures that threshold kept illustrated Figure page Figure page situation reversed. threshold standard tuner kept avoid intermod problems. then blocking makes desired signal level drop below necessary stereo level. this case, higher wideband level U4065B enables perfect stereo reception. principle, this interference sensor element with third order characteristic. input levels zero, output level zero, too. With increasing input level, output level increased with power three, thus preferring intermod signals compared linear signals. same time, down conversion level 10.7 performed. corresponding 10.7 filter selects intermod signals, only output generated, intermod signal inside 10.7 channel present. circuit blocks interference sensor detector build second chain. system, maximum deviation order intermod signal triple deviation desired signal. Therefore, ceramic between large bandwidth type. This that needed this unique feature. further narrow band avoids overriding second amplifier. amplitude information channel compressed order maintain multipath detection part receiver. Figure High Threshold Causes Intermod Signal Suppress Desired Signal
Level
Interfering signals
Intermod signal
Intermod signal
Desired signal Stereo-level
Noise floor
Desired frequency
Frequency
4807A-AUDR-05/04
Figure Threshold Settings
Level
Interfering signals
Desired signal Intermod signal
Stereo-level Intermod signal
Noise floor
Desired frequency
Frequency
Figure Threshold Causes Blocking Signal Suppress Desired Signal
Level
Strong signal
Stereo-level Desired signal
Noise floor
Desired frequency
Frequency
Figure Correct Threshold Enables Optimum Reception
Level
Strong signal
Desired signal Stereo-level
Noise floor
Desired frequency
Frequency
U4065B
4807A-AUDR-05/04
U4065B
Absolute Maximum Ratings
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Reference point ground (pins Parameters Supply voltage Power dissipation Tamb 85°C Junction temperature Ambient temperature range Storage temperature range Electrostatic handling: Human body model (HBM), pins tested against supply pins Symbol Ptot Tamb Tstg VESD Value +125 2000 Unit
Thermal Resistance
Parameters Thermal resistance Symbol RthJA Value Unit
Electrical Characteristics
MHz, fOSC 108.7 MHz, fOSC 10.7 Reference point ground (pins 22),Tamb 25°C, unless otherwise specified.
Parameters Supply voltage Supply current Test Conditions Between NFDSB Between Between Rignd15 Cignd15 Rignd16 Cignd16 Rii15,16 Cii15,16 Cignd18,19 mA/V Symbol Itot VLOB VLOE VLOBUFF Min. Typ. Max. Unit
Oscillator (GND5 Connected External Oscillator Components) Oscillator voltage Harmonics Output resistance Voltage gain Conversion power gain 3rd-order input intercept Conversion transconductance Noise figure Input resistance ground Input capacitance ground Input resistance ground Input capacitance ground Input-input resistance Input-input capacitance Output capacitance Mixer (GND3 Separated from GND1, GND2 GND4) Source impedance: RG15,16 Load impedance: RL18,19 RG24 unloaded LOSC
4807A-AUDR-05/04
Electrical Characteristics (Continued)
MHz, fOSC 108.7 MHz, fOSC 10.7 Reference point ground (pins 22),Tamb 25°C, unless otherwise specified.
Parameters First Preamplifier Gain control deviation Gain control slope External control current ground Gmin Gnom Gmax Power gain I4min I4nom I4max Noise figure Gmax Gnom Gmin Temperature coefficient gain Gnom compression Gnom cut-off frequency Gnom Input resistance Input capacitance Output resistance Output capacitance Second Preamplifier Source impedance: Load impedance: Between dGIF1/dI4 I4min I4nom I4max Gmin Gnom Gmax NFmin NFnom NFmax TKnom Vcnom fcnom RiIF1 CiIF1 RoIF1 CoIF1 -2.5 0.15 +0.045 dB/µA Test Conditions Symbol Min. Typ. Max. Unit
Source impedance: RG21 Load impedance:
Between
dB/K
Power gain
Between
GIF2 NFIF2
Noise figure compression cutoff frequency Parallel input resistance Parallel input capacitance Parallel output resistance Parallel output capacitance Voltage Regulator Regulated voltage Maximum output current Internal differential resistance, dc17/di17 when Power supply suppression
Vcomp RiIF2 CiIF2 RoIF2 CoIF2 Vref Iref rd17 psrr
U4065B
4807A-AUDR-05/04
U4065B
Electrical Characteristics (Continued)
MHz, fOSC 108.7 MHz, fOSC 10.7 Reference point ground (pins 22),Tamb 25°C, unless otherwise specified.
Parameters input detector Mixer input level wideband sensor fiRF through Test Conditions Between Symbol VthIF2 VthIFD VthWB1 VthWB2 Min. Typ. Max. Unit dBµV dBµV dBµV dBµV Input Voltage Thresholds (AGC Threshold Current
Figure Test Circuit
4.7n 4.7n
Gain 4.7n I18,19 RG21
RL18,19
4.7n RG15,16 Mixer
block adjust (wide band) Voltage regulator VREF
4.7n Interference mixer RG24 Local Interference amplifier
RLOBUFF
4.7n
fOSC COSC
LOSC
oscillator
RG11
470p
Transformers Type
VLOBUFF fLOBUFF
4.7n
4807A-AUDR-05/04
Local Oscillator
Figure Principle Application
RG24 VOSC24 Local oscillator
fOSC
Oscillator output buffer VOSC1, fOSC
Tamb
Free running oscillator frequency fOSC MHz, VOSC24 RG24
Figure Oscillator Swing versus Temperature
VOSC1 (mV)
Tamb (°C)
U4065B
4807A-AUDR-05/04
U4065B
Mixer
fOSC 110.7 MHz, VOSC24 10.7
Figure Mixer Principle Application
VIRF1 fRF1 VIRF2 fRF2
Mixer
VOIF
RG24
Local oscillator
fOSC Tamb
Conversion power gain (VOIF/VIRF) (dB) (dB) IL1, insertion loss transformers
Figure Mixer Characteristic
Conversion characteristic
VOIF (dBµV)
order IM-characteristic
VIRF1, VIRF2 (dBµV)
4807A-AUDR-05/04
Figure Conversion Power Gain Mixer Stage versus Temperature
(dB)
Tamb (°C)
Figure Current Mixer Stage versus Temperature
11.0 10.7 10.4
I18, (mA)
10.1
Tamb (°C)
U4065B
4807A-AUDR-05/04
U4065B
First Preamplifier
Figure First Preamplifier Principle Application
2VIIF
VIIF21 RG21
VOIF7
VOIF
Tamb (pin
Power gain (VOIF/VIIF) (dB) (dB) IL1, insertion loss transformers
Figure Power Gain First Amplifier versus
90°C
(dB)
-30°C
(µA)
4807A-AUDR-05/04
Figure Power Gain First Amplifier versus Frequency
Gmax
GIF1 (dB)
Gnom
Gmin
(MHz)
Figure (Pin versus
90°C
30°C
-30°C
(µA)
U4065B
4807A-AUDR-05/04
U4065B
Second Preamplifier
Figure Second Preamplifier Principle Application
VIIF5 Tamb VOIF3 VOIF
VIIF
Power gain (VOIF/VIIF) (dB) (dB) IL1; insertion loss transformers
Figure Power Gain Second Amplifier versus Temperature
18.5 18.0 17.5
GIF2 (dB)
17.0 16.5 16.0 15.5 15.0
Tamb (°C)
4807A-AUDR-05/04
Figure Power Gain Second Amplifier versus Frequency
GIF2 (dB)
(MHz)
Figure Threshold (110 Second Amplifier versus Temperature
87.0
Threshold (dBµV)
86.8
86.6
86.4
86.2
86.0
Tamb (°C)
Figure Characteristic Second Amplifier Input
10000.00
1000.00
100.00
(90°C)/µA
(µA)
(-30°C)/µA
10.00
1.00
0.10
(30°C)/µA
0.01
VIIF (dBµA)
U4065B
4807A-AUDR-05/04
U4065B
Interference Sensor (Mixer)
Figure Interference Sensor Principle Application
VIRF1 fIRF1 VIRF2 fIRF2 RG15/16
Interference mixer
RL11 VOIF
Local oscillator
Test conditions characteristic VOIF versus VIRF1: MHz, fRF1 89.3 MHz, VIRF2 fRF1 10.7 Test conditions order IM-characteristic VOIF versus VIRF1, VIRF2: MHz, fRF1 89.4 MHz, fRF2 89.5 MHz, fRF1 fRF2) 10.7 IL1, insertion loss transformer Figure Characteristics Interference Sensor (Mixer)
VOIF(dBµV)
Conversion characteristic
order IM-characteristic
VIRF (dBµV)
4807A-AUDR-05/04
Figure Conversion Characteristic Interference Sensor (Mixer)
-30°C
VOIF (dBµV)
30°C
90°C
VIRF (dBµV)
Figure Third-order Interference Characteristic Interference Sensor (Mixer)
VOIF (dBµV)
-30°C
30°C 90°C
VIRF (dBµV)
U4065B
4807A-AUDR-05/04
U4065B
Interference Sensor (Amplifier)
Figure Interference Sensor Principle Application
VIIF9
Tamb
VIIF
Thresholds
Figure Threshold Interference Amplifier versus Temperature
45.0
Threshold (dBµV
44.5 44.0 43.5 43.0 42.5 42.0 41.5 41.0
Tamb (°C)
Figure Wideband Threshold (I10 versus
VIRF (dBµV)
(µA)
4807A-AUDR-05/04
Figure Wideband Threshold (I10 versus Temperature
VIRF 15/16
Tamb (°C)
Characteristics
Figure Characteristic Interference Detector Block
10000.00
-30°C
1000.00
90°C
100.00
(µA)
30°C
10.00
1.00
0.10
0.01
VIIF (dBµV)
Figure Characteristic Wideband (I13
10000.00
1000.00
-30°C
100.00
(µA)
10.00
30°C
1.00
90°C
0.10
0.01
VIIF (dBµV)
U4065B
4807A-AUDR-05/04
U4065B
Figure Characteristic Wideband (V13
10000.00
1000.00
100.00
-30°C
(µA)
10.00
30°C
1.00
0.10
90°C
0.01
VIRF (dBµV)
Characteristics
Figure Supply Current versus Supply Voltage
(mA)
10.0
I18,
Figure Reference Voltage versus Temperature
3.88 3.87 3.86
VREF
3.85 3.84 3.83 3.82 3.81
Tamb (°C)
4807A-AUDR-05/04
Figure Supply Current versus Temperature
(mA)
I18,
Tamb (°C)
Figure Reference Voltage versus
4.00
3.95
VREF
3.90
3.85
3.80
3.75
(mA)
U4065B
4807A-AUDR-05/04
4807A-AUDR-05/04
(Tracking adj.) 100p 150n 4.7p 6.8p 160k 6.8p 120k 1.5k appr.
Figure Application Diagram
BFR93A
S391D
U4065B
BC858 330k 100n Gain adj. 100k
S392D
220nH 470n
VAGC
VTUN
U4065B
Part List
Item CF2, CF3, Description BFR93AR (BFR93A) BC858 S392D S391D BB804 turns, 0.35 wire, diameter (approximately (high type) TOKO® 7KL-type, 600ENF-7251x TOKO 7KL-type, 291ENS 2341IB TOKO 7KL-type, M600BCS-1397N TOKO 7KL-type, 291ENS 2054IB TOKO type (230 KHZ) TOKO type (180 KHZ)
U4065B
4807A-AUDR-05/04
U4065B
Ordering Information
Extended Type Number U4065B-AFL U4065B-AFL3 Package SO24 plastic SO24 plastic Remarks Taping according ICE-286-3
Package Information
Package SO24
Dimensions
15.55 15.30 9.15 8.65
2.35 0.25 0.10 13.97 0.25 10.50 10.20
1.27
technical drawings according specifications
4807A-AUDR-05/04
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4807A-AUDR-05/04

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