Philips TEA6849H User Manual

INTEGRATED CIRCUITS

DATA SH EET

TEA6849H

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

Product speciﬁcation 2003 Dec 19

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

CONTENTS

1 FEATURES 2 GENERAL DESCRIPTION 3 ORDERING INFORMATION 4 QUICK REFERENCE DATA 5 BLOCK DIAGRAM 6 PINNING 7 FUNCTIONAL DESCRIPTION

7.1 Oscillators

7.1.1 VCO

7.1.2 PLL

7.1.3 Crystal oscillator

7.2 DAA

7.3 FM signal channel

7.3.1 FM mixer 1

7.3.2 Buffer output for weather band flag (pin WBFLAG)

7.3.3 FM keyed AGC

7.3.4 FM IF amplifier

7.3.5 FM mixer 2

7.3.6 FM IF2 dynamic selectivity

7.3.7 FM quadrature demodulator

7.3.8 FM MPX soft mute

7.3.9 Adjacent channel detector and threshold extension

7.3.10 Bandwidth control‘active’ flag (pin IFBWFLAG)

7.3.11 Bandwidth control monitor voltage (pin V

7.4 AM signal channel

7.4.1 AM tuner including mixer 1 and mixer 2

7.4.2 AM RF AGC

7.4.3 AM detector

7.4.4 AM noise blanker

7.5 FM and AM level detector

8 LIMITING VALUES 9 THERMAL CHARACTERISTICS

IFBW

10 DC CHARACTERISTICS 11 AC CHARACTERISTICS 12 I2C-BUS PROTOCOL

12.1 I2C-bus specification

12.1.1 Data transfer

12.1.2 I2C-bus pull-up resistors

12.1.3 Frequency setting

12.1.4 Default settings

12.2 I2C-bus protocol

12.2.1 Data transfer mode and IC address

12.2.2 Write mode: data byte 0

12.2.3 Write mode: data byte 1

12.2.4 Write mode: data byte 2

12.2.5 Write mode: data byte 3

12.2.6 Write mode: data byte 4

12.2.7 Write mode: data byte 5

12.2.8 Write mode: data byte 6

12.2.9 Write mode: data byte 7

12.2.10 Read mode: data byte 0 13 TEST AND APPLICATION INFORMATION 14 INTERNAL CIRCUITRY 15 PACKAGE OUTLINE 16 SOLDERING

16.1 Introduction to soldering surface mount packages

16.2 Reflow soldering

16.3 Wave soldering

)

16.4 Manual soldering

16.5 Suitability of surface mount IC packages for wave and reflow soldering methods

17 DATA SHEET STATUS 18 DEFINITIONS 19 DISCLAIMERS 20 PURCHASE OF PHILIPS I2C COMPONENTS

TEA6849H

2003 Dec 19 2

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

1 FEATURES

• FM mixer 1 for conversion of FM RF (65 to 108 MHz and US weather band) to IF of 10.7 MHz; the mixer provides inherent image rejection; for European and US FMband/WB (weather band)themixer is drivenwith a ‘high’ injection Local Oscillator (LO); in Japan FM band and East Europe FM band the mixer is driven with a ‘low’ injection LO

• AM mixer 1 for conversion of AM RF to AM IF1 of

10.7 MHz

• LC tuner oscillator providing mixer frequencies for FM mixer and AM mixer 1

• AM mixer 2 for conversion of AM IF1 to AM IF2 of 450 kHz

• Crystal oscillator providing mixer frequencies for AM mixer 2 and FM mixer 2 and reference for synthesizerPLL, IF count, timingfor Radio DataSystem (RDS) update and reference frequency for car audio signal processor ICs

• Fastsynthesizer PLL tuningsystem with localcontrol for inaudible RDS updating

• Timing function for RDS update algorithm and control signal output for car audio signal processor ICs (TEA688x, SAA77xx, TEF689x)

• I2C-bus adjustable FM MPX soft mute

• Digital alignment circuit for bus controlled matching of

oscillator tuning voltage to FM antenna tank circuit tuning voltage

• AGC PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input; the AGC PIN diode drive can be activated by the I2C-bus as a local function for search tuning; AGC threshold is a programmable and keyed function switchable via the I2C-bus

• FM IF linear amplifier with high dynamic input range

• FM mixer 2 for conversion of FM IF1 to FM IF2 of

450 kHz with inherent image rejection

• Fully integrated dynamic selectivity and FM demodulator at IF2; improved sensitivity with dynamic threshold extension; centre frequency of IF2 selectivity alignment via the I2C-bus

• Level detector for AM and FM with temperature compensated output voltage; starting point and slope of level output is programmable via the I2C-bus

• AM cascode AGCstage and RF PIN diode drive circuit; AGC threshold detection at AM mixer 1 and IF2 AGC input; threshold for detection at mixer 1 input is programmable via the I2C-bus

• AM IF2 AGC and demodulator

• AM AF output switchable to provide AM IF2 for

AM stereo decoder

• AM noise blanker with detection at IF1 and blanking at AM IF2

• Software controlled flag output

• Buffer output for weather band flag

• Adjacent channel detector and modulation detector for

instantaneous bandwidth control of the integrated filter

• Flag and voltage output indicating the actual bandwidth.

2 GENERAL DESCRIPTION

The TEA6849H is a single IC with car radio tuner for AM, FM and Weather Band (WB) intended for microcontroller tuning with the I2C-bus. It provides the following functions:

• AM double conversion receiver for LW, MW and SW (31 m, 41 m and 49 m bands) with IF1 = 10.7 MHz and IF2 = 450 kHz

• FM double conversion receiver with integrated image rejection for IF1and forIF2 capable of selecting US FM, US weather, Europe FM, East Europe FM and Japan FM bands; fully integrated dynamic selectivity at 450 kHz FM IF2; FM demodulator with dynamic threshold extension; centre frequency alignment of IF2 selectivity via the I2C-bus

• The tuning system includes VCO, crystal oscillator and PLL synthesizer on one chip.

TEA6849H

3 ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TEA6849H LQFP80 plastic low proﬁle quad ﬂat package; 80 leads; body 12 × 12 × 1.4 mm SOT315-1

2003 Dec 19 3

PACKAGE

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

4 QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

DDA(n)

DDA(tot)

DDA5

DDD

AM(ant)

FM(ant)

FM(WB)(ant)

amb

AM overall system parameters; see Figs 12 and 13 (S+N)/N signal plus noise-to-noise ratio m = 0.3; BAF= 2.15 kHz − 59 − dB

THD total harmonic distortion m = 0.8; f V

sens(rms)

FM overall system parameters; see Figs 12 and 13 (S+N)/N signal plus noise-to-noise ratio ∆f = 22.5 kHz;

THD total harmonic distortion ∆f = 75 kHz;

sens(rms)

analog supply voltage 1 to 4 and 6 8 8.5 9 V sum of analog supply

currents 1 to 4 and 6

FM mode 45 56 67 mA

AM mode 40 50 60 mA analog supply voltage 5 4.75 5 5.25 V analog supply current 5 FM mode − 7.4 − mA

AM mode − 11 − mA digital supply voltage 4.75 5 5.25 V digital supply current FM mode 21 26 31 mA

AM mode 22 27 32 mA AM input frequency LW 0.144 − 0.288 MHz

MW 0.522 − 1.710 MHz

SW 5.730 − 9.99 MHz FM input frequency 65 − 108 MHz FM weather band input frequency 162.4 − 162.55 MHz ambient temperature −40 − +85 °C

= 1 kHz − 0.3 − %

mod

sensitivity (RMS value) m = 0.3; f

mod

= 1 kHz;

− 45 −µV (S+N)/N = 26 dB; with European dummy aerial 15 pF/60 pF; BAF= 2.15 kHz

− 63 − dB de-emphasis = 50 µs; BAF= 300 Hz to 15 kHz

− 0.35 − % with 2 × SFE10.7MS3

sensitivity (RMS value) ∆f = 22.5 kHz;

= 1 kHz;

mod

− 1.4 2 µV

(S+N)/N = 26 dB; de-emphasis = 50 µs; BAF= 300 Hz to 15 kHz; with 75 Ω dummy antenna

2003 Dec 19 4

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2003 Dec 19 5

MPXDCFDB

OSCFDB

11 10 9

OSCTNK

DDA4

VCO

87654

AMIF2IN

IF1GND

FMMIX2IN

COFFSET

AFSAMPLE

5251 53 54

UPDATE

AM STEREO

FILTER

C-

STABI

bus

AFHOLD

RDS

TRDSMUTE

MUX

DEMOD

321

FMLIMDCFDB1AMIF2DECAMNBHOLD

FMLIMDCFDB2IREFFMIF2

FMMPXRDSMPXAMAFIF2

57 58 59

AMPLIFIER

x1/ x15

RDS

MUTE

SOFT MUTE

MPXOUT

DEMOD

20.5 MHz

LEVEL

DAA

I2C-bus I2C-bus

BANDWIDTH

CONTROL

LEVEL

CRYSTAL

OSCILLATOR

SOFT MUTE

CONTROL

DDA5

POWER SUPPLY

C-BUS

COUNT

FM AM

BUFFER

MODDET

62 63

65 66

68 69

70 71 72 73

74 75

76 77 78 79 80

MDB205

DDA6

IFBWFLAG SDA

SCL

IFBW

IF2GND CINT

MODETOUT TACD

level(AMFM) XTAL1 XTALGND

XTAL2

level(ACD) ACDTHRES

IREF AMMIX2OUT1 AMMIX2OUT2

CAGC V

ref(lim)

DAAIN

DAATD

DAAOUT

TKEYEDAGC

TFMAGC

IFMAGC

WBFLAG

FMMIXIN2

RFGND

FMMIXIN1

ref(MIX)

IAMAGC

THFAMAGC TAFAMAGC

VAMCAS

VAMCASFB

AMMIX1IN

AMMIX1DEC

SWFLAG

CPOUT

C-bus

I2C-bus

LEVEL

tune

42 43 44 45 46 47 48 49

C-bus

÷1/ ÷2/

AM NOISE

DETECTOR

C-bus

MIX1OUT1

AVERAGE

IF2FILI

IF2FILQ

FMMUTE

ANTENNA

DAA

AGC

35 34

33 32

I/Q MIXER 1

28 27

26 25

MIXER 1

90°

AGC

÷10/

÷20

DDA2

MIX1OUT2

i.c.

FREF

DDA3

TUNING SYSTEM

TEA6849H

WB/JAPAN/OIRT

÷3 90°

PEAK/

BLANK PULSE

IFAMPDEC

IFAMPIN

DDD

14 13

DGND

MIXER 2

÷2

MIXER 2

DDA1

IFAMPOUT

IFCDAATEST

VCOGND

FMMIX2DEC

5 BLOCK DIAGRAM

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

Precision Adjacent Channel Suppression (NICE-PACS)

TEA6849H

Fig.1 Block diagram.

handbook, full pagewidth

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

6 PINNING

SYMBOL PIN DESCRIPTION

FMLIMDCFDB1 1 decoupling in-phase FM limiter FMLIMDCFDB2 2 decoupling quadrature phase FM limiter AMIF2DEC 3 decoupling for AM IF2 input IREFFMIF2 4 reference current for FM IF2 AMNBHOLD 5 AM noise blanker threshold AMIF2IN 6 AM IF2 input (450 kHz) for demodulator AGC and AM level detector IF1GND 7 AM IF1 ground FMMIX2IN 8 FM mixer 2 input COFFSET 9 DC feedback for offset compensation RDS mute FMMIX2DEC 10 FM mixer 2 decoupling IFCDAATEST 11 test pin for IF centre DAA IFAMPOUT 12 IF ampliﬁer output (10.7 MHz) V

DDA1

IFAMPIN 14 FM IFampliﬁer and AM mixer 2 input (10.7 MHz) IFAMPDEC 15 FM IF ampliﬁer and AM mixer 2 decoupling IF2FILQ 16 test output quadrature phase FM IF2 ﬁlter; time constant FM soft mute IF2FILI 17 test output in-phase FM IF2 ﬁlter MIX1OUT1 18 FM mixer and AM mixer 1 IF output 1 (10.7 MHz) MIX1OUT2 19 FM mixer and AM mixer 1 IF output 2 (10.7 MHz) V

DDA2

SWFLAG 21 output software programmable ﬂag AMMIX1DEC 22 AM mixer 1 decoupling AMMIX1IN 23 AM mixer 1 input VAMCASFB 24 feedback for cascode AM AGC VAMCAS 25 cascode AM AGC TAFAMAGC 26 AF time constant of AM front-end AGC THFAMAGC 27 HF time constant of AM front-end AGC IAMAGC 28 PIN diode drive current output of AM front-end AGC V

ref(MIX)

FMMIXIN1 30 FM RF mixer input 1 RFGND 31 RF ground i.c. 32 internal connection FMMIXIN2 33 FM RF mixer input 2 WBFLAG 34 buffered weather band ﬂag output IFMAGC 35 PIN diode drive current output of FM front-end AGC TFMAGC 36 time constant of FM front-end AGC TKEYEDAGC 37 time constant of keyed FM front-end AGC DAAOUT 38 output of digital auto alignment circuit for antenna tank circuit DAATD 39 temperature compensation diode for digital auto alignment circuit for antenna tank circuit DAAIN 40 input of digital auto alignment circuit for antenna tank circuit

13 analog supply voltage 1 (8.5 V) for FM IF ampliﬁer

20 analog supply voltage 2 (8.5 V) for FM and AM RF

29 reference voltage for FM RF mixer

2003 Dec 19 6

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PIN DESCRIPTION

FMMUTE 41 test output for FM soft mute bits V

tune

CPOUT 43 charge pump output V

DDA3

FREF 45 reference frequency output for signal processor IC V

DDD

DGND 47 digital ground VCOGND 48 VCO ground OSCFDB 49 VCO feedback OSCTNK 50 VCO tank circuit V

DDA4

MPXDCFDB 52 DC feedback for FM MPX signal path AFSAMPLE 53 AF sample ﬂag output for car audio signal processor IC AFHOLD 54 AF hold ﬂag output for car audio signal processor IC TRDSMUTE 55 time constant for RDS update mute AMAFIF2 56 AM demodulator AF output or IF2 output for AM stereo (multiplexed by I2C-bus) RDSMPX 57 MPX output for RDS decoder and signal processor (not muted) FMMPX 58 FM demodulator MPX output V

DDA5

MODDET 60 modulation detector input V

DDA6

IFBWFLAG 62 FM IF2 bandwidth ﬂag output SDA 63 I2C-bus data line input and output SCL 64 I2C-bus clock line input V

IFBW

IF2GND 66 AM IF2 ground CINT 67 demodulator loop ﬁlter MODETOUT 68 modulation detector output TACD 69 adjacent channel detector time constant V

level(AMFM)

XTAL1 71 crystal oscillator 1 XTALGND 72 crystal oscillator ground XTAL2 73 crystal oscillator 2 V

level(ACD)

ACDTHRES 75 adjacent channel detector threshold IREF 76 reference current for power supply AMMIX2OUT1 77 AM mixer 2 output 1 (450 kHz) AMMIX2OUT2 78 AM mixer 2 output 2 (450 kHz) CAGC 79 AM IF AGC capacitor V

ref(lim)

42 tuning voltage

44 analog supply voltage 3 (8.5 V) for tuning PLL

46 digital supply voltage (5 V)

51 analog supply voltage 4 (8.5 V) for VCO

59 analog supply voltage 5 (5 V) for on-chip power supply

61 analog supply voltage 6 (8.5 V) for on-chip power supply

65 monitor voltage for FM IF2 bandwidth

70 level voltage output for AM and FM

74 level voltage output for adjacent channel detector

80 limiter reference voltage

2003 Dec 19 7

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

handbook, full pagewidth

FMLIMDCFDB1 FMLIMDCFDB2

AMIF2DEC

IREFFMIF2

AMNBHOLD

AMIF2IN

IF1GND FMMIX2IN COFFSET

FMMIX2DEC

IFCDAATEST

IFAMPOUT

DDA1

IFAMPIN

IFAMPDEC

IF2FILQ

IF2FILI MIX1OUT1 MIX1OUT2

DDA2

ref(lim)

80 1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

AMMIX2OUT2

CAGC 79

AMMIX2OUT1

IREF

level(ACD)

ACDTHRES

XTAL2 73

XTALGND

XTAL1

TEA6849H

level(AMFM)

TACD 69

MODETOUT

CINT

IF2GND 66

IFBW

V 65

SCL

SDA 63

TEA6849H

DDA6

IFBWFLAG 62

MODDET V

FMMPX

RDSMPX

AMAFIF2

TRDSMUTE

AFHOLD

AFSAMPLE

MPXDCFDB

OSCTNK

OSCFDB

VCOGND

DGND

46 45

FREF V

CPOUT

FMMUTE

DDA5

DDA4

DDD

DDA3

tune

ref(MIX)

SWFLAG

AMMIX1DEC

AMMIX1IN

VAMCASFB

VAMCAS

TAFAMAGC

IAMAGC

THFAMAGC

Fig.2 Pin configuration.

2003 Dec 19 8

RFGND

FMMIXIN1

32 i.c.

WBFLAG

FMMIXIN2

IFMAGC

TFMAGC

DAATD

DAAOUT

TKEYEDAGC

DAAIN

MHC426

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

7 FUNCTIONAL DESCRIPTION

7.1 Oscillators

7.1.1 VCO Thevaractortuned VCO providesthelocaloscillator signal

for both FM and AM mixer 1. It has a frequency range of

162.9 to 248.2 MHz.

7.1.2 PLL Fast synthesizer PLL tuning system with local control for

inaudible RDS updating.

7.1.3 CRYSTAL OSCILLATOR The crystal oscillator provides a 20.5 MHz signal that is

used for:

• Reference frequency for frequency synthesizer PLL

• Local oscillator for AM mixer 2 and FM mixer 2

• Reference frequency for the IF counter

• Timing signal for the RDS update algorithm

• Referencefrequency (75.368 kHz) fortheTEA688x (car

audio signal processor - CASP) or TEF689x (car radio integrated signal processor - CRISP).

7.2 DAA

To reduce the numberof manual alignments in production the following I2C-bus controlled Digital Auto Alignment (DAA) functions are included:

• FM RF DAA – 7-bit DAA circuitry for the conversion of the VCO

tuning voltage to a controlled alignment voltage for the FM antenna tank circuit

• FM and AM level DAA – Level DAA circuitry for alignment of slope (3-bit) and

starting point (5-bit) of the level curve

• IF2 centre DAA – Centre frequency alignment (7-bit) of integrated

FM IF2 dynamic selectivity.

7.3 FM signal channel

7.3.1 FM MIXER 1 FM quadraturemixer converts FM RF (65 to 108 MHzand

weather band) to IF of 10.7 MHz. The FM mixer provides inherent image rejection and high RF sensitivity.

It is capable of tuning the US FM, US weather, Europe FM, Japan FM and East Europe FM bands:

• US FM = 87.9 to 107.9 MHz

• US weather FM = 162.4 to 162.55 MHz

• Europe FM = 87.5 to 108 MHz

• Japan FM = 76 to 91 MHz

• East Europe FM = 65 to 74 MHz.

7.3.2 BUFFER OUTPUT FOR WEATHER BAND FLAG (PIN WBFLAG)

The buffer output on pin WBFLAG is HIGH for weather band mode.

7.3.3 FM KEYED AGC

The AGC threshold is programmable and the keyed AGC function is switchable via the I2C-bus. AGC detection occurs at the input of the first FM mixer. If the keyed AGC function is activated, the AGC is keyed only by the narrow band level. The AGC PIN diode drive can be activated via the I2C-bus as a local function forsearch tuning.The AGC sourcesa constant10 mA current intothe FMPIN diode in AM mode.

7.3.4 FM IF AMPLIFIER

The FM IF amplifier provides 18 dB amplification withhigh linearity over a wide dynamic range.

7.3.5 FM MIXER 2

The FM mixer 2 converts 10.7 MHz FM IF1 to 450 kHz FM IF2 in I and Q phase to achieve image rejection in the demodulator.

TEA6849H

2003 Dec 19 9

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)

7.3.6 FM IF2 DYNAMIC SELECTIVITY The IF bandwidth of the FM IF2 is automatically adjusted

depending on modulation and reception conditions. The centre frequency of the selectivity is adjusted by a 7-bit instruction via the I2C-bus. The dynamic selectivity mode and three fixed bandwidths (60, 90 and 130 kHz) can be selected via the I2C-bus. The IF2 bandwidth is set to 13 kHz in weather band mode.

7.3.7 FM QUADRATURE DEMODULATOR The FM quadrature demodulator is adjustment free.

7.3.8 FM MPX SOFT MUTE Muting depth and start of muting are adjustable via the

I2C-bus (see Figs 8 and 9).

7.3.9 ADJACENT CHANNEL DETECTOR AND THRESHOLD

EXTENSION

In the event of breakthrough of a strong neighbouring transmitter, the IF2 bandwidth is reduced dynamically. At lowRF inputvoltages and lowmodulation levels theIF2 bandwidth is reduced to achieve improved sensitivity by demodulator threshold extension.

7.4.2 AM RF AGC

The AM wideband AGC in front of the first AM mixer is realized first bya cascadedNPN transistor, whichcontrols the transconductance of theRF amplifier JFET with 10 dB of AGC range. Second, an AM PIN diode stage with antenna type and frequency dependent AGC range is available. The minimum JFET drain source voltage is controlled by a DC feedback loop (pin VAMCASFB) in order to limit the cascode AGC range to 10 dB. If the cascode AGC is not required, a simple RF AGC loop is possible by using only a PIN diode. In this event pins VAMCASFB and VAMCAS have to be open-circuit. In FM mode, the cascade switches off the JFET bias current to reduce totalpower consumption. The PIN diode is biased by 1 mA in FM mode.

The AGC detection points for AM AGC are at the first AM mixer input (threshold programmable via the I the IF2 AGC input (fixed threshold).

7.4.3 AM DETECTOR

The AM output provides either a detected AM AF or the corresponding AM IF2 signal. The IF2 signal can be used for AM stereo decoder processing. Soft mute function is controlled by the I2C-bus in AM mono mode.

TEA6849H

C-bus) and

7.3.10 BANDWIDTH CONTROL ‘ACTIVE’ FLAG (PIN IFBWFLAG)

Flag output IBFW = 1 from pin IFBWFLAG indicates that the IF2 bandwidth is reduced.

7.3.11 BANDWIDTH CONTROL MONITOR VOLTAGE (PIN V

Theactual bandwidth isindicated by a voltageat pin V that is proportional, not linear, to the IF bandwidth.

7.4 AM signal channel

7.4.1 AM TUNER INCLUDING MIXER 1 AND MIXER 2

The AM tuner is realized in a doubleconversion technique and is capable of selecting LW, MW and SW bands.

AM mixer 1 converts AM RF to IF1 of 10.7 MHz, while AM mixer 2 converts IF1 of 10.7 MHz to IF2 of 450 kHz:

• LW = 144 to 288 kHz

• MW = 530 to 1710 kHz (US AM band)

• SW = 5.73 to 9.99 MHz (including the 31 m, 41 m and

49 m bands).

IFBW

)

IFBW

7.4.4 AM NOISE BLANKER The detection point for the AM noise blanker is the output

stage of AM mixer 1, while blanking is realized at the output of the mixer 2.

Trigger sensitivity can be modified by adding an external resistor at pin AMNBHOLD.

7.5 FM and AM level detector

FM and AM level detectors provide the temperature compensated output voltage. The starting points and slopes of the level detector outputs are programmable via the I2C-bus.

2003 Dec 19 10

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

8 LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

DDA1

DDA2

DDA3

DDA4

DDA5

DDA6

DDD

∆V

DD8.5-DD5

stg

amb

analog supply voltage 1 for FM IF ampliﬁer −0.3 +10 V analog supply voltage 2 for FM and AM RF −0.3 +10 V analog supply voltage 3 for tuning PLL −0.3 +10 V analog supply voltage 4 for voltage controlled

−0.3 +10 V

oscillator analog supply voltage 5 for on-chip power supply −0.3 +6.5 V analog supply voltage 6 for on-chip power supply −0.3 +10 V digital supply voltage −0.3 +6.5 V difference between any 8.5 V supply voltage and

note 1 −0.3 − V

any 5 V supply voltage storage temperature −55 +150 °C ambient temperature −40 +85 °C electrostatic handling voltage note 2 −200 +200 V

note 3 −2000 +2000 V

Notes

1. To avoiddamage and wrong operation it is necessary to keep all 8.5 Vsupply voltagesat a higher level than any 5 V

supply voltage. This is also necessary during power-on and power-down sequences. Precautions have to be provided in such a way that interference cannot pull down the 8.5 V supply below the 5 V supply.

2. Machine model (R = 0 Ω, C = 200 pF).

3. Human body model (R = 1.5 kΩ, C = 100 pF).

9 THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R R

th(j-a) th(j-c)

thermal resistance from junction to ambient in free air 54 K/W thermal resistance from junction to case 9 K/W

2003 Dec 19 11

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

10 DC CHARACTERISTICS

= 8.5 V; V

DDA6

speciﬁed.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply voltage

DDA(n)

DDA5

DDD

Supply current in FM mode

DDD

DDA1

DDA2

DDA3

DDA4

DDA5

DDA6

MIX1OUT1

MIX1OUT2

Supply current in AM mode

DDD

DDA1

DDA2

DDA3

DDA4

DDA5

DDA6

MIX1OUT1

MIX1OUT2

AMMIX2OUT1

AMMIX2OUT2

On-chip power supply reference current generator: pin IREF

o(ref)

o(max)

DDA5

=5V; V

DDD

=5V; T

=25°C; tested in the circuit of Figs 12 and 13; unless otherwise

amb

analog supply voltages 1 to 4 and 6 8 8.5 9 V analog supply voltage 5 4.75 5 5.25 V digital supply voltage 4.75 5 5.25 V

digital supply current Europe/US band 21 26 31 mA

Japan/East Europe band 26.5 33 39.5 mA

analog supply current 1 for FM IF

5.5 7.3 8.8 mA

ampliﬁer analog supply current 2 for FM RF 4.2 5.2 6.2 mA analog supply current 3 for tuning PLL 3.2 4 4.8 mA analog supply current 4 for VCO 5.2 6.5 7.8 mA analog supply current 5 for on-chip

power supply analog supply current 6 for on-chip

Europe/US band − 3.8 − mA Japan/East Europe band − 7.4 − mA

21.5 27 32.5 mA

power supply bias current of FM mixer output 1 4.8 6 7.2 mA bias current of FM mixer output 2 4.8 6 7.2 mA

digital supply current 22 27 32 mA analog supply current 1 for

100 120 140 µA

AM mixer 2 analog supply current 2 for RF 1.4 1.8 2.2 mA analog supply current 3 for tuning PLL 1.8 2.2 2.6 mA analog supply current 4 for VCO 5 6.5 8 mA analog supply current 5 for on-chip

− 11 − mA

power supply analog supply current 6 for on-chip

14 17.5 21 mA

power supply bias current of AM mixer 1 output 1 4.8 6 7.2 mA bias current of AM mixer 1 output 2 4.8 6 7.2 mA bias current of AM mixer 2 output 1 3.6 4.5 5.4 mA bias current of AM mixer 2 output 2 3.6 4.5 5.4 mA

output reference voltage R output resistance R maximum output current R

= 120 kΩ 4 4.25 4.5 V

IREF

= 120 kΩ−10 − kΩ

IREF

= 120 kΩ−100 − +100 nA

IREF

2003 Dec 19 12

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

11 AC CHARACTERISTICS

DDA(n)=VMIX1OUT1=VMIX1OUT2=VAMMIX2OUT1=VAMMIX2OUT2

circuit of Figs 12 and 13; all AC values are given in RMS; unless otherwise speciﬁed.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Voltage controlled oscillator

osc

C/N carrier-to-noise ratio f

oscillator frequency 162.9 − 248.2 MHz

= 200 MHz; ∆f = 10 kHz − 97 −

osc

= 100 Hz;

ripple rejection

∆

osc

-----------f

osc

ripple

DDA4(ripple)

= 200 MHz

osc

Crystal oscillator

xtal

C/N carrier-to-noise ratio f

IRCUIT INPUTS: PINS XTAL1, XTALGND AND XTAL2

o(osc)(rms)

crystal frequency − 20.5 − MHz

= 20.5 MHz; ∆f = 10 kHz − 112 −

xtal

oscillator output voltage

note 1 80 100 160 mV

(RMS value)

XTAL1

, V

XTAL2

DC bias voltage 1.7 2.1 2.5 V real part of input

XTAL1

− V

impedance

input capacitance note 1 8 10 12 pF

Synthesizer

= 8.5 V;V

DDD=VDDA5

=5V;T

=25°C; tested in the

amb

92 99 − dB

= 100 mV (RMS);

= 1 mV; note 1 −250 −−Ω

XTAL2

dBc

----------- Hz

dBc

----------- Hz

PROGRAMMABLE DIVIDER N

∆N

prog

step

programmable divider ratio 512 − 32767 programmable divider step

size CHARGE PUMP: PIN CPOUT I

sink(cp1)l

low charge pump 1 sink

current

0.4 V < V

CPOUT

data byte 3: bit 0 = 0, bit1=1, bit 2 = 1 for FM weather band;

source(cp1)l

low charge pump 1 source

current

VCO>fref

0.4 V < V data byte 3: bit 0 = 0, bit1=1,

× divider ratio

CPOUT

bit 2 = 1 for FM weather band;

sink(cp1)h

high charge pump 1 sink

current

VCO<fref

0.4 V < V data byte 3: bit 0 = 1, bit1=1,

× divider ratio

CPOUT

bit 2 = 1; AM stereo mode; VCO divider = 10 (LWand MW); f

VCO>fref

× divider ratio

2003 Dec 19 13

< 7.6 V;

− 1 −

− 300 −µA

−−300 −µA

− 1 − mA

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

source(cp1)h

sink(cp2)

source(cp2)

CHARGE PUMP: PIN V I

sink(cp3)

source(cp3)

Antenna Digital Auto Alignment (DAA)

highcharge pump 1 source

current

0.4 V < V data byte 3: bit 0 = 1, bit1=1, bit 2 = 1; AM stereo mode; VCO divider = 10 (LWand MW); f

VCO<fref

charge pump 2 sink current 0.3 V < V

data byte 3: bit 0 = 0, bit1=0, bit 2 = 0; FM standard mode; f

VCO>fref

charge pump 2 source

current

0.3 V < V data byte 3: bit 0 = 0, bit1=0, bit 2 = 0; FM standard mode; f

VCO<fref

tune

charge pump 3 sink current 0.4 V < V

data byte 3: bit 0 = 0, bit1=0, bit 2 = 0; FM standard mode; f

VCO>fref

charge pump 3 source

current

0.4 V < V data byte 3: bit 0 = 0, bit1=0, bit 2 = 0; FM standard mode; f

VCO<fref

< 7.6 V;

CPOUT

× divider ratio

< 7.1 V;

CPOUT

× divider ratio

< 7.1 V;

CPOUT

× divider ratio

< 7.6 V;

tune

× divider ratio

< 7.6 V;

tune

× divider ratio

−−1 − mA

− 130 −µA

−−130 −µA

− 3 − mA

−−3 − mA

DAA INPUT: PIN DAAIN I

bias(cp)

charge pump buffer input

bias current V

i(cp)

charge pump buffer input

voltage DAA OUTPUT: PIN DAAOUT; note 2 V

o(AM)

DAA output voltage in

AM mode V

o(FM)

DAA output voltage in

FM mode

= 0.4 to 8 V −10 − +10 nA

DAAIN

0 − 8.5 V

DAAOUT

minimum value;

< 100 µA −− 0.3 V

−− 0.5 V data byte 2 = 10000000; V

= 0.5 V; V

DAAIN

maximum value;

DAATD

= 0.45 V

8 − 8.5 V data byte 2 = 11111111; V

DAAIN

= 4.7 V; V =4V; V

DAATD

= 0.45 V

= 0.45 V data byte 2 = 10000000 − 0.65 − V data byte 2 = 11000000 3.8 4 4.2 V

DAAIN

=2V; V

DAATD

= 0.45 V data byte 2 = 11010101 2.3 2.6 2.9 V data byte 2 = 10101010 1.2 1.4 1.6 V

2003 Dec 19 14

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

o(n)

∆V

o(T)

∆V

o(step)

∆V

o(sink)

∆V

o(source)

DAA TEMPERATURE COMPENSATION: PIN DAATD I

source

IF counter (FM IF2 or AM IF2 counter)

PINS FMMIX2IN AND FMMIX2DEC; note 3 V

sens(rms)

N counter result (decimal) period = 2 ms;

DAA output noise voltage data byte 2 = 11000000;

FM mode; V V

DAATD

= 0.45 V;

DAAIN

=4V;

B = 300 Hz to 22 kHz

DAA output voltage variation with temperature

= −40 to +85 °C;

amb

data byte 2 = 11000000

DAA step accuracy n = 0 to 127; FM mode;

DAA output variation

DAAOUT

DAAIN

= 0.5 to 8 V;

=2V; V

DAATD

= 0.45 V

=4V; IL=50µA −V

caused by sink current DAA output variation

=4V; IL= −50 µA −V

DAAIN

caused by source current DAA output settling time V

DAAOUT

= 0.2 to 8.25 V;

CL= 270 pF

ripple rejection

DAAOUT

---------------------- V

DDA3

data byte 2 = 10101011; FM mode; V V V

= 0.45 V; f

DAATD DDA3(ripple)

=4V;

DAAIN

ripple

= 100 mV (RMS)

DAA output load capacitance

compensation diode

DAATD

= 0.2 to 1.2 V −50 −40 −30 µA

source current temperature coefﬁcient of

compensation diode

V T

= 0.2 to 1.2 V;

DAATD

= −40 to +85 °C

amb

source current

IF counter length for AM and FM

sensitivity voltage

FM mode − 30 100 µV

(RMS value)

FMMIX2IN-FMMIX2DEC

= 100 µV prescaler ratio = 10 − 90 − prescaler ratio = 40 − 22 −

period = 20 ms; V

FMMIX2IN-FMMIX2DEC

= 100 µV prescaler ratio = 10 − 132 − prescaler ratio = 40 − 225 −

= 100 Hz;

− 30 100 µV

−8 − +8 mV

0.5V

LSB

LSBVLSB

− +V

1.5V

LSB

− 20 30 µs

− 65 − dB

−− 270 pF

−300 − +300

− 8 − bit

-----------

6–

2003 Dec 19 15

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

PINS AMIF2IN AND AMIF2DEC; note 4 V

sens(rms)

N counter result (decimal) period = 2 ms;

Reference frequency for car signal processor IC TEA688x and TEF689x; note 5 REFERENCE FREQUENCY DIVIDER

ref

VOLTAGE GENERATOR: PIN FREF V

o(p-p)

L(min)

Weather band ﬂag: pin WBFLAG

source(max)

i(shunt)

o(max)

AM signal channel

sensitivity voltage

AM mode; m = 0 − 30 70 µV

(RMS value)

− 132 −

crystal oscillator divider

AMIF2IN-AMIF2DEC

period = 20 ms; V

AMIF2IN-AMIF2DEC

= 200 µV

− 40 −

= 200 µV

− 272 −

ratio reference frequency f

AC output voltage

= 20.5 MHz − 75.368 − kHz

xtal

not loaded 60 90 − mV

(peak-to-peak value) DC output voltage 3.2 3.4 3.7 V output resistance −− 50 kΩ minimum load resistance

1 −−MΩ

for ﬁrst I2C-bus address

maximum source current −−5 − mA internal shunt resistance to

− 50 − kΩ

ground maximum output voltage

for FM mode output voltage for weather

band mode

measured with respect to pin RFGND

0 − 0.2 V

4 − 5V

AM RF AGC STAGE (PIN DIODE DRIVE) V

i(p)

RF input voltage for wideband AGC start level (peak value)

m = 0.3; data byte 4: bit5=0, bit 6 = 0

m = 0.3; data byte 4: bit5=1, bit 6 = 0

m = 0.3; data byte 4: bit5=0, bit 6 = 1

m = 0.3; data byte 4: bit5=1,

bit 6 = 1 AM IF AGC STAGE INPUT: PIN AMIF2IN V

i(p)

IF2 input voltage

AGC start level 0.20 0.27 0.35 V

(peak value)

2003 Dec 19 16

− 150 − mV

− 275 − mV

− 400 − mV

− 525 − mV

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

AM RF AGC CURRENT GENERATOR OUTPUT: PIN IAMAGC I

sink(max)

sink

RF CASCODE AGC I

cas(off)

Pin VAMCASFB

cas(FB)

Pin VAMCAS

cas

AM MIXER 1 (IF1 = 10.7 MHZ)

maximum AGC sink

Vo=2.8V 1115 19mA

current AGC sink current FM mode 1 −−mA output resistance Io=1µA 0.5 −−MΩ AM AGC current generator

− 57pF

output capacitance

AM cascode off current FM mode −− 100 nA

cascode feedback voltage V

AMMIX1IN-AMMIX1DEC

above

− 0.26 − V

threshold; minimum gain

cascode feedback sense

0 − 1 µA

current

cascode voltage V

AMMIX1IN-AMMIX1DEC

below

− 5 − V

threshold; maximum gain

cascode transistor base

100 −−µA

current capability

Mixer inputs: pins AMMIX1DEC and AMMIX1IN

R C V V

i I i(max)

input resistance note 6 15 25 40 kΩ input capacitance note 6 2.5 5 7.5 pF DC input voltage 2.3 2.7 3.1 V maximum input voltage 1 dB compression point of

Mixer outputs: pins MIX1OUT1 and MIX1OUT2

o(max)(p-p)

output resistance note 7 100 −−kΩ output capacitance note 7 − 47pF maximum output voltage

(peak-to-peak value)

bias

mixer bias current AM mode 4.8 6 7.2 mA

Mixer

m(conv)

conversion transconductance

MIX1OUT

--------------------V

MIX1IN

MIX1OUT1-MIX1OUT2

; m = 0

500 −−mV

12 15 − V

2.0 2.55 3.2

-------- V

2003 Dec 19 17

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

m(conv)(T)

IP3 3rd-order intermodulation RL= 2.6 kΩ (AC load between

IP2 2nd-order intermodulation RL= 2.6 kΩ (AC load between

i(n)(eq)

F noise ﬁgure of AM mixer 1 − 4.5 7.1 dB AM MIXER 2 (IF2 = 450 kHz)

Mixer inputs: pins IFAMPIN and IFAMPDEC

i(max)(p)

Mixer outputs: pins AMMIX2OUT1 and AMMIX2OUT2

o(max)(p-p)

bias

Mixer

m(conv)

m(conv)(T)

IP3 3rd-order intermodulation RL= 1.5 kΩ (AC load between

IP2 2nd-order intermodulation RL= 1.5 kΩ (AC load between

i(n)(eq)

conversion

−−9 × 10−4− K transconductancevariation with temperature

∆

m(conv)

--------------------------------g

m(conv)

T∆×

135 138 − dBµV

output pins); ∆f = 300 kHz

− 170 − dBµV

output pins)

equivalent input noise voltage

band limited noise; R

= 750 Ω; RL= 2.6 kΩ

gen

− 5.8 8

----------- -

(AC load between output pins)

input resistance note 8 − 330 −Ω input capacitance note 8 − 57pF DC voltage 2.4 2.7 3 V maximum input voltage

(peak value)

1 dB compression point of V

AMMIX2OUT1-AMMIX2OUT2

1.1 1.4 − V

output resistance note 9 50 −−kΩ output capacitance note 9 − 47pF maximum output voltage

= 8.5 V 12 15 − V

DDA6

(peak-to-peak value) mixer bias current AM mode 3.6 4.5 5.4 mA

conversion transconductance

AMMIX2OUT

---------------------------V

IFAMPIN

conversion

1.3 1.6 1.9

−−9 × 10−4− K

-------- -

transconductancevariation with temperature

∆

m(conv)

---------------------------------

m(conv)

T∆×

134 137 − dBµV

output pins); ∆f = 300 kHz

− 170 − dBµV

output pins)

equivalent input noise voltage

= 330 Ω; RL= 1.5 kΩ

gen

(AC load between output pins)

− 15 22

----------- -

−1

2003 Dec 19 18

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

F noise ﬁgure of AM mixer 2 − 16 19.5 dB I

AM IF2 AGC STAGE: PINS AMIF2IN AND AMIF2DEC; note 4 V

AGC(start)

AGC(stop)

AGC(ctrl)

∆AGC AGC range between start and stop of AGC − 89 − dB R

AM DETECTOR V

sens(rms)

(S+N)/N maximum signal plus

THD total harmonic distortion BAF= 2.15 kHz; C

Output: pin AMAFIF2

o(rms)

mixer leakage current FM mode −− 10 µA

input voltage audio attenuation α = −10 dB

data byte 4: bit 4 = 1; mute on − 25 40 µV

data byte 4: bit 4 = 0; mute off − 610µV AGC start voltage input carrier voltage − 14 30 µV AGC stop voltage maximum input peak voltage 1 −−V AGC control voltage Vi= 1 mV 4.1 4.3 4.7 V

input resistance 1.8 2 2.2 kΩ input capacitance − 10 15 pF

sensitivity voltage (RMS value)

m = 0.3; f

= 400 Hz;

mod

BAF= 2.15 kHz; R

gen

=2kΩ;

note 4

(S+N)/N = 26 dB − 45 65 µV

(S+N)/N = 46 dB − 600 900 µV

noise-to-noise ratio

m = 0.3; f BAF= 2.15 kHz; R

AMIF2IN

= 400 Hz;

mod

=2kΩ

gen

=10µF;

AGC

= 100 µV to 250 mV

− 60 − dB

(RMS)

FM to AM switching time V AM AGC settling time V

AM IF2 output voltage (RMS value)

m = 0.8; f

AMIF2IN AMIF2IN

AMIF2IN

AM stereo; m = 0; data byte 3: bit 0 = 1, bit 1 = 1, bit 2 = 1

minimum V

maximum V

AM mono; m = 0.3; data byte 3:

= 400 Hz − 0.5 1 %

mod

= 100 Hz − 1.25 2.5 %

mod

= 100 µV; C

=10µF − 1000 1500 ms

AGC

= 100 µV to 100 mV − 400 600 ms = 100 mV to 100 µV − 600 900 ms

=14µV 1.5 3 4.5 mV

AMIF2IN

= 5 mV 130 180 230 mV

AMIF2IN

200 250 300 mV bit 0 = 1, bit 1 = 0, bit 2 = 1; f

= 400 Hz;

mod

AMIF2IN

= 100 µV to 500 mV

(RMS)

output resistance data byte 3: bit 0 = 1, bit1=1,

−− 500 Ω

bit 2 = 1; AM stereo data byte 3: bit 0 = 1, bit1=0,

−− 500 Ω

bit 2 = 1; AM mono

2003 Dec 19 19

Philips Semiconductors Product speciﬁcation

New In Car Entertainment car radio tuner IC with

TEA6849H

Precision Adjacent Channel Suppression (NICE-PACS)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

RR ripple rejection V

AM IF2 LEVEL DETECTOR OUTPUT: PIN V V

level(AMFM)

∆V

level(AMFM)

level(slope)

∆V

step

level(AMFM)

output capacitance data byte 3: bit 0 = 1, bit1=0,

− 57pF

bit 2 = 1

load impedance data byte3: bit 0 = 1, bit1=0,

100 −−kΩ bit 2 = 1; AM mono

data byte 3: bit 0 = 1, bit1=1,

10 −−kΩ bit 2 = 1; AM stereo

level(AMFM)

DC output voltage V

DDA5(ripple)

= 100 Hz

ripple

DDA6(ripple)

= 100 Hz

ripple

; see Fig.4

AMIF2IN

= 100 mV (RMS);

=10µVto1V 0 − 7V <1µV;standard setting

− 24 − dB

− 26 − dB

0.1 0.5 0.9 V

of level DAA V

AMIF2IN

= 1.4 mV; standard

1.6 2.2 2.8 V

setting of level DAA

step size for adjustment of level starting point

slope of level voltage V

AMIF2IN

= 0 V; standard setting

of level slope

AMIF2IN

= 140 µV to 140 mV;

30 40 50 mV

650 800 950 standard setting of level slope

step size for adjustment of

AMIF2IN

= 1.4 mV 45 60 75

level slope bandwidth of level output

voltage

AMIF2IN

= 15 mV; standard

setting of level DAA

200 300 − kHz

output resistance −− 500 Ω

ripple rejection

level

--------------- V

DDA6

DDA6(ripple)

ripple

= 100 mV (RMS);

= 100 Hz

− 36 − dB

--------------20 dB

AM NOISE BLANKER; TEST SIGNAL AND TEST CIRCUIT; see Fig.5

Threshold: pin AMNBHOLD

sup

trigger

DC output voltage 4.3 4.6 5.1 V suppression time V

trigger sensitivity frequency V

= 200 mV (peak);

pulse

level(AMFM)

= 200 mV (peak);

pulse

level(AMFM)

= 200 mV (peak);

pulse

level(AMFM)

= 20 mV (peak);

pulse

level(AMFM)

< 1.8 V

> 2.2 V

< 1.8 V

Noise detector output: pin TRDSMUTE

sink(AGC)

AM noiseblankerAGCsink

TRDSMUTE

= 3 V 35 50 65 µA

current

2003 Dec 19 20

6 7.5 10 µs

− 1000 − Hz

−− 100 Hz

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