MAX1820 WCDMA PA

3

BATTLX

OUT

SYNC

REF

GND

RF TRANSMIT SECTION

RF RECEIVE SECTION

VOUT CONTROLDAC

Li+ BATTERY 2.7V TO 4.2V

13MHz OR19.8MHz

SYSTEM CLOCK

BASEBANDPROCESSOR

FIXED-GAINLINEARPA

VOUT

4.7µF

4.7µH

DYNAMICSUPPLY0.4V TO

3.4V

1MHz PWM STEP-DOWN CONVERTER

MAX1820

2

2.5G 3G 3

ADC ABC ADC 6

13

1kV 17

32V 1921

FM 2223

2.5G 3G

3G

2G

2G

PA

3G

DC-DC PA

1

2

/

2G

3

WCDMA

3.4V

300mA 600mA

30mA 0.4V 1V

2040mW

12mW

3

1. M A X 1 8 2 0WCDMA PA

BATTLX

OUT

SYNC

REF

GND

RF TRANSMIT SECTION

RF RECEIVE SECTION

VOUT CONTROLDAC

Li+ BATTERY 2.7V TO 4.2V

13MHz OR19.8MHz

SYSTEM CLOCK

BASEBANDPROCESSOR

FIXED-GAINLINEARPA

VOUT

4.7µF

4.7µH

DYNAMICSUPPLY0.4V TO

3.4V

1MHz PWM STEP-DOWN CONVERTER

MAX1820

2. MAX1820

1000

10-10 5 15 25-5 0 10 20

100

BATT

ERY

CURR

ENT

(mA)

BATTERY CURRENT WITHAND WITHOUT MAX1820

TRANSMIT POWER (dBm)

PA CONNECTEDTO BATTERY

PA CONNECTEDTO MAX1820

SAVED BATTERY CURRENT

4

MAX1820 WCDMA

MAX1820

•

MAX1820

4 500mW 2040mW

MAX1820 0.15Ω PFET

97%

12mW 500mW MAX1820 0.2Ω NFET

3.3mA PWM

90% 90%

1MHz

3

FET

• 3.4V

0.4V –

DAC MAX1820 REF

DAC 3.4V

REF OUT 1.76

• 3 0 µs

WCDMA

666µs 1dB

10 ms

5

50µs

DAC

MAX1820

30µs

MAX1820

4.7µF

4.7µF

ESR

5mVp-p

MAX1820

30µs

MAX1820

3. WCDMA

0.4V/30mA 12mW 3.4V/600mA 2040mW

0

0.4

1.0

3.0

3.4

30 300 600WCDMA PA SUPPLY CURRENT (mA)

WCD

MA

PA S

UPPL

Y VO

LTAG

E (V

)

VOICE

DATA

4. MAX1820

1MHz

40

60

50

80

70

90

100

10

30

20

50

40

60

70

0 1000500 1500 2000

CONVERTER EFFICIENCY AND LOSSvs. LOAD

LOAD—PA SUPPLY POWER (mW)

CONV

ERTE

R EF

FICI

ENCY

(%)

CONV

ERTE

R PO

WER

LOS

S (m

W)

LOSS

EFFICIENCY

• 9.5% 100% PWM

(Li+)

4.2V

2.7V

MAX1820

PWM 4.2V

0.4V

9.5%

100%

MAX1820

PFET 0.15Ω0.1Ω

600mA 150mV

3.4V

/

• 1MHz MAX1820

1MHz PWM

PWM

MAX1820

1MHz ±20%

MAX1820 13 18

13MHz 19.8MHz

WCDMA

3G

5

5. MAX1820 666µs 1dB

WCDMA

MAX1820

30µs

500mV/div

400µs/div

<30µs RISE-TIMEAND SETTLING

ADC ABCADC

12 – ADC

12

ADC

ADC

ADC

ADC

EN

0 . 1 % 10

12

12

4LSB INL 12 ADC

10

0.5LSB INL

0.0122% 13

INL

2N N

0.075% 11 ADC

0.025%

– DAC PWM

1kHz

0˚C +70˚C 0˚C

+50˚C

ADC

DNL

DNL

LSB 1a 1b 1c 1d

INL DNL DNL

ADC

DNL ±1LSB

1a 1b 1c 1d

DNL DNL -0.5LSB 1b

-1LSB 1c

10

DNL ±1LSB ADC

-1LSB

1d -1.5LSB DNL

DNL -1LSB +2LSB

ADC DNL

-1LSB

DNL

[N]

[N+1] 1LSB

DNL 1LSB DNL

1LSB DNL

6

(1)Total error E E E ... E )12

22

32

N2 ( = + + + +

13

DNL ≤±4LSB

16 ADC 14 5

DNL≤ ±1LSB 16 ADC 15

ADC

INL DNL INL

12

±2LSB INL 2/4096 0.05%

ADC

2/3 1LSB

±1LSB INL 0.0244%

ADC 32.5% 0.5LSB

0 . 0 1 2 % A D C 1 6 %

0.0125%/0.075% INL

DNL

µC

DSP

2

x y

3a

ADC

7

1a. DNL

DNL =-0.8LSB

DNL =+1LSB

DIGITALCODE

ANALOG INPUT (V)

110

101

100

011

010

001

1b. DNL

DNL ERROR = -0.5LSB

DIGITALCODE

11

10

01

ANALOG INPUT (V)

1c. DNL 10

DNL ERROR = -1LSB

DIGITALCODE

11

10

01

ANALOG INPUT (V)

1d. DNL 10

DNL ERROR = -1.5LSB

DIGITALCODE

11

10

01

ANALOGINPUT (V)

AIN*

AT AIN THE DIGITAL CODE CAN BE ONE OF THREE POSSIBLE VALUES.

*

0V

3b

A

ADC 4

ADC

ADC

1. 2.5V +8mV 12 ADC

13LSB 8mV/[2.5V/4096]

12

13

2.5V 4083/4096

= 2.492V ADC

ADC

ADC

16 8mV 210LSB

VREF = 2.5V

2. -8mV

+8mV

ADC

5

8

2.

-FS ANALOG INPUT (VANALOG INPUT (V)+FS+FS ANALOG INPUT (V)+FS

+FS-FS

IDEAL ADC

+FS + OFFSET-FS + OFFSET

DIGITALCODE

NOTE: FS = FULL SCALE

IDEAL ADC ANALOGINPUT RANGE

INPUT RANGE FOR ADCWITH NEGATIVE OFFSET

Shifted ADC Transfer FunctionShifted ADC Transfer FunctionDue to Negative OffsetDue to Negative OffsetSHIFTED ADC TRANSFER FUNCTIONDUE TO NEGATIVE OFFSET

3a 3b.

2

1

A

INITIAL ADC TRANSFERFUNCTION (x, y AXES)

ADC TRANSFER FUNCTIONON x', y' AXES WITH GAINERROR CALIBRATED

IDEAL ADC (x, y AXES)

x

yy'

x'

INITIAL MEASUREDBIPOLAR ZERO ERROR

rANALOGINPUT (V)

DIGITALCODE

INITIAL ADCTRANSFERFUNCTION

1

A

ANALOG INPUT (V)

DIGITALCODE

BIPOLAR OFFSETERROR AFTER INITIAL GAIN

ADJUSTMENT

2

3

4

OFFSET CALIBRATED

GAIN CALIBRATED,INTRODUCING A SMALLOFFSET ERROR

OFFSET RECALIBRATED

IDEAL ADCTRANSFERFUNCTION

INITIALMEASURED

BIPOLARZERO ERROR

(a) (b)

ADC

ADC

y = m1/m2 x m1

m2

5

ADC

1 6

12 3FFh

1

ADC

4050 4096 12

46

4096

ADC

6

1

ADC

4LSB 12

ADC

9

4.

NOTE: FS = FULL SCALE

IDEAL ADC ANALOG INPUT RANGE

INPUT RANGE FOR ADC WITHNEGATIVE OFFSET

INPUT RANGE FOR ADC WITHPOSITIVE OFFSET

DIGITALCODE

ANALOG INPUT (V)ANALOG INPUT (V)ANALOG INPUT (V)+FS+FS+FS

UNUSED ANALOG INPUT RANGEDUE TO POSITIVE OFFSET ERROR

Unused Analog Input RangeUnused Analog Input RangeDue to Negative Offset ErrorDue to Negative Offset ErrorUNUSED ANALOG INPUT RANGEDUE TO NEGATIVE OFFSET ERROR

5.

b

FULL-SCALE ERROR

GAIN ERROR

IDEAL ADCy = (m1)x

y = (m2)x

ANALOG INPUT (V)

DIGITALCODE

MEASURED ADCy = m2x + b

OFFSETERROR

6.

NOTE: FS = FULL SCALE

UNUS

ED C

ODES

FOR

NEGA

TIVE

GAI

N ER

RORDIGITAL

CODE

UNUSED ANALOG INPUT RANGEFOR POSITIVE GAIN ERROR

ANALOG INPUT (V)

IDEAL ADC

NegativeGain ErrorNegativeNegativeGain ErrorGain Error

PositiveGain ErrorPositivePositiveGain ErrorGain Error

NEGATIVEGAIN ERROR

POSITIVEGAIN ERROR

+FS+FS-FS-FS +FS-FS

16

LSB

LSB

LSB

2/3LSBRMS

4LSBp-p 1LSBp-p

16

ADC

ADC

7 12

-40˚C +85˚C

4ppm/˚C ADC

10˚C 12 ADC

25ppm/˚C

8

RMS

–

RMS – 2.5V

500µV – 83µVRMS

0.02%

12

10

7. ADC

8 Bits

10 Bits

12 Bits

14 Bits

16 Bits

1 10 1000.1

10

1000

REFE

RENC

E ST

ABIL

ITY

(ppm

/°C)

TEMPERATURE EXCURSION (°C)

C E M

8. ADC

REF

AIN+AIN-

ADC

EXCITATIONVOLTAGE

VDD

LSB

ADC

ADC

ADC

IC

2.5V

0.55µV/µA

800µA

4 4 0 µV 0.0176%

440µV/2.5V 20%

ADC

X

10˚C

IC

0.8ppm/˚C

±10˚C ±8ppm

12 244ppm 1/4096 = 0.0244% =

244ppm ±8ppm

12 LSB

ADC

Nyquist

DNL INL

DNL

INL

– SNR

– SINAD THD

SFDR

SINAD SNR SINAD

RMS RMS Nyquist

9 SNR

SINAD SNR

SINAD SINAD SNR dB

ADC

SINAD = [6.02 (N) + 1.76] (dB) (2)

N 12

SINAD 74dB N

RMS

N = (SINAD - 1.76)/6.02 (3)

ENOB

11

SINAD Nyquist

SINAD

Nyquist

Nyquist

ENOB

ENOB

THD

SINAD 68dB

ENOB 11

1

12 0.05% INL

ENOB

SNR – SNR

SNR

SNR

3dB

SFDR FF T

RMS RMS

dB ADC

SFDR

ADC

ADC

SNR

SFDR

ADC

ADC

B MAX1241 1LSB

DNL 1LSB INL 0.0244% 3LSB

3/4096 = 0.0732% 4LSB

0.0977%

0.1953%

0.0244%

0.075%- 0.024% = 0.051%

5ppm /˚C 50˚C

0.025% 0.026%

12

1LSB

2.5V/4096 = 610µVp-p 102µVRMS

5ppm/˚C 30µVRMS MAX6166

ADC 30 µV

180µVp-p 12

LSB 11

LSB

MAX1241

0.25ppm/˚C 50˚C 12.5ppm

ADC

ADC

12

9. FFT ADC

FREQUENCY (kHz)0 10 20 30 40 50

AMPL

ITUD

E (d

B)

0

20

-20

-40

-60

-80

-100

-120

fTONETONE = 10ksps = 10kspsfSAMPLESAMPLE = 100ksps = 100kspsfTONE = 10kspsfSAMPLE = 100ksps

SFDR= -85dB

2nd Harmonic2nd Harmonic 3rd Harmonic3rd Harmonic2nd HARMONIC 3rd HARMONIC

FundamentalFundamentalFrequencyFrequencyFUNDAMENTALFREQUENCY

/

DAC

PC IC

DAC

PWM

DAC

PWM

IC MAX1669

MAX6650/MAX6651

MAX1669

DAC PWM MAX1669

IC

2N3904 1 MAX1669

MAX1669

2

3V 8V

MAX1669

PWM

IC

Rube Goldberg

IC

MAX1669

3

13

1. MAX1669

MAX1669

ADD1

ADD0

SYNCI/O1

ADD2

VCC

+12V

AGND PGND

N-CHANNELIRF7201

SYSTEM POWERGROUND

FAN

DXP

0.1µF

DXN

+5V

SMBCLK

SMBDATA

ALERT

2200pF

2N3906

10kΩ10kΩ10kΩ10kΩ

OVERT

38kΩ

38kΩ

100kΩ

I/O2

14

Maxim MAX6650 MAX6551

MAX6650/

MAX6651 IC

MAX6650/MAX6651

MAX6651

4 MAX6650 MAX6650

KTACH =

tTACH =

KSCALE = MAX6650/MAX6651

1 16 4

fCLK = MAX6650/MAX6651 254kHz typ

MAX6650/MAX6651

MAX6650/MAX6651

MAX6650/MAX6651

MAX6650/MAX6651

K K -TACH TACH SCALE CLKt= × ×

ƒ

1281

2.

0

20

10

40

30

60

50

70

90

80

100

0 32 4 51 6 7 8 11109 12APPLIED VOLTAGE (V)

FAN

SPEE

D (%

)

UNCERTAINSTARTUPREGION

3. MAX1669

Q1 2N3904

+12V

D11N914

C10.01µF

C20.1µF 10kΩ

R2390kΩ

R31MΩ

FROM FAN OUTPUT OFMAX1669 AS SHOWN

IN FIGURE 1

(1)

(2)

12V

240mA

120mA 0.72W

PD

TJMAX =

TA =

PD = 3

ØJ-A =

RØSA =

RØJC =

5

R0.6

IOUT =

LIMIT

RT T

P- RØSA

A

DØJC

JMAX≤−

T T

PØJMAX A

DJ - A

− ≤

P WD = 0 72 .6 x 0.120.5V x 0.5I ==

15

4. MAX6650

RPULLUP 10kΩ TYP

OUT8

4

5

1

3

2

9

10

6

5V OR 12V

7

FB

GND

SDA

SCL

ALERT #

VCC

TACHO

GPIO0

ADD

GND

VCC

SDA

SCL

GPIO1

SMBUS MASTER(MICROCONTROLLER

OR CPU)MAX6650

3V TO 5V

(3)

(4)

(5)

(6)

ILIMIT

0.6

–

-2.2mV/˚C

5.

RPULLUP 10kΩ TYP

ROUT SEE TEXT

QCL2N3904

5V OR 12V

16

17

IC 40V

IC

1

U1

U3

1000VDC U3

1000VDC UL 5000VRMS 1

8000VDC 10

LED

R1

U1

DESIGN SHOWCASE

1kV

1. VOUT = ISHUNT (4.80V/A) 1A

MAX4162U4

MAX4162U2

MAX4172U1

R23.32kΩ

SHUNT R1150mΩ

ISHUNT = ILOAD

R3100kΩ

12 8

46

533

7

4

6

C110pF

2

43

2 1

5 6

R5100kΩ

HIGH-VOLTAGE

LOAD

R4510Ω

Q12N3906U3

HCNR200

C210pF

3

7

2

4

6

OUTPUT

+

-

9VDC

UP TO 1000VDC

ISOLATION BARRIER

9VDC

18

10mA/V

R2

R2

U2 R2 Q1

LED LED

U4

2

R3 R5

U1

1.5mA

150mV

50µA R1

150mV

R2 1.5mA

R3

R5

50µA

R3 ≥ (VOUT_MAX)/(50 10-6)

R2

MAX4162

1pA

9V

R1 = 150mΩ R2 = 3.32kΩISHUNT = 1A

4.80V ISHUNT = 1.00A

VOUT = 4.84V 1%

2. 1

0

1

3

2

4

5

0 0.40.2 0.6 0.8 1.0

OUTPUT VOLTAGEvs. SHUNT CURRENT

SHUNT CURRENT (A)

OUTP

UT V

OLTA

GE (V

)

V

IR R2OUT

SHUNT ( . ) ( ) ( )= × ×0 01 1 (1)

(2)

19

IC MAX4172 32V

µMAX

MAX4172

100

IC

1

RSENSE Q1 10V

32V

6.5V

VIN VCC

S1

Q1 Q3 Q4b Q3 IC1 Q4b

VTHRESH = VCC - Vbe(Q4b)

VCC 2.7V 5.5V 5.0V Q4b

– V b e ( Q 4 b ) 0 . 7 V

VTHRESH 4.3V

1A

DESIGN SHOWCASE

32V

1.

MAX4172

NC

PG

MBT3904DWITI

VTHRESH

VCC = 5.0V

(DUAL)

Q4b

RLOAD

VOUT

GND

IC

Q4

RSENSE50mΩQ1

MTD20P06HDL

VIN10.0V TO 32.0V Q2

MMBT3906 Q3MMBTA63 ILOAD

RS-RS+

V+

OUT

R41.00MΩ

R3249kΩ

Q4a

RTHRESH10.0kΩ

ROUT10kΩ

0.1µF

IOUT

249kΩ

49.9kΩ

S1LOAD

CONNECT

R220.0kΩ

R120.0kΩ

NC 3

7

46

8

1 2

5

(1)

20

RSENSE RTHRESH ROUT

RSENSE = 50mΩ RTHRESH = 10.0kΩ

ROUT = VCC/ILOADRSENSEGm

ILOAD = 1A RSENSE = 50mΩGm IC1 0.010A/V

ROUT = 10.0kΩ

Q3 Q4b Q4b

VTHRESH Q3 IC1 RSENSE

IC1

ROUT VOUT

VOUT VTHRESH + Vbe(Q4a) Q4b

Q3 V+ IC1 8

V+ 2.67V PG

Q1

Q2

VCC

0.5mA

S1 S1

VCC

Q4a Q4b Vbe R4

1.0A

15%

(3)

(2)

21

MAX4636 SPDT

U1 1

S1

1 2 10

VCC

S2

5 7 6

U1 ESD

1V

MOSFET

20ns

4

NiCd NiMH

2.5Ω 5Ω 2

2.4V 3V 10Ω

U1 5.5V

30mA

U1 10

µMAX

SOT 23

DESIGN SHOWCASE

1.

GND

1

2

3

4

5

10

9

8

7

6

VCC VCC OUT

GND OUT

BATTERY1.5V TO 5.5V

U1

S2

S1

MAX4636

22

DESIGN SHOWCASE

FM

1. FM IC

MAX2606

FM ANTENNA

VCC 3V TO 5V

IC1

IND

VCC3V TO 5V

RIGHTRCA JACK

LEFTRCA JACK R4

22kΩ

R322kΩ

R210kΩ

R1100kΩ

270Ω

0.01µF

1µF

L1390nH

INPUT

0.47µF

10µF

1

1

1

2

2

2

2

2

3

3

61000pF

5

4

1kΩ

1kΩ

4.7kΩ

GND

TUNE

OUT+

VCC

OUT-

2200pF

FM 1

CD

IC1

L1 390nH

100MHz R1

88MHz 108MHz FM

50Ω -21dBm

FM 10dBm

R3 R4

R2 R2

RF

60mV

FM

75cm

IC

3V 5V

23

DRAM

LM78L05

5V DRAM 5V

5mA

DRAM

LDO

1

LDO

15µA

12V

5V

VIN VOUT

IC 350mV

– 0.7V IC1

PNP

1V

1. LDO

DESIGN SHOWCASE

SHDN IN

GND FB

OUT

5V

12V

100kΩ1%

300kΩ1%

0.1µF

0.1µF50V

FMMT618

4.7µF10V

MAX1616