Datasheet RF2690, RF2690PCBA Datasheet (RF Micro Devices)

7-39

7

QUADRATURE

DEMODULATORS

Preliminary

Product Description

Ordering Information

Typical Applications

Features

Functional Block Diagram

RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro,NC 27409, USA

Tel [phone]

Fax [phone]

http://www.rfmd.com

Optimum Technology Matching® Applied

Si BJT GaAs MESFETGaAs HBT
Si Bi-CMOS

ü

SiGe HBT

Si CMOS

7

GND

Gain

Control

Div

4

I/Q Cal

Mode Control

&Biasing

8

LO

4W-CDMA IN+

2NC

6

VCC

20

VGC21VGC1

17

IF+

14 I OUT+

15 ENCAL
16 FCLK

11 Q OUT-

19 VREF2V

10

EN RX

3NC

5W-CDMA IN-

9

EN WUP

12 Q OUT+

13 I OUT-

18

IF-

RF2690

W-CDMA RECEIVE AGC

AND DEMODULATOR

• W-CDMA Systems

The RF2690 is an integrated complete IF AGC amplifier
and quadrature demodulator designed for the receive
section of W-CDMA applications. It is designed to amplify
received IF signals, while providing 70dB of gain control
range, a total of 90dB gain, and demodulation to base­band I and Q signals. This circuit is designed as part of
RFMD’s single mode W-CDMA chipset, which includes
the RF9678 as modulator and IFAGCand theRF2638 as
upconvertor. The IC is manufactured on an advanced
25 GHz F

T

Silicon Bi-CMOS process, and is packaged in

a 20-pin, 4mmx 4mm, leadless chip carrier.

• Digitally Controlled Power Down Mode

• 2.7V to 3.3V Operation

• Digital LO Quadrature Divide-by-4

•IFAGCAmpwith70dBGainControl

• 80dB Maximum Voltage Gain

RF2690 W-CDMA Receive AGC and Demodulator
RF2690 PCBA Fully Assembled EvaluationBoard

7

Rev A4 010918

1.00

0.90

4.00
sq.

0.60

0.24 typ

3

0.20

0.75

0.50

0.23

0.13

4PLCS

0.50

2.10
sq.

0.65

0.30

4PLCS

0.05

12°

MAX

Dimensionsin mm.

Note orientation of package .

NOTES:

Package Warpage: 0.05 mm max.

4

Die Thickness Allowable: 0 .305 mm max.

5

Pin 1 identifier must existon top surface of package by identification
mark or feature on the package body. Exact shape and size is optional.

2

Shaded lead is Pin 1.

1

Dimension applies to p lated terminal: to be measured between 0.02 mm
and 0.25 mm from terminal end.

3

Package Style: LCC, 20-Pin, 4x4

Preliminary

7-40

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Absolute Maximum Ratings

Parameter Rating Unit

Supply Voltage -0.5 to +5 V

DC

Power Down Voltage(VPD) -0.5toVCC+0.7 V

DC

Input RF Power +3 dBm
Ambient Operating Temperature -40 to +85 °C
Storage Temperature -40 to +150 °C

Parameter

Specification

Unit Condition

Min. Typ. Max.

Overall Inputs and AGC

Temp=25°C, VCC=3V, Z

LOAD

=60kΩ diff.,

LO =760MHz@-10dBm, Z

SOURCE

=500Ω

diff.
IF Frequency 190 MHz
W-CDMA IF Input Impe dance 1200 Ω Single-ended

2400 Ω Balance. An external resistor across thedif-

ferential input is used to define the input

impedance.
LO Frequency 760 MHz
LO Input Level -20 -10 0 dBm
LO Input Impedance 50 Ω Single-ended.
Maximum Voltage Gain 76 81 dB Pin-to-Pin voltage gain.

Note: 10dB additional voltage gain in input

match 50Ω to 500Ω.
Minimum Voltage Gain 5 12 15
Gain Variation versus V

CC

and

Temperature

-3 +1+3dB

Gain Control Voltage 0.3 2.4 V Defined with external 10kΩ resistor in series

with V

GC1

pin. Analog gai n control.

Input IP3 Blockers at 10MHz and 20MHz offset.

-52 -48 dBm Maximum Gain. V

GC

=2.4V

-5 0 dBm Minimum Gain. V

GC

=0.3V

Noise Figure 5 dB Maximum Gain. V

GC

=2.4V

Inband Output 1dB Compression 1.5 2.0 V

P-P

Measured differentia lly.
Compression Out of band blocker causing 1dB of inband

gain compression. Blocker at 5MHz.

-48 dBm Maximum Gain. V

GC

=2.4V

-17 dBm Minimum Gain. V

GC

=0.3V

Butterworth thirdorder, F

C

2.5M+10%

Baseband 3dB Bandwidth 2.25 2.5 2.75 MHz

Calibrated. F

CLK

=13MHz

Sideband Suppression 27 dB A measure of IQ gain match and IQ quadra-

ture accuracy. Measured for baseband fre-

quencies 100kHz to 2.5MHz.
DC Offset +

40 mV

Baseband External Load 20 60 kΩ Resistive Load Impedance.

Differentially across pins.

5 pF Capacitive Load Impedance.

To ground.
Output DC Voltage V

CC

-1.3 VCC-1.6 VCC-1.9 V
IQ Amplitude Balance +0.2 +0.5 dB VGC=0.3V,PIN=-40dBm
IQ Phase Balance +

2+5 degree VGC=0.3V,PIN=-40dBm

Caution! ESD sensitive device.

RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).

Preliminary

7-41

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

1

Bondout option available for 15.36MHz, 18MHz and 19 MHz.

Parameter

Specification

Unit Condition

Min. Typ. Max.

Auto Calibration

F

CLK

Input Frequency

1

13 MHz

F

CLK

Signal Level 0.4 1.0 V

P-P

F

CLK

Pin Input Impedance 20 kΩ Single-ended.

Calibration Time 200 us
Current, Auto Cal. 1 mA Disabled after calibration.
Current, Once Auto Cal Finished 1 uA
CALEN TBD

DC Specifications

Supply Voltage 2.7 3.0 3.3 V
Current Consumption

Power Down <1 µA
W-CDMA Warm-up 5 mA
W-CDMA 8 mA

Logic Levels

V

EN

High Voltage 1.8 V

CC

V

V

EN

Low Voltage 0 0.5 V

Preliminary

7-42

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Auto Calibration Mode

The filters are automatically tuned when the ENCAL pin goeshigh. The filters are reset toa nominal value whenever the
ENCAL pin goes low. The auto calibration circuitry is independentof the EN WUP and the EN RX control pins.
The EN RX and ENCAL pins can be connected together if desired.

Mode Control Truth Table

Logic

Mode EN RX EN WUP
Power Down 0 X
W-CDMARX Warm-Up 1 0
W-CDMA RX 1 1

EN RX Chip Enable If EN RX=0, then entire IC i s powered down.
EN WUP Warm-up Enable If EN WUP=0, then IC is in warm-up mode.

Preliminary

7-43

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Pin Function Description Interface Schematic

1VGC1

Analog gain control. Validcontrol voltageranges are from 0.5V to 2.5 V.
These voltages are valid with a 10kΩ resistor in series with GC pin.

2NC

Unused. Connect to signal ground in application.

3NC

Unused. Connect to signal ground in application.

4W-CDMA

IN+

W-CDMA balanced input pin. This pin is internally DC-biased and
should be DC-blocked if connected to a device with a DC level present.
For single-ended input operation, one pin is used as an input and the
other W-CDMA input is AC coupled to ground. The balanced input
impedance is 2.4kΩ, while the single-ended input impedance is 1.2kΩ.

5W-CDMA

IN-

Same as pin 4, except complementary input. See pin 4.

6VCC

Supply

7GND

Connect to ground.

8LO

LO input pin. This input is internal ly DC-biased and should be DC­blocked if connected to a device with DC present. The frequency of the
signal applied to this pin is internally divided by a factor of four, hence
the LO applied should be four times the frequency of the IF.

9ENWUP

Warm-up mode enable. The input LO buffers and divider chains are
enabled. When logic “low” (<

0.5V), chip is in warm-up mode. When

logic “high” (VCC-0.3V), chip is in W-CDMA RX mode.

10 EN RX

Chip enable. Power down. When logic “low” (<0.5V), all circuits are
turned off. When logic “high” (VCC-0.3V), all circuits are operating.

11 Q OUT-

Complementary output to Q OUT+.

12 Q OUT+

Balanced baseband output of Q mixer. This pin is internally DC-biased
and should be DC-blocked externally. The output may be used single­ended by leaving one of the pins unconnected, however half of the out­put voltage will be lost.

13 I OUT-

Complementary output to I OUT+.

14 I OUT+

Balanced baseband output.

15 ENCAL

Calibration enable.

16 FCLK

F

CLK

clock reference for the automatic calibration circuitry.

17 IF-

Complementary output to IF+.

18 IF+

IF test point output. This balanced node is pinned out to allow for moni­toring of the AGC output signal as it enters the demodulat or. During
normal operation, this pin and its complementary output should be left
floating and not connected.

1200 Ω1200 Ω

W-CDMA IN+

BIAS BIAS

W-CDMA IN-

150 µA

QOUT-

QOUT+

V

CC

V

CC

150 µA

150 µA

IOUT-

IOUT+

150 µA

V

CC

V

CC

20 kΩ

Preliminary

7-44

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Pin Function Description Interface Schematic

19 VREF2V

2V voltage reference decouple (i.e., 10nF to ground).

20 VGC2

Gain control decouple (i.e., 10nF to ground).

Pkg

Base

Die

Flag

Ground.

Preliminary

7-45

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Application Notes

Voltage Gain Measurement Set-up

The evaluation board uses a unity voltage gain Op-Amp to simulate the 60kΩ differential load impedance condition for
thechip.The50Ω output impedance of Op-Amp makes the use of a 50Ω spectrum analyzer power measurement possi-
ble. The power gain measured will be considered as RAW Gain. The input impedance of the chip is 500Ω differential by
adding a parallel 680Ω resistor. The input transformer matches 50 Ω to 500Ω and results in 10dB difference between
voltage gain and power gain, hence, the voltage gain of the chip is RAW G ain minus 10dB. Because the input trans­former loss is 0.8dB, it needs to be added to the gain. Since the Op-Amp has the unity voltage gain, the voltage at the
evaluation board output is the same as the voltage at chip I or Q output. Therefore,the voltage gain of the chip with 60kΩ
load can be calculated by

Gv=RAW Gain-10+0.8(dB)

Input IP3 Measurement

The input IP3 measurement is based on a two tone inter-modulation test condition from the 3GPP standard, which spec­ifies two tones with offset frequencies at 10MHz and 20MHz. Due to the on-chip baseband filtering, the two tone output
is attenuated and cannot be seen. Since the only parameter observable is the IM3 product, the input IP3 then is calcu­lated by

IIP3=Pin+0.5*(P in+RAW Gain-IM3)

Noise Figure Measurement

The noise figure measurement is based on the noise figure definition NF=N

O-NI

-Gain, where NOis the output noise

density, N

I

is the input noise density (-174dBm/Hz when no input signal is applied) and Gain is the RAW Gain. The out-

put noise density N

O

is measured at 1MHz offset when no signal input is applied. The NF is calculated by NF=NO-

174 dBm/Hz-RAW Gain. Since the I and Q re-combination will provide 3dB extra for signal-to-noise ratio, the actual

noise figure is should be reduced by 3 dB. In addition, noise figure should be reduced by the input transformer loss of

0.8 d B. Therefore, the NF is calculated by
NF=N

O

+174-RAW Gain-3-0.8(dB)

1dB Gain Compression Point Voltage at Baseband Output

The device has a relativelyconstant1dB gain compression point versus V

GC

. Gain compression is tested with a CW sig-

nal with 60kΩ load differential.

How to Calculate the Power Gain of the Demodulator

In the system analysis for cascaded gain, noise and IP,it is often required to calculate the power gain of the demodulator
chip itself in matched load condition. Below is an example on how to determine this power gain value.

For this example, the load impedance is 60kΩ differential, the output AC impedance of the I or Q port is 500 Ω,themea­sured RAW Gain is 95dB.

First, the power gain from the input of the chip to the input of Op-Amp needs to be calculated. Since the voltage at the
50 Ω load and the voltage at Op-Amp input are the same, the difference of the power gain across the Op-Amp is the ratio
of load impedances. Hence, the power gain to the Op-Amp input is 95dB-10log(60000/50)=95-30=65dB.

Second, the power gain of the demodulator itself with matched load is calculated. The mismatch coefficient a is deter­mined by the mismatch coefficient equation

α 10

4R

SRL

RSRL+()

2

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

log 10

4 500 60000

⋅⋅

500 60000+()

2

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

log 15dB–== =

Preliminary

7-46

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Since the power gain to the input of the Op-Amp GP’=αGP, where GPis the power gain of demodulator for matched load.
Therefore, the demodulator power gain is 65+15=80dB.

AC Coupling in Evaluation Board

The output I and Q baseband signal is AC coupled for evaluation purposes only. T he high-pass corner frequency is at
1/(2π RC)=1/(6.28 *30kΩ*100nF)=56Hz.

I and Q Output DC Voltage and Its Offset

Although the I and Q output is AC coupled on the evaluation board, in most applications, it would be DC coupled to the
ADC input buffer. The DC voltage at the IC output is V

CC

-1.6V with a possible variation of ±0.3V due to temperature and

tolerance. The differential circuit asymmetry would cause common mode DC offset to the extent of ±40mV.

Baseband Filter Calibration Process

The BB (baseband) filter calibration process is same for both WCDMA and GSM/DCS. After calibration is done, the
WCDMA mode sets the circuitry to have a 3dB bandwidth of 2.5 M Hz, the GSM/DCS mode (if the chip has GSM/DCS
mode) sets the circuitry to have a 3dB bandwidth of 250kHz.

The BB filter in the I and Q path needs to be calculated every time after power down. When the FCLK pin is connected to
a signal generator with 0dBm output level at 13.0MHz, a logic high at CALEN pin for 200µs will calibrate the filter to have

2.5MHz bandwidth with 10% accuracy when WCDMA mode is set, or to 250kHz bandwidth with 10% accuracy when
GSM mode is set. The calibration is done when the chip is powered on only. Calibration is independent from all other
conditions,e.g. the chip enable could be off.

The calibration circuitry consumes 400µA. When the calibration sequence is complete after 200µs, the I

CC

drops to

0mA.
The 3dB bandwidth is defined to be from the reference level at 1MHz for WCDMA and at 50kHz for GSM/DCS. The 3dB

bandwidth is independent of V

GC

and VCC.

The filter can also be calibrated with different clock frequencies from 10MHz to 3 0MHz to tune the bandwidth over -40%
to +60% from its default 3dB bandwidth (2.5MHz for WCDMA and 250kHz for GSM). The 3dB bandwidth is linear with
clock frequency.

Preliminary

7-47

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Pin Out

19

VREF2V

18 17

IF-16FCLK

14

13

12

10

EN RX

98

LO

7

GND

5

4

3

2NC

1VGC1

* *

* *

20

VGC2VCC

6

11 Q OUT-

15 ENCAL

*

Represents "GND".

NC

W-CDMA IN+

W-CDMA IN-

EN WUP

QOUT+

IOUT-

IOUT+

IF+

Preliminary

7-48

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Applicatio n Schematic

1

3

6

4

5

2

7 8 9 10

1920 16

13

15

14

10 nF

10 kΩ

10 nF

VGC

100 nF

V

CC

IOUTN

EN RX

10 nF

1nF

IOUTP

18 17

12

11

10 nF

VREF 2V

10 pF

FCLK

ENCAL

100 nF

100 nF

QOUTN

QOUTP

100 nF

EN WUP

LO IN

2.4 kΩ Balanced

10 nF

W-CDMA

Preliminary

7-49

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Evaluation Board Schematic

(Download Bill of Materials from www.rfmd.com.)

Drawing 2690400 Rev-

19 18 17 16

14

13

12

10987

5

4

3

2

1

* *

* *

20

6

11

15

R1

10 kΩ

VGC

C2

5.1 pF

C4*
DNI

50 Ωµstrip

J2

WCDMA

C6

100 pF

R7

680 Ω

L2

150 nH

C10

10 nF

VCC ENWUP

C23*

DNI

C20

100 pF

C24*

DNI

50 Ωµstrip

J4

LO IN

ENRX TP7

QOUTN

TP6

QOUTP

TP5

IOUTN

TP4

IOUTP

R12*

DNI

C12

100 nF

R2

10 kΩ

C13

100 nF

R3

10 kΩ

R14

20 kΩ

32+

-

C14

100 nF

+5V

7

4

8

5

U2

R15

20 kΩ

6

CLC426

R18

51 Ω

50 Ωµstrip

J5

IOUT

C15

100 nF

-5V

R13*

DNI

C18

100 nF

R4

10 kΩ

C19

100 nF

R5

10 kΩ

R16

20 kΩ

32+

-

C16

100 nF

+5V

7

4

8

5

U3

R17

20 kΩ

6

CLC426

R19

51 Ω

50 Ωµstrip

J6

QOUT

C17

100 nF

-5V

ENCAL

C9

100 pF

C8

1nF

TP1

VREF2V

TP2

IFP

TP3

IFN

C11

10 pF

J3

FCLK

CON3

JP3

+5V

-5V

1
2
3

C21

1uF(16V)

+

C22

1 uF(16V)

+

HDR 8

8
7
6
5
4
3
2
1

JP1

ENRX
ENCAL
ENWUP

VCC

VGC

C7

1uF

+

R101MR91MR8

1M

Preliminary

7-50

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Evaluation Board Layout

Board Size 3.1” x 3.0”

Board Thickness 0.032”, Board Material FR-4

Preliminary

7-51

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Preliminary

7-52

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

NF versus V

GC

IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.0, VGC=2.4to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

0.3 0.7 1.1 1.5 1.9 2.3

Vgc (V)

NF (dB)

NF[dB]

VoltageGain versus VGC(Temp. +25oC, - 40oC, +85oC)

(IF Freq. 190MHz, LOFreq. 760MHz @ -10dBm,VCC=2.7V,VGC=2.4V to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.20.40.60.81.01.21.41.61.82.02.22.4

VGC(V)

Voltage Gain (dB)

Gain @2.7V,Temp.+25C
Gain @2.7V,Temp.- 40C
Gain @2.7V,Temp.+85C

Voltage Gain versus P

OUT

(1dB Compression)

(VCC=3.0V, VGC=2.4V,IF=191MHz, LO=760MHz @ -10dBm)

70.0

71.0

72.0

73.0

74.0

75.0

76.0

77.0

78.0

79.0

80.0

81.0

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

PowerOut (mV-peak)

Voltage Gain (dB)

Voltage Gain [dB]

W-CDMA Baseband Filter Response (Calibrated)

(IF=190MHz to 195MHz, LO=760MHz @ -10dBm, VCC=3.0V, VGC=2.4V)

-1.0

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

0.00.51.01.52.02.53.03.5

Frequency(MHz)

Amplitude (dBm)

PowerOut[dBm]

IGCversus V

GC

(IF Freq. 190MHz LO Freq. 760MHz VCC=3.0V Temp. 25oC)

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

I

GC

(uA)

Igc [uA]

Voltage Gain versus VGC(Temp. +25oC, - 40oC, +85oC)

(IFFreq.190MHz, LOFreq.760MHz @-10dBm,VCC=3.0V, VGC=2.4V to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

Voltage Gain (dB)

Gain @3.0V,Temp.+25C
Gain @3.0V,Temp.- 40C
Gain @3.0V,Temp.+85C

Preliminary

7-53

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

Voltage Gain versus VGC(Temp. -40oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V, 3.0V,2.7V,VGC=2.4V to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(VGC)

Voltage Gain (dB)

Gain @3.3V,Temp.- 40C
Gain @3.0V,Temp.- 40C
Gain @2.7V,Temp.- 40C

VoltageGain versus VGC(Temp.+25C, - 40C, +85oC)

IF Freq. 190MHz,LOFreq. 760MHz @ -10dBm, VCC=3.3V,VGC=2.4V to 0.3v)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

Voltage Gain (dB)

Gain @3.3V,Temp.25C
Gain @3.3V,Temp.-40C
Gain @3.3V,Temp.+85C

VoltageGain versus VGC(Temp. 25oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V, 3.0 V, 2.7V & VGC=2.4V to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.30.50.70.91.11.31.51.71.92.12.32.5

VGC(V)

Voltage Gain (dB)

Gain @3.3V,Temp.25C
Gain @3.0V,Temp.25C
Gain @2.7V,Temp.25C

VoltageGain versus VGC(Temp. +85oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V, 3.0V,2.7V,VGC=2.4V to 0.3V)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.20.40.60.81.01.21.41.61.82.02.22.4

VGC(V)

Voltage Gain (dB)

Gain @3.3V,Temp.+85C
Gain @3.0V,Temp.+85C
Gain @2.7V,Temp.+85C

IIP3 versus VGC(Temp. +25oC, - 40oC, +85oC)

(IF Freq.190MHz, LO Freq. 760MHz @ -10dBm, VCC=2.7V, VGC=2.4Vto 0.3V)

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

IIP3 (dBm)

IIP3 @2.7V,Temp.+25C
IIP3 @2.7V,Temp.-40C
IIP3 @2.7V,Temp.+85C

IIP3 versus VGC(Temp. +25oC, - 40oC, +85oC)

IFFreq. 190MHz, LOFreq.760MHz @ -10dBm,VCC=3.0V, VGC=2.4V to 0.3V)

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(VGC)

IIP3 (dBm)

IIP3@3.0V,Temp.25C
IIP3@3.0V,Temp.- 40C
IIP3@3.0V,Temp.+85C

Preliminary

7-54

RF2690

Rev A4 010918

7

QUADRATURE

DEMODULATORS

IIP3 versus VGC(Temp. +25oC, - 40oC, +85oC)

(

IFFreq.190MHz, LOFreq.760MHz @ -10dBm, VCC=3.3V, VGC=2.4V to 0.3V)

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

IIP3 (dBm)

IIP3 @3.3V,Temp.25C
IIP3 @3.3V,Temp.- 40C
IIP3 @3.3V,Temp. +85C

IIP3 versus VGC(Temp. 25oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V ,3.0V,2.7V,VGC=2.4V to 0.3V)

-50.0

-45.0

-40.0

-35.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

IIP3 (dBm)

IIP3@3.3V,Temp.25C
IIP3@3.0V,Temp.25C
IIP3@2.7V,Temp.25C

IIP3 versus VGC(Temp. +85oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V, 3.0V, 2.7V,V

GC

=

2.4V to

0.3V)

-50.0

-45.0

-40.0

-35.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

IIP3 (dBm)

IIP3 @3.3V,Temp. +85C
IIP3 @3.0V,Temp.+85C
IIP3 @2.7V,Temp. +85C

IIP3 versus VGC(Temp. -40oC)

(IF Freq. 190MHz, LO Freq. 760MHz @ -10dBm, VCC=3.3V, 3.0V,2.7V,VGC=2.4V to 0.3V)

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4

VGC(V)

IIP3 (dBm)

IIP3 @3.3V,Temp.-40C
IIP3 @3.0V,Temp.-40C
IIP3 @2.7V,Temp.-40C