Intersil Corporation HFA3665 Datasheet

PRELIMINARY

May 1999

TM

OBSOLETE PRODUCT

NO RECOMMENDED REPLA

Call Central Applications 1-800-442-7747

or email: centapp@Inter

CDMA/AMPS Downconverter with AGC Capability

CEMENT

sil.com

HFA3665

Features

• RF Frequency Range. . . . . . . . . . . . 869MHz to 895MHz

• IF Operation . . . . . . . . . . . . . . . . . . . . 10MHz to 100MHz

• LNA Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16dB

• LNA NF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3dB

• Mixer Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16dB

• Mixer NF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11dB

• Single Supply Battery Operation . . . . . . . . 2.7V to 3.3V

• Power Enable/Disable Control

• PIN Diode Attenuator DC Control

Applications

• IS95A CDMA/AMPS Dual Mode Handsets

• Wideband CDMA Handsets

• CDMA/TDMA Packet Protocol Radios

• Full Duplex Transceivers

• Portable Battery Powered Equipment

Pinout

Description

The HFA3665 is a monolithic bipo­lar downconverter for CDMA/AMPS
cellular applications. Manufactured

in the Intersil UHF1X process, the
device consists of a low noise cascode amplifier, a double
balanced downconversion mixer and a pair of linearized and
temperature compensated PIN diode biasing current
sources for external RF AGC applications. In addition, the
device offers two independent and selectable differential
mixer IF output ports to be used with dual mode IF filters and
requires low drive levels from the local oscillator. The
HFA3665 is one of the four chips in the PRISM™ chip set
and is housed in a small outline 28 lead SSOP package ide­ally suited for cellular handset applications.

Ordering Information

TEMP.

PART NUMBER

HFA3665IA -40 to 85 28 Ld SSOP M28.15
HFA3665IA96 -40 to 85 Tape and Reel

RANGE (oC) PACKAGE

PKG.

NO.

Block Diagram

HFA3665

(SSOP)

TOP VIEW

28

V

1

CC

GND

GND
GND

RX_PE
R_REF

2
3
4
5
6
7
8

9
10
11
12
13
14

AGC_CTRL

PIN_O_IBIAS1

LNA_OUT
LNA_OUT

LNA_IN

PIN_O_IBIAS2

PIN_I_GND

BIAS_GND

PRISM™ and the PRISM™ logo are trademarks of Intersil Corporation.

MIX_V
SEL

27

MIX_V

26
25

MIX_IND

24

RF_IN

23

RF_RET

22

MIX_GND
LO_RET

21
20

LO_IN
CDMA_OUT-

19

CDMA_OUT+

18
17

FM_OUT-

16

FM_OUT+
BIAS_V

15

CC

CC

CC

LNA_IN

PIN_O_IBIAS1

PIN_O_IBIAS2

LNA

AGC_CTRL

LNA_OUT

C
T
R
L

BIAS

RX_PE

RF_IN

LO_IN

SW

CDMA_OUT-

CDMA_OUT+

SEL

FM_OUT-

FM_OUT+

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright

© Intersil Corporation 1999

1

File Number 4301.5

HFA3665

Pin Descriptions

PIN NUMBER NAME DESCRIPTION

1V

2 AGC_CTRL AGC control current input pin. Requires a 9.53K 1% resistor for scale factor and tempera-

3 PIN_O_IBIAS1 Current output for a PIN diode bias control. Use a 2200pF filter capacitor to ground.

4 GND LNA bias ground return.
5, 6 LNA_OUT LNA open collector output. This pins are internally bonded to the same device output.
7, 8 GND LNA RF ground return. Degeneration (inductance) can be added to this pin.

9 LNA_IN LNA input.

10 PIN_O_IBIAS2 Second current output for PIN diode bias control. Use a 2200pF filter capacitor to ground.
11 PIN_I_GND PIN diode bias control ground return.
12 RX_PE Power enable control input. HIGH for normal operation. LOW for power down.
13 R_REF Bias setting resistor. 523Ω1% for optimum performance and parameter distribution.
14 BIAS_GND Reference circuit ground return.
15 BIAS_V
16 FM_OUT+ Positive IF FM output. Open collector PNP. Requires a DC return to ground.
17 FM_OUT- Negative IF FM output. Open collector PNP. Requires a DC return to ground.

CC

CC

LNA and PIN diode bias control Power Supply.Use high quality RF decoupling capacitors
at the pin.

ture compensation of the current sources.

Reference circuit PowerSupply.Use high quality RF decoupling capacitors right at the pin.

18 CDMA_OUT+ Positive IF CDMA output. Open collector PNP. Requires a DC return to ground.
19 CDMA_OUT- Negative IF CDMA output. Open collector PNP. Requires a DC return to ground.
20 LO_IN Mixer Local Oscillator input. Requires AC coupling and directly matches to 50Ω.
21 LO_RET Mixer Local Oscillator complementary input. Requires a bypass capacitor to ground as a

return reference.
22 MIX_GND Mixer ground return.
23 RF_RET MIxerRF portcomplementary input. Requires a bypass capacitor to ground as a return ref-

erence.
24 RF_IN Mixer RF input. Requires AC coupling and a match network to 50Ω.
25 MIX_IND Mixer common mode bias inductor. Use a RF choke to ground with high impedance at

900MHz. Low loss inductors with parallel resonance close to 900MHz are ideal.

26, 28 MIX_V

27 SEL Selects the CDMA or the FM output IF amplifier. HIGH selects the CDMA amplifier. LOW

CC

Mixer Power Supply Pins.Use high quality RF decoupling capacitors at each one of the

pins.

the FM amplifier output.

2

HFA3665

Absolute Maximum Ratings Thermal Information

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 3.6V

Voltage on Any Other Pin except 5 and 6 (6.0V) . -0.3 to VCC +0.3V

Operating Conditions

Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . .2.7V to 3.3V

Temperature Range . . . . . . . . . . . . . . . . . . . . . . -40oC ≤ TA≤ 85oC

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications

PARAMETER TEST CONDITION

LNA SPECIFICATIONS AT 885MHz, VCC = 3.0V,VLNA = 3.0V unless otherwise specified (Test schematics as in page 5)

RF Frequency Range Output Match net. B 25 869 - 895 MHz
Power Gain -30dBm input A 25 14 16.0 17.5 dB

Thermal Resistance (Typical, Note 1) θJA (oC/W)

SSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC

Maximum Temperature Range . . . . . . . . . . . . . . -40oC ≤ TA≤ 85oC

Maximum Storage Temperature Range . . . . . ..-65oC ≤ TA≤ 150oC

Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . 300oC

(Lead Tips Only)

(NOTE2)

TEST

LEVEL

TEMP

(oC) MIN TYP MAX UNITS

IP3I, Input referenced 3rd Order Intercept VLNA = 3.0V A 25 - +2 - dBm

VLNA = 3.6V A 25 - +6 - dBm

VLNA = 5.0V A 25 - +7.5 - dBm
IP1dB, Input Referenced Compression Point VLNA = 3.6V A 25 - -7 - dBm
Noise Figure B 25 - 2.3 - dB
Input VSWR A 25 - 2.2:1 2.5:1 ­Output VSWR Output network as in

the Apps. diagram

MIXER SPECIFICATIONS AT -3dBm LO at 970MHz AND IF of 85MHz

RF Frequency Range (Typical) B 25 869 - 895 MHz
IF Frequency Range B 25 10 85 100 MHz
LO Frequency Range (Typical) B 25 954 - 980 MHz
Power Conversion Gain Note 3 A 25 15.1 16.7 18.3 dB
Voltage Conversion Gain Differential IF output

load = 2.95K
Gain Flatness Across the RF Freq. Range B 25 - - 0.6 dB
Noise Figure, SSB Note 3 B 25 - 10.6 11.4 dB
IP3I, Input Referenced 3rd Order Intercept A 25 0 2.6 - dBm

A 25 - 1.6:1 2.0:1 -

B 25 - 34.4 - dB

IP1dB, Input Referenced Compression Point A 25 - -10 - dBm
LO Drive Level A 25 -6 -3 0 dBm
LO to IF Isolation A 25 - 30 ­LO to RF Isolation A 25 20 32 - dB
RF VSWR Inputnetwork asin the

Apps diagram

A 25 - 1.6:1 2:1 -

3