Intersil Corporation HFA3683A Datasheet

TM

HFA3683A

Data Sheet June 2000

2.4GHz RF/IF Converter and Synthesizer

The HFA3683A is a monolithic SiGe
half-duplex RF/IF transceiver designed
to operate in the 2.4GHz ISM band.
The receive chain featuresalownoise,

gain selectableamplifier (LNA) followed
by a down-converter mixer. An up-converter mixer and a
high performance preamplifier compose the transmit chain.
The remaining circuitry comprises a high frequency Phase
Locked Loop (PLL) synthesizer with a three wire
programmable interface for local oscillator applications.

A reduced filter count is realized by multiplexing the receive
and transmit IF paths and by sharing a common differential
matching network. Furthermore, both transmit and receive
RF amplifiers can be directly connected to mixers. The
inherent image rejection of both the transmit and receive
functions allow this economic advantage.

The HFA3683A is housed in a 64 lead TQFP package well
suited for PCMCIA board applications.

File Number 4634.5

Features

• Highly Integrated

• Multiplexed RX/TX IF Path Utilizes Single IF Filter

• Programmable Synthesizer

• Gain Selectable LNA

• Power Management/Standby Mode

• Single Supply 2.7V to 3.3V Operation

Cascaded LNA/Mixer (High Gain)

• Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25dB

• SSB Noise Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7dB

• Input IP3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -13dBm

• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz

Cascaded LNA/Mixer (Low Gain)

• Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-5dB

• Input P1dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5dBm

Ordering Information

PART

NUMBER

HFA3683AIN -40 to 85 64 Ld TQFP Q64.10x10
HFA3683AIN96 -40 to 85 Tape and Reel

TEMP. RANGE

(oC) PACKAGE PKG. NO.

Simplified Block Diagram

RX_MX_IN

RF_OUT

H/L

RX_IN

CP_DO

INTERFACE

REF_IN

TXA_OUT

PLL

MODULE

RX_MX_OUT

LO_IN

TX_MX_IN

• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz

Cascaded Mixer/Preamplifier

• Transmit Cascaded Mixer/Preamplifier Gain . . . . . . .25dB

• SSB Noise Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . .10dB

• Output P1dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4dBm

• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz

Applications

• IEEE802.11 1MBPS and 2MBPS Standard

• Systems Targeting IEEE802.11, 11MBPS Standard

• Wireless Local Area Networks

• PCMCIA Wireless Transceivers

• ISM Systems

• TDMA Packet Protocol Radios

TXA_IN

2-1

TX_MX_OUT

1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.

Pinout

HFA3683A

HFA3683A

(TQFP)

TOP VIEW

PTAT_RES

ITAT_RES1

REF_IN

PRE_VCC1

GND

GND

GND

SYN_VCC2

GND

RX_MX_IN

CP_D0

CP_VCC2

GND

TX_MX_IN+

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

LD

GND

RX_MX_OUT+

RX_MX_OUT­TX_MX_IN­GND
RX_LO_DRIVER_VCC1
GND
LO_VCC1
GND
LO_IN­LO_IN+
GND
TX_LO_DRIVER_VCC1
TX_MX_VCC1
TX_MX_VCC1
TX_MX_VCC1
TX_MX_OUT
TX_MX_VCC1

GND

LNA_VCC1

GND

RX_IN

GND

BIAS1_VCC1

GND

H/L
PE2
PE1

TX_VCC1

GND

TXA_OUT

GND
GND
GND

GND

COL_OUT

GND

RF_OUT

GND

ITAT_RES2

BIAS2_VCC1

6463 62 61 60 59 58 57 56 55 54 53 52 51 50 49

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

LE

GND

CLK

DAT A

REF_BY

GND

TXA_IN

TX_VCC1

Pin Description

PIN NAME DESCRIPTION

2 LNA_VCC1 Low Noise Amplifier Positive Power Supply.
4 RX_IN LowNoise Amplifier RF Input, internally DC coupled and requires an external blocking capacitor. A shunt capacitor to

ground matches the input for return loss and optimum NF.
6 BIAS1_VCC1 Bias Positive Power Supply for the LNA and Preamplifier.
8 H/L High or Low Gain Select, controls the LNA high and low gain modes.
9 PE2 This pin alongwith pinPE1 and bitM(0) ofPLL_PE determine which of variousoperational modes willbe active. Please

refer to the Power Enable Truth Table.

10 PE1 This pin alongwith pinPE2 and bitM(0) ofPLL_PE determine which of variousoperational modes willbe active. Please

refer to the Power Enable Truth Table.

11 TX_VCC1 Transmit Amplifier Positive Power Supply, requires a high quality decoupling capacitor and a short return path.
13 TXA_OUT Transmit Amplifier Output, internally matched to 50Ω, requires an external DC blocking capacitor.
17 TX_VCC1 Transmit Amplifier Positive Power Supply.
19 TXA_IN Transmit Amplifier Input, internally AC coupled.
21 LE Synthesizer Latch Enable, the serial interface is active when LE is low and the serial data is latched into defined

registers on the rising edge of LE.

22 DATA Synthesizer Serial Data Input, clocked in on the rising edge of the serial clock, MSB first.
23 CLK Synthesizer Clock, DATA is clocked in on the rising edge of the serial clock, MSB first.
24 REF_BY Synthesizer Reference Frequency Input Bypass, internally DC coupled and requires an external bypass to ground

when REF_INis used as a Single Ended input, alternatively,requires an external AC coupling capacitor when usedas

a differential input.

25 REF_IN Synthesizer Reference Frequency Input, internally DC coupled and requires an external AC coupling capacitor.

2-2

HFA3683A

Pin Description (Continued)

PIN NAME DESCRIPTION

27 SYN_VCC2 Synthesizer Positive Power Supply.
29 CP_VCC2 Synthesizer Charge Pump Positive Power Supply.
30 CP_DO Synthesizer Charge Pump Output, feeds the PLL loop filter.
32 LD Synthesizer Lock Detect Output.
33 TX_MX_VCC1 Transmit Mixer Positive Power Supply.
34 TX_MX_OUT Transmit Mixer RF output, internal AC coupled and internally matched to 50Ω.
35 TX_MX_VCC1 Transmit Mixer Positive Power Supply.
36 TX_MX_VCC1 Transmit Mixer Positive Power Supply.
37 TX_MX_VCC1 Transmit Mixer Positive Power Supply.
38 TX_LO_Driver_

VCC1

40 LO_IN+ Local Oscillator Positive Input, internally AC coupled, internally matched to 50Ω when the LO is driven single ended

41 LO_IN- Local Oscillator NegativeInput,internally ACcoupled, differential orsingle ended capability,ground externally forsingle

43 LO_VCC1 LO Buffer Positive Power Supply.
45 RX_LO_DRIVER

_VCC1

47 TX_MX_IN- Transmit Mixer NegativeInput, internallyDC coupled,high impedanceinput. Designedto sharea commonIF matching

48 RX_MX_OUT- Receive Mixer Negative Output, open collector, high impedance output. Designed to share a common IF matching

49 RX_MX_OUT+ Receive Mixer Positive Output, open collector, high impedance output. Designed to share a common IF matching

50 TX_MX_IN+ Transmit Mixer PositiveInput, internally DC coupled, high impedance input. Designed to share a common IF matching

52 RX_MX_IN Receive Mixer RF Input, internally DC coupled and requires external AC coupling as well as RF matching. The

54 PRE_VCC1 PLL Prescaler Positive Power Supply.
56 ITAT_RES1 Connection toexternalresistor setsthe receive andtransmitmixers tail currents,independent of AbsoluteTemperature.
57 PTAT_RES Connection to external resistorsets thereceive and transmitmixers tail currents, proportionalto Absolute Temperature.
58 BIAS2_VCC1 Bias Positive Power Supply for the receive and transmit mixers.
59 ITAT_RES2 Connection to external resistor sets the LNA and Preamplifier bias currents, independent of Absolute Temperature.
61 RF_OUT Low Noise Amplifier RF Output, internally AC coupled and internally matched to 50Ω.
63 COL_OUT LNA Collector Output,requires abypasscapacitance which isresonant with thePC boardparasitics.A small resistance

All

Others

GND Circuit Ground Pins (Quantity 23 each).

Transmit LO Driver Positive Power Supply.

and the LO_IN- is grounded.

ended operation.

Receiver LO Driver Positive Power Supply.

network/IF SAW filter with the receive mixer. Care should be exercised regarding the PC board layout to avoid

interference and noise pickup. Layout symmetry andmanagement of PC board parasiticsis also criticalfor maximizing

the bandwidth of the IF matching network.

network/IF SAW filter with the transmit mixer. Care should be exercised regarding the PC board layout to avoid

interference and noise pickup. Layout symmetry andmanagement of PC board parasiticsis also criticalfor maximizing

the bandwidth of the IF matching network.

network/IF SAW filter with the transmit mixer. Care should be exercised regarding the PC board layout to avoid

interference and noise pickup. Layout symmetry andmanagement of PC board parasiticsis also criticalfor maximizing

the bandwidth of the IF matching network.

network/IF SAW filter with the receive mixer. Care should be exercised regarding the PC board layout to avoid

interference and noise pickup. Layout symmetry andmanagement of PC board parasiticsis also criticalfor maximizing

the bandwidth of the IF matching network.

recommend network consists of a 3.3pF series capacitor followed by a small series inductance of 1.4nH and then a

1.2nH shunt inductor. The series inductance is best implemented on the PC board using a narrow transmission line

inductor.

(20Ω) in series with the main PC board VCC buss is recommended to provide isolation from other VCC bypass

capacitors. This ensures the image rejection performance of the LNA is maintained.

2-3

HFA3683A

Absolute Maximum Ratings Thermal Information

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6V

Voltage on Any Other Pin. . . . . . . . . . . . . . . . . . . -0.3 to VCC+0.3V

VCC to VCC Decouple . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V

Any GND to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V

Pins 4, 19, 52, 56, 57 and 59. . . . . . . . . . . . . . . . . . . . . 0.3 to +0.6V

Operating Conditions

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 85oC

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

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.

General Electrical Specifications

PARAMETER

Supply Voltage Full 2.7 - 3.3 V
Receive Total Supply Current (LNA in High Gain) 25 - 33 38 mA
Receive Total Supply Current (LNA in Low Gain) 25 - 27 32 mA
Transmit Total Supply Current 25 - 40 45 mA
Standby Total Supply Current (PLL and LO Buffers Active) 25 - 6 8 mA
TX/RX Power Down Supply Current Full - 10 100 µA
TX/RX/Power Down Time (Note 2) Full - 1 10 µs
RX/TX, TX/RX Switching Time (Note 2) Full - 0.2 1 µs
CMOS Low Level Input Voltage (CLK, DATA, LE) (Note 3) Full - - 0.3V
CMOS High Level Input Voltage (CLK, DATA, LE) (Note 3) Full 0.7V
CMOS High or Low Level Input Current (CLK, DATA, LE) Full -3.0 - +3.0 µA
Control Logic Low Level Input Voltage (H/L, PE1, PE2) (Note 4) Full -0.3 - 0.5 V
Control Logic High Level Input Voltage (H/L, PE1, PE2) (Notes 3 and 4) Full V

NOTES:

2. TX/RX/TX switching time and power Down/Up time are dependent on external components.
is thesupply voltage of external Control sources.

3. V

DD

4. These three pins H/L, PE1 and PE2 are not connected to CMOS circuitry and have different thresholds from all other control pins.

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

TQFP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

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

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

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

(TQFP - Lead Tips Only)

TEMP.

(oC) MIN TYP MAX UNITS

V

DD

DD-0.5

DD

- 3.6 V

--V

Cascaded LNA/Mixer AC Electrical Specifications Assumes a direct connection between the LNA and Mixer , IF = 374MHz,

LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise Specified

TEMP.

PARAMETER TEST CONDITIONS

RF Frequency Range Full 2400 - 2500 MHz
IF Frequency Range Full 280 374 600 MHz
LO Frequency Range Full 1800 - 2220 MHz
LO Input Drive Level Single End or Differential Full -10 -6 0 dBm
Power/Voltage Gain High Gain Mode Full 21.5 25 29 dB
Noise Figure SSB Full - 3.7 5.0 dB
Input IP3 Full -17.5 -11 - dBm
Input P1dB Full -27.5 -22 - dBm

2-4

(oC) MIN TYP MAX UNITS

HFA3683A

Cascaded LNA/Mixer AC Electrical Specifications Assumes a direct connection between the LNA and Mixer , IF = 374MHz,

LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise Specified (Continued)

TEMP.

PARAMETER TEST CONDITIONS

Power/Voltage Gain Low Gain Mode Full -9 -5 -1 dB
Noise Figure 25 - 25 - dB
Output IM3 at -4dBm Input Tones Full -42 -40.5 -40 dBc
Input P1dB Full -1 +2.5 - dBm
LNA Input 50Ω VSWR High Gain Mode 25 1.28 1.65:1 2.0:1 -

Low Gain Mode 25 1.1:1 1.3:1 2.0:1 ­LO 50Ω VSWR LO = Single End 25 1.4:1 1.4:1 2.0:1 ­Differential IF Output Load Shared with TX 25 - 200 - Ω
IF Output Capacitance (Single Ended) 25 - 1.2 - pF
IF Output Resistance (Single Ended) 25 - 5.5 - kΩ
LO to Mixer RF Feedthrough (Uncascaded) 25 - -50 -20 dBm
LO to LNA Input Feedthrough (Cascaded, no filter) 25 -69 -60 -50 dBm
Gain Switching Speed at Full Scale - High to Low ±1dB settling Full - 0.03 0.1 µs
Gain Switching Speed at Full Scale - Low to High ±1dB settling Full - 0.25 0.3 µs
Image Rejection With Matching Network 25 - 14 - dB

(oC) MIN TYP MAX UNITS

Cascaded Transmit Mixer AC Electrical Specifications Assumes a direct connection between the Mixer and Preamplifier,

F = 374MHz, LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise
Specified.

TEMP.

PARAMETER TEST CONDITIONS

RF Frequency Range Full 2400 - 2500 MHz
IF Frequency Range Full 280 374 600 MHz
LO Frequency Range Full 1800 - 2220 MHz
Power Conversion Gain 200Ω In, 50Ω Out Full 21 25 29 dB
SSB Noise Figure Full - 10 15 dB
Output IP3 Full +12 +14 +20 dBm
Output P1dB Full +2 +4 +9 dBm
LO Input Drive Level Same as RX Full -10 -6 0 dBm
LO to Transmit Mixer RF Feedthrough (Uncascaded) 25 - -37 -20 dBm
LO to Transmit Amp. Output Feedthrough

(Uncascaded)
LO to Transmit Amp. Output Feedthrough

(Cascaded, no filter)
Preamplifier Output 50Ω VSWR 25 - 2.3:1 3.0:1 ­LO 50Ω VSWR LO = Single End 25 - 1.4:1 2.0:1 ­Differential IF Input Load Shared with RX 25 - 200 - Ω
IF Input Capacitance (Single Ended) 25 - 1.1 - pF
IF Input Resistance (Single Ended) 25 - 0.7 - kΩ

o

(

C) MIN TYP MAX UNITS

25 - -45 -30 dBm

25 - -15 -5 dBm

2-5

HFA3683A

Phase Lock Loop Electrical Specifications (See Notes 5 through 13)

TEMP.

o

PARAMETER TEST CONDITIONS

Operating LO Frequency (32/33 Prescaler) Full 1800 - 2220 MHz
Operating LO Frequency (64/65 Prescaler) Full 1800 - 3500 MHz
Reference Oscillator Frequency Full - - 50 MHz
Selectable Prescaler Ratios (P) Full 32/33 - 64/65 ­Swallow Counter Divide Ratio (A Counter) Full 0 - 127 ­Programmable Counter Divide Ratio (B Counter) Full 3 - 2047 ­Reference Counter Divide Ratio (R Counter) Full 3 - 32767 ­Reference Oscillator Sensitivity,Single orDifferential

Sine Inputs
Reference Oscillator Sensitivity, CMOS Inputs,

Single Ended or Complimentary
Reference Oscillator Duty Cycle CMOS Inputs 25 40 - 60 %
Charge Pump Sink/Source Current/Tolerance 250µA Selection ±25% 25 0.18 0.25 0.32 mA
Charge Pump Sink/Source Current/Tolerance 500µA Selection ±25% 25 0.375 0.50 0.625 mA
Charge Pump Sink/Source Current/Tolerance 750µA Selection ±25% 25 0.56 0.75 0.94 mA
Charge Pump Sink/Source Current/Tolerance 1mA Selection ±25% 25 0.75 1.0 1.25 mA
Charge Pump Sink/Source Mismatch Full - - 15 %
Charge Pump Output Compliance Full 0.5 - V
Charge Pump Supply Voltage Full 2.7 - 3.6 V
Serial Interface Clock Width High Level t

Low Level t
Serial Interface Data/Clk Set-Up Time t
Serial Interface Data/Clk Hold Time t
Serial Interface Clk/LE Set-Up Time t
Serial Interface LE Pulse Width t

CS

CH

ES

EW

CWH

CWL

NOTES:

5. The Serial data is clocked on the Rising Edge of the serial clock, MSB first. The serial Interface is active when LE is LOW. The serial Data is
latched into defined registers on the rising edge of LE.

6. As longas poweris applied,all registersettings willremain stored,including the power down state. The system may then come in and out of the
power down state without requiring the registers to be rewritten.

7. CMOS Reference Oscillator input levels are given in the General Electrical Specification section.

C) MIN TYP MAX UNITS

(

Full 0.5 - V

CC

V

PP

Full - CMOS - Note 7

-0.5 V

CC2

Full 20 - - ns
Full 20 - - ns
Full 20 - - ns
Full 10 - - ns
Full 20 - - ns
Full 20 - - ns

POWER ENABLE TRUTH TABLE

PLL_PE

PE1 PE2

(SERIAL BUS) STATUS

0 0 1 Power Down State, Registers in Save Mode, Inactive PLL, Active

Serial Interface
1 1 1 Receive State, Active PLL
1 0 1 Transmit State, Active PLL
0 1 1 Inactive Transmit and Receive States, Active PLL, Active Serial

Interface
X X 0 Inactive PLL, Disabled PLL Registers, Active Serial Interface

NOTE:

8. PLL_PE is controlledvia the serialinterface, and can be used to disable the synthesizer. The actual synthesizer control is a logic AND function
of PLL_PE andthe resultof thelogic ORfunction of PE1 and PE2.PE1 andPE2 directlycontrol the power enable functionality of theLO buffers.

2-6