C2304 [ETC]

MMDS / ISM / S-Band Downconverter; MMDS / ISM / S波段下变频器


型号：	C2304
厂家：	ETC
描述：	MMDS / ISM / S-Band Downconverter MMDS / ISM / S波段下变频器 ISM频段
文件：	总4页 (文件大小：81K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Pacific Wireless

2844 Mar Vista Dr. Suite 101

Aptos, CA 95003

TEL (831) 684-2474

C2304..

DATA SHEET

FAX (831) 684-2494

www.pacwireless.com

MMDS / ISM / S-Band Downconverter

1800 to 4800 MHz Operation

RF IN

VDD

LO IN

Features

· 1800 to 4800 MHz RF

· 10 to 900 MHz IF

· 26 dB Gain, 4dB Noise Figure

· Single 5V Supply

IF OUT

· 27 dBm Output IP3

· Separate RF AMP, MIXER/LO AMP and IF AMP cells.

· 75 ohm IF output impedance

IF/RF

IF IN

IF BIAS

RF OUT

Applications

· 2.4 GHz ISM Band Applications

· MMDS Downconverters

· Wireless Bridges

· Wireless LANS and WANS

· Point to Multipoint Receivers

· 2.4GHz Consumer Applications

· Bluetooth Applications

· Upconverters

· Wireless Local Loop Systems

· S Band Receivers

Description

The C2304 is a flexible high intercept and high gain down conversion GaAs MMIC packaged in a compact 14

pin SOIC package. Each sub-circuit is brought out on separate pins to allow for custom filtering on the IF/RF

mixer interstage or custom matching for specific bands. Broadband parallel feedback networks are used on the

gain and LO driver stages and the mixer is a singly balanced, two diode type mixer. The FET source of the IF

amplifier stage (IF BIAS) is accessible for AC bypassing which allows for current reduction with DC source

degeneration. The gain and DC current is broken up as follows: RF AMP gain = 14dB, current = 22 mA; LO

AMP gain = 11dB, current = 28ma; IF AMP gain = 18dB, current = 60 mA, MIXER conversion loss = -6dB.

Simple external matching circuits can be implemented for all ports to achieve VSWR’s <2:1 over moderate

bandwidths of less than 400MHz.

Electrical Characteristics

Typical Specifications for V_DD=5.0V T_A=+25^oC

Minimum and Maximum specifications are guaranteed over RF range 2.5GHz – 2.68GHz

Tested in 50W input / 75W output system, LO=2.278GHz at 5dBm, using matching circuit shown on page 3.

Parameter

Conversion Gain

Symbol

Conditions

LO=5dBm

Min

24.7

Typ

Max

27.3

Units

Single Sideband Noise Figure

Output IP3

RF Input Return Loss

IF Output Return Loss

IP3

S₁₁

S₂₂

LO=2.278GHz

LO=5dBm

50W input ref.

75W output ref.

-12

-11

dBm

Page 2

LO Input Return Loss

C2304

S₁₁

P_1dB

I_DD

ISO_r-i

ISO_l-i

ISO_l-r

VSWR

50W input ref.

LO=5dBm

-2

110

dBm

Output Power at 1dB Comp.

Operating Drain Current

RF OUT to IF/RF Isolation

LO IN to IF OUT Isolation

LO IN to RF IN Isolation

Load VSWR for Input/Output

Stability¹

LO=5dBm

With network on page 3

10:1

Thermal Resistance

q_JC

Junction to GND lead

°C/W

¹As a separate circuit the IF AMP is conditionally stable for VSWR < 5:1 over 1.5-3.6GHz

Typical Performance Characteristics

(Obtained using external circuit shown on p. 3)

Conversion Gain vs. Temperature

LO = 2.278GHz @ 5dBm

Conversion Gain and Output IP3 vs. LO Power

F1=2.59 GHz and F2=2.596 GHz

+25C

+85C

-40C

IP3

Conv. gain

-6

-4

-2

2.45

2.5

2.55

2.6

2.65

2.7

LO Power (dBm)

RF Freq (GHz)

IF Output Return Loss in 75 ohms

LO = 5dBm

RF Input Return Loss and RFOUT to IF/RF Isolation

-5

-10

-15

-20

-25

-30

-35

RF Input Return loss

RFout to RF/IF Isolation

-10

-15

-20

-25

200

220 240

260 280

300 320

Freq (MHz)

340 360

380 400

420

2.5

2.55

2.6

2.65

2.7

Freq (GHz)

Absolute Maximum Ratings

Characteristic

Symbol

Value

Units

Drain Voltage

V_DD1,2

Bias Current

RF Input Power

I_DS

P_IN

P_DISS

VSWR

T_OP

200

+18

1.0

dBm

Power Dissipation

Load VSWR

Operating Temperature

Junction Temperature

Storage Temperature Range

10:1

-40 to +85

150

-65 to +150

°C

T_J

T_STG

Caution: Operating beyond specified rating for any of these parameters may cause permanent damage to the device.

Specifications Subject to Change Without Notice

C2304Spec

Rev 6 12/30/99

Page 3

C2304

Application Information

Part

Value/Type

33pF NPO

1pF NPO

Size

0603

VDD

IF AMP

+5V

IF OUT

C4,C9

TRL1

TRL2

TRL3

0.5pF NPO

0.1uF X7R

1.8pF NPO

270 pF NPO

1000pF X7R

39 nH

0603

0805

1008

@2.5GHz

LO IN

TRL2

RFIN

560 nH

TRL3

TRL1

q = 30°, Z₀=110W

q = 23°, Z₀=110W

q = 28°, Z₀=110W

VDD

+5V

Matching/Diplexing Circuit for 2.5 to 2.68 GHz Operation.

Recommended LO IN Port Matching

The LO IN port of the C2304 can be matched into 50 ohms with a lossy network. At 3dBm drive, the

unmatched port is at Z = 5 –15j ohms at 2.278 GHz. Also of note is that this impedance varies somewhat with

the LO drive level. Therefore a narrow band high Q network is not recommended due to inherent

manufacturing variation in LO drive available. The simple network below matches this port over an ~ 10%

bandwidth.

TRL 1

Part

Value/Type

1.8pF NPO

4.3 W

Size

0603

LO Source

50 ohm

LO IN

Pin 2

TRL1

q = 21°, Z₀=110W

@2.5GHz

Test Board Layout

Biasing and Electrical Ground/

Thermal Considerations

LO IN

RF IN

Pins 3,4,5,10 and 12 should have ground vias straddling

both sides of the pin solder contact. This insures good

electrical and thermal grounding. If the IF AMP is run at

I_dss(DC Grounded IF BIAS pin 14), this pin should be

grounded as described above. It is recommended that a

continuous ground plane be present under the package

to lower pin impedance and maintain similarity with the

matching environment used in the schematic in the

Application Information section. Bias for the IF amplifier

is supplied thru IF OUT pin 14. All ports are DC coupled

to the IC. Pins 2,6 and 13 should be kept at 0V DC to

maintain proper gate voltages. Pin 9 is internally biased

at 5V under normal operation and requires an external DC

block.

VDD

IF AMP

VDD

C 2 3 0 X

Material : GETEK

.028”

Specifications Subject to Change Without Notice

C2304Spec

Rev 6 12/30/99

IF OUT

Page 4

C2304

Package Specifications

Pin Number

Function

IF OUT

LO IN

GND

RF IN

VDD

GND

RFOUT

GND

IF/RF

GND

IF IN

IF BIAS

Advantages of GaAs MMIC

Notes:

Standard packaging is 14L SOIC tube. Tape and Reel available

upon request.

RF Integration ˘ Less Components/Board Space

Good Device Matching ˘ No Tweaks ˘ Less Tuning

Great power efficiency at low voltage

Better Linearity and Distortion Performance

Superb Radiation Immunity

All shipments F.O.B. Pacific Wireless Aptos, CA 95003

No Latent or Cummulative ESD effects

No Infant Mortality; No ˆWalking Wounded˜

No Burn−in Necessary

Part Numbers:

Part Number

Description

1800 to 4800 Downconverter – Tube

C2304

1800 to 4800 Downconverter – Tape and Reel

C2304TR

For further information contact:

Pacific Wireless

2844 Mar Vista Dr. Suite 101

Aptos, CA 95003

TEL (831) 684-2474

FAX (831) 684-2494

www.pacwireless.com

Specifications Subject to Change Without Notice

C2304Spec

Rev 6 12/30/99

C2304 [ETC]

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