Demoboard-T7031 - Atmel Corporation

Rev. 4564E–WLAN–07/04

Features

•Frequency Range 2.4 GHz to 2.5 GHz

•Supply Voltage 2.7 V to 3.6 V

•21 dBm Linear Output Power for IEEE 802.11b Mode

•3.5% EVM at 15.5 dBm Output Power for IEEE 802.11g Mode

•On-chip Power Detector with 20 dB Dynamic Range

•Power-down Mode and Biasing Control

•No External Components for Input Matching

•Low Profile Plastic Package QFN16 (4 ×4×0.9 mm)

Benefits

•IEEE 802.11b WLAN

•IEEE 802.11g OFDM WLAN

•PC Cards, PCMCIA

•2.4 GHz ISM Band Application

Electrostatic sensitive device.

Observe precautions for handling.

Description

Circuitry

The PA’s is designed for low current-consumption 802.11b and 802.11g multi-mode

applications such as Mini-PCI and PCMCIA for portable devices. The low profile

plastic package with internal input matching to 50 Ω minimizes the PCB board-space

and allows simplified integration with very few passive components. The on-chip

power-detector provides a voltage linear to the output power while the standby/bias

control logic provides power saving and shutdown as well as a linear adjustment of

output power. The PA is realized as a two stage PA with internal interstage-matching

and an open-collector output structure.

Process

The power amplifier is designed in Atmel's Silicon-Germanium (SiGe) process and

provides excellent linearity and noise performance, high gain as well as good power-

added efficiency.

2.4-GHz SiGe

Power Amplifier

for 802.11b/g

WLAN Systems

T7031

Preliminary

2T7031 [Preliminary]

4564E–WLAN–07/04

Figure 1. Block Diagram

V1_PA

PA_IN

Input

Matching

GND

V_DET_Out

VCC

GND

VCTRL

Interstage

Matching

V2_PA_Out

Standby/

biasing

control

Det.

141516

5678

V2_PA_Out

Interstage

Matching

V1_PA

SiGe PA

T7031

T7031 [Preliminary]

4564E–WLAN–07/04

Pin Configuration

Figure 2. Pinning QFN16

VCC

GND

VCTRL

INT_MATCH

GND

V_DET_OUT

INT_MATCH

V1_PA

PA_IN

IN_MATCH

V2_PA_Out

16 15 14 13

5 6 7 8

T7031

GND on the Paddel

Pin Description

Pin Symbol Function

1 VCC Supply voltage

2 GND Ground

3 VCTRL Power-up/biasing control voltage

4 INT_MATCH Interstage matching (must not be connected)

5 V2_PA_Out Power amplifier output and supply voltage for 2nd power amplifier stage

6 V2_PA_Out Power amplifier output and supply voltage for 2nd power amplifier stage

7 V2_PA_Out Power amplifier output and supply voltage for 2nd power amplifier stage

8 V2_PA_Out Power amplifier output and supply voltage for 2nd power amplifier stage

9 INT_MATCH Interstage matching (must not be connected)

10 V_DET_OUT Power detector output

11 GND Ground

12 NC Not connected

13 IN_MATCH Input matching (must not be connected)

14 PA_IN Power amplifier input

15 V1_PA Supply voltage for 1st power amplifier stage

16 V1_PA Supply voltage for 1st power amplifier stage

Slug – Ground

4T7031 [Preliminary]

4564E–WLAN–07/04

Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating

only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Parameters Symbol Value Unit

Supply voltage, no RF voltage applied VCC 6V

Supply current ICC 200 mA

Junction temperature Tj150 °C

Storage temperature TStg -40 to +125 °C

Input RF power PIN 12 dBm

Control voltage power up/down and biasing VCTRL 0 to 3 V

Note: The part may not survive all maximums applied simultaneously.

Thermal Resistance

Parameters Symbol Value Unit

Junction ambient RthJA 45 K/W

Operating Range

Parameters Symbol Value Unit

Supply voltage range VCC 2.7 to 3.6 V

Ambient temperature range Tamb -30 to +80 °C

Electrical Characteristics

No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

1.0 Supply voltage VCC 2.7 3.3 3.6 V A

1.1 Frequency Range f 2400 2500 MHz A

1.2 Control voltage range PA operating mode VCTRL 12VA

1.3 Power-down Mode VCTRL 0.2 V A

1.4 Current Consumption Quiescent ICQ 75 mA A

1.5 Power-down mode IPD 10 µA A

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

T7031 [Preliminary]

4564E–WLAN–07/04

Electrical Characteristics - Unmodulated Carrier

Test conditions (unless otherwise stated): VCC = 3.3 V, Frequency = 2.45 GHz, Tamb = 25°C

No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

2.0 Saturated output

power For reference PSAT 24 dBm A

2.1 P1dB output Power P1dB 23 dBm A

2.2 2nd harmonic

rejection

POUT = 18 dBm, with

external matching 2fOUT 30 dB A

2.3 Small signal gain ICQ, small signal

condition GL 22 dB A

2.4 Reverse isolation ICQ, small signal

condition ISOr 40 dB A

2.5 Input 50 Ω VSWR ICQ, small signal

condition VSWRin 2:1 C

2.6 Output 50 Ω VSWR

ICQ, small signal

condition, with

external matching

VSWRout 2:1 C

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

Electrical Characteristics - 11 Mbps CCK Modulation

Test conditions (unless otherwise stated): VCC = 3.3 V, Frequency = 2.45 GHz, Tamb = 25°C, IEEE 802.11b conform 11 Mbps CCK

modulation with gaussian transmit filtering

No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

3.0 Maximum linear

output power

ACPR1 ≥ 33 dBc

ACPR2 ≥ 55 dBc PLIN 21 dBm A

3.1 Linear power gain

POUT = PLIN

ACPR1 ≥ 33 dBc

ACPR2 ≥ 55 dBc

GL 22 dB A

3.2 Current Consumption

POUT = PLIN

ACPR1 ≥ 33 dBc

ACPR2 ≥ 55 dBc

ICC 130 mA A

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

Electrical Characteristics - 54 Mbps OFDM Modulation

Test conditions (unless otherwise stated): VCC = 3.3 V, Frequency = 2.45 GHz, Tamb = 25°C, IEEE 802.11g conform 54 Mbps OFDM

modulation, 0.7% EVM measurement equipment noise floor included in EVM measurement result.

No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

4.0 Error vector

magnitude POUT = 15.5 dBm EVM 3.5 % C

4.1 Linear power gain POUT = 15.5 dBm GL 22 dB A

4.2 Current consumption POUT = 15.5 dBm ICC 85 mA A

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

6T7031 [Preliminary]

4564E–WLAN–07/04

Typical Operating

Characteristics

Figure 3. Typical Gain and Current versus Control Voltage

Frequency = 2450 MHz, PIN = -40 dBm, VCC = 3.3 V

Figure 4. S-parameter, Magnitude

Power Detector

Test conditions (unless otherwise stated): VCC = 3.3 V, Frequency = 2.45 GHz, Tamb = 25°C

No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*

5.0 Detector voltage

range POUT = 2 to 22 dBm VDET 02VA

5.1 Settling time tSET 0.5 µs C

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

-20

-15

-10

-5

1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

VCTRL (V)

Gain (dB)

140

210

280

350

I (mA)

Gain

Iges

T7031 [Preliminary]

4564E–WLAN–07/04

Figure 5. S-parameters, Magnitude and Phase

Figure 6. Spectral Plot Conforming Compliance to 802.11b Spectral Mask

(3/5 db Margin) at POUT = 21 dBm, VCC = 3.3 V, VCTRL = 1.56 V

8T7031 [Preliminary]

4564E–WLAN–07/04

Figure 7. Frequency-sweep at PIN = -1.9 dBm, VCC = 3.3 V, VCTRL = 1.56 V

(ACPR Limit), CW-mode

Figure 8. VCTRL-sweep at Maximum Linear POUT (ACPR Limit), CW-mode,

Frequency = 2450 MHz, PIN = -1.9 dBm, VCC = 3.3 V

Figure 9. Error Vector Magnitude (EVM), Power Added Efficiency (PAE),

Gain versus POUT

2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500

Frequency (MHz)

OUT

(dBm), Voltage (V),

Gain (dB), PAE (%)

100

120

140

160

180

I (mA)

POUT

Iges

PAE

Gain

0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

VCTRL (V)

OUT

(dBm), Gain (dB), PAE (%)

120

180

240

300

360

I (mA)

PAE

Iges

Gain

POUT

0 5 10 15 20 25

POUT (dBm)

Gain (dB), PAE (%)

EVM (%)

PAE

GAIN

EVM

EVM limit 3.5%

T7031 [Preliminary]

4564E–WLAN–07/04

Figure 10. Frequency-sweep at EVM = 3.5% (EVM limit), CW-mode

IN = -6.3 dBm, VCC = 3.3 V, VCTRL = 1.56 V

Figure 11. VCTRL-sweep at EVM = 3.5% (EVM limit), CW-mode

Frequency = 2450 MHz, PIN = -6.3 dBm, VCC = 3.3 V

Figure 12. Power-sweep, CW-mode

Frequency = 2450 MHz, VCC = 3.3 V, VCTRL = 1.56 V

2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500

Frequency (MHz)

OUT

(dBm), Gain (dB), PAE (%)

100

120

I (mA)

POUT

PAE

Iges

Gain

-20

-15

-10

-5

0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

VCTRL (V)

OUT

(dBm), Gain (dB), PAE (%)

140

210

280

350

I (mA)

POUT

Gain

PAE Iges

-20 -15 -10 -5 0 5 10 15 20 25 30

POUT (dBm)

Gain (dB), PAE (%)

120

160

200

240

280

320

I (mA)

PAE

GAIN

Iges

10 T7031 [Preliminary]

4564E–WLAN–07/04

Figure 13. Power Detector Voltage versus POUT (Unmodulated Carrier), CW-Mode

Frequency = 2450 MHz, VCC = 3.3 V, VCTRL = 1.56 V

Figure 14. Power Detector Response Rising Edge

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

-20 -15 -10 -5 0 5 10 15 20 25 30

POUT (dBm)

Detector Voltage (V)

VDET

T7031 [Preliminary]

4564E–WLAN–07/04

Figure 15. Power Detector Response Falling Edge

Evaluation Board Schematic

Figure 16. Schematic of the Evaluation Board

11 10

1 2 3 4

Standby/

biasing

control

Det.

12 9

SiGe PA

T7031

VCTRL

C11

T2*C10

V2_PA

C12

C13

V_DET_Out

PA_Out

V1_PA

PA_IN

T3*

VCC

C14

T1*

* microstrip line

microstrip line length width

T1 3.0 mm 0.64 mm

T2 1.7 mm 0.64 mm

T3 2.4 mm 0.64 mm

metal layer distance to ground: 360 µm

CU metal layer thickness: 35 µm

12 T7031 [Preliminary]

4564E–WLAN–07/04

Evaluation Board Bill of Materials

Evaluation Board Layout

Figure 17. Layout of the Evaluation Board

Table 1. Bill of Materials of the Evaluation Board

Component Reference Value Size

Capacitor C14p7 0603

Capacitor C256p 0603

Capacitor C31n 0603

Capacitor C4(1) 1µ 0603

Capacitor C54p7 0603

Capacitor C6(1) 1n 0603

Capacitor C7(1) 1µ 0603

Capacitor C84p7 0603

Capacitor C9(1) 1n 0603

Capacitor C10 4p7 0603

Capacitor C11 2p2 0603

Capacitor C12 56p 0603

Capacitor C13 1n 0603

Capacitor C14(1) 1µ 0603

Inductor L122n 0603

Inductor L215n 0603

Note: 1. Can be omitted at optimum DC supply

T7031 [Preliminary]

4564E–WLAN–07/04

Evaluation Board Set-up Institutions

After connection of all cables (RF and DC):

•V

CC, V1, V2 = 3.3 V

• Increase VCTRL until 75 mA quiescent current without RF signal is reached

(~ 1.55 V)

• Increase input power until desired linear output power is reached

14 T7031 [Preliminary]

4564E–WLAN–07/04

Package Information

Ordering Information

Extended Type Number Package Remarks MOQ

T7031-PEP QFN16 - 4 x 4 Taped and reeled 1500 pcs.

T7031-PEQ QFN16 - 4 x 4 Taped and reeled 6000 pcs.

T7031-PEPM QFN16 - 4 x 4 Taped and reeled

Pb free, halogen free 1500 pcs.

T7031-PEQM QFN16 - 4 x 4 Taped and reeled

Pb free, halogen free 6000 pcs.

Demoboard-T7031 – Evaluation board 1

Printed on recycled paper.

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errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and

does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are

granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use

as critical components in life support devices or systems.

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4564E–WLAN–07/04

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