AX5043-1 DVK2b Module Performance

APPLICATION NOTE AND9314/D
AX5043-1
DVK2b MODULE
PERFORMANCE TX
Revision 2
2
Table of Contents
1. Introduction................................................................................................ 3
2. DVK2b-AX5043-2 V1.3 868 MHz / NB Module ............................................. 4
2.1. Setup ........................................................................................................... 4
2.2. Output Power versus Power Setting and VDDIO ................................................. 4
2.3. Transmit Current versus Output Power ............................................................. 6
2.4. Output Power versus Frequency ...................................................................... 7
3. DVK2b-AX5043-2 V1.3 433 MHz / NB Module ............................................. 8
3.1. Setup ........................................................................................................... 8
3.2. Output Power versus Power Setting and VDDIO ................................................. 8
3.3. Transmit Current versus Output Power ............................................................ 10
3.4. Output Power versus Frequency ..................................................................... 11
4. DVK2-AX5043-LF2 V1.2 169 MHz / NB Module ......................................... 12
4.1. Setup .......................................................................................................... 12
4.2. Output Power versus Power Setting and VDDIO ................................................ 12
4.3. Transmit Current versus Output Power ............................................................ 14
4.4. Output Power versus Frequency ..................................................................... 15
www.onsemi.com
AND9314/D
Introduction
1.
Introduction
This application note documents output power and transmit currents versus frequency,
power settings and VDDIO for the following AX5043 modules: DVK2b-AX5043-2 V1.3
868 MHz / NB, DVK2b-AX5043-2 V1.3 433 MHz / NB and DVK2-AX5043-LF2 V1.2 169
MHz / NB.
www.onsemi.com
AND9314/D
3
DVK2b-AX5043-2 V1.3 868 MHz / NB Module
2.
DVK2b-AX5043-2 V1.3 868 MHz / NB Module
2.1. Setup
RF Module
DVK2b-AX5043-2 V1.3 868 MHz / NB with 16MHz TCXO unless stated otherwise.
Using the internal VCO.
Main Board
DVK2b, powering the AX5043 via an external power supply
Setup Software
AX-RadioLAB_v2.1f
Software Setup
Basic & Regulatory Tests, Set Pattern, 10kbps GFSK, BT= 0.5. Output Power is varied
by changing “Transmit Power” in the PHY panel, which determines the AX5043’s
TXPWRCOEFFB setting. Output power is plotted against TXPWRCOEFFB, rather than the
“transmit power” setting.
RF Measurement
equipment
Huber & Suhner 10dB attenuator directly at the RF Module, 0.5m Huber & Suhner RG58 cable to Rhode & Schwarz FSEB spectrum analyzer.
Measuring peak power with trace clear / write; RBW = 100kHz; detector AUTO SELECT,
AUTO PEAK; ATTEN AUTO NORMAL
Power levels are spectrum analyzer readings plus 11dB.
2.2. Output Power versus Power Setting and VDDIO
TXPWR 868 MHz
20
TXPWR [dBm] diff @1.8V
TXPWR [dBm] diff @ 3.0V
TXPWR [dBm] s.e. @1.8V
15
TXPWR [dBm] s.e. @ 3.0V
10
TXPWR [dBm]
4
5
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
-5
-10
TXPOWRCOEFFB (decimal)
Figure 1: Output power of the differential and single ended PA versus TXPWRCOEFFB register
setting at 868.3MHz, VDDIO = 1.8V and 3.0V.
www.onsemi.com
AND9314/D
DVK2b-AX5043-2 V1.3 868 MHz / NB Module
TXPWR
16
15
TXPWR [dBm]
14
13
12
11
10
TXPWR differential PA
9
8
1.50
TXPWR single ended PA
1.70
1.90
2.10
2.30
2.50
2.70
2.90
VDDIO [V]
Figure 2: Output power of the differential and single ended PA versus VDDIO for
TXPWRCOEFFB=0xFFF (maximum power) at 868.3MHz.
www.onsemi.com
AND9314/D
5
DVK2b-AX5043-2 V1.3 868 MHz / NB Module
2.3. Transmit Current versus Output Power
70
I_TX differential PA @ 1.8V
60
I_TX differential PA @ 3.0V
I_TX single ended PA @ 1.8V
50
I_TX [mA]
6
I_TX single ended PA @ 3.0V
40
30
20
10
0
-10
-5
0
5
10
15
20
TXPWR [dBm]
Figure 3: Transmit current versus output power of the differential and single ended PA at 868.3MHz
using a 16MHz TCXO. (TCXO current not included.) VDDIO = 1.8V and 3.0V.
Note: This module is optimised for maximum output power. With a matching
network optimised for 0dBm the transmit current at 0dBm is 8.5mA, rather than
12 – 15mA.
www.onsemi.com
AND9314/D
DVK2b-AX5043-2 V1.3 868 MHz / NB Module
18
90
16
80
14
70
12
60
10
50
8
40
6
30
4
20
2
10
0
800
820
840
860
880
900
920
940
960
980
I_TX [mA]
Output Power [dBm]
2.4. Output Power versus Frequency
pwr [dBm]
I_TX [mA]
0
1000 1020 1040
Frequency [MHz]
Figure 4 Output power and transmit current versus frequency for TXPWRCOEFFB = 0xFFF
(maximum power) using the differential PA and a 48MHz TCXO. (TCXO current not included.).
VDDIO = 3.0V.
www.onsemi.com
AND9314/D
7
DVK2b-AX5043-2 V1.3 433 MHz / NB Module
3.
DVK2b-AX5043-2 V1.3 433 MHz / NB Module
3.1. Setup
RF Module
DVK2b-AX5043-2 V1.3 433 MHz / NB with 16MHz TCXO unless stated otherwise.
Using the internal VCO.
Main Board
DVK2b, powering the AX5043 via an external power supply
Setup Software
AX-RadioLAB_v2.1f
Software Setup
Basic & Regulatory Tests, Set Pattern, 10kbps GFSK, BT= 0.5. Output Power is varied
by changing “Transmit Power” in the PHY panel, which determines the AX5043’s
TXPWRCOEFFB setting. Output power is plotted against TXPWRCOEFFB, rather than the
“transmit power” setting.
RF Measurement
equipment
Huber & Suhner 10dB attenuator directly at the RF Module, 0.5m Huber & Suhner RG58 cable to Rhode & Schwarz FSEB spectrum analyzer.
Measuring peak power with trace clear / write; RBW = 100kHz; detector AUTO SELECT,
AUTO PEAK; ATTEN AUTO NORMAL
Power levels are spectrum analyzer readings plus 10.75dB.
3.2. Output Power versus Power Setting and VDDIO
TXPWR 433 MHz
20
TXPWR [dBm] diff @1.8V
TXPWR [dBm] diff @ 3.0V
TXPWR [dBm] s.e @1.8V
15
TXPWR [dBm] s.e. @ 3.0V
10
TXPWR [dBm]
8
5
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
-5
-10
TXPOWRCOEFFB (decimal)
Figure 5: Output power of the differential and single ended PA versus TXPWRCOEFFB register
setting at 433.15MHz, VDDIO = 1.8V and 3.0V.
www.onsemi.com
AND9314/D
DVK2b-AX5043-2 V1.3 433 MHz / NB Module
TXPWR
16
TXPWR differential PA
TXPWR single ended PA
15
TXPWR [dBm]
14
13
12
11
10
1.50
1.70
1.90
2.10
2.30
2.50
2.70
2.90
VDDIO [V]
Figure 6: Output power of the differential and single ended PA versus VDDIO for
TXPWRCOEFFB=0xFFF (maximum power) at 433.15MHz.
www.onsemi.com
AND9314/D
9
DVK2b-AX5043-2 V1.3 433 MHz / NB Module
3.3. Transmit Current versus Output Power
70
I_TX differential PA @ 1.8V
60
I_TX differential PA @ 3.0V
I_TX single ended PA @ 1.8V
50
I_TX [mA]
10
I_TX single ended PA @ 3.0V
40
30
20
10
0
-10
-5
0
5
10
15
20
TXPWR [dBm]
Figure 7: Transmit current versus output power of the differential and single ended PA at
433.15MHz using a 16MHz TCXO. (The TCXO current is not included.)
Note: This module is optimised for maximum output power. With a matching
network optimised for 0dBm the transmit current at 0dBm is 8.5mA, rather than
12 – 15mA.
www.onsemi.com
AND9314/D
DVK2b-AX5043-2 V1.3 433 MHz / NB Module
18
90
16
80
14
70
12
60
10
50
8
40
6
30
4
20
2
10
0
400
410
420
430
440
450
460
470
480
490
500
510
I_TX [mA]
Output Power [dBm]
3.4. Output Power versus Frequency
pw r [dBm]
I_TX [mA]
0
520
frequency [MHz]
Figure 8 Output power and transmit current versus frequency for TXPWRCOEFFB = 0xFFF
(maximum power) using the differential PA and a 48MHz TCXO. (TCXO current not included.)
VDDIO = 3.0V.
www.onsemi.com
AND9314/D
11
DVK2-AX5043-LF2 V1.2 169 MHz / NB Module
4.
DVK2-AX5043-LF2 V1.2 169 MHz / NB Module
4.1. Setup
RF Module
DVK2-AX5043-LF2 V1.2 169 MHz / NB with 16MHz TCXO unless stated otherwise.
Using VCO2 with external L.
Main Board
DVK2b with connectors for DVK2 modules added, powering the AX5043 via an external
power supply
Setup Software
AX-RadioLAB_v2.1f
Software Setup
Basic & Regulatory Tests, Set Pattern, 10kbps GFSK, BT= 0.5. Output Power is varied
by changing “Transmit Power” in the PHY panel, which determines the AX5043’s
TXPWRCOEFFB setting. Output power is plotted against TXPWRCOEFFB, rather than the
“transmit power” setting.
RF Measurement
equipment
Huber & Suhner 10dB attenuator directly at the RF Module, 0.5m Huber & Suhner RG58 cable to Rhode & Schwarz FSEB spectrum analyzer.
Measuring peak power with trace clear / write; RBW = 100kHz; detector AUTO SELECT,
AUTO PEAK; ATTEN AUTO NORMAL
Power levels are spectrum analyzer readings plus 10.5dB.
4.2. Output Power versus Power Setting and VDDIO
TXPWR 169 MHz
20
TXPWR [dBm] diff @1.8V
TXPWR [dBm] diff @ 3.0V
TXPWR [dBm] s.e. @1.8V
15
TXPWR [dBm] s.e. @ 3.0V
10
TXPWR [dBm]
12
5
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
-5
-10
-15
TXPOWRCOEFFB (decimal)
Figure 9: Output power of the differential and single ended PA versus TXPWRCOEFFB register
setting at 169.3MHz, VDDIO = 1.8V and 3.0V.
www.onsemi.com
AND9314/D
DVK2-AX5043-LF2 V1.2 169 MHz / NB Module
TXPWR
16
TXPWR differential PA
TXPWR single ended PA
15
TXPWR [dBm]
14
13
12
11
10
1.50
1.70
1.90
2.10
2.30
2.50
2.70
2.90
VDDIO [V]
Figure 10: Output power of the differential and single ended PA versus VDDIO for
TXPWRCOEFFB=0xFFF (maximum power) at 169.3MHz.
www.onsemi.com
AND9314/D
13
DVK2-AX5043-LF2 V1.2 169 MHz / NB Module
4.3. Transmit Current versus Output Power
45
40
35
30
I_TX [mA]
14
I_TX differential PA @ 1.8V
I_TX differential PA @ 3.0V
I_TX single ended PA @ 1.8V
I_TX single ended PA @ 3.0V
25
20
15
10
5
0
-15
-10
-5
0
5
10
15
20
TXPWR [dBm ]
Figure 11: Transmit current versus output power of the differential and single ended PA at
169.3MHz using a 16MHz TCXO. (The TCXO current is not included.)
Note: This module is optimised for maximum output power. With a matching
network optimised for 0dBm the transmit current at 0dBm is 5mA, rather than
9-10mA.
www.onsemi.com
AND9314/D
DVK2-AX5043-LF2 V1.2 169 MHz / NB Module
18
45
16
40
14
35
12
30
10
25
8
20
6
15
4
10
2
5
0
156
158
160
162
164
166
168
170
172
I_TX [mA]
Output Power [dBm]
4.4. Output Power versus Frequency
pw r [dBm]
I_TX [mA]
0
174
frequency [MHz]
Figure 12 Output power and transmit current versus frequency for TXPWRCOEFFB = 0xFFF
(maximum power) using the differential PA and a 48MHz TCXO. (TCXO current not included.)
VDDIO = 3.0V.
www.onsemi.com
AND9314/D
15
Similar pages