AD8341-EVAL Analog Devices Inc, AD8341-EVAL Datasheet - Page 16

• Manufacturer Part Number: AD8341-EVAL
• Manufacturer: Analog Devices Inc

Specifications of AD8341-EVAL

• Lead Free Status / Rohs Status: Not Compliant

AD8341
As the output power drops, the noise floor, measured in dBm in
1 MHz BW at 50 MHz carrier offset, drops slightly.
Figure 40 shows how output power, ACPR, and noise vary with
the differential I and Q control voltages. V
together and are varied from 0.5 V to 50 mV.
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–30
Single-Carrier WCDMA (Test Model 1-64 at 2140 MHz)
Figure 39. AD8341 ACPR and Noise vs. Output Power;
–25
NOISE –50MHz OFFSET
–20
OUTPUT POWER (dBm)
ACPR 10MHz OFFSET
–15
ACPR 5MHz OFFSET
–10
–5
BBI
and V
0
BBQ
are tied
5
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
–100
Rev. 0 | Page 16 of 20
In this case, adjacent channel power ratio remains constant as
the (noise dominated) alternate channel power degrades
roughly 1-for-1 with output power. As the I and Q control volt-
age drops, the noise floor again drops slowly.
–10
–15
–20
–25
–30
–35
–40
–45
–50
–5
0
0
Figure 40. AD8341 Output Power, ACPR and Noise vs. V
Single-Carrier WCDMA (Test Model 1-64 at 2140 MHz)
NOISE –50MHz OFFSET
0.1
OUTPUT POWER dBm
IQ CONTROL VOLTAGE
0.2
ACPR 10MHz OFFSET
ACPR 5MHz OFFSET
0.3
0.4
0.5
IQ
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
.