AD8342ACPZ-WP Analog Devices Inc, AD8342ACPZ-WP Datasheet - Page 19

• Manufacturer Part Number: AD8342ACPZ-WP
• Manufacturer: Analog Devices Inc

Specifications of AD8342ACPZ-WP

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

The available frequency range of the AD8342 is extremely
broad. With adequate care, any of the mixer ports can be
optimized for extremely low frequencies, or up to several GHz.
The standard evaluation board is populated for broadband
performance from a few MHz to ~1GHz. The input match of
the RF port degrades at higher frequencies when using the
standard eval board. The broadband frequency range can be
extended by minimizing parasitics between the input
terminating resistor, R5, and the input pins.
The measurements in Figure 54 were made using the modified
evaluation board as configured in Figure 53.
NOTES
1. INPUT TERMINATION PLACED AS CLOSE AS POSSIBLE TO RFIN AND RFCM INPUTS.
VPOS
Figure 54. Input OIP3, IP1dB, Gain and NF vs. RF Frequency for a 190 MHz IF
RF IN
Figure 53. Modified Evaluation Board Schematic for Broadband
VPOS
30
25
20
15
10
0.1µF
1nF
5
0
500
0.1µF
0.1µF
1000pF
Down-Conversion Performance up to 3 GHz
1nF
100Ω
IP1dB
GAIN
OIP3
NF
1000
1000pF
1000pF
13
14
15
16
VPDC
VPLO
12
1
COMM
RFCM
RFIN
VPMX
Using a Low-Side LO.
RF FREQUENCY (MHz)
PWDN
LOCM
1500
11
2
AD8342
1nF
LO IN
EXRB
LOIN
10
3
1.82kΩ
100pF
1nF
COMM
COMM
IFOM
2000
IFOP
COMM
COMM
9
4
8
6
5
7
2500
100pF
TC2-1T
0.1µF
3000
IF OUT
(190MHz)
VPOS
Rev. B | Page 19 of 24
The broadband frequency capabilities of the AD8342 makes it
an attractive solution for a variety of applications, including
cellular, CATV, point-to-point radio links, and test equipment.
As an example, the circuit depicted in Figure 53 can easily be
applied as a feedback mixer in a predistortion receiver design.
The performance depicted in Figure 55 was measured using a
160 MHz IF. Here, four W-CDMA carriers with high PAR are
down-converted for IF sampling so that transmit path
nonlinearities can be measured and minimized using digital
predistortion techniques.
LOW FREQUENCY APPLICATIONS
The AD8342 can be used in extremely low frequency appli-
cations. Figure 56 depicts the configuration with necessary
modifications at IF ports. Two 10 Ω resistors are used to bias
the open collector outputs, and the output coupling capacitors
need to be large enough to allow intended low frequency
operation. Figure 57 illustrates the gain performance at fixed
IF of 10 kHz and 1 MHz for broadband down-conversion using
low-side LO.
Figure 55. ACPR Performance for Multiple W-CDMA Carriers Being Down-
–100
–110
–120
–30
–40
–50
–60
–70
–80
–90
Converted from 2140 MHz to 160 MHz for Distortion Analysis
STANDARD: W-CDMA 3GPP FWD
Tx CHANNELS
CH1 (REF)
CH2
CH3
CH4
TOTAL
CENTER 160MHz
REF –22.6dBm
POS –22.564dBm
–20.65dBm
–20.29dBm
–20.25dBm
–20.29dBm
–14.35dBm
ATT 5dB
4.06MHz
RBW 30kHz
VBW 300kHz
SWT 4s
ADJACENT CHANNE L
LOWER
UPPER
ALTERNATE CHANNEL
LOWER
UPPER
SPAN 40.6MHz
–61.36dB
–60.84dB
–61.94dB
–61.72dB
AD8342