
AD8362
CHARACTERIZATION SETUP
EQUIPMENT
The general hardware configuration used for most of the
AD8362 characterization is shown in Figure 38. The signal
source used was a Rohde & Schwarz SMIQ03B. A 1:4 balun
transformer was used to transform the single-ended RF signal
to differential form. For the response measurements in Figure
30 and Figure 31, the configuration shown in Figure 39 was
used; for Figure 32 and Figure 33, the configuration shown in
Figure 40 was used; and for Figure 34, the configuration shown
in Figure 41 was used.
Rev. B | Page 14 of 36
AD8362
CHARACTERIZATION
BOARD
RFIN
3dB
VOUT
SMIQ03B
RF SOURCE
PC
CONTROLLER
MULTIMETER
HP34401A
0
Figure 38. Primary Characterization Setup
ANALYSIS
The slope and intercept are derived using the coefficients
of a linear regression performed on data collected in its
central operating range. Error is stated in two forms: error
from linear response to CW waveform and output delta
from 25°C performance.
The error from linear response to CW waveform is the
decibel difference in output from the ideal output defined by
the conversion gain and output reference. This is a measure of
the linearity of the device response to both CW and modulated
waveforms. The error in dB is calculated by
(
)
(
)
Slope
P
P
Slope
VOUT
Error
Z
IN
×
=
dB
where
P
Z
is the x intercept, expressed in dBm.
Error from the linear response to CW waveform is not a
measure of absolute accuracy since it is calculated using the
slope and intercept of each device. However, it verifies the
linearity and the effect of modulation on the device response.
Error from 25°C performance uses the performance of a given
device and waveform type as the reference; it is predominantly a
measurement of output variation with temperature.
TEK P5050
VOLTAGE PROBE
C1
C2
C3
C4
HPE3631A
POWER
SUPPLY
TEK TDS5104
SCOPE
SMT03
SIGNAL
GENERATOR
BALUN
3dB
COMM
CHPF
DECL
INHI
INLO
DECL
PWDN
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
AD8362
RF 50
0
Figure 39. Response Measurement Setup for Modulated Pulse
TEK P5050
VOLTAGE PROBE
C1
C2
C3
C4
HPE3631A
POWER
SUPPLY
TEK TDS5104
SCOPE
SMT03
SIGNAL
GENERATOR
BALUN
3dB
COMM
CHPF
DECL
INHI
INLO
DECL
PWDN
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
AD8362
HP8112A
PULSE
GENERATOR
RF 50
0
Figure 40. Response Measurement Setup for Power-Down Step
TEK P5050
VOLTAGE
PROBE
C1
C2
C3
C4
TEK TDS5104
SCOPE
SMT03
SIGNAL
GENERATOR
BALUN
3dB
COMM
CHPF
DECL
INHI
INLO
DECL
PWDN
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
AD8362
RF 50
HP8112A
PULSE
GENERATOR
732
0.01
μ
F
100pF
50
AD811
0
Figure 41. Response Measurement Setup for Gated Supply