AD8362
CHARACTERIZATION SETUP
EQUIPMENT
TEK TDS5104
SCOPE
AD8362
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.
TEK P5050
VOLTAGE PROBE
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
CHPF
DECL
INHI
C1
HPE3631A
POWER
SUPPLY
SMT03
SIGNAL
GENERATOR
BALUN
C2
3dB
INLO
DECL
PWDN
COMM
C3
RF 50Ω
C4
AD8362
CHARACTERIZATION
BOARD
SMIQ03B
RF SOURCE
MULTIMETER
HP34401A
3dB
RFIN
VOUT
Figure 39. Response Measurement Setup for Modulated Pulse
TEK TDS5104
AD8362
SCOPE
TEK P5050
VOLTAGE PROBE
COMM
CHPF
DECL
INHI
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
PC
CONTROLLER
C1
Figure 38. Primary Characterization Setup
HPE3631A
POWER
SUPPLY
SMT03
SIGNAL
BALUN
C2
3dB
ANALYSIS
GENERATOR
INLO
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.
DECL
PWDN
COMM
RF 50Ω
C3
HP8112A
PULSE
GENERATOR
C4
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
Figure 40. Response Measurement Setup for Power-Down Step
HP8112A
PULSE
AD811
GENERATOR
50Ω
732Ω
VOUT − Slope ×
PIN − PZ
Error dB =
( )
Slope
AD8362
TEK TDS5104
SCOPE
where PZ is the x intercept, expressed in dBm.
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
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.
CHPF
DECL
INHI
TEK P5050
VOLTAGE
PROBE
C1
0.01µF
100pF
BALUN
C2
3dB
INLO
DECL
PWDN
COMM
C3
SMT03
SIGNAL
GENERATOR
C4
RF 50Ω
Figure 41. Response Measurement Setup for Gated Supply
Rev. B | Page 14 of 36
ADI [ ADI ]
