AD8362
CHARACTERIZATION SETUP
EQUIPMENT
TEK TDS5104
SCOPE
AD8362
TEK P5050
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
The general hardware configuration used for most of the AD8362
characterization is shown in Figure 40. The signal source is a
Rohde & Schwarz SMIQ03B. A 1:4 balun transformer is used to
transform the single-ended RF signal to differential form. For
frequencies above 3.0 GHz, an Agilent 8521A signal source
was used. For the response measurements in Figure 32 and
Figure 33, the configuration shown in Figure 41 is used. For
Figure 34 and Figure 35, the configuration shown in Figure 42
is used. For Figure 36, the configuration shown in Figure 43 is
used.
VOLTAGE PROBE
CHPF
DECL
INHI
C1
HPE3631A
POWER
SUPPLY
SMT03
SIGNAL
BALUN
C2
3dB
INLO
GENERATOR
DECL
PWDN
COMM
C3
RF 50Ω
C4
AD8362
CHARACTERIZATION
BOARD
Figure 41. Response Measurement Setup for Modulated Pulse
SMIQ03B
RF SOURCE
MULTIMETER
HP34401A
3dB
RFIN
VOUT
TEK TDS5104
AD8362
SCOPE
TEK P5050
COMM
CHPF
DECL
INHI
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
VOLTAGE PROBE
C1
PC
CONTROLLER
HPE3631A
POWER
SUPPLY
SMT03
SIGNAL
GENERATOR
BALUN
C2
3dB
Figure 40. Primary Characterization Setup
INLO
ANALYSIS
DECL
PWDN
COMM
RF 50Ω
C3
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 the
linear response to the CW waveform and output delta from
25°C performance.
HP8112A
PULSE
GENERATOR
C4
Figure 42. Response Measurement Setup for Power-Down Step
The error from linear response to the 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
HP8112A
AD811
732Ω
PULSE
GENERATOR
50Ω
VOUT − Slope ×
P
− PZ
IN
Error
(
dB
)
=
(1)
AD8362
TEK TDS5104
SCOPE
Slope
COMM
ACOM
VREF
VTGT
VPOS
VOUT
VSET
ACOM
CLPF
where PZ is the x intercept, expressed in dBm.
CHPF
DECL
INHI
TEK P5050
VOLTAGE
PROBE
C1
Error from the linear response to the CW waveform is not a
measure of absolute accuracy because it is calculated using
0.01µF
100pF
the slope and intercept of each device. However, it verifies the
linearity and the effect of modulation on the device response.
Error from the 25°C performance uses the performance of a
given device and waveform type as the reference; it is predomi-
nantly a measurement of output variation with temperature.
BALUN
C2
3dB
INLO
DECL
PWDN
COMM
C3
SMT03
SIGNAL
GENERATOR
C4
RF 50Ω
Figure 43. Response Measurement Setup for Gated Supply
Rev. D | Page 15 of 32
ADI [ ADI ]
