AD9267BCPZ Analog Devices Inc, AD9267BCPZ Datasheet - Page 22

• Manufacturer Part Number: AD9267BCPZ
• Description: IC MOD SIGMA-DELTA DUAL 64LFCSP
• Manufacturer: Analog Devices Inc

Specifications of AD9267BCPZ

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 64-LFCSP
• Resolution (bits): 16bit
• Sampling Rate: 640MSPS
• Input Channel Type: Differential
• Data Interface: Serial, SPI
• Supply Voltage Range - Analog: 1.7V To 1.9V
• Supply Voltage Range - Digital: 1.7V To 1.9V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9267
Referring to Figure 46, the 3 dB cutoff frequency of the low-
pass Chebyshev II filter response resides at 15.75 MHz, and at
10 MHz, there is 0.43 dB of attenuation due to the sharp roll-off
of the filter. Table 15 summarizes the components and
manufacturers used to build the circuit.
Table 15. Chebyshev II Filter Components
Parameter
C1
L1
C2
C3
Value
39
180
390
220
Unit
pF
nH
pF
pF
Manufacturer
Murata GRM188 series, 0603
Coil Craft 0402AF, 2%
Murata GRM188 series, 0603
Murata GRM188 series, 0603
Rev. 0 | Page 22 of 24
In addition to matching the profile of Figure 44, group delay
and channel matching are important filter design criteria. Low
tolerance components are highly recommended for improved
channel matching, which translates to minimal degradation in
image rejection for quadrature systems.
–10
–12
–14
–16
–18
–20
–2
–4
–6
–8
0
0
2
Figure 46. Low-Pass Chebyshev II Filter Response
4
6
FREQUENCY (MHz)
8
10
12
14
16
18
20
40
30
20
10
0
–10
–20
–30
–40
–50
–60