DAC1205D650HW/C1 NXP [NXP Semiconductors], DAC1205D650HW/C1 Datasheet - Page 25

• Manufacturer Part Number: DAC1205D650HW/C1
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
DAC1205D650_1
Product data sheet
10.6 FIR filters
The DAC1205D650 integrates three selectable Finite Impulse Response (FIR) filters
which enable the device to use interpolation rates of 2 , 4 or 8 .
All three interpolation filters have a stop-band attenuation of at least 80 dBc and a
pass-band ripple of less than 0.0005 dB.
The coefficients of the interpolation filters are given in
coefficients”.
Table 33.
[1]
First interpolation filter
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
H(9)
H(10)
H(11)
H(12)
H(13)
H(14)
H(15)
H(16)
H(17)
H(18)
H(19)
H(20)
H(21)
H(22)
H(23)
H(24)
H(25)
H(26)
H(27)
H(28)
H(n) is the digital filter coefficient.
Upper
H(55)
H(54)
H(53)
H(52)
H(51)
H(50)
H(49)
H(48)
H(47)
H(46)
H(45)
H(44)
H(43)
H(42)
H(41)
H(40)
H(39)
H(38)
H(37)
H(36)
H(35)
H(34)
H(33)
H(32)
H(31)
H(30)
H(29)
Interpolation filter coefficients
Value
0
13
0
0
72
0
0
245
0
0
650
0
0
1521
0
0
3671
0
0
20756
32768
4
34
138
408
1003
2315
6642
[1]
Rev. 01 — 28 July 2009
Dual 12-bit DAC, up to 650 Msps; 2 4 and 8 interpolating
Second interpolation filter
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
H(9)
H(10)
H(11)
H(12)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Upper
H(23)
H(22)
H(21)
H(20)
H(19)
H(18)
H(17)
H(16)
H(15)
H(14)
H(13)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Value
0
17
0
0
238
0
0
2530
4096
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2
75
660
Table 33 “Interpolation filter
[1]
DAC1205D650
Third interpolation filter
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Upper
H(15)
H(14)
H(13)
H(12)
H(11)
H(10)
H(9)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
© NXP B.V. 2009. All rights reserved.
Value
0
273
0
0
4964
8192
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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