dac1628d1g25 NXP Semiconductors, dac1628d1g25 Datasheet - Page 22

• Manufacturer Part Number: dac1628d1g25
• Description: Dual 16-bit Dac Jesd204b Interface Up To 1.25 Gsps; X2, X4 And X8 Interpolating
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 11.
DAC1628D1G25
Objective data sheet
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
H(9)
H(10)
First interpolation filter
Interpolation filter coefficients
Upper
H(55)
H(54)
H(53)
H(52)
H(51)
H(50)
H(49)
H(48)
H(47)
H(46)
10.5 Operating modes
10.6 Finite Impulse Response (FIR) filters
The DAC1628D1G25 can operate with a clock frequency up to 500 MHz, or up to
1250 MHz if the internal PLL is bypassed. The clock input can be LVDS but it can also be
interfaced with CML. Clock Domain Interface (CDI) logic handles the error free data
transition from one internal clock domain to another.
During the reset phase (RESET_N asserted), the clock must be stable and running,
ensuring a proper reset of the complete device.
The DAC1628D1G25 requires one single differential clock: the data clock (CLKINP,
CLKINN) for the internal PLL and the dual DAC core.
Set CDI and PLL correctly to configure the DAC1628D1G25 for application mode.
The three interpolation FIR filters have a stop band attenuation of at least 80 dBc and a
pass band ripple of less than 0.0005 dB.
Fig 10. Interfacing CML to LVDS
Value
4
0
+13
0
34
0
+72
0
138
0
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
H(9)
H(10)
All information provided in this document is subject to legal disclaimers.
CML
Second interpolation filter
Rev. 1.1 — 10 October 2011
Z
H(17)
Upper
H(23)
H(22)
H(21)
H(20)
H(19)
H(18)
H(16)
H(15)
H(14)
diff = 100 Ω
Dual 16-bit DAC: JESD204B interface; up to 1.25 Gsps
1 kΩ
100 nF
100 nF
Value
2
0
+17
0
75
0
+238
0
660
0
V
DDA(1V8)
AGND
1.1 kΩ
2.2 kΩ
55 Ω
55 Ω
Lower
H(1)
H(2)
H(3)
H(4)
H(6)
H(7)
H(8)
H(5)
-
-
CLKINN
CLKINP
100 nF
DAC1628D1G25
Third interpolation filter
Upper
H(15)
H(14)
H(13)
H(12)
H(11)
H(10)
H(9)
-
-
-
001aah020
LVDS
© NXP B.V. 2011. All rights reserved.
0
0
0
+4964
+8192
Value
39
+273
1102
-
-
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