ADC1412D Datasheet, PDF (17/40 Pages) NXP Semiconductors – Dual 14-bit ADC; 65 Msps, 80 Msps, 105 Msps or 125 Msps; CMOS or LVDS DDR digital outputs

NXP Semiconductors
ADC1412D series
CMOS or LVDS DDR digital outputs
R
INAP/INBP
C
R
INAM/INBM
Fig 9. Anti-kickback circuit
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The component values are determined by the input frequency and should be selected so
as not to affect the input bandwidth.
Table 11. RC coupling versus input frequency, typical values
Input frequency (MHz)
R (Ω)
C (pF)
3
25
12
70
12
8
170
12
8
11.2.3 Transformer
The configuration of the transformer circuit is determined by the input frequency. The
configuration shown in Figure 10 would be suitable for a baseband application.
ADT1-1WT
Analog ^{100 nF}
input
100 nF
100 nF
100 nF
100 nF
25 Ω
25 Ω
25 Ω
25 Ω
INAP/INBP
12 pF
INAM/INBM
VCMA/VCMB
100 nF
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Fig 10. Single transformer configuration suitable for baseband applications
The configuration shown in Figure 11 is recommended for high frequency applications. In
both cases, the choice of transformer is a compromise between cost and performance.
ADC1412D_SER
Preliminary data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 6 August 2010
© NXP B.V. 2010. All rights reserved.
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