at84ad001b ATMEL Corporation, at84ad001b Datasheet - Page 52

• Manufacturer Part Number: at84ad001b
• Description: Dual 8-bit 1 Gsps Adc
• Manufacturer: ATMEL Corporation

Figure 57. Termination Method for the ADC Analog Inputs in AC Coupling Mode
Clock Implementation
52
AT84AD001B
Channel Q
Channel I
50Ω Source
50Ω Source
The ADC features two different clocks (I or Q) that must be implemented as shown in
Figure 58. Each path must be AC coupled with a 100 nF capacitor.
Figure 58. Differential Termination Method for Clock I or Clock Q
Note:
GND
GND
When only clock I is used, it is not necessary to add the capacitors on the CLKQ and
CLKQN signal paths; they may be left floating.
CLKB
CLK
50Ω
50Ω
50Ω
50Ω
GND
GND
100 nF
100 nF
ADC Package
VinI
VinI
VinIB
VinIB
VinQ
VinQ
VinQB
VinQB
50Ω
50Ω
VCCD/2
Dual ADC
2153C–BDC–04/04