Rainbow Electronics MAX1209 - Manual (Page 12)

MAX1209
12-Bit, 80Msps, 3.3V IF-Sampling ADC
12 ______________________________________________________________________________________
PIN NAME FUNCTION
1 REFP
Positive Reference I/O. The full-scale analog input range is ±(V
REFP - V REFN ). Bypass REFP to GND with
a 0.1µF capacitor. Connect a 1µF capacitor in parallel with a 10µF capacitor between REFP and REFN.
Place the 1µF REFP to REFN capacitor as close to the device as possible on the same side of the
printed circuit (PC) board.
2 REFN
Negative Reference I/O. The full-scale analog input range is ±(V
REFP - V REFN ). Bypass REFN to GND
with a 0.1µF capacitor. Connect a 1µF capacitor in parallel with a 10µF capacitor between REFP and
REFN. Place the 1µF REFP to REFN capacitor as close to the device as possible on the same side
of the PC board.
3 COM
Common-Mode Voltage I/O. Bypass COM to GND with a 2.2µF capacitor. Place the 2.2µF COM to
GND capacitor as close to the device as possible. This 2.2µF capacitor can be placed on the
opposite side of the PC board and connected to the MAX1209 through a via.
4, 7, 16,
35
GND Ground. Connect all ground pins and EP together.
5 INP Positive Analog Input
6 INN Negative Analog Input
8 DCE
Duty-Cycle Equalizer Input. Connect DCE low (GND) to disable the internal duty-cycle equalizer.
Connect DCE high (OV
DD or V DD ) to enable the internal duty-cycle equalizer.
9 CLKN
Negative Clock Input. In differential clock input mode (CLKTYP = OV
DD
or V
DD
), connect the differential
clock signal between CLKP and CLKN. In single-ended clock mode (CLKTYP = GND), apply the single-
ended clock signal to CLKP and connect CLKN to GND.
10 CLKP
Positive Clock Input. In differential clock input mode (CLKTYP = OV DD or V DD ), connect the differential
clock signal between CLKP and CLKN. In single-ended clock mode (CLKTYP = GND), apply the single-
ended clock signal to CLKP and connect CLKN to GND.
11 CLKTYP
Clock Type Definition Input. Connect CLKTYP to GND to define the single-ended clock input. Connect
CLKTYP to OV
DD or V DD to define the differential clock input.
12–15, 36 V DD
Analog Power Input. Connect V DD to a 3.0V to 3.6V power supply. Bypass V DD to GND with a parallel
capacitor combination of ≥2.2µF and 0.1µF. Connect all V
DD pins to the same potential.
17, 34 OV DD
Output-Driver Power Input. Connect OV DD to a 1.7V to V DD power supply. Bypass OV DD to GND with a
parallel capacitor combination of ≥2.2µF and 0.1µF.
18 DOR
Data Out-of-Range Indicator. The DOR digital output indicates when the analog input voltage is out of
range. When DOR is high, the analog input is beyond its full-scale range. When DOR is low, the analog
input is within its full-scale range (Figure 6).
19 D11 CMOS Digital Output, Bit 11 (MSB)
20 D10 CMOS Digital Output, Bit 10
21 D9 CMOS Digital Output, Bit 9
22 D8 CMOS Digital Output, Bit 8
23 D7 CMOS Digital Output, Bit 7
24 D6 CMOS Digital Output, Bit 6
25 D5 CMOS Digital Output, Bit 5
26 D4 CMOS Digital Output, Bit 4
27 D3 CMOS Digital Output, Bit 3
Pin Description