Rainbow Electronics MAX1211 - Manual (Page 4)

MAX1211
65Msps, 12-Bit, IF Sampling ADC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V DD = 3.3V, OV DD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), C REFOUT = 0.1µF, C L
≈ 5pF at digital outputs, V
IN = -
0.5dBFS, CLKTYP = high, DCE = high, PD = low, G/T = low, f CLK = 65MHz (50% duty cycle), C REFP = C REFN = 0.1µF, 1µF in parallel with
10µF between REFP and REFN, C COM = 0.1µF in parallel with 2.2µF to GND, T A = -40°C to +85°C, unless otherwise noted. Typical values
are at T A = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Source 1.0
Maximum COM Current I
COM
Sink 0.4
mA
REFIN Input Resistance >50 M Ω
UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V REFP , V REFN , and V COM are applied externally)
COM Input Voltage V COM V DD / 2 1.65 V
REFP Input Voltage V REFP - V COM 0.512 V
REFN Input Voltage V REFN - V COM -0.512 V
Differential Reference Input
Voltage
V REF V REF = V REFP - V REFN 1.024 V
REFP Sink Current I REFP V REFP = 2.162V 1.1 mA
REFN Source Current I
REFN
V
REFN
= 1.138V 1.1 mA
COM Sink Current I COM 0.3 mA
REFP, REFN Capacitance 13 pF
COM Capacitance 6 pF
CLOCK INPUTS (CLKP, CLKN)
Single-Ended Input High
Threshold
V IH CLKTYP = GND, CLKN = GND
0.8 x
V DD
V
Single-Ended Input Low
Threshold
V IL CLKTYP = GND, CLKN = GND
0.2 x
V DD
V
Differential Input Voltage Swing CLKTYP = high 1.4 V P-P
Differential Input Common-Mode
Voltage
CLKTYP = high V
DD
/ 2 V
DCE = OV DD 20
Minimum Clock Duty Cycle
DCE = GND 45
%
DCE = OV DD 80
Maximum Clock Duty Cycle
DCE = GND 65
%
Input Resistance R CLK Figure 4 5 k Ω
Input Capacitance C
CLK
2 pF
DIGITAL INPUTS (CLKTYP, G/T, PD)
Input High Threshold V IH
0.8 x
OV DD
V
Input Low Threshold V IL
0.2 x
OV DD
V
V IH = OV DD
±5
Input Leakage Current
V IL = 0 ±5
µA
Input Capacitance C
DIN
5 pF