Rainbow Electronics MAX1209 - Manual (Page 4)

MAX1209
12-Bit, 80Msps, 3.3V IF-Sampling ADC
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ELECTRICAL CHARACTERISTICS (continued)
(V DD = 3.3V, OV DD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), V IN = -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f CLK = 80MHz (50% duty cycle), 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
INTERNAL REFERENCE (REFIN = REFOUT; V REFP , V REFN , and V COM are generated internally)
REFOUT Output Voltage V REFOUT 1.984 2.048 2.070 V
COM Output Voltage V COM V DD / 2 1.65 V
Differential Reference Output
Voltage
V REF V REF = V REFP - V REFN 1.024 V
REFOUT Load Regulation 35 mV/mA
REFOUT Temperature Coefficient TC REF +50 ppm/°C
Short to V DD —sinking 0.24
REFOUT Short-Circuit Current
Short to GND—sourcing 2.1
mA
BUF F ERED EXTERNAL REF ERENCE (REF IN d ri ven extern al ly; V R EF IN = 2.048V, V R EF P , V R EF N , an d V C OM are g en erated in tern ally)
REFIN Input Voltage V REFIN 2.048 V
REFP Output Voltage V REFP (V DD / 2) + (V REFIN / 4) 2.162 V
REFN Output Voltage V REFN (V DD / 2) - (V REFIN / 4) 1.138 V
COM Output Voltage V COM V DD / 2 1.60 1.65 1.70 V
Differential Reference Output
Voltage
V
REF
V
REF
= V
REFP
- V
REFN
0.971 1.024 1.069 V
Differential Reference
Temperature Coefficient
±25 ppm/°C
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