Electrical characteristics (continued) – Rainbow Electronics MAX1209 User Manual
Page 4
MAX1209
12-Bit, 80Msps, 3.3V IF-Sampling ADC
4
_______________________________________________________________________________________
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