MAX12527
Dual, 65Msps, 12-Bit, IF/Baseband ADC
4_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), CL≈10pF at digital outputs, VIN = -0.5dBFS (differen-
tial), DIFFCLK/SECLK = OVDD, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T= GND, fCLK = 65MHz, TA= -40°C to+85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Overdrive Recovery Time ±10% beyond full-scale 1 Clock
cycle
INTERCHANNEL CHARACTERISTICS
fINA or fINB = 70MHz at -0.5dBFS 90
Crosstalk Rejection fINA or fINB = 175MHz at -0.5dBFS 85 dB
Gain Matching
±0.01 ±0.1
dB
Offset Matching
±0.01
%FSR
INTERNAL REFERENCE (REFOUT)
REFOUT Output Voltage
VREFOUT 2.000 2.048 2.080
V
REFOUT Load Regulation -1mA < IREFOUT < +1mA 35
mV/mA
REFOUT Temperature Coefficient
TCREF
±50
ppm/°C
Short to VDD—sinking
0.24
REFOUT Short-Circuit Current Short to GND—sourcing 2.1 mA
BUFFERED REFERENCE MODE (REFIN is driven by REFOUT or an external 2.048V single-ended reference source;
VREFAP/VREFAN/VCOMA and VREFBP/VREFBN/VCOMB are generated internally)
REFIN Input Voltage VREFIN
2.048
V
REFIN Input Resistance RREFIN
>50
MΩ
COM_ Output Voltage VCOMA
VCOMB VDD / 2
1.60 1.65 1.70
V
REF_P Output Voltage VREFAP
VREFBP
VDD / 2 + (VREFIN x 3/8)
2.418
V
REF_N Output Voltage VREFAN
VREFBN
VDD / 2 - (VREFIN x 3/8)
0.882
V
Differential Reference Voltage VREFA
VREFB
VREFA = VREFAP - VREFAN
VREFB = VREFBP - VREFBN
1.440 1.536 1.590
V
Differential Reference
Temperature Coefficient TCREF
±25
ppm/°C
UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, VREFAP/VREFAN/VCOMA and VREFBP/VREFBN/VCOMB are applied
externally, VCOMA = VCOMB = VDD / 2)
REF_P Input Voltage VREFAP
VREFBP
VREF_P - VCOM
+0.768
V
REF_N Input Voltage VREFAN
VREFBN
VREF_N - VCOM
-0.768
V
COM_ Input Voltage VCOM VDD / 2
1.65
V
Differential Reference Voltage VREFA
VREFB VREF_ = VREF_P - VREF_N = VREFIN x 3/4
1.536
V