MAX12557 Datasheet, PDF (4/28 Pages) Maxim Integrated Products – Dual, 65Msps, 14-Bit, IF/Baseband ADC

Dual, 65Msps, 14-Bit, IF/Baseband ADC
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = 3.3V, OV_DD = 2.0V, GND = 0, REFIN = REFOUT (internal reference), C_L ≈ 10pF at digital outputs, V_IN = -0.5dBFS (differen-
tial), DIFFCLK/SECLK = OV_DD, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f_CLK = 65MHz, 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
Overdrive Recovery Time
±10% beyond full scale
1
Clock
Cycle
INTERCHANNEL CHARACTERISTICS
Crosstalk Rejection
Gain Matching
Offset Matching
INTERNAL REFERENCE (REFOUT)
REFOUT Output Voltage
V_REFOUT
REFOUT Load Regulation
REFOUT Temperature Coefficient TC_REF
REFOUT Short-Circuit Current
f_INA or f_INB = 70MHz at -0.5dBFS
f_INA or f_INB = 175MHz at -0.5dBFS
-1mA < I_REFOUT < +1mA
Short to V_DD—sinking
Short to GND—sourcing
90
85
±0.01
±0.01
±0.1
dB
dB
%FSR
2.000
2.048
35
±50
0.24
2.1
2.080
V
mV/mA
ppm/°C
mA
BUFFERED REFERENCE MODE (REFIN is driven by REFOUT or an external 2.048V single-ended reference source;
V_REFAP/V_REFAN/V_COMA and V_REFBP/V_REFBN/V_COMB are generated internally)
REFIN Input Voltage
REFIN Input Resistance
V_REFIN
R_REFIN
2.048
V
>50
MΩ
COM_ Output Voltage
V_COMA
V_COMB
V_DD / 2
1.60 1.65 1.70
V
REF_P Output Voltage
V_REFAP
V_REFBP
V_DD / 2 + (V_REFIN x 3/8)
2.418
V
REF_N Output Voltage
V_REFAN
V_REFBN
V_DD / 2 - (V_REFIN x 3/8)
0.882
V
Differential Reference Voltage
V_REFA
V_REFB
V_REFA = V_REFAP - V_REFAN
V_REFB = V_REFBP - V_REFBN
1.460 1.536 1.580
V
Differential Reference
Temperature Coefficient
TC_REF
±25
ppm/°C
UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V_REFAP/V_REFAN/V_COMA and V_REFBP/V_REFBN/V_COMB are applied
externally, V_COMA = V_COMB = V_DD / 2)
REF_P Input Voltage
REF_N Input Voltage
COM_ Input Voltage
Differential Reference Voltage
V_REFAP
V_REFBP
V_REFAN
V_REFBN
V_COM
V_REFA
V_REFB
V_{REF_P} - V_COM
V_{REF_N} - V_COM
V_DD / 2
V_{REF_} = V_{REF_P} - V_{REF_N} = V_REFIN x 3/4
+0.768
V
-0.768
V
1.65
V
1.536
V
4 _______________________________________________________________________________________