MAX1437 Datasheet, PDF (5/23 Pages) Maxim Integrated Products – Octal, 12-Bit, 50Msps, 1.8V ADC with Serial LVDS Outputs

Octal, 12-Bit, 50Msps, 1.8V ADC
with Serial LVDS Outputs
ELECTRICAL CHARACTERISTICS (continued)
(AV_DD = 1.8V, OV_DD = 1.8V, CV_DD = 3.3V, GND = 0, external V_REFIO = 1.24V, C_REFIO to GND = 0.1µF, C_REFP to GND = 10µF,
C_REFN to GND = 10µF, f_CLK = 50MHz (50% duty cycle), V_DT = 0, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at
T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
TIMING CHARACTERISTICS (Note 6)
CONDITIONS
Data Valid to CLKOUT Rise/Fall
t_OD Figure 5 (Note 7)
MIN
TYP
MAX UNITS
(t_SAMPLE /
24)
- 0.15
(t_SAMPLE /
24)
ns
+ 0.15
CLKOUT Output-Width High
t_CH Figure 5
t_SAMPLE /
12
ns
CLKOUT Output-Width Low
FRAME Rise to CLKOUT Rise
t_CL Figure 5
t_CF Figure 4 (Note 7)
Sample CLK Rise to FRAME Rise
Crosstalk
Gain Matching
Phase Matching
t_SF Figure 4 (Note 7)
C_GM
C_PM
(Note 2)
f_IN = 5.3MHz (Note 2)
f_IN = 5.3MHz (Note 2)
t_SAMPLE /
12
(t_SAMPLE /
24)
- 0.15
(t_SAMPLE /
24)
+ 0.15
(t_SAMPLE /
2)
+ 1.1
(t_SAMPLE /
2)
+ 2.6
-95
±0.1
±0.25
ns
ns
ns
dB
dB
Degrees
Note 1: Specifications at T_A ≥ +25°C are guaranteed by production testing. Specifications at T_A < +25°C are guaranteed by design
and characterization and not subject to production testing.
Note 2: See definition in the Parameter Definition section at the end of this data sheet.
Note 3: See the Common-Mode Output (CMOUT) section.
Note 4: Connect REFADJ to GND directly to enable internal reference mode. Connect REFADJ to AV_DD directly to disable the internal
bandgap reference and enable external reference mode.
Note 5: Measured using C_REFP to GND = 1µF and C_REFN to GND = 1µF. t_ENABLE time may be lowered by using smaller capacitor values.
Note 6: Data valid to CLKOUT rise/fall timing is measured from 50% of data output level to 50% of clock output level.
Note 7: Guaranteed by design and characterization. Not subject to production testing.
Typical Operating Characteristics
(AV_DD = 1.8V, OV_DD = 1.8V, CV_DD = 3.3V, GND = 0, internal reference, differential input at -0.5dBFS, f_IN = 5.3MHz, f_CLK = 50MHz
(50% duty cycle), V_DT = 0, C_LOAD = 10pF, T_A = +25°C, unless otherwise noted.)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
0
FFT PLOT
(16,384-POINT DATA RECORD)
f_CLK = 50.1523789MHz
f_IN = 5.304814MHz
A_IN = -0.5dBFS
SNR = 69.959dB
SINAD = 69.950dB
THD = -96.635dBc
SFDR = 96.503dBc
HD2 HD3
5
10
15
20
25
FREQUENCY (MHz)
FFT PLOT
(16,384-POINT DATA RECORD)
0
-10
f_CLK = 50.1523789MHz
f_IN = 24.0997118MHz
-20 A_IN = -0.5dBFS
-30 ^{SNR = 69.707dB}
SINAD = 69.672dB
-40 _{THD = -90.672dBc}
-50 ^{SFDR = 93.694dBc}
-60
-70
HD2
-80
HD3
-90
-100
-110
0
5
10
15
20
25
FREQUENCY (MHz)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
0
CROSSTALK
(16,384-POINT DATA RECORD)
MEASURED ON CHANNEL 1,
WITH INTERFERING SIGNAL
ON CHANNEL 2
f_IN(IN1) = 5.304814MHz
f_IN(IN2) = 24.0997118MHz
CROSSTALK = 103dB
f_IN(IN2)
5
10
15
20
25
FREQUENCY (MHz)
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