MAX1377/MAX1379/MAX1383
Dual, 12-Bit, 1.25Msps Simultaneous-Sampling
ADCs with Serial Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
AVDD to AGND ........................................................-0.3V to +6V
V
L
to DGND ..............................................................-0.3V to +6V
SCLK, CS, CNVST, U/B, S/D, SEL,
REFSEL to DGND.......................................-0.3V to (V
L
+ 0.3V)
DOUT_ to DGND...........................................-0.3V to (V
L
+ 0.3V)
AIN1A, AIN1B, AIN2A, AIN2B to AGND
MAX1377/MAX1379 .............................-0.3V to (AVDD + 0.3V)
MAX1383 ..............................................................-12V to +12V
RGND to AGND.....................................................-0.3V to +0.3V
RGND to DGND.....................................................-0.3V to +0.3V
DGND to AGND.....................................................-0.3V to +0.3V
Maximum Current into Any Pin (except power-supply pins).....50mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin Thin QFN (derate 34.5mW/°C above +70°C) ...2758.6mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS—MAX1377
(V
AVDD
= 2.7V to 3.6V, V
L
= 1.8V to AVDD, f
SCLK
= 20MHz (50% duty cycle), V
REF
= 2.048V, REFSEL = V
L
, S/D = DGND, C
REF
=
1µF; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY
Resolution 12 Bits
Relative Accuracy INL (Note 1) -1.25 +1.25 LSB
Differential Nonlinearity DNL -1 +1.5 LSB
Offset Error ±8 LSB
Offset-Error Matching ±12 LSB
Gain Error (Note 2) ±6 LSB
Gain-Error Matching (Note 2) ±6 LSB
Gain Temperature Coefficient ±2 ppm/
o
C
AIN1A to AIN1B, AIN2A to AIN2B 80
DC Input Isolation
AIN1A to AIN2A, AIN1B to AIN2B 80
dB
DYNAMIC SPECIFICATIONS (f
IN
= 500kHz, 2V
P-P
sine wave, 1.25Msps, 20MHz f
SCLK
)
Unipolar 66 69.5
Signal-to-Noise Plus Distortion SINAD
Bipolar 67 70
dB
Unipolar 66 70
Signal-to-Noise Ratio SNR
Bipolar 67 70
dB
Total Harmonic Distortion THD Up to the 5th harmonic -84 -74 dB
Spurious-Free Dynamic Range SFDR -86 -76 dB
Intermodulation Distortion IMD f
IN1
= 103.5kHz, f
IN2
= 113.5kHz -78 dB
Full-Power Bandwidth -3dB point 5 MHz
Full-Linear Bandwidth (S/N + D) > 68dB, 1V input 1 MHz
CONVERSION RATE (Figure 4)
Minimum Conversion Time t
CONV
16 clock cycles per conversion (Note 3) 0.800 µs
Dual output mode, S/D = 0 1.25
Maximum Throughput Rate
Single output mode, S/D = 1 0.625
Msps
Minimum Throughput Rate for
Full Bandwidth Signal
(Note 4) 10 ksps
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