Datasheet

MAX1240/MAX1241
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
2 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V (MAX1240); V
DD
= +2.7V to +5.25V (MAX1241); 73ksps, f
S
CLK
= 2.1MHz (50% duty cycle); MAX1240—4.7µF
capacitor at REF pin, MAX1241—external reference; V
REF
= 2.500V applied to REF pin; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
V
DD
to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (V
DD
+ 0.3V)
REF to GND ...............................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND...............................................-0.3V to +6V
DOUT to GND............................................-0.3V to (V
DD
+ 0.3V)
DOUT Current..................................................................±25mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ...........727mW
SO (derate 5.88mW/°C above +70°C)........................471mW
CERDIP (derate 8.00mW/°C above +70°C)................640mW
Operating Temperature Ranges
MAX1240_C_A/MAX1241_C_A .........................0°C to +70°C
MAX1240_E_ A/MAX1241_E_ A .....................-40°C to +85°C
MAX1240_MJA/MAX1241_MJA ...................-55°C to +125°C
Storage Temperature Range............................-60°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
Soldering Temperature (reflow)
PDIP, SO.....................................................................+260°C
CDIP ...........................................................................+250°C
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.
71.5MAX124_C
Input Voltage Range 0V
REF
V
Input Capacitance
Aperture Jitter <50 ps
16 pF
MAX124_A
MAX124_B/C
Aperture Delay t
APR
30 nsFigure 8
Track/Hold Acquisition Time t
ACQ
1.5 µs
Throughput Rate 73 kspsf
SCLK
= 2.1MHz
Conversion Time
PARAMETER SYMBOL MIN TYP MAX UNITS
±0.5 ±3.0
Offset Error LSB
Differential Nonlinearity DNL ±1 LSB
±1.0
Gain Temperature Coefficient
±0.5 ±4.0
Gain Error (Note 3) LSB±0.5 ±4.0
Resolution 12 Bits
Relative Accuracy (Note 2) INL
±0.5
LSB
t
CONV
5.5 7.5 µs
Small-Signal Bandwidth
Signal-to-Noise Plus
Distortion Ratio
SINAD
70
dB
2.25 MHz
Full-Power Bandwidth
Total Harmonic Distortion THD
-80
dB
1.0
-3dB rolloff
MHz
CONDITIONS
Spurious-Free Dynamic Range
ppm/°C
No missing codes over temperature
MAX124_B/C
±0.25
SFDR
MAX124_A/B
80
Up to the 5th harmonic
dB
MAX124_A/B
MAX124_A
MAX124_A/B
MAX124_C -88
MAX124_C 88
ANALOG INPUT
CONVERSION RATE
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 73ksps, f
SCLK
= 2.1MHz)
DC ACCURACY (Note 1)