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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1272 Datasheet

12-Bit ADCs

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MAX1272 pdf
19-2921; Rev 3; 12/11
EVAALVUAAILTAIOBNLEKIT
Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
General Description
The MAX1272/MAX1273 multirange 12-bit data-acquisi-
tion systems (DAS) operate with a single 5V supply. The
software-programmable analog input accepts a variety
of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the
MAX1272; ±VREF, ±VREF/2, 0 to VREF, 0 to VREF/2 for the
MAX1273. The software-selectable extended analog
input range increases the effective dynamic range to 14
bits and provides the flexibility to interface 4–20mA pow-
ered sensors directly to a single 5V system. In addition,
the MAX1272 provides fault protection to ±12V. Other
features include a 5MHz track/hold (T/H) bandwidth,
87ksps throughput rate, and internal (4.096V) or external
(2.40V to 4.18V) reference.
The MAX1272/MAX1273 serial interfaces connect
directly to SPI/QSPI™/MICROWIRE®-compatible
devices without any external logic.
Four software-programmable power-down modes
(delayed standby, immediate standby, delayed full power-
down, and immediate full power-down) provide low-cur-
rent shutdown between conversions. In standby mode, the
internal reference buffer remains active, thus eliminating
startup delay.
The MAX1272/MAX1273 are available in an 8-pin
µMAX® package. Both devices are available in the
extended (-40°C to +85°C) temperature range.
Applications
Industrial Control Systems
Data-Acquisition Systems
Robotics
Automatic Testing
Battery-Powered Instruments
Medical Instruments
Features
o Four Software-Selectable Input Ranges
MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V
MAX1273: 0 to VREF, 0 to VREF/2, ±VREF,
±VREF/2
o 12-Bit Resolution, No Missing Codes
o 5V Single-Supply Operation
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
Interface
o 87ksps Sampling Rate
o ±12V Fault-Protected Analog Input (MAX1272)
o Internal (4.096V) or External (2.4V to 4.18V)
Reference
o Low Power
1.5mA at 87ksps
0.4mA at 10ksps
0.2mA at 1ksps
o Four Power-Down Modes
o 8-Pin µMAX Package
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
MAX1272EUA+ -40°C to +85°C
MAX1273EUA+ -40°C to +85°C
8 µMAX
8 µMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
INL
(LSB)
±1
±1
Pin Configuration
TOP VIEW
Typical Application Circuit appears at end of data sheet.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SCLK 1 +
DIN 2
VDD 3
GND 4
MAX1272
MAX1273
µMAX
8 DOUT
7 CS
6 REF
5 AIN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1272 Datasheet

12-Bit ADCs

No Preview Available !

MAX1272 pdf
Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..............................................................-0.3V to +6V
AIN to GND (MAX1272) ...................................................... ±12V
AIN to GND (MAX1273) ........................................................ ±6V
DOUT, CS, DIN, SCLK, REF to GND..........-0.3V to (VDD + 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA = +70°C)
µMAX
Single-Layer Board (derate 4.5mW/ C above +70°C).........362mW
Multilayer Board (derate 4.8mW/ C above +70°C)...........387.8mW
Operating Temperature Ranges
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature .....................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
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.
ELECTRICAL CHARACTERISTICS
(VDD = 4.75V to 5.25V, unipolar/bipolar input range, external reference mode, VREF = 4.096V, CREF = 1.0µF, fSCLK = 1.4MHz,
50% duty cycle, CLOAD = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETERS
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ACCURACY (Note 1)
Resolution
12 Bits
Integral Nonlinearity
INL
±0.3 ±1.0
LSB
Differential Nonlinearity
DNL No missing codes over temperature
±0.35 ±1.00 LSB
Offset Error
Unipolar
Bipolar
±7.5
±7.5
LSB
Gain Error (Note 2)
Unipolar
Bipolar
±5
LSB
±7
Gain Error Temperature
Coefficient (Note 2)
Unipolar
Bipolar
±3
ppm/°C
±5
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±10VP-P (MAX1272), or ±4.096VP-P (MAX1273), fSAMPLE = 87ksps)
Signal-to-Noise + Distortion Ratio SINAD
69 72
dB
Total Harmonic Distortion
THD Up to the 5th harmonic
-87 -78
dB
Spurious-Free Dynamic Range
SFDR
80 88
dB
Aperture Delay
Aperture Jitter
tAD
tAJ
15 ns
<50 ps
ANALOG INPUT
T/H Acquisition Time
tACQ
2.85 µs
2 _______________________________________________________________________________________


Part Number MAX1272
Description 12-Bit ADCs
Maker Maxim Integrated
Total Page 19 Pages
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