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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX128 Datasheet

Multirange / +5V / 12-Bit DAS with 2-Wire Serial Interface

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MAX128 pdf
MAX127/MAX128
EVALUATION KIT AVAILABLE
Multirange, +5V, 12-Bit DAS with
2-Wire Serial Interface
General Description
The MAX127/MAX128 are multirange, 12-bit data acquisi-
tion systems (DAS) that require only a single +5V supply
for operation, yet accept signals at their analog inputs
that may span above the power-supply rail and below
ground. These systems provide eight analog input chan-
nels that are independently software programmable for
a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for
the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to
+VREF/2 for the MAX128. This range switching increases
the effective dynamic range to 14 bits and provides the
flexibility to interface 4–20mA, ±12V, and ±15V-powered
sensors directly to a single +5V system. In addition, these
converters are fault protected to ±16.5V; a fault condition
on any channel will not affect the conversion result of the
selected channel. Other features include a 5MHz band-
width track/hold, an 8ksps throughput rate, and the option
of an internal 4.096V or external reference.
The MAX127/MAX128 feature a 2-wire, I2C-compatible
serial interface that allows communication among multiple
devices using SDA and SCL lines.
A hardware shutdown input (SHDN) and two softwarepro-
grammable power-down modes (standby and full power-
down) are provided for low-current shutdown between
conversions. In standby mode, the reference buffer
remains active, eliminating startup delays.
The MAX127/MAX128 are available in 24-pin narrow
PDIP or space-saving 28-pin SSOP packages.
Applications
● Industrial Control Systems
● Data-Acquisition Systems
● Robotics
● Automatic Testing
● Battery-Powered Instruments
● Medical Instruments
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX127ACNG+ 0°C to +70°C 24 Narrow PDIP
MAX127ACNG+ 0°C to +70°C 24 Narrow PDIP
+Denotes a lead(Pb)-free/RoHS-compliant package.
INL
(LSB)
±1/2
±1
Ordering Information continued at end of data sheet.
Features
● 12-Bit Resolution, 1/2 LSB Linearity
● +5V Single-Supply Operation
● I2C-Compatible, 2-Wire Serial Interface
● Four Software-Selectable Input Ranges
• MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
• MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF,
±VREF/2
● 8 Analog Input Channels
● 8ksps Sampling Rate
● ±16.5V Overvoltage-Tolerant Input Multiplexer
● Internal 4.096V or External Reference
● Two Power-Down Modes
● 24-Pin Narrow PDIP or 28-Pin SSOP Packages
Typical Operating Circuit
+5V
0.1µF
ANALOG
INPUTS
4.7µF
VDD
SHDN
CH0
CH1
CH2
CH3 MAX127
CH4
CH5
MAX128
CH6
CH7
REF
REFADJ
SCL
SDA
A0
A1
A2
0.01µF
DGND AGND
µC
SCL SDA
1k
Pin Configurations appear at end of data sheet.
19-4773; Rev 1; 12/12


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX128 Datasheet

Multirange / +5V / 12-Bit DAS with 2-Wire Serial Interface

No Preview Available !

MAX128 pdf
MAX127/MAX128
Multirange, +5V, 12-Bit DAS with
2-Wire Serial Interface
Absolute Maximum Ratings
VDD to AGND...........................................................-0.3V to +6V
AGND to DGND....................................................-0.3V to +0.3V
CH0–CH7 to AGND...........................................................±16.5V
REF to AGND............................................ -0.3V to (VDD + 0.3V)
REFADJ to AGND..................................... -0.3V to (VDD + 0.3V)
A0, A1, A2 to DGND.................................. -0.3V to (VDD + 0.3V)
SHDN, SCL, SDA to DGND.....................................-0.3V to +6V
Max Current into Any Pin....................................................50mA
Continuous Power Dissipation (TA = +70°C)
24-Pin Narrow PDIP
(derate 13.33mW/°C above +70°C)...........................1067mW
28-Pin SSOP (derate 15mW/°C above +70°C)..........1201mW
Operating Temperature Ranges
MAX127_ C_ _/MAX128_ C_ _..........................0°C to +70°C
MAX127_ E_ _/MAX128_ E_ _....................... -40°C to +85°C
Storage Temperature Range ............................-65°C to +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 = +5V ±5%; unipolar/bipolar range; external reference mode, VREF = 4.096V; 4.7μF at REF; external clock, fCLK = 400kHz;
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
ACCURACY (Note 1)
Resolution
12
Integral Nonlinearity
MAX127A
INL
MAX127B/MAX128B
±1/2
±1
Differential Nonlinearity
DNL
±1
Offset Error
Unipolar
Bipolar
MAX127A
MAX127B/MAX128B
MAX127A
MAX127B/MAX128B
±3
±5
±5
±10
Channel-to-Channel Offset Error
Matching
Unipolar
Bipolar
±0.1
±0.3
Gain Error (Note 2)
Unipolar
Bipolar
MAX127A
MAX127B/MAX128B
MAX127A
MAX127B/MAX128B
±7
±10
±7
±10
Gain Tempco (Note 2)
Unipolar
Bipolar
3
5
DYNAMIC SPECIFICATIONS (800Hz sine-wave input, ±10VP-P (MAX127) or ±4.096VP-P (MAX128), fSAMPLE = 8ksps)
Signal-to-Noise Plus Distortion
Ratio
SINAD
70
UNITS
Bits
LSB
LSB
LSB
LSB
LSB
ppm/°C
dB
Total Harmonic Distortion
Spurious-Free Dynamic Range
Channel-to-Channel Crosstalk
Aperture Delay
Aperture Jitter
THD
SFDR
Up to the 5th harmonic
4kHz, VIN = ±5V (Note 3)
DC, VIN = ±16.5V
-87 -80
dB
81 dB
-86
dB
-96
200 ns
10 ns
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX128
Description Multirange / +5V / 12-Bit DAS with 2-Wire Serial Interface
Maker Maxim
Total Page 16 Pages
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