DatasheetsPDF.com

MAX127 Dataheets PDF



Part Number MAX127
Manufacturers Maxim
Logo Maxim
Description Multirange / +5V / 12-Bit DAS with 2-Wire Serial Interface
Datasheet MAX127 DatasheetMAX127 Datasheet (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 acquisition 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 channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for .

  MAX127   MAX127


Document
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 acquisition 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 channels 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 bandwidth 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 softwareprogrammable power-down modes (standby and full powerdown) 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 1kΩ Pin Configurations appear at end of data sheet. 19-4773; Rev 1; 12/12 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/MAX1.


MAX1265 MAX127 MAX128


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)