MAX1401EAI+ Maxim Integrated Products, MAX1401EAI+ Datasheet
MAX1401EAI+
Specifications of MAX1401EAI+
Related parts for MAX1401EAI+
MAX1401EAI+ Summary of contents
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... MAX1401EAI -40°C to +85°C SPI and QSPI are trademarks of Motorola, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Oversampling (Sigma-Delta) ADC o 18-Bit Resolution, Sigma-Delta ADC ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC ABSOLUTE MAXIMUM RATINGS V+ to AGND, DGND .................................................-0. AGND, DGND ...............................................-0.3V to +6V DD AGND to DGND.....................................................-0.3V to +0.3V Analog Inputs to AGND................................-0.3V to (V+ + 0.3V) Analog Outputs ...
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Low-Power, Multichannel, ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V +2.7V to +3.6V otherwise noted. Typical values are at T PARAMETER SYMBOL OFFSET DAC Offset DAC Range (Note 8) Offset DAC Resolution Offset DAC ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V +2.7V to +3.6V otherwise noted. Typical values are PARAMETER SYMBOL AIN and REFIN Input Sampling f S Frequency ...
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Low-Power, Multichannel, ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V +2.7V to +3.6V otherwise noted. Typical values are at T PARAMETER SYMBOL ANALOG POWER-SUPPLY CURRENT (Measured with digital inputs at either DGND or V ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V +2.7V to +3.6V otherwise noted. Typical values are PARAMETER SYMBOL POWER DISSIPATION ( +3.3V, digital ...
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Low-Power, Multichannel, Note 16: These specifications apply to CLKOUT only when driving a single CMOS load. Note 17: The burn-out currents require a 500mV overhead between the analog input voltage and both V+ and AGND to operate correctly. ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC TIMING CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V +2.7V to +3.6V, AGND = DGND unless otherwise noted.) (Notes 21, 22, 23) MAX PARAMETER SYMBOL SERIAL-INTERFACE WRITE OPERATION ...
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Low-Power, Multichannel, (V+ = +3V +3V +1.25V, REFIN- = AGND REFIN+ DIFFERENTIAL NONLINEARITY 15 480sps GAIN = +1V/V 10 262, 144 pts -10 -15 -1.0 -0.5 DIFFERENTIAL INPUT VOLTAGE ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC (V+ = +3V +3V +1.25V, REFIN- = AGND REFIN+ V SUPPLY CURRENT vs. TEMPERATURE DD (240sps OUTPUT DATA RATE UNBUFFERED) 450 400 350 300 250 200 150 ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC PIN NAME Clock Input. A crystal can be connected across CLKIN and CLKOUT. Alternatively, drive CLKIN with a 1 CLKIN CMOS-compatible clock at a nominal frequency of 2.4576MHz or 1.024MHz, and leave CLKOUT ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC PIN NAME Negative Gain Calibration Input. Used for system gain calibration. It forms the negative input of a fully differential input pair with CALGAIN+. Normally these inputs are connected to reference voltages in ...
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Low-Power, Multichannel, _______________Detailed Description Circuit Description The MAX1401 is a low-power, multichannel, serial- output, sigma-delta ADC designed for applications with a wide dynamic range, such as weigh scales and pres- sure transducers. The functional diagram in Figure 2 ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Serial Digital Interface The serial digital interface provides access to eight on- chip registers (Figure 3). All serial-interface commands begin with a write to the communications register (COMM). On power-up, system reset, or ...
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Low-Power, Multichannel, Selecting Clock Polarity The serial interface can be operated with the clock idling either high or low. This is compatible with Motorola’s SPI interface operated in CPOL = 1, CPHA = 1 mode or CPOL = ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC FSYNC: (Default = 0) Filter Sync Bit. When FSYNC = 0, conversions are automatically performed at a data rate determined by CLK, FS1, FS0, MF1, and MF0 bits. When FSYNC = 1, the ...
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Low-Power, Multichannel, channels, selection of either calibration mode (01 or 10) will cause the scanning sequence to be extended to include a conversion on both the CALGAIN+/CALGAIN- input pair and the CALOFF+/CALOFF- input pair. The exact sequence depends ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Table 4. SCAN Mode Scanning Sequences (SCAN = 1) DIFF M1 M0 SEQUENCE AIN1–AIN6, AIN2–AIN6, AIN3–AIN6 AIN4–AIN6, AIN5–AIN6 AIN1–AIN6, AIN2–AIN6, AIN3–AIN6 AIN4–AIN6, AIN5–AIN6, CALOFF, CALGAIN AIN1–AIN6, AIN2–AIN6, ...
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Low-Power, Multichannel, Analog Inputs AIN1 to AIN6 Inputs AIN1 and AIN2 map to transfer-function register 1, regardless of scanning mode (SCAN = 1) or single- ended vs. differential (DIFF) modes. Likewise, AIN3 and AIN4 inputs always map to ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Table 8. Transfer-Function Register Mapping—Normal Mode ( SCAN DIFF ...
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Low-Power, Multichannel, Table 10. Transfer-Function Register Mapping—Gain-Calibration Mode ( SCAN DIFF ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Table 11. Channel ID Tag Codes CID2 CID1 CID0 ...
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Low-Power, Multichannel, External Access to Mux Outputs The MAX1401 provides access to the switching-net- work output and the modulator input with the MUXOUT and ADCIN pins. This allows the user to share a single high-performance amplifier for additional ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Table 13c Values for Less than 16-Bit Gain Error in Unbuffered (BUFF = 0) EXT EXT Mode; 4x Modulator Sampling Frequency (MF1, MF0 = 10 ); X2CLK = 0; f ...
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Low-Power, Multichannel, Table 14 Values for Less than 16-Bit Gain Error in Buffered (BUFF = 1) EXT EXT Mode; All Modulator Sampling Frequencies (MF1, MF0 = XX); X2CLK = 0; f 2.4576MHz PGA GAIN C ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Table 15. Modulator Operating Frequency, Sampling Frequency, and 16-Bit Data Output Rates CLKIN FREQUENCY, f (MHz) CLKIN X2CLK = 0 X2CLK = 1 DEFAULT 1.024 2.048 1.024 2.048 1.024 2.048 1.024 2.048 2.4576 ...
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Low-Power, Multichannel, Table 16b. Noise vs. Gain and Output Data Rate—Buffered Mode 2.4576MHz CLKIN OUTPUT -3dB DATA FREQ. RATE (Hz) (sps 13.1 5.72 3.21 60 15.7 6.29 3.57 300 78.6 80.6 39.8 157.2 ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC The noise shown in Tables 16a and 16b is composed of device noise and quantization noise. The device noise is relatively low but becomes the limiting noise source for high gain settings. The ...
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Low-Power, Multichannel, The on-chip digital filter processes the 1-bit data stream from the modulator using a SINC ter. The SINC filters are conceptually simple, efficient, and extremely flexible, especially where variable reso- lution and data rates are required. ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC input can four-times the output data period. For a synchronized step input (using the FSYNC func- tion or the internal scanning logic), the settling time is three-times the output data ...
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Low-Power, Multichannel, /* Assumptions: ** The MAX140X's CS pin is tied to ground ** The MAX140X's INT pin drives a falling-edge-triggered interrupt ** MAX140X's DIN is driven by MOSI, DOUT drives MISO, and SCLK drives SCLK */ /* ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC V DD P3.0 8051 P3.1 Figure 13. MAX1401 to 8051 Interface Listing 2. Bit-Banging SPI Replacement 32 ______________________________________________________________________________________ Bit-Banging Interface (80C51, PIC16C54) Any microcontroller can use general-purpose I/O pins to interface to the ...
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Low-Power, Multichannel, Strain-Gauge Operation Connect the differential inputs of the MAX1401 to the bridge network of the strain gauge. In Figure 14, the analog positive supply voltage powers the bridge net- work and the MAX1401 along with its ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC THERMOCOUPLE R JUNCTION AIN1 SWITCHING NETWORK R AIN2 C C +3V +1.25V REFIN+ REFIN- AGND Figure 15. Thermocouple Application with MAX1401 ISOLATION BARRIER V+ SENSOR 4 4 SPI SPI GND Figure 16. 4–20mA ...
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Low-Power, Multichannel, Grounding and Layout For best performance, use printed circuit boards with separate analog and digital ground planes. Wire-wrap boards are not recommended. Design the printed circuit board so the analog and digi- tal sections are separated ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 36 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products ...