MAX1403EAI+ Maxim Integrated Products, MAX1403EAI+ Datasheet
MAX1403EAI+
Specifications of MAX1403EAI+
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MAX1403EAI+ Summary of contents
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... MAX1403EAI -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 o 16-Bit Accuracy with No Missing Codes to 480sps o Matched On-Board Current Sources (200µ ...
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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 7) 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: The burn-out currents require a 500mV overhead between the analog input voltage and both V+ and AGND to operate correctly. Note 17: Measured the selected passband. PSR at 50Hz will exceed ...
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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 20, 21, 22) MAX PARAMETER SYMBOL CS Falling Edge ...
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Low-Power, Multichannel, (V+ = +3V +3V +1.25V, REFIN- = AGND REFIN+ +25°C, unless otherwise noted.) OUT1 AND OUT2 COMPLIANCE 250 200 150 100 +3. 0.5 1.0 1.5 ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC (V+ = +3V +3V +1.25V, REFIN- = AGND, f REFIN+ DD +25°C, unless otherwise noted.) V SUPPLY CURRENT vs. TEMPERATURE DD (240sps OUTPUT DATA RATE UNBUFFERED) 450 400 350 ...
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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 Differential Reference Input. Bias REFIN- between V+ and AGND, provided that REFIN+ is more 19 REFIN- positive than REFIN-. Positive Differential Reference Input. Bias REFIN+ between V+ and AGND, provided ...
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Low-Power, Multichannel, _______________Detailed Description Circuit Description The MAX1403 is a low-power, multichannel, serial-output, sigma-delta ADC designed for applications with a wide dynamic range, such as weigh scales and pressure transducers. The functional block diagram in Figure 2 contains ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC The MAX1403 can be configured to sequentially scan all signal inputs and to transmit the results through the serial interface with minimum communications over- head. The output word contains a channel identification tag ...
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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 are held in reset, inhibiting normal self-timed operation. This bit may be used to convert on command to mini- mize the settling time to valid output data synchro- nize operation of ...
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Low-Power, Multichannel, exact sequence depends on the state of the DIFF bit (Table 4). When scanning, the calibration channels use the PGA gain, format, and DAC settings defined by the contents of Transfer Function Register 3. BUFF: (Default ...
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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, Transducer Excitation Currents The MAX1403 provides two matched 200µA transducer excitation currents at OUT1 and OUT2. These currents have low absolute temperature coefficients and tight TC matching. These characteristics enable accurate compensation of errors due to ...
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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; CLKIN = ...
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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; CLKIN = 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 39.8 600 ...
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Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC Offset-Correction DAC The MAX1403 provides a coarse (3-bit plus sign) offset- correction DAC at the modulator input. Use this DAC to remove the offset component in the input signal, allow- ing the ADC ...
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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 Analog Filtering The digital filter does not provide any rejection close to the harmonics of the modulator sample frequency. However, due to the high oversampling ratio of the MAX1403, these bands occupy only ...
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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. MAX1403 to 8051 Interface /* Low-level function to write 8 bits ** The example shown here is for a bit-banging system with (CPOL=1, CPHA=1) */ void ...
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Low-Power, Multichannel, Strain-Gauge Operation Connect the differential inputs of the MAX1403 to the bridge network of the strain gauge. In Figure 14, the analog positive supply voltage powers the bridge net- work and the MAX1403 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 MAX1403 ISOLATION BARRIER V+ SENSOR 4 4 µP/µC SPI SPI GND Figure 16. ...
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Low-Power, Multichannel 200µA OUT1 12.5k AIN1 R L1 PGA AIN2 RTD GAIN = 1 TO 128 OUT2 R L2 200µA AGND R L3 Figure 17. 3-Wire RTD Application Unlike the 3-wire configuration, the 4-wire configuration ...
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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 Good decoupling is important when using high-resolu- tion ADCs. Decouple all analog supplies with 10µ ...