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ADS1274IPAPTG4 Datasheet(PDF) 7 Page - Texas Instruments |
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ADS1274IPAPTG4 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 51 page  ADS1274 ADS1278 www.ti.com SBAS367F – JUNE 2007 – REVISED FEBRUARY 2011 Table 1. ADS1274/ADS1278 PIN DESCRIPTIONS (continued) PIN NAME NO. FUNCTION DESCRIPTION AINN1 4 Analog input AINN2 2 Analog input AINN3 64 Analog input ADS1278: AINN[8:1] Negative analog input, channels 8 through 1. AINN4 62 Analog input AINN5 52 Analog input ADS1274: AINN[8:5] Connected to internal ESD rails. The inputs may float. AINN[4:1] Negative analog input, channels 4 through 1. AINN6 50 Analog input AINN7 48 Analog input AINN8 46 Analog input AVDD 5, 44, 53, 60 Analog power supply Analog power supply (4.75V to 5.25V). VCOM 55 Analog output AVDD/2 Unbuffered voltage output. VREFN 57 Analog input Negative reference input. VREFP 56 Analog input Positive reference input. CLK 27 Digital input Master clock input (fCLK). CLK input divider control: 1 = 37MHz (High-Speed mode)/otherwise 27MHz CLKDIV 10 Digital input 0 = 13.5MHz (low-power)/5.4MHz (low-speed) DGND 7, 21, 24, 25 Digital ground Digital ground power supply. DIN 12 Digital input Daisy-chain data input. DOUT1 20 Digital output DOUT1 is TDM data output (TDM mode). DOUT2 19 Digital output DOUT3 18 Digital output ADS1278: DOUT[8:1] Data output for channels 8 through 1. DOUT4 17 Digital output DOUT5 16 Digital output ADS1274: DOUT[8:5] Internally connected to active circuitry; outputs are driven. DOUT6 15 Digital output DOUT[4:1] Data output for channels 4 through 1. DOUT7 14 Digital output DOUT8 13 Digital output DRDY/ 29 Digital input/output Frame-Sync protocol: frame clock input; SPI protocol: data ready output. FSYNC DVDD 26 Digital power supply Digital core power supply. FORMAT0 32 Digital input FORMAT[2:0] Selects Frame-Sync/SPI protocol, TDM/discrete data outputs, FORMAT1 31 Digital input fixed/dynamic position TDM data, and modulator mode/normal operating mode. FORMAT2 30 Digital input IOVDD 22, 23 Digital power supply I/O power supply (+1.65V to +3.6V). MODE0 34 Digital input MODE[1:0] Selects High-Speed, High-Resolution, Low-Power, or Low-Speed mode operation. MODE1 33 Digital input PWDN1 42 Digital input PWDN2 41 Digital input PWDN3 40 Digital input ADS1278: PWDN[8:1] Power-down control for channels 8 through 1. PWDN4 39 Digital input PWDN5 38 Digital input ADS1274: PWDN[8:5] must = 0V. PWDN[4:1] Power-down control for channels 4 through 1. PWDN6 37 Digital input PWDN7 36 Digital input PWDN8 35 Digital input SCLK 28 Digital input/output Serial clock input, Modulator clock output. SYNC 11 Digital input Synchronize input (all channels). TEST0 8 Digital input TEST[1:0] Test mode select: 01 = Do not use 00 = Normal operation 10 = Do not use 11 = Test mode TEST1 9 Digital input © 2007–2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): ADS1274 ADS1278 |
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