Datenblatt-Suchmaschine für elektronische Bauteile |
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LM49321 Datenblatt(PDF) 11 Page - Texas Instruments |
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LM49321 Datenblatt(HTML) 11 Page - Texas Instruments |
11 / 45 page ENB SCK SDI TSPISETENB TSPIHOLDD TSPISETD TSPICH TSPIT TSPICL TSPIHOLDENB Register Address Data ENB SCK SDI 7 0 7 0 LM49321, LM49321RLEVAL www.ti.com SNAS457C – SEPTEMBER 2008 – REVISED MAY 2013 Table 3. PSRR AVDD = 5.0V, fRIPPLE = 217Hz; VRIPPLE = 200mVP-P; CB = 2.2μF; All gains set to 0dB. MODE EP (Typ) LS (Typ) HP (Typ) Units 1 68 72 71 dB 2 68 72 71 dB 3 68 72 71 dB 4 68 66 69 dB 5 68 69 70 dB 6 69 72 71 dB 7 68 69 70 dB Table 4. Dynamic Range and SNR. 3.0V ≤ AVDD ≤ 5.0V. All programmable gain set to 0dB. Units in dB. DR (Typ) SNR (Typ) Units LS 95 85 dB HP 95 85 dB EP 97 85 dB System Control The LM49321 is controlled via either a two wire I2C compatible interface or three wire SPI interface, selectable with the MODE pin. This interface is used to configure the operating mode, interfaces, data converters, mixers and amplifiers. The LM49321 is controlled by writing 8 bit data into a series of write-only registers, the device is always a slave for both type of interfaces. THREE WIRE, SPI INTERFACE (MODE = 1) Three Wire Mode Write Bus Transaction Three Wire Mode Write Bus Timing Figure 4. Three Wire Mode Write Bus When the part is configured as an SPI device and the enable (ENB) line is lowered the serial data on SDI is clocked in on the rising edge of the SCK line. The protocol used is 16bit, MSB first. The upper 8 bits (15:8) are used to select an address within the device, the lower 8 bits (7:0) contain the updated data for this register. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM49321 LM49321RLEVAL |
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