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CS5372-BS Datasheet(PDF) 7 Page - Cirrus Logic |
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CS5372-BS Datasheet(HTML) 7 Page - Cirrus Logic |
7 / 22 page CS5371 CS5372 DS255F3 7 2. GENERAL DESCRIPTION. The CS5371 and CS5372 are one- and two- chan- nel fourth-order ∆Σ modulators, optimized for ex- tremely high-resolution measurement of signals between DC and 1600 Hz. They are designed to be used with the CS5376A and CS5378 low-power digital filters. Figure 3 on page 8 shows a four- channel system connection diagram for two CS5372 and one CS5376A. High Performance The CS5371/72 modulators have exceptional per- formance characteristics. Modulator dynamic range (SNR) is 127 dB over a 215 Hz bandwidth (2 ms sampling), with total harmonic distortion (THD) of -118 dB. Low Power Consumption The CS5371/72 modulators have very low power consumption. Power consumption is only 25 mW per channel in normal mode (LPWR=0, MCLK=2.048 MHz), and 15 mW per channel in low power mode (LPWR=1, MCLK=1.024 MHz). An independently selectable power-down mode (PWDN=1) can be used to disable a modulator and reduces its power consumption to 1 mW. If MCLK is then halted (MCLK=0), the modulator enters a micropower state using only 10 µW per channel. Small Package Size The CS5371/72 modulators are available in a very small 24-pin SSOP package approximately 8 mm x 8 mm in size. The CS5372 has two mod- ulator channels per package to increase board lay- out density even further. Multi-channel System Support Combining the CS5371 and CS5372 modulators with a digital filter permits multiple system configu- rations: 1 Channel - CS5371, CS5378 2 Channel - CS5372, CS5376A 3 Channel - CS5371, CS5372, CS5376A 4 Channel - CS5372, CS5372, CS5376A Differential Analog Signal Inputs The CS5371/72 modulators have fully differential analog inputs capable of measuring signals up to 5.0 V peak-to-peak when using a 2.5 V voltage ref- erence. The inputs will tolerate a 5% over-range voltage and continue operating at full specification. Digital Filter Interface The CS5371/72 modulators are designed to oper- ate with the CS5376A and CS5378 digital filters. The digital filter generates the modulator clock and synchronization signal inputs (MCLK and MSYNC), while receiving the modulator data and over-range flag outputs (MDATA and MFLAG). The modulators produce an oversampled ∆Σ serial bit stream at 512 kbits per second when operated from a 2.048 MHz modulator clock. Multiple Power Supply Configurations The CS5371/72 modulators support flexible power supply configurations. They can run from single or dual supplies in the following configurations: VA+ = +5V; VA- = 0V; VD = +3.3V to +5V VA+ = +2.5V; VA- = -2.5V; VD = +3.3V |
Número de pieza similar - CS5372-BS |
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Descripción similar - CS5372-BS |
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