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CDB5512 Folha de dados(PDF) 3 Page - Cirrus Logic |
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CDB5512 Folha de dados(HTML) 3 Page - Cirrus Logic |
3 / 22 page CDB5510/11/12/13 DS337DB2 3 1. HARDWARE 1.1 Introduction The CDB5510/11/12/13 evaluation system pro- vides a quick means of testing the CS5510/11/12/13 Analog-to-Digital Converters (ADCs). The CDB5510 evaluation board accepts any of the four converters via an 8-pin SOIC sock- et, and interfaces directly to a PC running though an RS-232 serial interface. The included analysis software allows the user to control the various functions of the CS5510/11/12/13, as well as capture and save data. The software also provides data analysis tools to display the time domain, frequency domain, and noise histogram performance for a captured set of data. 1.2 Power Supply Options The CS5510/11/12/13 ADCs are designed to oper- ate from a supply voltage difference of 5 to 6 V be- tween V+ and V-. The parts may be run from a single 5 V supply, or any combination of voltages that produce a 5 V span, such as +3 V and -2 V or ± 2.5 V. The CDB5510 evaluation board supports both single and dual supply configurations. For a single supply, both the V- and GND posts should be connected to 0 V, and the V+ post should be connected to the positive supply voltage. For dual supply configurations, the GND post should be connected to 0 V, the positive supply should be connected to the V+ post, and the negative supply should be connected to the V- post. Because the RS-232 transceiver used on the board requires at least 3 V for its supply voltage, it is recommended that the V+ post always be at least 3 V for proper operation of the evaluation board. If a different mi- crocontroller is interfaced to the CS5510/11/12/13 through HDR6, other supply voltages may be used. 1.3 Analog Inputs Analog input signals can be connected to the con- verter’s inputs via the CDB5510’s AIN+ and AIN- inputs (connector J3). Note that a simple RC net- work filters the input to reduce broadband noise. Both of the analog inputs can also be tied to the V- supply by changing the position of HDR4 and HDR5, or to the output of the amplifier section as shown in Table 1. For a differential input the jump- ers should be set to the “Direct Differential Input” setting, and for a single-ended input on AIN+, the jumpers should be set to the “Direct Single-Ended Input” setting. The jumpers can also be set to con- figure an amplifier input, if it is installed on the evaluation board. The amplifier section of the board is discussed in more detail in section 1.7. 1.4 Voltage Reference Options The evaluation system provides three voltage refer- ence options. The VREF pin can be connected to the on-board 2.5V reference, to the positive supply rail, or to an external voltage reference source via HDR3, as shown in Table 2. When the HDR3 jumper on the CDB5510 is in the”V+” position, the eval board’s supply voltage is selected. When this jumper is in the “LT1019” position, the on-board reference provides an absolute voltage level of 2.5 volts (the LT1019 was chosen for its low drift, typ- Input HDR4 HDR5 Direct Differential Input Direct Single-Ended Input Differential Amplifier Input Single-Ended Amplifier Input Table 1. Analog Input Selection With HDR4 and HDR5 OO AIN+ OO AIN+ OO AIN+ AIN+ AMP+ V- OO AIN- OO AIN- OO AIN- AIN- AMP- V- OO AIN+ OO AIN+ OO AIN+ AIN+ AMP+ V- OO AIN- OO AIN- OO AIN- AIN- AMP- V- OO AIN+ OO AIN+ OO AIN+ AIN+ AMP+ V- OO AIN- OO AIN- OO AIN- AIN- AMP- V- OO AIN+ OO AIN+ OO AIN+ AIN+ AMP+ V- OO AIN- OO AIN- OO AIN- AIN- AMP- V- |
Nº de peça semelhante - CDB5512 |
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Descrição semelhante - CDB5512 |
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