MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide 75
UG257 (v1.1) December 5, 2007 www.xilinx.com
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Chapter 10
Analog Capture Circuit
The MicroBlaze Development Kit board includes a two-channel analog capture circuit,
consisting of aprogrammable scaling pre-amplifier and an analog-to-digital converter
(ADC), as shown in Figure 10-1. Analog inputs are supplied on the J7 header.
The analog capture circuit consists of a Linear Technology LTC6912-1 programmable pre-
amplifier that scales the incoming analog signal on header J7 (see Figure 10-2). The output
of pre-amplifier connects to a Linear Technology LTC1407A-1 ADC. Both the pre-amplifier
and the ADC are serially programmed or controlled by the FPGA.
Figure 10-1: Two-Channel Analog Capture Circuit
Linear Tech LTC6912 Dual A/D
SPI_MOSI: (T4)
SPI_MISO: (N10)
SPI_SCK: (U16)
DAC_CS: (N8)
DAC_CLR: (P8)
Spartan-3E
Development Board
UG257_04_01_061306
6-pin DAC
Header (J5)
Linear Tech LTC1407A-1 Dual A/D
SPI_SCK: (U16)
AD_CONV: (P11)
SPI_MISO: (N10)
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