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ADCS7477 Datasheet(PDF) 18 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # ADCS7477
Description  1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23
PDF  22 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

ADCS7477 Datasheet(HTML) 18 Page - National Semiconductor (TI)

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Applications Information (Continued)
the first SCLK edge after CS goes low is a rising edge, all
four leading zeroes will be valid on the first four falling edges
of SCLK. If instead the first SCLK edge after CS goes low is
a falling edge, the first leading zero may not be set up in time
for a microprocessor or DSP to read it correctly. The remain-
ing data bits are still clocked out on the falling edges of
SCLK.
3.0 ADCS7476/77/78 TRANSFER FUNCTION
The output format of the ADCS7476/77/78 is straight binary.
Code transitions occur midway between successive integer
LSB values. The LSB widths for the ADCS7476 is V
DD /
4096; for the ADCS7477 the LSB width is V
DD / 1024; for the
ADCS7478, the LSB width is V
DD / 256. The ideal transfer
characteristic for the ADCS7476 and ADCS7477 is shown in
Figure 6, while the ideal transfer characteristic for the
ADCS7478 is shown in Figure 7.
20057711
FIGURE 6. ADCS7476/77 Ideal Transfer Characteristic
20057712
FIGURE 7. ADCS7478 Ideal Transfer Characteristic
www.national.com
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