MAC7200 datasheet(962/976 Pages) FREESCALE

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Analog-to-Digital Converter Characteristics

MAC7200 Microcontroller Family Reference Manual, Rev. 2

884

Freescale Semiconductor

Figure A-12. Read Bus Cycle Terminated by TA

A.16

Analog-to-Digital Converter Characteristics

Table A-29 shows conditions under which the ATD operates. The following constraints exist to obtain

full-scale, full range results: VSSA ≤ VRL ≤ VIN ≤ VRH ≤ VDDA. This constraint exists because the sample

buffer amplifier cannot drive beyond the ATD power supply levels. If the input level VIN goes outside of

this range it will effectively be clipped.

Table A-29. ATD Electrical Characteristics (Operating)1

Num

Rating

Symbol

Min

Typ

Max

Unit

D Analog Reference Low Voltage

VRL

VSSA - 0.1

—

VSSA + 0.1

D VRH Differential Voltage

VRL - VSSA-100

—

100

D Analog Reference High Voltage

VRH

VDDA - 0.1

—

VDDA + 0.1

D VREF Differential Voltage

VRH – VRL

4.5

—

5.25

D Analog Input Voltage

VIN

VSSA - 0.3

—

VDDA + 0.3

CLKOUT

CSn

ADDR[21:0]

R/W

BS[1:0]

DATA[15:0]

U6a

U7b

U7a

U6c

U6b

U2a

U3a

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