R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 1075

Manufacturer Part Number

R0K572030S000BE

KIT DEV FOR SH7203

Manufacturer

Renesas Electronics America

Renesas Starter Kits (RSK)r

CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM

Silicon Manufacturer

Kit Contents

Silicon Family Name

Silicon Core Number

R5S72030W200FP

Tool / Board Applications

General Purpose MCU, MPU, DSP, DSC

Mcu Supported Families

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

For Use With/related Products

Lead Free Status / Rohs Status

Table 20.7 Analog Input Pin Ratings

This LSI's analog input is designed such that conversion precision is guaranteed for an input signal

for which the signal source impedance is 5 kΩ or less. This specification is provided to enable the

A/D converter's sample-and-hold circuit input capacitance to be charged within the sampling time;

if the sensor output impedance exceeds 5 kΩ, charging may be insufficient and it may not be

possible to guarantee A/D conversion precision. However, for A/D conversion in single mode with

a large capacitance provided externally for A/D conversion in single mode, the input load will

essentially comprise only the internal input resistance of 3 kΩ, and the signal source impedance is

ignored. However, as a low-pass filter effect is obtained in this case, it may not be possible to

follow an analog signal with a large differential coefficient (e.g., 5 mV/μs or greater) (see

figure 20.10). When converting a high-speed analog signal, a low-impedance buffer should be

Analog input capacitance

Allowable signal-source impedance

Permissible Signal Source Impedance

Note: Values are reference values.

Figure 20.9 Analog Input Pin Equivalent Circuit

Rev. 3.00 Sep. 28, 2009 Page 1043 of 1650

To A/D converter

Section 20 A/D Converter (ADC)

REJ09B0313-0300