HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 865
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
(1036 pages)
- Current page: 865 of 1036
- Download datasheet (5Mb)
21.6
When using the A/D converter, note the following points.
21.6.1
Permanent damage to the LSI may result if the following voltage ranges are exceeded.
1. Analog input range: During A/D conversion, voltages on the analog input pins ANn should not
2. AVcc and AVss input voltages: Input voltages AVcc and AVss should be VccQ − 0.2 V ≤
21.6.2
To prevent damage from voltage surges at the analog input pins (AN0 to AN7), connect an input
protection circuit like the one shown in figure 21.7. The circuit shown also includes an RC filter to
suppress noise. This circuit is shown as an example; the circuit constants should be selected
according to actual application conditions. Section 25.4, A/D Converter Characteristics in section
25, Electrical Characteristics shows the analog input pin specifications and figure 21.8 shows an
equivalent circuit diagram of the analog input ports.
21.6.3
This LSI's analog input is designed such that conversion precision is guaranteed for an input signal
for which the signal source impedance is 5kΩ 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 5kΩ, 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 3kΩ, 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., 5mV/µs or greater) (see
figure 21.9). When converting a high-speed analog signal, a low-impedance buffer should be
inserted.
go beyond the following range: AVss ≤ ANn ≤ AVcc (n = 0 to 7).
AVcc ≤ VccQ and AVss = Vss. Do not leave the AVcc and AVss pins open when the A/D
converter is not in use and during periods in standby mode; in these situations, connect AVcc
to the power supply (VccQ) and AVss to the ground (VssQ).
Usage Notes
Setting Analog Input Voltage
Processing of Analog Input Pins
Permissible Signal Source Impedance
Rev. 4.00 Sep. 14, 2005 Page 815 of 982
Section 21 A/D Converter
REJ09B0023-0400
Related parts for HD6417641
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet: