MB40C218 Datasheet, PDF (3/11 Pages) Fujitsu Component Limited. – 30MHz 8-bit A/D Converter (With AMP)

MB40C218
s DESCRIPTION OF PINS
Pin No.
26
21
17
2, 3, 7, 28, 31
8
9 to 16
18
29
23
22
1
25
27
30
4
5
32
19
6, 20, 24
Symbol
Description
AVDD5 Analog section power supply (+ 5.00 V)
AVDD3 A/D converter analog power supply (+ 3 V)
DVDD A/D converter digital power supply (+ 3 V)
AVSS Analog power supply ground pin (0 V)
DVSS Digital power supply ground pin (0 V)
D7 to D0 Digital output pin
CLK Clock input pin
ADIN
A/D converter analog input pin.
Input range is VRB to VRT (0 to 1.5 V)
Relationship between analog input and digital output is defined by Test function.
VRTC
Input pin for reference voltage adjustment amp (VRT reference voltage adjustment)
VRT is adjusted so that it is 1.5 V with the input pin opened.
VRT
Reference voltage output pin on top side.
The voltage fed to VRTC is output.
VRB Reference voltage input pin on bottom side (0V)
VIN1 Input pin 1 for 1:3 gain amp
VIN2 Input pin 2 for 1:3 gain amp
Dual input selector for inverting amp
OPO Input pin for 1:3 gain (at standby: high impedance)
SEL
Toggle input pin for dual input selector for 1:3 gain amp
Input "L": VIN1, Input "H": VIN2
Input pin for toggling standby function.
CE
Input high signal brings the standby state to the A/D
converter, 1:3 gain amp, and reference voltage adjustment
amp.
Test function
Output (D7 to D0) enable input pin.
OE Input low signal readies digital output.
Input high signal induces high-impedance state.
TEST Test input pin.
N.C. No connection pins
The values in parentheses are standard.
s PRECAUTIONS ON USE
Be sure to ground the pins of AVDD5, AVDD3, DVDD and VRT via high-frequency capacitor.
Place the high-frequency capacitor as close as possible to the pin.
You can minimize the power supply current dissipation due to the internal logic indetermination by making CE
to high on power turning on.
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