M62301SP Datasheet, PDF (1/12 Pages) Mitsubishi Electric Semiconductor – 10~12-BIT 4CH INTEGRATING A-D CONVERTER

M62301SP/FP
10 to 12-bit 4-ch Integrating A/D Converter
REJ03D0861-0300
Rev.3.00
Mar 25, 2008
Description
M62301 semiconductor integrated circuit forms an integrating A/D converter, being connected to a microcomputer unit.
By using selection signals and counter clock signals from the unit, a 10 to 12-bit A/D converter can be created at a low
cost.
The integration time and resolution can be set at the users option by changing external parameters. In addition, the
built-in circuit offset, delay time and temperature fluctuation are adjustable, enabling a wide range of applications.
M62301 has a 3 input decoder circuit, high-precision reference voltage (1.22 V) generator, current supply and
comparator for integration, and voltage-monitoring reset circuit for a 5 V power supply. It is also equipped with
girdling to prevent current leak from integration capacitor.
Features
• Separate power supplies for analog section and digital section.
• Low power dissipation: 2 mA (Typ)
(1 mA for A/D conversion and the other 1 mA for reset)
• Linear error: ±0.02% (Typ)
• Conversion time: 526 µs/ch (Typ)
• Built-in system reset: 4.45 V (Typ)
Application
High-precision control systems such as temperature control and speed control
Block Diagram
A1 19
A2 18
A3 17
A4 16
Reference
input
15
A1
A2
A3
A4
V_REF
GND
Reference
voltage ¹³
V_REF
1.22 V
Constant
current control
12
Analog
V_CC
11
Analog Digital Digital
GND GND VDD
10
20
14
0.49 V
+
−
+
−
0.36 V
Discharge
Decoder
150 µs
+
Delay
−
circuit
5 INT
1
V_CC for
RESET
6 RESET
7
8
9
234
Guard Integrating Guard C0 C1 C2
ring 1 capacitor ring 2
REJ03D0861-0300 Rev.3.00 Mar 25, 2008
Page 1 of 11