MM1217 [MITSUMI]

Monolithic IC; 单片IC


型号：	MM1217
厂家：	MITSUMI ELECTRONICS, CORP.
描述：	Monolithic IC 单片IC
文件：	总4页 (文件大小：117K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Flame Detection Amplifier MM1217

MITSUMI

Flame Detection Amplifier

Monolithic IC MM1217

Outline

This IC is comprised of an operation amplifier, a comparator, and a reference power source. It is worthy of

note that the input offset voltage and the input offset voltage temperature drift of this operation amplifier are

one digit less than those of conventional products regardless of the single power supply. Formerly, offset

voltage adjustment was required for flame detection using a thermocouple on gas appliances, but with this IC

adjustment is not required.

Due to the single power supply, low current consumption, and low offset voltage, two batteries can be used

for operation, making it appropriate for equipment that amplifies the very small signal of portable equipment.

Features

General

1. Power supply voltage (single batteries)

V^CC=1.8V~6V

(It is available to operate by two dry cell batteries.)

2. Current consumption

0.1mA typ.

60dB typ.

3. Power supply line elimination ratio

Amplifier section

1. Low input offset voltage

0.1mV typ.

1.0ꢀVꢁ°C typ.

1nA typ.

2. Low input offset voltage drift (

3. Input offset current

4. Input bias current

20°C~+75°C)

50nA typ.

5. Gain (Open roop)

100dB typ.

Comparator Section

1. Input offset voltage

2. Low input offset voltage drift (

3. Input bias current

1.0mV typ.

10ꢀVꢁ°C typ.

25nA typ.

4. Output sink current

5mA min.

Reference Voltage Section

1. Reference voltag

1.27V 0.05V

100ppmꢁ°C typ.

0.3mA min.

2. Reference voltage temperature characteristics

3. Output current

Package

SOP-8C (MM1217XF)

SIP-9A (MM1217XS)

Applications

1. Gas burners

2. Instantaneous gas water heaters

Flame Detection Amplifier MM1217

MITSUMI

Pin Assignment

MM1217XF

Pin Function

MM1217XS

AIN+

Pin No.

MM1217XF

A^IN+

A^IN

AIN-

AOUT

GND

AOUT

COMPIN+

GND

SOP 8C

COMP^IN

V^S

MM1217XS

COMPIN

COMPOUT

VCC

1 2 3 4 5 6 7 8 9

SIP-9A

COMPOUT

VCC

(SOP-8C)

Pin Function

Pin No.

Pin Function

Internal Equivalent Circuit Pin No.

Pin Function

Internal Equivalent Circuit

AIN+

COMPIN-

AIN

AOUT

COMPOUT

Flame Detection Amplifier MM1217

MITSUMI

Block Diagram

MM1217XF

MM1217XS

(Ta=25°C)

Absolute Maximum Ratings

Item

Symbol

Specification

40~+125

Units

°C

Storage temperature

Operating temperature

Power supply voltage

Input voltage

T^STG

T^OPR

20~+75

0.3~+10

V^CCmax.

V^IN

MM1217XF

MM1217XS

300

470

Allowable power dissipation

(

Ta=25°C, VCC=3V, VIN=0V)

Unless otherwise specified

Electrical Characteristics

Item

Symbol

I^CC

Measurement Conditions

Min. Typ. Max. Units

Current consumption

0.1 0.15 mA

Reference voltage output current

Reference voltage

I^OVS1

V^S1

0.3

1.22 1.27 1.32

100

ppm/°C

Reference voltage temperature drift

Power supply line elimination ratio

Power supply voltage range

Input voltage range

V^S1

PSRR

V^CC

f=100Hz

1.8

3.0

6.0

0.3

V^I

-0.2

Input offset voltage

V^IOA

0.1 0.35 mV

Input offset voltage

V^IOA

1.0

3.0 µV/°C

temperature drift

Amplifier

Input offset current

IIOA

I^BA

G^V

I^OA

Input bias current

Gain

150

section

RL=100kΩ

100

Output current

VIN=10mV, VO1=0.5V

0.5

VIN=

5~25mV

VCC

Output voltage

V^OA

0.01

RL=10kΩ

-1.0

Flame Detection Amplifier MM1217

MITSUMI

(Ta=25°C, V^CC=3V, VIN=0V)

Unless otherwise specified

Electrical Characteristics

Item

Symbol

Measurement Conditions

Min. Typ. Max. Units

Input offset voltage

V^IOC

VIN=

5mV

±±1. ±ꢀ15 mV

V^IOC

±±. ±ꢀ. µV/°C

temperature drift

Comparator

Input bias current

IBC

I^SINK

I^LC

µA

Section

Output sink current

VIN=±.mV, VO2=.14V

VO2=VCC+±V

Output leak current

.12

Output saturation voltage

I^SAT

VIN=±.mV, ISINK=5mA

2.. 4.. mV

Note 1 : Amplifier output ··· emitter-follower (pull-down resistance 22kΩ)

Note 2 : Comparator output ··· open collector

Application Circuits

Flame detection circuit using a thermocouple (single power source)

Note : Use a gain range of 20dB-50dB in the amplifier section (40dB recommended) .

Also, insert the capacitor between output 3 and GND instead of parallel to R2 in order to eliminate noise

from the input. Please note that use of the equipment under different conditions will cause vibration.

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