Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.

Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.

MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION

• 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281

www.micropac.com

12/17/01

1

True Hermetically Sealed Proportionally Controlled

Metal Package Heater Hybrids

Mii

HYBRID MICROELECTRONICS

PRODUCTS DIVISION

Features:

•

Self-contained

•

Programmable via a single external resistor

•

Available in 28 watt and 48 watt versions

Standard products

Applications:

•

Ideal for microwave oscillators

•

Telecommunications

•

Other areas where temperature control is needed

DESCRIPTION

The Mii heater is a self-contained hybrid circuit heater programmable for temperature by a single external resistor. These

systems are ideal for microwave oscillators, telecommunications and other areas where temperature control is needed.

Metal package heaters are available in 28 watt and 40 watt versions..

Typical Electrical Characteristics for DC Metal Package Heater

Mii P/N 52280-2 …………………………………………………………….……………………….……..…. 28 VDC Input, 28 Watts

Mii P/N 52280-1 …………………………………………………………….…………………………...……. 28 VDC Input, 40 Watts

Operating Voltage Range (See Note 1) ………………………………………………………………………..…………. 28± 1 VDC

Voltage Limits ……………………………………………………………………………………………... 24 VDC Min, 32 VDC Max

Reverse Voltage Protection …………………………………………………………………………..………….………… to 50 VDC

Operating Current Range ………………………………………………………………….…………………..……… 0.005 to 1.00 A

Turn-on Current ………………………………………………………………………………………….…….……………… to 1.00 A

Quiescent Current ……………………………………………………………………………………………..…….. Less than .005 A

Typical Temperature Characteristics

Control Range …………………………………………………………………………………………..……………. +50°C to +100°C

Variation with Load (See Note 2) ……………………………………………………………………………………...…… 10° C Max

Input Voltage Variation (See Note 3) ……………………………………………………...…………………….…..…………… ±2°C

Maximum Control Temperature (See Note 4) ………………………………………………………………….…………….. +120°C

Environmental Characteristics

Operating Temperature ………………………………………………………………………………………….…… -55°C to +100°C

Altitude ……………………………………………………………………………………………………………….….. 70,000 Ft. Max

Shock ………………………………………………………………………………………………………………….……… 200G Max

Vibration ………………………………………………………………………………………………….………. 50G at 2,000 Hz Max

Humidity ……………………………………………………………………………………………………………… Greater than 95%