ald114935sa Advanced Linear Devices Inc (ALD), ald114935sa Datasheet

ald114935sa

Manufacturer Part Number

ald114935sa

Description

Quad/dual N-channel Depletion Mode Epad Matched Pair Mosfet Arrays

Manufacturer

Advanced Linear Devices Inc (ALD)

Datasheet

1.ALD114935SA.pdf (2 pages)

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GENERAL DESCRIPTION

ALD114835/ALD114935 are monolithic quad/dual N-Channel MOSFETs

matched at the factory using ALD’s proven EPAD CMOS technology. These

devices are intended for low voltage, small signal applications. They are excel-

lent functional replacements for normally-closed relay applications, as they are

normally on (conducting) without any power applied, but could be turned off or

modulated when system power supply is turned on. These MOSFETs have the

unique characteristics of, when the gate is grounded, operating in the resis-

tance mode for low drain voltage levels and in the current source mode for

higher voltage levels and providing a constant drain current.

ALD114835/ALD114935 MOSFETs are designed for exceptional device elec-

trical characteristics matching. As these devices are on the same monolithic

chip, they also exhibit excellent temperature tracking characteristics. They are

versatile as design components for a broad range of analog applications such

as basic building blocks for current sources, differential amplifier input stages,

transmission gates, and multiplexer applications. Besides matched pair electri-

cal characteristics, each individual MOSFET also exhibits well controlled pa-

rameters, enabling the user to depend on tight design limits. Even units from

different batches and different date of manufacture have correspondingly well

matched characteristics.

These depletion mode devices are built for minimum offset voltage and differ-

ential thermal response, and they are designed for switching and amplifying

applications in single 5V to +/-5V systems where low input bias current, low

input capacitance and fast switching speed are desired. These devices exhibit

well controlled turn-off and sub-threshold charactersitics and therefore can be

used in designs that depend on sub-threshold characteristics.

The ALD114835/ALD114935 are suitable for use in precision applications which

require very high current gain, beta, such as current mirrors and current sources.

A sample calculation of the DC current gain at a drain current of 3mA and gate

input leakage current of 30pA = 100,000,000. It is recommended that the user,

for most applications, connect V+ pin to the most positive voltage potential (or

left open unused) and V- and N/C pins to the most negative voltage potential

in the system. All other pins must have voltages within these voltage limits.

FEATURES

• Depletion mode (normally ON)

• Precision Gate Threshold Voltages: -3.50V +/- 0.05V

• Nominal R

• Matched MOSFET to MOSFET characteristics

• Tight lot to lot parametric control

• Low input capacitance

• V

• High input impedance — 10

• Positive, zero, and negative V

• DC current gain >10

• Low input and output leakage currents

ORDERING INFORMATION

* Contact factory for industrial temp. range or user-specified threshold voltage values

ALD114835PC

GS(th)

16-Pin

Plastic Dip

Package

match (V

0°C to +70°C

DS(ON)

INEAR

DVANCED

EVICES,

ALD114835SC

@ V

Operating Temperature Range*

) — 20mV

16-Pin

SOIC

Package

=0.0V of 540Ω

NC.

QUAD/DUAL N-CHANNEL DEPLETION MODE EPAD®

Ω typical

GS(th)

ALD114935PA

temperature coefficient

8-Pin

Plastic Dip

Package

MATCHED PAIR MOSFET ARRAYS

0°C to +70°C

ALD114935SA

SOIC

Package

8-Pin

www.aldinc.com

APPLICATIONS

• Functional replacement of Form B (NC) relay

• Zero power fail safe circuits

• Backup battery circuits

• Power failure detector

• Fail safe signal detector

• Source followers and buffers

• Precision current mirrors

• Precision current sources

• Capacitives probes

• Sensor interfaces

• Charge detectors

• Charge integrators

• Differential amplifier input stage

• High side switches

• Peak detectors

• Sample and Hold

• Alarm systems

• Current multipliers

• Analog switches

• Analog multiplexers

• Voltage comparators

• Level shifters

PIN CONFIGURATION

N/C*

*N/C pins are internally connected.

Connect to V- to reduce noise

V -

PA, SA PACKAGES

PC, SC PACKAGES

ALD114835/ALD114935

M 1

M 4

ALD114935

ALD114835

M 1

M 3

M 2

V -

GS(th)

N/C*

V -

= -3.5V

EPAD

Related parts for ald114935sa

ald114935sa Summary of contents

Page 1

... Plastic Dip SOIC Package Package ALD114935PA ALD114935SA www.aldinc.com ALD114835/ALD114935 APPLICATIONS • Functional replacement of Form B (NC) relay • Zero power fail safe circuits • Backup battery circuits • Power failure detector • Fail safe signal detector • ...

Page 2

ABSOLUTE MAXIMUM RATINGS Drain-Source voltage Gate-Source voltage Power dissipation Operating temperature range PA, SA, PC, SC package Storage temperature range Lead temperature, 10 seconds OPERATING ELECTRICAL CHARACTERISTICS V+ = +5V (or open -5V CAUTION: ...

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