TC43 datasheet(3/6 Pages) TELCOM

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TC43

LINEAR BUILDING BLOCK –

VOLTAGE REFERENCE, DUAL OP AMP,

DUAL COMPARATOR WITH SHUTDOWN MODE

PRELIMINARY INFORMATION

ELECTRICAL CHARACTERISTICS: (Cont.) TA = Over Operating Temperature Range, VDD = 5.0V ±10%,

VSS = 0V, SHDN = VDD, unless otherwise specified.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Comparators (Cont.)

TDESEL

CMPTR1 Deselect time

—

µsec

(HI-Z from SHDN = VIL)

VIN

Differential Input Voltage Range

Both VINs > = VSS

——

VDD

VIN(CM)

Input Common Mode Voltage Range

Note 3, 5

VSS

—VDD

VOS

Input Offset Voltage

VCM = (VDD – VSS)/2

– 10

—

+10

mVDC

Input Bias Current

IN+ or IN–

—50

—

VOH

Output High Voltage

RL = 10kΩ to VSS,VDD – 0.3

—

1.8 < VDD < 5.5V

VOL

Output Low Voltage

RL = 10kΩ to VDD

—

0.3

1.8 < VDD < 5.5V

IOH

Output Source Current

VIN (+) = VDD, VIN (–) = VSS

1.3

(Continuous)

VDD = 1.8V, Output

Shorted to VSS

IOL

Output Sink Current

VIN (–) = VDD, VIN (+) = VSS

2.5

(Continuous)

VDD = 1.8V, Output

Shorted to VDD

tPD1

Response Time

100mV Overdrive (Note 4)

—15

—

µsec

tPD2

Response Time

10mV Overdrive (Note 4)

—

µsec

ROUT(SD)

Output Resistance in Shutdown

SHDN = VSS

—

Ω

COUT(SD)

Output Capacitance in Shutdown

SHDN = VSS (Note 5)

—

Voltage Reference

VREF

Reference Voltage

No Load

1.152

1.200

1.248

Load Regulation

0mA < ISOURCE < 5mA

—

– 300

—

µV/mA

VDD = 5V, TA = 25°C

CL(REF)

Load Capacitance

—

100

NVREF

Voltage Noise

100Hz to 100kHz

—

100

—

µVRMS

DETAILED DESCRIPTION

The TC43 is the first of a series of very low power, Linear

Building Block products targeted at low voltage, single

supply applications. The TC43 minimum operating voltage

is 1.8V and maximum supply current is only 15

µA (fully

enabled). It combines two comparators, two op amps and a

voltage reference in a single package. A shutdown mode is

incorporated for easy adaptation to system power manage-

ment schemes. During shutdown, all but one comparator

and the voltage reference are disabled (i.e. powered down

and with their respective outputs at high impedance). The

“still awake” comparator and voltage reference can be used

as wake-up timer, power supply monitor, LDO controller or

other continuous duty circuit function.

Operational Amplifiers

Both op amps have rail-to-rail outputs, and an input

common range that includes ground. Input offset voltage is

1.0mV and input bias current is only 50pA. The outputs are

protected against short circuits. Both op amps are disabled

(powered down and outputs at high impedance) during

shutdown.

Comparators

Both comparators feature complimentary outputs with

current sinking capability of 2.5mA. Inputs and outputs are

rail-to-rail. Comparator CMPTR1 is disabled (powered down

and outputs at high impedance) during shutdown. CMPTR2

remains fully enabled during shutdown.

NOTES: 1. The reference and one comparator remain active in SHUTDOWN mode.

2. Op Amp configured as a voltage follower (inverting input connected to output; signal applied to non-inverting input).

3. Input common-mode voltage should not be allowed to go negative by more than 0.3V.

4. V

DD = 5.0V; CL = 100pF.

5. Guaranteed by Design

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