TS9004ISN16T datasheet(11/12 Pages) TOUCHSTONE

Teilenummer	TS9004ISN16T

Bauteilbeschribung	Low-Power Single/Dual-Supply Quad Comparator with Reference

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Hersteller	TOUCHSTONE [Touchstone Semiconductor Inc]

Direct Link	http://www.touchstonesemi.com

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TS9004

TS9004DS r1p0

Page 11

RTFDS

Bar-Graph Level Gauge

A simple four-stage level detector is shown in

Figure 3 using the TS9004. Due to its high output

source capability, the TS9004 is perfect for driving

LEDs. When all of the LEDs are on, the threshold

voltage is given as VIN = (R1 + R2)/R1 volts. All

other

threshold

voltages

are

scaled

down

accordingly by ¾, ½, and ¼ the threshold voltage.

The current through the LEDs is limited by the

output resistors.

Level Shifter

Figure 4 provides a simple way to shift from bipolar

±5V inputs to TTL signals by using the TS9004. To

protect the comparator inputs,

10 Ω resistors are

placed in series and do not have an effect on the

performance of the circuit.

Figure 3. Bar-Graph Level Gauge

Figure 4. Level Shifter: ±5V Input into CMOS output

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