TS9002 datasheet(8/11 Pages) TOUCHSTONE

부품명	TS9002

상세설명	Low-Power Single/Dual-Supply Dual Comparator with Reference

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제조업체	TOUCHSTONE [Touchstone Semiconductor Inc]

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TS9002

Page 8

TS9002DS r1p0

RTFDS

than 3µA. If the power dissipation of the package is

maintained within the max limit, the output can

source pulses of 100mA of current with V+ set to

+5V. In an effort to minimize external components

needed to address power supply feedback, the

TS9002 output does not produce crowbar switching

current as the output switches. At a power supply

voltage of 3V, the propagation delay of the TS9002

is 6

μs when the output switches from high-to-low

and low-to-high.

Voltage Reference

The TS9002 has an on-board +1.182V voltage

reference with an accuracy of ±0.75%. The REF pin

is able to source and sink

20μA and 10μA of current,

respectively. The REF pin is referenced to V- and it

should not be bypassed.

Noise Considerations

Noise can play a role in the overall performance of

the TS9002. Despite having a large gain, if the input

voltage is near or equal to the input offset voltage,

the output will randomly switch HIGH and LOW. As a

result, the TS9002 produces a peak-to-peak noise of

about 0.3mVPP while the reference voltage produces

a peak-to-peak noise of about 1mvPP. Furthermore,

it is important to design a layout that minimizes

capacitive coupling from a given output to the

reference pin as crosstalk can add noise and as a

result, degrade performance.

APPLICATIONS INFORMATION

Hysteresis

As a result of circuit noise or unintended parasitic

feedback, many analog comparators often break into

oscillation within their linear region of operation

especially when the applied differential input voltage

approaches 0V (zero volt). Externally-introduced

hysteresis

is

a

well-established

technique

to

stabilizing analog comparator behavior and requires

external components. As shown in Figure 1, adding

comparator hysteresis creates two trip points: VTHR

(for the rising input voltage) and VTHF (for the falling

input voltage). The hysteresis band (VHB) is defined

as the voltage difference between the two trip points.

When a comparator’s input voltages are equal,

hysteresis effectively forces one comparator input to

move quickly past the other input, moving the input

out of the region where oscillation occurs. Figure 1

illustrates the case in which an IN- input is a fixed

voltage and an IN+ is varied. If the input signals

were reversed, the figure would be the same with an

inverted output. Hysteresis can be generated with

two external resistors using positive feedback as

shown in Figure 2. Resistor R1 is connected

between REF and HYST and R2 is connected

between HYST and V-. This will increase the trip

point for the rising input voltage, VTHR, and decrease

the trip point for the falling input voltage, VTHF, by the

same amount. If no hysteresis is required, connect

HYST to REF. The hysteresis band, VHB, is voltage

across the REF and HYST pin multiplied by a factor

of 2. The HYST pin can accept a voltage between

REF and REF-50mV, where a voltage of REF-50mV

generates the maximum voltage across R1 and

thus, the maximum hysteresis and hysteresis band

of 50mV and 100mV, respectively. To design the

circuit for a desired hysteresis band, consider the

equations below to acquire the values for resistors

R1 and R2:

Figure 1. Threshold Hysteresis Band

Figure 2. Programming the HYST Pin

유사한 부품 번호 - TS9002

제조업체	부품명	데이터시트	상세설명
Taiwan Semiconductor Co...	TS9002	125Kb / 5P	300mA CMOS LDO with Enable & Power Good
Taiwan Semiconductor Co...	TS9002	219Kb / 5P	300mA CMOS LDO with Enable & Power Good
Silicon Laboratories	TS9002	1Mb / 12P	Low-Power Single/Dual-Supply Dual Comparator with Reference
Taiwan Semiconductor Co...	TS90021CX5	125Kb / 5P	300mA CMOS LDO with Enable & Power Good
Taiwan Semiconductor Co...	TS9002ACX5	125Kb / 5P	300mA CMOS LDO with Enable & Power Good

More results

유사한 설명 - TS9002

제조업체	부품명	데이터시트	상세설명
Silicon Laboratories	TS9002	1Mb / 12P	Low-Power Single/Dual-Supply Dual Comparator with Reference
Touchstone Semiconducto...	TS9004DB	1Mb / 12P	Low-Power Single/Dual-Supply Quad Comparator with Reference
Touchstone Semiconducto...	TS9004	979Kb / 12P	Low-Power Single/Dual-Supply Quad Comparator with Reference
Silicon Laboratories	TS9004	1Mb / 13P	Low-Power Single/Dual-Supply Quad Comparator with Reference
Linear Technology	LTC1440	258Kb / 16P	Ultralow Power Single/Dual Comparator with Reference
	LTC1442	258Kb / 16P	Ultralow Power Single/Dual Comparator with Reference
	LTC1441IS	258Kb / 16P	Ultralow Power Single/Dual Comparator with Reference
	LTC1441	258Kb / 16P	Ultralow Power Single/Dual Comparator with Reference
	LTC1440	248Kb / 16P	Ultralow Power Single/Dual Comparator with Reference
	LTC1440	268Kb / 12P	Ultralow Power Single/Dual Comparator with Reference

More results

TS9002 데이터시트(PDF) 8 Page - Touchstone Semiconductor Inc

TS9002 데이터시트(HTML) 8 Page - Touchstone Semiconductor Inc

유사한 부품 번호 - TS9002

유사한 설명 - TS9002

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