MAX9107(2001) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX9107
(Rev.:2001)

25ns, Dual/Quad/Single, Low-Power, TTL Comparators

Maxim Integrated 

25ns, Dual/Quad/Single, Low-Power,

TTL Comparators

VTRIP+

VHYST

VTRIP-

VIN+

VOS

=

VTRIP+

+

2

VTRIP-

VIN- = 0

VOH

COMPARATOR

OUTPUT

VOL

Figure 1. Input and Output Waveforms, Noninverting Input

Varied

possible. Pay close attention to the decoupling capaci-

tor’s bandwidth, keeping leads short. Short lead

lengths on the inputs and outputs are also essential to

avoid unwanted parasitic feedback around the com-

parators. Solder the device directly to the printed circuit

board instead of using a socket.

Overdriving the Inputs

The inputs to the MAX9107/MAX9108/MAX9109 may be

driven to the voltage limits given in the Absolute

Maximum Ratings. If the inputs are overdriven, there is

no output phase reversal.

Battery-Operated Infrared Data Link

In Figure 3, the circuit allows reception of infrared data.

The MAX4400 converts the photodiode current to a

voltage, and the MAX9109 determines whether the

amplifier output is high enough to be called a “1.” The

current consumption of this circuit is minimal: the

MAX4400 and MAX9109 require typically 410µA and

350µA, respectively.

3V

LATCH

LE 1.4V

COMPARE

0

ts

th

VOS

DIFFERENTIAL

INPUT

VOLTAGE

VOH

OUTPUT 1.4V

VOL

VOD

VIN

tPD+

Figure 2. MAX9109 Timing Diagram

10pF

1MΩ

+5V

MAX4400

3

SIEMENS BP-104

PHOTODIODE 1

0.1µF

5

4

2

100kΩ

1000pF

47kΩ 100kΩ

+5V

1000pF

+5V

3

6

0.1µF

1

4

2

5 DATA

MAX9109

Figure 3. Battery-Operated Infrared Data Link Consumes Only

760µA

Chip Information

MAX9107 TRANSISTOR COUNT: 262

MAX9108 TRANSISTOR COUNT: 536

MAX9109 TRANSISTOR COUNT: 140

PROCESS: Bipolar

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