LTC1042 查看數據表（PDF） - Linear Technology

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LTC1042

Window Comparator

Linear Technology 

LTC1042

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C.

SYMBOL

REXT

PARAMETER

External Timing Resistor

fS

Sampling Frequency

TEST CONDITIONS

Resistor connected between V+

and OSC Pin

V+ = 5V, TA = 25°C

REXT =1MΩ, CEXT = 0.1µF

MIN TYP MAX

● 100

10,000

5

UNITS

kΩ

Hz

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: Applies over input voltage range limit and includes gain

uncertainty.

Note 3: Center error = [(VU +VL)/2 – CENTER] (where VU = upper band

limit and VL = lower band limit).

Note 4: Width error = (VU –VL – 2 • WIDTH/2) (where VU = upper band

limit and VL = lower band limit).

Note 5: RIN is guaranteed by design and is not tested. RIN = 1/(fS x 66pF).

Note 6: Average supply current = TD • lS(ON) • fS + (1 –TD fS) IS(OFF).

Note 7: Response time is set by an internal oscillator and is independent

of overdrive voltage. TD is guaranteed by correlation test and is not directly

measured.

TYPICAL PERFOR A CE CHARACTERISTICS

IS(ON) vs V+

20

18

16

14

12

25°C

10

–55°C

8

6

4

125°C

2

0

2 4 6 8 10 12 14 16

SUPPLY VOLTAGE, V+ (V)

LTC1042 • TPC01

Response Time vs Supply Voltage

110

TA = 25°C

100

90

80

70

60

50

2

4 6 8 10 12 14 16

SUPPLY VOLTAGE, V+ (V)

LTC1042 • TPC04

Normalized Sampling Frequency

vs V+, Temperature

2.2

R = 1M, C = 0.1µF

2.0

1.8

TA = 125°C

1.6

1.4

1.2

1.0 TA = 25°C

0.8

TA = – 55°C

0.6

0 2 4 6 8 10 12 14 16

SUPPLY VOLTAGE, V+ (V)

LTC1042 • TPC02

Response Time vs Temperature

130

V+ = 5V

120

110

100

90

80

70

60

50

40

–50

–25 0 25 50 75 100 125

AMBIENT TEMPERATURE, TA (°C)

LTC1042 • TPC05

Sampling Rate vs REXT CEXT

103

CEXT = 1000pF

102

CEXT = 0.01µF

10

1

0.1

100k

CEXT = 0.1µF

CEXT = 1µF

CEXT = 0.05µF

1M

REXT (Ω)

10M

LTC1042 • TPC03

RIN vs Sampling Frequency

1011

1010

109

108

107

1

10

102

103

104

SAMPLING FREQUENCY, fS (Hz)

LTC1042 • TPC06

1042fa

3

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