1720 查看數據表（PDF） - Linear Technology

零件编号

产品描述 (功能)

生产厂家

1720

Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs

Linear Technology 

LT1720/LT1721

TEST CIRCUITS

15VP-P

BANDWIDTH-LIMITED

TRIANGLE WAVE

~ 1kHz

VCC

0.1µF

50k

+

50Ω

50Ω

–

200k

DUT

1/2 LT1720 OR

VCM

1/4 LT1721

±VTRIP Test Circuit

LTC203

14

15

3

2

10nF

16

1

9

8

11

10

6

7

1000 × VTRIP+

1µF

10k

1/2 LT1112

–+

1000 × VHYST

LTC203

1/2 LT1638

+

100k

100k

–

100k

+

2.4k

–

100k

1/2 LT1638

3

1

8

0.15µF

6

NOTES: LT1638, LT1112, LTC203s ARE POWERED FROM ±15V.

200kΩ PULL-DOWN PROTECTS LTC203 LOGIC INPUTS

WHEN DUT IS NOT POWERED

1000 × VOS

10k

2

14

15

10nF

1µF

16

9

7

11

10

1720/21 TC01

1/2 LT1112

–+

1000 × VTRIP–

Response Time Test Circuit

0V

0.1µF

130Ω

–100mV

DUT

1/2 LT1720 OR

1/4 LT1721

25Ω

25Ω

50k

V1* 50Ω

+VCC – VCM

+

0.01µF

–

0.01µF

10 × SCOPE PROBE

(CIN ≈ 10pF)

PULSE

2N3866

0V

IN

1N5711

–3V

–VCM

50Ω

400Ω 750Ω

*V1 = –1000 • (OVERDRIVE + VTRIP+)

NOTE: RISING EDGE TEST SHOWN.

– 5V

FOR FALLING EDGE, REVERSE LT1720 INPUTS

1720/21 TC02

6

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