LT1782HS6(RevA) データシートの表示（PDF） - Linear Technology

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LT1782HS6
(Rev.:RevA)

Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp

Linear Technology 

LT1782

APPLICATIO S I FOR ATIO

typically 100dB. When the LT1782 switches between

input stages, there is significant nonlinearity in the CMRR.

Lower load resistance increases the output crossover

distortion but has no effect on the input stage transition

distortion. For lowest distortion, the LT1782 should be

operated single supply, with the output always sourcing

current and with the input voltage swing between ground

and (V+ – 0.8V). See the Typical Performance Character-

istics curves, “Total Harmonic Distortion + Noise vs Ouput

Voltage Amplitude.”

Gain

The open-loop gain is almost independent of load when

the output is sourcing current. This optimizes perfor-

mance in single supply applications where the load is

returned to ground. The typical performance curve of

open-loop gain for various loads shows the details.

Shutdown

The 6-lead part includes a shutdown feature that disables

the part, reducing quiescent current and making the output

high impedance. The part can be shut down by bringing the

SHDN pin 1.2V or more above V –. When shut down, the

supply current is about 5µA and the output leakage current

is less than 1µA (V– ≤ VOUT ≤ V+). In normal operation, the

SHDN pin can be tied to V – or left floating. See the Typical

Performance Characteristics curves, “Supply Current vs

Shutdown Pin Voltage.”

W

W

SI PLIFIED SCHE ATIC

SHDN

J1

Q26

Q1

R1

30k

R2

6k

Q4 – IN

+

2µA

R3

6k

+ IN

Q2

D1

Q7 Q8

Q11 Q12

Q9

Q10

Q13

Q3

D3

V+

Q22

Q15

Q14

Q19

Q17

Q20

OUT

Q16 Q18

Q21

Q25 Q23

Q24 Q5

Q6

D4 D5

R4

R5

40k

40k

V–

1782 SS

12

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