LT1881(RevA) 查看數據表（PDF） - Linear Technology

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LT1881
(Rev.:RevA)

Dual and Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps

Linear Technology 

LT1881/LT1882

ELECTRICAL CHARACTERISTICS

The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

Split supply operation VS = ±15V, VCM = 0V unless otherwise noted. (Note 5)

SYMBOL

SR –

PARAMETER

Slew Rate Negative

CONDITIONS

AV = – 1

FPBW

ΔVOS

ΔIB+

ΔCMRR

Δ+PSRR

Δ –PSRR

Full-Power Bandwidth

Offset Voltage Match (LT1881/LT1882)

Offset Voltage Match (LT1881A)

Offset Voltage Match Drift

Noninverting Bias Current Match

(LT1881/LT1882)

Noninverting Bias Current Match

(LT1881A)

Common Mode Rejection Match

Positive Power Supply Rejection Match

Negative Power Supply Rejection Match

VOUT = 28VP-P

(Note 10)

(Note 5)

0°C < TA < 70°C

– 40°C < TA < 85°C

0°C < TA < 70°C

– 40°C < TA < 85°C

(Notes 6, 7)

(Notes 7, 8)

0°C < TA < 70°C

– 40°C < TA < 85°C

0°C < TA < 70°C

– 40°C < TA < 85°C

(Notes 7, 9)

V– = – 15V, VCM = 0V,

1.5V < V+ < 18V, (Notes 7, 9)

V+ = 15V, VCM = 0V,

– 1.5V < V– < – 18V, (Notes 7, 9)

MIN

TYP

MAX

UNITS

0.13

0.20

V/μs

●

0.1

V/μs

1.47

2.25

kHz

●

1.13

kHz

42

125

μV

●

175

μV

●

235

μV

35

70

μV

●

125

μV

●

160

μV

●

0.4

1.1

μV/°C

240

700

pA

●

900

pA

●

1000

pA

200

300

pA

●

400

pA

●

500

pA

●

110

125

dB

●

108

130

dB

●

104

130

dB

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The inputs are protected by internal resistors and back-to-back

diodes. If the differential input voltage exceeds ±0.7V, the input current

should be limited externally to less than 10mA.

Note 3: A heat sink may be required to keep the junction temperature

below absolute maximum.

Note 4: The LT1881C, LT1882C, LT1881I and LT1882I are guaranteed

functional over the operating temperature range of – 40°C to 85°C.

Note 5: The LT1881C and LT1882C are designed, characterized and

expected to meet specified performance from – 40°C to 85°C but are not

tested or QA sampled at these temperatures. The LT1881I and LT1882I are

guaranteed to meet specified performance from – 40°C to 85°C.

Note 6: This parameter is not 100% tested.

Note 7: Matching parameters are the difference between amplifiers

A and B in the LT1881; and between amplifiers A and D and B and C in the

LT1882.

Note 8: This parameter is the difference between the two noninverting

input bias currents.

Note 9: ΔCMRR and ΔPSRR are defined as follows: CMRR and PSRR are

measured in μV/V on each amplifier. The difference is calculated in μV/V

and then converted to dB.

Note 10: Full power bandwidth is calculated from the slew rate: FPBW =

SR/2πVP.

18812fa

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