LT1468CS8-TRPBF datasheet, PDF

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LT1468CS8-TRPBF: Description90MHz, 22V/μs 16-Bit Accurate Operational Amplifi er; File Size214KB，16 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LT1468CS8-TRPBF Overview

90MHz, 22V/μs 16-Bit Accurate Operational Amplifi er

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FEATURES

LT1468

90MHz, 22V/µs

16-Bit Accurate

Operational Ampliﬁer

DESCRIPTION

The LT

1468 is a precision high speed operational ampliﬁer

with 16-bit accuracy and 900ns settling to 150μV for 10V

signals. This unique blend of precision and AC performance

makes the LT1468 the optimum choice for high accuracy

applications such as DAC current-to-voltage conversion

and ADC buffers. The initial accuracy and drift character-

istics of the input offset voltage and inverting input bias

current are tailored for inverting applications.

The 90MHz gain bandwidth ensures high open-loop gain

at frequency for reducing distortion. In noninverting ap-

plications such as an ADC buffer, the low distortion and

DC accuracy allow full 16-bit AC and DC performance.

The 22V/μs slew rate of the LT1468 improves large-signal

performance in applications such as active ﬁlters and

instrumentation ampliﬁers compared to other precision

op amps.

The LT1468 is manufactured on a complementary bipolar

process. It is available in a space saving 3mm

3mm lead-

less package, as well as small outline and DIP packages.

LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

90MHz Gain Bandwidth, f = 100kHz

22V/μs Slew Rate

Settling Time: 900ns (A

= –1, 150μV, 10V Step)

Low Distortion, – 96.5dB for 100kHz, 10V

P-P

Maximum Input Offset Voltage: 75μV

Maximum Input Offset Voltage Drift: 2μV/°C

Maximum (–) Input Bias Current: 10nA

Minimum DC Gain: 1000V/mV

Minimum Output Swing into 2k: ±12.8V

Unity Gain Stable

Input Noise Voltage: 5nV/√Hz

Input Noise Current: 0.6pA/√Hz

Total Input Noise Optimized for 1k < R

< 20k

Speciﬁed at ±5V and ±15V

APPLICATIONS

16-Bit DAC Current-to-Voltage Converter

Precision Instrumentation

ADC Buffer

Low Distortion Active Filters

High Accuracy Data Acquisition Systems

Photodiode Ampliﬁers

TYPICAL APPLICATION

Total Harmonic Distortion vs Frequency

16-Bit DAC I-to-V Converter

TOTAL HARMONIC DISTORTION (dB)

–80

= ±15V

= 2

= 2k

OUT

= 10V

P-P

–90

20pF

DAC

INPUTS

–

LT1468

–100

OUT

50pF

LTC

1597

–110

OPTIONAL NOISE FILTER

OFFSET: V

+ I

(6kΩ) < 1LSB

SETTLING TIME TO 150μV = 1.7μs

SETTLING LIMITED BY 6k AND 20pF TO COMPENSATE DAC OUTPUT CAPACITANCE

1468 TA01

–120

–130

100

10k

FREQUENCY (Hz)

100k

1468 TA02

1468fa

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