LT1568IGN datasheet(3/16 Pages) LINER

Part #	LT1568IGN

Description	Very Low Noise, High Frequency Active RC, Filter Building Block

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1568

3

1568f

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications and typical values are at TA = 25°C. VS = single 5V, EN pin to logic “low,” RL = 400Ω,

connected to midsupply, RFIL = R11 = R21 = R31 = R12 = R22 = R32, unless otherwise noted (see Block Diagram).

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IB

Op Amp Input Bias Current

VS = 3V

q

0.5

2

µA

VS = 5V

q

0.4

2

µA

VS = ±5V

q

–0.2

2

µA

Inverter Bandwidth (Note 4)

55

MHz

Inverter Gain (Sections A and B, Note 5)

Frequency = DC

q

–0.2

0.01

0.2

dB

Frequency = 2MHz

0.01

dB

Frequency = 10MHz

0.27

dB

Inverter Phase Shift (Sections A and B,

Frequency = DC

180

DEG

Note 5)

Frequency = 2MHz

179

DEG

Frequency = 10MHz

176

DEG

SR

Slew Rate (OUTA, OUTB, OUTA,

53

V/

µs

OUTB) Pins

VCM

Common Mode Input Voltage Range

VS = 3V

1 to 1.9

V

(GNDA and GNDB Pins, Note 6)

VS = ±5V

–3.4 to 2.7

V

Single Supply GND Reference Voltage

VS = 5V, GNDA Tied to GNDB

2.5

V

VIL

EN Input Logic Low Level

VS = 3V, 5V or ±5V

q

V+ – 2.1

V

VIH

EN Input Logic High Level

VS = 3V, 5V or ±5V

q

V+ – 0.6

V

EN Input Pull-Up Resistor

30

40

k

Ω

tDIS

Disable (Shutdown) Time

EN Pin Steps from 0V to V+

20

µs

tEN

Enable (Start-Up) Time

EN Pin Steps from V+ to 0V

100

µs

ELECTRICAL CHARACTERISTICS

Specifications are for the output (OUTA or OUTB) of a

single 2nd order section (A or B) with respect to VGND = VGNDA = VGNDB,

gain = –1, RFIL = R11 = R21 = R31 = R12 = R22 = R32, (see Block Diagram). The q denotes the specifications which apply over the

full operating temperature range, otherwise specifications and typical values are at TA = 25°C. VS = single 5V, EN pin to logic “low,”

RL = 400Ω, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ADC

DC Gain

q

–1.01

–1

–0.99

V/V

VOS(OUT)

DC Offset Voltage

VS = 3V, fC = 1MHz, RFIL = 1.28k

q

–5

2.6

15

mV

(VOUTA – VGNDA) or (VOUTB – VGNDB)VS = 5V, fC = 1MHz, RFIL = 1.28k

q

–10

0.6

10

mV

VS = ±5V, fC = 1MHz, RFIL = 1.28k

q

–12

–4.0

4

mV

∆VOS(OUT)

DC Offset Voltage Mismatch

VS = 3V, fC = 1MHz, RFIL = 1.28k

q

–8

±48

mV

(VOUTA – VGNDA) – (VOUTB – VGNDB)VS = 5V, VS = ±5V, fC = 1MHz, RFIL = 1.28k

q

–10

±410

mV

Transfer Function Characteristics for Each Section (A or B) to Single-Ended Output (OUTA or OUTB)

fC

Cutoff Frequency Range (Note 7)

VS = 3V, VS = 5V, VS = ±5V

q

0.2

10

MHz

TC

Cutoff Frequency Temperature Coefficient

q

±1

ppm/

°C

FILTER ELECTRICAL CHARACTERISTICS

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