LT1568CGNPBF datasheet(5/16 Pages) LINEAR_DIMENSIONS

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LT1568

1568f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Filter Gain, fC = 10MHz,

Test Frequency = 1MHz (0.1 • fC)

–0.3

0.15

0.5

VS = 5V, RFIL = 128Ω

Test Frequency = 7.5MHz (0.75 • fC)

–1.2

–0.50

0.0

(Measured with Respect to DC Gain)

Test Frequency = 10MHz (1 • fC)

–3.1

–2.30

–1.5

Test Frequency = 20MHz (2 • fC)

–12.2

–11.2

–10.2

Test Frequency = 40MHz (4 • fC)

–19.1

Filter Gain Mismatch

fC = 1MHz, fIN = fC

–0.4

±0.02

0.4

(

VOUTA – VOUTB)fC = 10MHz, fIN = fC

–0.5

±0.02

0.5

Wideband Output Noise

fC = 1MHz, RFIL = 1.28k, BW = 2MHz

µVRMS

fC = 10MHz, RFIL = 128Ω, BW = 20MHz

µVRMS

THD

Total Harmonic Distortion

fC = 1MHz, RFIL = 1.28k,

– 84

fIN = 200kHz, VIN = 1VP-P

fC = 10MHz, RFIL = 128Ω,– 75

fIN = 2MHz, VIN = 1VP-P

Specifications are for the

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 typcial values are at TA = 25°C. VS = single 5V, EN pin to logic “low,”

RL = 400Ω connected to midsupply, unless otherwise noted.

Specifications are for the

differential output (OUTA – OUTA or OUTB – OUTB) of a single 2nd order section (A or B), gain = –2,

RFIL = R11 = R21 = R31 = R12 = R22 = R32. All voltages are with respect to VGND = VGNDA = VGNDB. 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,” RLDIFF = 800Ω connected at midsupply, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ADC

DC Gain

–2

V/V

VOS(OUT)

DC Offset Voltage

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

–4

(OUTA – OUTA) or (OUTB – OUTB)

VS = 5V, fC = 1MHz, RFIL = 1.28k

–12

VS = ±5V, fC = 1MHz, RFIL = 1.28k

–20

–5

∆VOS(OUT)

DC Offset Voltage Mismatch

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

–8

(OUTA – OUTA) – (OUTB – OUTB)

VS = 5V, fC = 1MHz, RFIL = 1.28k

–12

–2

VS = ±5V, fC = 1MHz, RFIL = 1.28k

–15

Transfer Function Characteristics for Each Section (A or B) to Differential Output (OUTA – OUTA or OUTB – OUTB)

Cutoff Frequency Range (Note 7)

VS = 3V, VS = 5V, VS = ±5V

0.2

MHz

Cutoff Frequency Temperature Coefficient

±1

ppm/

°C

Filter Gain, fC = 1MHz,

Test Frequency = 300kHz (0.3 • fC)

–0.05

0.10

0.25

VS = 5V, RFIL = 1.28k (Note 8)

Test Frequency = 750kHz (0.75 • fC)

–1.40

–1.10

–0.80

(Measured with Respect to DC Gain)

Test Frequency = 1MHz (1 • fC)

–3.60

–3.20

–2.70

Test Frequency = 2MHz (2 • fC)

–13.7

–13.1

–12.5

Test Frequency = 4MHz (4 • fC)

–25.0

Filter Gain, fC = 10MHz,

Test Frequency = 1MHz (0.1 • fC)

–0.20

0.1

0.30

VS = 5V, RFL = 128Ω (Note 8)

Test Frequency = 7.5MHz (0.75 • fC)

–1.30

–0.8

–0.20

(Measured with Respect to DC Gain)

Test Frequency = 10MHz (1 • fC)

–3.30

–2.6

–1.90

Test Frequency = 20MHz (2 • fC)

–13.1

–12.1

–11.1

Test Frequency = 40MHz (4 • fC)

–24.3

FILTER ELECTRICAL CHARACTERISTICS

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