6

LTC1164-6

11646fa

CC

HARA TERISTICS

A

TYPICALPERFOR

CE

THD + Noise vs RMS Input for

Single 5V (Elliptic Response)

INPUT (VRMS)

1164-6 G18

–40

–45

–50

–55

–60

–65

–70

–75

–80

–85

–90

0.1

1

2

A

B

A. GND = 2.5V

B. GND = 2V

(fCLK/fC) = 100:1 OR 50:1

fIN = 1kHz, TA = 25°C

THD + Noise vs RMS Input

(Elliptic Response)

INPUT (VRMS)

0.1

15

1164-6 G17

–40

–45

–50

–55

–60

–65

–70

–75

–80

–85

–90

VS = ±7.5V

VS = ±5V

(fCLK/fC) = 100:1 OR 50:1

fIN = 1kHz, TA = 25°C

Power Supply Current vs Power

Supply Voltage

POWER SUPPLY (V+ OR V–)

0

12

11

10

9

8

7

6

5

4

3

2

1

0

13

6

8

1164-6 G19

10

24

5

7

9

–55

°C

25

°C

125

°C

1ms/DIV

1164-6 G21

VS = ±7.5V, VIN = ±3V 100Hz SQUARE WAVE

fCLK = 800kHz, (fCLK/fC) = 160:1, fCUTOFF = 5kHz

LINEAR PHASE RESPONSE

Transient Response

Transient Response

1164-6 G20

1ms/DIV

VS = ±7.5V, VIN = ±3V 100Hz SQUARE WAVE

fCLK = 500kHz, (fCLK/fC) = 100:1, fCUTOFF = 5kHz

ELLIPTIC RESPONSE

at least a 1

µF capacitor (Figure 2). For single 5V operation

at the highest fCLK of 1MHz, Pins 3 and 5 should be biased

at 2V. This minimizes passband gain and phase variations

(see Typical Performance Characteristics curves: Maxi-

mum Passband for Single 5V, 50:1; and THD + Noise vs

RMS Input for Single 5V, 50:1).

V+ (Pins 4, 12):The V+ (Pin 4) and the V – (Pin 12) should

be bypassed with a 0.1

µF capacitor to an adequate analog

ground. The filter’s power supplies should be isolated

from other digital or high voltage analog supplies. A low

noise linear supply is recommended. Using a switching

power supply will lower the signal-to-noise ratio of the

filter. The supply during power-up should have a slew rate

less than 1V/

µs. When V+ is applied before V– and V–

(14-Lead Dual-In-Line Package)

PI FU CTIO S

NC (Pins 1, 8, 13): Pins 1, 8, and 13 are not connected to

any internal circuit point on the device and should prefer-

ably be tied to analog ground.

VIN (Pin 2): The input pin is connected internally through

a 50k resistor tied to the inverting input of an op amp.

GND (Pins 3, 5): The filter performance depends on the

quality of the analog signal ground. For either dual or

single supply operation, an analog ground plane sur-

rounding the package is recommended. The analog ground

plane should be connected to any digital ground at a single

point. For dual supply operation, Pins 3 and 5 should be

connected to the analog ground plane. For single supply

operation Pins 3 and 5 should be biased at 1/2 supply and

they should be bypassed to the analog ground plane with