LTC1064-1

4

10641fa

FREQUENCY (kHz)

1

15

0

–15

–30

–45

–60

–75

–90

–105

10

100

1064 G04

fCLK = 2MHz, fC = 20kHz

COMP1 NOT USED,

COMP2 = 20pF

fCLK = 4MHz, fC = 40kHz

COMP1 = 36pF

COMP2 = 47pF

fCLK = 3MHz, fC = 30kHz

COMP1 = 24pF

COMP2 = 36pF

VS = ±5V

TA = 25°C

FREQUENCY (kHz)

1

15

0

–15

–30

–45

–60

–75

–90

–105

10

100

1064 G05

fCLK = 3MHz, fC = 30kHz

COMP1 = 10pF

COMP2 = 15pF

fCLK = 4MHz, fC = 40kHz

COMP1 = 20pF

COMP2 = 30pF

VS = ±7.5V

TA = 25°C

fCLK = 5MHz, fC = 50kHz

COMP1 = 30pF

COMP2 = 47pF

Gain vs Frequency

Gain vs Frequency

Gain vs Frequency

Typical Wideband Noise

(151µVRMS) VS = ±5V, TA = 25°C

fCLK = 1MHz, fC = 10kHz Input

Grounded

Power Supply Current vs Power

Supply Voltage

TYPICAL PERFOR A CE CHARACTERISTICS

TOTAL POWER SUPPLY VOLTAGE (V)

0

2468 10 12 14 16 18 20 22 24

48

44

40

36

32

28

24

20

16

12

8

4

0

1064 G09

TA = –55°C

TA = 25°C

TA = 125°C

fCLK = 1MHz

FREQUENCY (kHz)

1

5

0

–5

–10

–15

–20

–25

–30

–35

10

100

1064 G06

VS = ±7.5V

fCLK = 5MHz

fC = 50kHz

COMP1 = 33pF

COMP2 = 56pF

25°C GAIN PEAK =

0.4dB AT 30kHz

125°C GAIN PEAK =

1dB AT 35kHz

is protected against static discharge. The device’s output,

Pin 9, is the output of an op amp which can typically source/

sink 3mA/1mA. Although the internal op amps are unity

gain stable, driving long coax cables is not recommended.

When testing the device for noise and distortion, the

output, Pin 9, should be buffered (Figure 4).

The op amp

power supply wire (or trace) should be connected

directly to the power source.

AGND (Pins 3, 5): For dual supply operation these pins

should be connected to a ground plane. For single supply

PI FU CTIO S

COMP1, INV A, COMP2, INV C (Pins 1,6,7, and 13): For

filter cutoff frequencies higher than 20kHz, in order to

minimize the passband ripple, compensation capacitors

should be added between Pin 6 and Pin 7 (COMP1) and

Pin 1 and Pin 13 (COMP2). For COMP1 (COMP2), add 1pF

(1.5pF) mica capacitor for each kHz increase in cutoff

frequency above 20kHz. For more detail refer to Gain vs

Frequency graphs.

VIN, VOUT (Pins 2, 9): The input Pin 2 is connected to an

18k resistor tied to the inverting input of an op amp. Pin 2

(Pin Numbers Refer to the 14-Pin Package)

Total Harmonic Distortion

(0.025%) VS = ±7.5V, TA = 25°C

fCLK = 1MHz, fC = 10kHz

Input = 1kHz at 3VRMS