Datasheet
LTC1064-1
4
10641fa
FREQUENCY (kHz)
1
GAIN (dB)
15
0
–15
–30
–45
–60
–75
–90
–105
10 100
1064 G04
f
CLK
= 2MHz, f
C
= 20kHz
COMP1 NOT USED,
COMP2 = 20pF
f
CLK
= 4MHz, f
C
= 40kHz
COMP1 = 36pF
COMP2 = 47pF
f
CLK
= 3MHz, f
C
= 30kHz
COMP1 = 24pF
COMP2 = 36pF
V
S
= ±5V
T
A
= 25°C
FREQUENCY (kHz)
1
GAIN (dB)
15
0
–15
–30
–45
–60
–75
–90
–105
10 100
1064 G05
f
CLK
= 3MHz, f
C
= 30kHz
COMP1 = 10pF
COMP2 = 15pF
f
CLK
= 4MHz, f
C
= 40kHz
COMP1 = 20pF
COMP2 = 30pF
V
S
= ±7.5V
T
A
= 25°C
f
CLK
= 5MHz, f
C
= 50kHz
COMP1 = 30pF
COMP2 = 47pF
Gain vs Frequency Gain vs Frequency Gain vs Frequency
Typical Wideband Noise
(151µV
RMS
) V
S
= ±5V, T
A
= 25°C
f
CLK
= 1MHz, f
C
= 10kHz Input
Grounded
Power Supply Current vs Power
Supply Voltage
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TOTAL POWER SUPPLY VOLTAGE (V)
0 24681012141618202224
POWER SUPPLY CURRENT (mA)
48
44
40
36
32
28
24
20
16
12
8
4
0
1064 G09
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
f
CLK
= 1MHz
FREQUENCY (kHz)
1
GAIN (dB)
5
0
–5
–10
–15
–20
–25
–30
–35
10 100
1064 G06
V
S
= ±7.5V
f
CLK
= 5MHz
f
C
= 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
UU
U
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.
V
IN
, V
OUT
(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%) V
S
= ±7.5V, T
A
= 25°C
f
CLK
= 1MHz, f
C
= 10kHz
Input = 1kHz at 3V
RMS