Datasheet

4
LTC1562-2
15622fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Peak BP Gain vs Nominal f
O
(V
S
= ±5V) (Figure 3, V1 Output)
Q Error vs Nominal f
O
(V
S
= ±2.5V)
Peak BP Gain vs Nominal f
O
(V
S
= ±2.5V) (Figure 3, V1 Output)
NOMINAL f
O
(kHz)
100
Q ERROR (%)
55
50
45
40
35
30
25
20
15
10
5
0
–5
260
1562-2 G04
140 180 220 300240120 160 200 280
Q = 5
Q = 2.5
Q = 1
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
NOMINAL f
O
(kHz)
100
PEAK BP GAIN (dB)
0.25
0
0.50
1.00
3.00
2.00
140
180
200 280
2.50
1.50
0.75
1.25
2.25
2.75
1.75
120 160
220
240
260
300
1562-2 G5
Q = 5
Q = 2.5
Q = 1
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
NOMINAL f
O
(kHz)
100
PEAK BP GAIN (dB)
0.25
0
0.50
1.00
3.00
2.00
140
180
200 280
2.50
1.50
0.75
1.25
2.25
2.75
4.00
3.50
3.25
3.75
1.75
120 160
220
240
260
300
1562-2 G6
Q = 5
Q = 2.5
Q = 1
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
LP Noise vs Nominal f
O
(V
S
= ±5V, 25°C) (Figure 3,
V2 Output) (R
IN
= R2)
NOMINAL f
O
(kHz)
120
10
LP NOISE (µV
RMS
)
30
60
70
80
90
100
160
200
220
1562-2 G07
20
50
40
140 180
240
260
280
Q = 5
Q = 2.5
Q = 1
BP Noise vs Nominal f
O
(V
S
= ±5V, 25°C) (Figure 3,
V1 Output) (R
IN
= R
Q
)
NOMINAL f
O
(kHz)
120
10
BP NOISE (µV
RMS
)
30
60
70
80
90
100
160
200
220
1562-2 G08
20
50
40
140 180
240
260
280
Q = 5
Q = 2.5
Q = 1
PIN FUNCTIONS
UUU
Distortion vs External Load
Resistance and Frequency
(V
S
= ±5V, 25°C) (Figure 8)
EXTERNAL LOAD RESISTANCE (Ω)
10k
–100
THD (AMPLITUDE BELOW FUNDAMENTAL) (dB)
THD (AMPLITUDE BELOW FUNDAMENTAL) (%)
–80
–70
–60
–50
–40
–30
5k
2k
1562-2 G09
–20
–10
0
0.001
0.01
0.1
1
10
100
–90
1k
f
IN
= 20kHz
f
IN
= 50kHz
2nd ORDER LOWPASS
f
O
= 200kHz
Q = 0.7
OUTPUT LEVEL 1V
RMS
(2.83V
P-P
)
±5V SUPPLIES
f
IN
= 100kHz
Power Supply Pins: The V
+
and V
–
pins should be
bypassed with 0.1µF capacitors to an adequate analog
ground or ground plane. These capacitors should be
connected as closely as possible to the supply pins. Pins
4, 7, 14 and 17 are internally connected to V
–
(Pin 16) and
should also be tied to the same point as Pin 16 for best
shielding. Low noise linear supplies are recommended.
Switching supplies are not recommended as they will
lower the filter dynamic range.
Analog Ground (AGND): The AGND pin is the midpoint of
a resistive voltage divider, developing a potential halfway
between the V
+
and V
–
pins, with an equivalent series
resistance nominally 7k. This serves as an internal ground
reference. Filter performance will reflect the quality of the
analog signal ground and an analog ground plane
surrounding the package is recommended. The analog
ground plane should be connected to any digital ground at
a single point. For dual supply operation, the AGND pin