LTC1562IG-2 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1562IG-2' PDF : 16 Pages View PDF
LTC1562-2
TYPICAL PERFOR A CE CHARACTERISTICS
Q Error vs Nominal fO (VS = ±2.5V)
55
50
TA = 70°C
TA = 25°C
45 RIN = RQ
40
Q=5
35
30
25
20
Q = 2.5
15
10
Q=1
5
0
–5
100 120 140 160 180 200 220 240 260 280 300
NOMINAL fO (kHz)
1562-2 G04
Peak BP Gain vs Nominal fO
(VS = ±5V) (Figure 3, V1 Output)
3.00
2.75
TA = 70°C
TA = 25°C
2.50 RIN = RQ
2.25
Q=5
2.00
1.75
1.50
1.25
Q = 2.5
1.00
0.75
0.50
Q=1
0.25
0
100 120 140 160 180 200 220 240 260 280 300
NOMINAL fO (kHz)
1562-2 G5
Peak BP Gain vs Nominal fO
(VS = ±2.5V) (Figure 3, V1 Output)
4.00
3.75
TA = 70°C
3.50
TA = 25°C
3.25 RIN = RQ
3.00
2.75
Q=5
2.50
2.25
2.00
1.75
1.50
Q = 2.5
1.25
1.00
0.75
Q=1
0.50
0.25
0
100 120 140 160 180 200 220 240 260 280 300
NOMINAL fO (kHz)
1562-2 G6
LP Noise vs Nominal fO
(VS = ±5V, 25°C) (Figure 3,
V2 Output) (RIN = R2)
100
90
80
70
Q=5
60
50
Q = 2.5
40
Q=1
30
20
10
120 140 160 180 200 220 240 260 280
NOMINAL fO (kHz)
1562-2 G07
BP Noise vs Nominal fO
(VS = ±5V, 25°C) (Figure 3,
V1 Output) (RIN = RQ)
100
90
80
70
60
Q=5
50
Q = 2.5
40
30
Q=1
20
10
120 140 160 180 200 220 240 260 280
NOMINAL fO (kHz)
1562-2 G08
Distortion vs External Load
Resistance and Frequency
(VS = ±5V, 25°C) (Figure 8)
0
100
2nd ORDER LOWPASS
–10 fO = 200kHz
– 20
Q = 0.7
OUTPUT LEVEL 1VRMS (2.83VP-P)
10
–30 ± 5V SUPPLIES
– 40
1
– 50
– 60
0.1
– 70
– 80
– 90
–100
10k
fIN = 100kHz
fIN = 50kHz
fIN = 20kHz
5k
2k
EXTERNAL LOAD RESISTANCE (Ω)
0.01
0.001
1k
1562-2 G09
PIN FUNCTIONS
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
4
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