Datasheet

3
LTC1562-2
15622fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
THD Total Harmonic Distortion, V2 Output f
IN
= 20kHz, 2.8V
P-P
, V1 and V2 Outputs Have –100 dB
R
L
= 5k, C
L
= 30pF
f
IN
= 20kHz, 9V
P-P
, V1 and V2 Outputs Have –82 dB
R
L
= 5k, C
L
= 30pF
Shutdown Supply Current SHDN Pin to V
+
1.5 15 µA
SHDN Pin to V
+
, V
S
= ±2.375V 1.0 µA
Shutdown-Input Logic Threshold 2.5 V
Shutdown-Input Bias Current SHDN Pin to 0V –10 –20 µA
Shutdown Delay SHDN Pin Steps from 0V to V
+
20 µs
Shutdown Recovery Delay SHDN Pin Steps from V
+
to 0V 100 µs
Inverting Input Bias Current, Each Biquad 5 pA
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: f
O
change from ±5V to ±2.375 supplies is –0.2% typical,
f
O
temperature coefficient magnitude, 25°C to 85°C, is
50ppm/°C typical.
As with the LTC1562, f
O
decreases with increasing temperature.
Note 3: Tighter frequency tolerance is available, consult factory.
The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, outputs unloaded, SHDN pin to logic “low”, unless otherwise noted. AC
specs are for a single 2nd order section, R
IN
= R2 = 10.4k ±0.1%, R
Q
= 9.09k ±0.1%, f
O
= 175kHz.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
f
O
Error vs Nominal f
O
(V
S
= ±5V)
f
O
Error vs Nominal f
O
(V
S
= ±2.5V)
NOMINAL f
O
(kHz)
100
Q ERROR (%)
35
40
45
30
25
20
15
10
5
0
–5
260
1562-2 G03
140 180 220 300240120 160 200 280
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
Q = 5
Q = 2.5
Q = 1
Q Error vs Nominal f
O
(V
S
= ±5V)
NOMINAL f
O
(kHz)
120
f
O
ERROR (%)
0
1.0
2.0
1.5
3.0
2.5
1562-2 G01
–1.0
–2.0
–0.5
0.5
–1.5
–2.5
–3.0
160 200 240 280260140 180 220
Q = 5
Q = 2.5
Q = 1
T
A
= 25°C
R
IN
= R
Q
NOMINAL f
O
(kHz)
120
f
O
ERROR (%)
0
1.0
2.0
1.5
3.0
2.5
1562-2 G02
–1.0
–2.0
–0.5
0.5
–1.5
–2.5
–3.0
160 200 240 280260140 180 220
Q = 5
Q = 2.5
Q = 1
T
A
= 25°C
R
IN
= R
Q