Datasheet
3
LTC1562
1562fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Q Error V
S
= ±2.375V, LP Output Has R
L
= 5k, C
L
= 30pF +3 %
Wideband Output Noise, V
S
= ±2.375V, BW = 200kHz, Input AC GND 24 µV
RMS
Lowpass Response (V2 Output) V
S
= ±5V, BW = 200kHz, Input AC GND 24 µV
RMS
Input-Referred Noise, Gain = 100 BW = 200kHz, f
O
= 100kHz, Q = 1, Input AC GND 4.5 µV
RMS
THD Total Harmonic Distortion, f
IN
= 20kHz, 2.8V
P-P
, V1 and V2 Outputs Have –96 dB
Lowpass Response (V2 Output) R
L
= 5k, C
L
= 30pF
f
IN
= 100kHz, 2.8V
P-P
, V1 and V2 Outputs Have –78 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
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
NOMINAL f
O
(kHz)
50
Q ERROR (%)
35
30
25
20
15
10
5
0
–5
130
1562 G03
70 90 110 15012060 80 100 140
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
Q = 10
Q = 5
Q = 2.5
Q = 1
Q Error vs Nominal f
O
(V
S
= ±5V)
NOMINAL f
O
(kHz)
50
f
O
ERROR (%)
0
0.50
1.00
0.75
1.50
1.25
130
1562 G01
–0.50
–1.00
–0.25
0.25
–0.75
–1.25
–1.50
70
90
110
150
120
60
80
100
140
Q = 5
Q = 2.5
Q = 1
f
O
Error vs Nominal f
O
(V
S
= ±5V)
NOMINAL f
O
(kHz)
50
f
O
ERROR (%)
0
0.50
1.00
0.75
1.50
1.25
130
1562 G02
–0.50
–1.00
–0.25
0.25
–0.75
–1.25
–1.50
70
90
110
150
120
60
80
100
140
Q = 5
Q = 2.5
Q = 1
f
O
Error vs Nominal f
O
(V
S
= ±2.5V)
The ● denotes the 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 = R
Q
=10k ±0.1%, f
O
= 100kHz, unless noted.
ELECTRICAL CHARACTERISTICS
Note 2: f
O
change from ±5V to ±2.375 supplies is –0.15% typical,
f
O
temperature coefficient, –40°C to 85°C, is –25ppm/°C typical.