LTC1565-31 Linear Technology, LTC1565-31 Datasheet - Page 7

• Manufacturer Part Number: LTC1565-31
• Description: 650kHz Continuous Time/ Linear Phase Lowpass Filter
• Manufacturer: Linear Technology

APPLICATIONS
Output Drive
Pin 7 and Pin 8 can drive a 1k or 300pF load connected
to AC ground with a 0.5V signal (corresponding to a
2V
connected from Pin 7 to Pin 8) the outputs can produce
a 2V
smaller signal amplitudes the outputs can drive corre-
spondingly larger loads.
Noise
The wideband noise of the filter is the RMS value of the
device’s output noise spectral density. The wideband
noise data is used to determine the operating signal-to-
noise at a given distortion level. Most of the noise is
concentrated in the filter passband and cannot be removed
with post filtering (Table 1). Table 2 lists the typical change
in wideband noise with supply voltage.
PACKAGE
P-P
P-P
differential signal). For differential loads (loads
differential signal across 2k
DESCRIPTION
U
(0.203 – 0.254)
**
0.008 – 0.010
*
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
INFORMATION
U
(0.254 – 0.508)
0.010 – 0.020
W
(0.406 – 1.270)
0.016 – 0.050
U
8-Lead Plastic Small Outline (Narrow 0.150)
45
or 150pF. For
Dimensions in inches (millimeters) unless otherwise noted.
U
(LTC DWG # 05-08-1610)
0 – 8 TYP
S8 Package
(5.791 – 6.197)
0.228 – 0.244
(1.346 – 1.752)
Table 1. Wideband Noise vs Bandwidth, Single 5V Supply
BANDWIDTH
DC to f
DC to 2 • f
Table 2. Wideband Noise vs Supply Voltage, f
POWER SUPPLY
5V
DC Offset
The output DC offset of the LTC1565-31 is trimmed to less
than 5mV. The trimming is done with V
output DC offset will typically change by 1mV when the
power supply varies from 5V to 5V.
0.053 – 0.069
(0.355 – 0.483)
0.014 – 0.019
5V
TYP
CUTOFF
CUTOFF
8
1
(4.801 – 5.004)
0.189 – 0.197*
7
2
6
3
5
4
(1.270)
0.050
BSC
(3.810 – 3.988)
(0.101 – 0.254)
0.150 – 0.157**
0.004 – 0.010
TOTAL INTEGRATED NOISE
110 V
115 V
TOTAL INTEGRATED NOISE
DC TO 2 • f
115 V
117 V
SO8 1298
RMS
RMS
RMS
RMS
LTC1565-31
CUTOFF
CUTOFF
S
= 2.5V. The
= 650kHz
7