ltc1069-7is8-trpbf Linear Technology Corporation, ltc1069-7is8-trpbf Datasheet

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ltc1069-7is8-trpbf

Manufacturer Part Number
ltc1069-7is8-trpbf
Description
Low Power, 8th Order Progressive Elliptic, Lowpass Filter
Manufacturer
Linear Technology Corporation
Datasheet
FEATURE
D
A
The LTC
featuring clock-tunable cutoff frequency and 2.5mA power
supply current with a single 5V supply. An additional
feature of the LTC1069-1 is operation with a single 3.3V
supply.
TYPICAL
PPLICATI
ESCRIPTIO
8th Order Elliptic Filter in SO-8 Package
Operates from Single 3.3V to 5V Power Supplies
– 20dB at 1.2 f
– 52dB at 1.4 f
– 70dB at 2 f
Wide Dynamic Range
110 V
3.8mA Supply Current with 5V Supplies
2.5mA Supply Current with Single 5V Supply
2mA Supply Current with Single 3.3V Supply
Telecommunication Filters
Antialiasing Filters
Single 3.3V Supply 3kHz Elliptic Lowpass Filter
®
RMS
1069-1 is a monolithic 8th order lowpass filter
+
3.3V
Wideband Noise
S
A
CUTOFF
0.47 F
0.1 F
O
CUTOFF
CUTOFF
PPLICATI
U
U
V
IN
S
1
2
3
4
AGND
V
NC
V
IN
+
LTC1069-1
O
V
CLK
OUT
NC
V
U
8
7
6
5
V
f
300kHz
CLK
OUT
1069-1 TA01
The cutoff frequency (f
to the clock frequency divided by 100. The gain at f
is – 0.7dB and the typical passband ripple is 0.15dB
up to 0.9 f
LTC1069-1 features a progressive elliptic response
reaching 20dB attenuation at 1.2 f
tion at 1.4f
With 5V supplies, the LTC1069-1 cutoff frequency can
be clock-tuned up to 12kHz; with a single 5V supply, the
maximum cutoff frequency is 8kHz.
The low power feature of the LTC1069-1 does not penal-
ize the device’s dynamic range. With 5V supplies and an
input range of 0.3V
+ THD) ratio is
LTC1069-1 is 110 V
lower power or higher speed can be obtained. Please
contact LTC marketing for details.
The LTC1069-1 is available in 8-pin PDIP and 8-pin SO
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Power, 8th Order
CUTOFF
–20
–30
–40
–50
–60
–70
–80
–10
CUTOFF
10
0
1.5
Progressive Elliptic,
. The stopband attenuation of the
and 70dB attenuation at 2f
RMS
70dB. The wideband noise of the
Frequency Response
3
RMS
CUTOFF
to 2.5V
FREQUENCY (kHz)
. Other filter responses with
4.5
Lowpass Filter
) of the LTC1069-1 is equal
RMS
CUTOFF
6
, the signal-to-(noise
LTC1069-1
1069-1 TA02
7.5
, 52dB attenua-
CUTOFF
CUTOFF
.
1

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ltc1069-7is8-trpbf Summary of contents

Page 1

... With 5V supplies and an input range of 0.3V + THD) ratio is LTC1069-1 is 110 V lower power or higher speed can be obtained. Please contact LTC marketing for details. The LTC1069-1 is available in 8-pin PDIP and 8-pin SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation OUT 7 – ...

Page 2

... Maximum Voltage at – Any Pin ............................ (V – 0.3V Operating Temperature Range LTC1069-1C ........................................... LTC1069-1I ....................................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL CHARACTERISTICS f is the filter’s cutoff frequency and is equal to f CUTOFF ...

Page 3

... RMS –20 –30 –40 –50 –60 –70 –80 – FREQUENCY (kHz) 1069-1 G02 LTC1069-1 1 s), MIN TYP MAX – 58 – 53 – 50 – 59 – 49 – 58 – 53 – 50 – 59 – 150 20 15 100 – 3.25 4.0 3.25 – 1.50 1 ...

Page 4

... LTC1069 TYPICAL PERFORMANCE CHARACTERISTICS Passband Gain vs Clock Frequency Single 3. SINGLE 3. 0.5V IN RMS 1 750kHz CLK f = 7.5kHz C 0.5 0 –0 500kHz CLK –1 5kHz C –1.5 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 FREQUENCY (kHz) 1069-1 G04 Gain vs Supply Voltage 500kHz CLK 0.5V IN RMS –10 –20 –30 –40 – ...

Page 5

... AMBIENT TEMPERATURE ( C) 1069-1 G14 + 1 8 AGND V V OUT OUT 2 7 – – LTC1069-1 0 CLK IN IN ANALOG GROUND PLANE STAR DIGITAL 1k SYSTEM GROUND GROUND PLANE CLOCK SOURCE 1069-1 F02 ...

Page 6

... U APPLICATIONS INFORMATION Temperature Behavior The power supply current of the LTC1069-1 has a positive temperature coefficient. The GBW product of its internal op amps is nearly constant and the speed of the device does not degrade at high temperatures. Figures 3a, 3b and 3c show the behavior of the maximum passband of the device for various supplies and temperatures ...

Page 7

... The internal sampling frequency of the LTC1069-1 is 100 times its cutoff frequency. For instance 98kHz, 100mV input of an LTC1069-1 operating with a 100kHz clock, a 2kHz Table 4 shows details. Table 4. Aliasing (f INPUT FREQUENCY ...

Page 8

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE RELATED PARTS PART NUMBER DESCRIPTON LTC1068 Very Low Noise, High Accuracy, Quad Universal Filter Building Block LTC1069-6 Single Supply, Very Low Power, Elliptic LPF LTC1164-5 Low Power 8th Order Butterworth LPF LTC1164-6 Low Power 8th Order Elliptic LPF ...

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