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LTC1065CN8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1065
1065fb
■
Clock-Tunable Cutoff Frequency
■
1mV DC Offset (Typical)
■
80dB CMR (Typical)
■
Internal or External Clock
■
50µV
RMS
Clock Feedthrough
■
100:1 Clock-to-Cutoff Frequency Ratio
■
80µV
RMS
Total Wideband Noise
■
0.004% Noise + THD at 2V
RMS
Output Level
■
50kHz Maximum Cutoff Frequency
■
Cascadable for Faster Roll-Off
■
Operates from ±2.375 to ±8V Power Supplies
■
Self-Clocking with 1 RC
■
Available in 8-Pin DIP and 16-Pin SW Packages
The LTC
®
1065 is the first monolithic filter providing both
clock-tunability with low DC output offset and over 12-bit
DC accuracy. The frequency response of the LTC1065
closely approximates a 5th order Bessel polynomial. With
appropriate PCB layout techniques the output DC offset is
typically 1mV and is constant over a wide range of clock
frequencies. With ±5V supplies and ±4V input voltage
range, the CMR of the device is typically 80dB.
The filter cutoff frequency is controlled either by an inter-
nal or external clock. The clock-to-cutoff frequency ratio is
100 : 1. The on-board clock is nearly power supply inde-
pendent and it is programmed via an external RC. The
50µV
RMS
clock feedthrough of the device is considerably
lower than other existing monolithic filters.
The LTC1065 wideband noise is 80µV
RMS
and it can
process large AC input signals with low distortion. With
± 7.5V supplies, for instance, the filter handles up to
4V
RMS
(94dB S/N ratio) while the standard 1kHz THD is
below 0.005%; 87dB dynamic range (S/N + THD) is ob-
tained with input levels between 2V
RMS
and 2.5V
RMS
.
The LTC1065 is available in 8-pin miniDIP and 16-pin SW
packages. For a Butterworth response, see LTC1063 data
sheet. The LTC1065 is pin compatible with the LTC1063.
APPLICATIO S
U
TYPICAL APPLICATIO
U
DESCRIPTIO
U
FEATURES
DC Accurate, Clock-Tunable
Linear Phase 5th Order Bessel
Lowpass Filter
3.4kHz Single 5V Supply Bessel Lowpass Filter
■
Audio
■
Strain Gauge Amplifiers
■
Anti-Aliasing Filters
■
Low Level Filtering
■
Digital Voltmeters
■
Smoothing Filters
■
Reconstruction Filters
V
IN
4.53k
13k*
5V
0.1µF
V
OUT
1065 TA01
SELF-CLOCKING SCHEME
*
200pF*
1
2
3
4
8
7
6
5
LTC1065
0.1µF
5V
4.99k
+
1µF
TANT
Frequency Response
FREQUENCY (kHz)
1
GAIN (dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
10 100
1065 TA01b
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 4857860.
2
LTC1065
1065fb
PARAMETER CONDITIONS MIN TYP MAX UNITS
Clock-to-Cutoff Frequency Ratio (f
CLK
/f
C
) ±2.375V ≤ V
S
≤ ±7.5V 100± 0.5
Maximum Clock Frequency (Note 2) V
S
= ±7.5V 5 MHz
V
S
= ±5V 4 MHz
V
S
= ±2.5V 3 MHz
Minimum Clock Frequency (Note 3) ±2.5V ≤ V
S
≤ ±7.5V, T
A
< 85°C30Hz
Input Frequency Range 00.9f
CLK
Filter Gain V
S
= ±5V, f
CLK
= 25kHz, f
C
= 250Hz
f
IN
= 250Hz ● – 3.5 – 3.1 – 2.7 dB
f
IN
= 1kHz ● – 43.0 – 41.0 – 39.0 dB
V
S
= ±5V, f
CLK
= 500kHz, f
C
= 5kHz
f
IN
= 100Hz 0 dB
f
IN
= 1kHz = 0.2f
C
● – 0.215 – 0.175 –0.135 dB
f
IN
= 2.5kHz = 0.5f
C
● – 1.1 –0.972 –0.84 dB
f
IN
= 4kHz = 0.8f
C
● – 2.35 – 2.13 –1.9 dB
f
IN
= 5kHz = f
C
● – 3.35 – 3.1 – 2.7 dB
f
IN
= 10kHz = 2f
C
● – 14.5 – 14.15 –13.0 dB
f
IN
= 20kHz = 4f
C
● – 43.0 –41.15 –39.0 dB
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
PACKAGE/ORDER I FOR ATIO
UUW
Total Supply Voltage (V
+
to V
–
) .......................... 16.5V
Power Dissipation............................................. 400mW
Voltage at Any Input .... (V
–
– 0.3V) ≤ V
IN
≤ (V
+
+ 0.3V)
Burn-In Voltage ...................................................... 16V
Storage Temperature Range ................ – 65°C to 150°C
Operating Temperature Range (Note 7)
LTC1065C .............................................. 0°C to 70°C
LTC1065I........................................... –40°C to 85°C
LTC1065M (OBSOLETE).................. – 55°C to 125°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
ORDER PART
NUMBER
LTC1065CN8
LTC1065IN8
LTC1065MJ8
LTC1065CSW
LTC1065ISW
T
JMAX
= 100°C, θ
JA
= 85°C/W
TOP VIEW
SW PACKAGE
16-LEAD PLASTIC SO WIDE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
V
IN
GND
NC
V
–
NC
NC
CLK OUT
V
OS
ADJ
NC
V
OUT
NC
V
+
NC
NC
CLK IN
ABSOLUTE AXI U RATI GS
W
WW
U
(Note 1)
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
S
= ±5V, f
CLK
= 500kHz, f
C
= 5kHz, R
L
= 10k, T
A
= 25°C unless otherwise specified.
1
2
3
4
8
7
6
5
TOP VIEW
V
IN
GND
V
–
CLK OUT
V
OS
ADJ
V
OUT
V
+
CLK IN
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 100°C, θ
JA
= 110°C/W (N)
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 150°C, θ
JA
= 100°C/W (J)
OBSOLETE PACKAGE
Consider the N Package for an Alernate Source
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF, Lead Free Tape and Reel: Add #TRPBF, Lead Free Part Marking: http://www.linear.com/leadfree/
3
LTC1065
1065fb
PARAMETER CONDITIONS MIN TYP MAX UNITS
Filter Gain V
S
= ±2.375V, f
CLK
= 500kHz, f
C
= 5kHz
f
IN
= 1kHz ● – 0.225 –0.185 – 0.145 dB
f
IN
= 2.5kHz ● – 1.1 – 1.0 – 0.83 dB
f
IN
= 4kHz ● – 2.35 – 2.15 – 1.9 dB
f
IN
= 5kHz ● – 3.35 – 3.1 – 2.7 dB
f
IN
= 10kHz ● –14.5 –14.1 –13.0 dB
Clock Feedthrough ±2.375V ≤ V
S
≤ ±7.5V 50 µV
RMS
Wideband Noise (Note 4) ±2.375V ≤ V
S
≤ ±7.5V, 1Hz < f < f
CLK
80 µV
RMS
THD + Wideband Noise (Note 5) V
S
= ±7.5V, f
C
= 20kHz, f
IN
= 1kHz, – 87 dB
2V
RMS
≤ V
IN
≤ 2.5V
RMS
Filter Output ± DC Swing V
S
= ±2.375V 1.5/–2.0 1.7/–2.2 V
● 1.3/–1.8 V
V
S
= ±5V 4.0/–4.5 4.3/–4.8 V
● 3.8/–4.3 V
V
S
= ±7.5V 6.5/–7.0 6.8/–7.3 V
● 6.3/–6.8 V
Input Bias Current 10 nA
Dynamic Input Impedance 800 MΩ
Output DC Offset (Note 6) V
S
= ±2.375V 2 mV
V
S
= ±5V 0 ±5mV
V
S
= ±7.5V – 4 mV
Output DC Offset Drift V
S
= ±2.375V 10 µV/°C
V
S
= ±5V 20 µV/°C
V
S
= ±7.5V 25 µV/°C
Self-Clocking Frequency (f
OSC
) R (Pin 4 to 5) = 20k, C (Pin 5 to GND) = 470pF
V
S
= ±2.375V 99 103 112 kHz
LTC1065C
● 95 103 112 kHz
LTC1065M ● 92 100 112 kHz
V
S
= ±5V 100 106 112 kHz
LTC1065C
● 98 106 114 kHz
LTC1065M ● 97 105 114 khz
V
S
= ±7.5V 102 106 114 kHz
LTC1065C
● 101 109 116 kHz
LTC1065M ● 100 108 116 kHz
External CLK Pin Logic Thresholds V
S
= ±2.375V Min Logical “1” 1.43 V
Max Logical “0” 0.47 V
V
S
= ±5V Min Logical “1” 3 V
Max Logical “0” 1 V
V
S
= ±7.5V Min Logical “1” 4.5 V
Max Logical “0” 1.5 V
Power Supply Current V
S
= ±2.375V, f
CLK
= 500kHz 2.5 4.0 mA
LTC1065C
● 5.5 mA
LTC1065M ● 6.0 mA
V
S
= ±5V, f
CLK
= 500kHz 5.5 9 mA
LTC1065C
● 11 mA
LTC1065M ● 12 mA
V
S
= ±7.5V, f
CLK
= 500kHz 7.0 12.0 mA
LTC1065C
● 14.5 mA
LTC1065M ● 16.0 mA
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
S
= ±5V, f
CLK
= 500kHz, f
C
= 5kHz, R
L
= 10k, T
A
= 25°C unless otherwise specified.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1065CN8#PBF

Mfr. #:
Buy LTC1065CN8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter V Low Offset Clk Sweep Bessel Filter
Lifecycle:
New from this manufacturer.
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