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LTC1066-1CSW#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC1066-1
1
10661fa
■
DC Gain Linearity: 14 Bits
■
Maximum DC Offset: ±1.5mV
■
DC Offset TempCo: 7µV/°C
■
Device Fully Tested at f
CUTOFF
= 80kHz
■
Maximum Cutoff Frequency: 120kHz (V
S
= ±8V)
■
Drives 1kΩ Load with 0.02% THD or Better
■
Signal-to-Noise Ratio: 90dB
■
Input Impedance: 500MΩ
■
Selectable Elliptic or Linear Phase Response
■
Operates from Single 5V up to ±8V Power Supplies
■
Available in an 18-Pin SO Wide Package
FREQUENCY (Hz)
100 10k 100k 1M
1066-1 TA02
1k
GAIN (dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
f
C
= 800Hz
f
C
= 80kHz
7.5V
1066-1 TA01
–7.5V
–7.5V
7.5V
V
OUT
;
V
OS(OUT)
=
2.5mV
MAX
V
IN
40kHz ≤ f
CLK
≤ 4MHz
1µF
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
15pF
OUT A
–IN A
+IN A
V
–
V
+
CONNECT 1
FILTER
OUT
50/100
CLK
V
+
OUT B
+IN B
GND
FILTER
IN
COMP 2
CONNECT 2
COMP 1
V
–
LTC1066-1
20k
30k
SHORT CONNECTION UNDER
IC AND SHIELDED BY A
GROUND PLANE
BYPASS THE POWER SUPPLIES
WITH 0.1µF DISC CERAMIC
■
Instrumentation
■
Data Acquisition Systems
■
Anti-Aliasing Filters
■
Smoothing Filters
■
Audio Signal Processing
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
14-Bit DC Accurate
Clock-Tunable, 8th Order Elliptic
or Linear Phase Lowpass Filter
Amplitude Response
Clock-Tunable, DC Accurate, 800Hz to 80kHz Elliptic Lowpass Filter
The LTC
®
1066-1 is an 8th order elliptic lowpass filter
which simultaneously provides clock-tunability and DC
accuracy. The unique and proprietary architecture of the
filter allows 14 bits of DC gain linearity and a maximum of
1.5mV DC offset. An external RC is required for DC
accurate operation. With ±7.5V supplies, a 20k resistor
and a 1µF capacitor, the cutoff frequency can be tuned
from 800Hz to 100kHz. A clock-tunable 10Hz to 100kHz
operation can also be achieved (see Typical Application
section).
The filter does not require any external active components
such as input/output buffers. The input/output impedance
is 500MΩ/0.1Ω and the output of the filter can source or
sink 40mA. When pin 8 is connected to V
+
, the clock-to-
cutoff frequency ratio is 50:1 and the input signal is
sampled twice per clock cycle to lower the risk of aliasing.
For frequencies up to 0.75f
CUTOFF
, the passband ripple is
±0.15dB. The gain at f
CUTOFF
is –1dB and the filter’s
stopband attenuation is 80dB at 2.3f
CUTOFF
. Linear phase
operation is also available with a clock-to-cutoff frequency
ratio of 100:1 when pin 8 is connected to ground.
The LTC1066-1 is available in an 18-pin SO Wide package.
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC1066-1
2
10661fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Passband Gain (0.01f
CUTOFF
to 0.25f
CUTOFF
)f
CLK
= 400kHz, f
TEST
= 2kHz ● – 0.18 0.16 0.36 dB
Passband Ripple (0.01f
CUTOFF
to 0.75f
CUTOFF
)f
CUTOFF
≤ 50kHz (See Note on Test Circuit) ±0.15 dB
for f
CLK
/f
CUTOFF
= 50:1
Gain at 0.50f
CUTOFF
for f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 400kHz, f
TEST
= 4kHz – 0.09 0.02 0.09 dB
● – 0.14 0.05 0.14 dB
f
CLK
= 2MHz, f
TEST
= 20kHz – 0.16 – 0.05 0.02 dB
● – 0.22 – 0.10 0.02 dB
Gain at 0.75f
CUTOFF
for f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 400kHz, f
TEST
= 6kHz – 0.18 – 0.05 0.05 dB
● – 0.22 – 0.10 0.05 dB
f
CLK
= 2MHz, f
TEST
= 30kHz – 0.36 – 0.20 0.05 dB
● – 0.45 – 0.30 0.05 dB
f
CLK
= 4MHz, f
TEST
= 60kHz – 0.65 – 0.30 0.25 dB
● – 0.85 – 0.40 0.75 dB
Gain at 1.00f
CUTOFF
for f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 400kHz, f
TEST
= 8kHz – 1.50 – 1.10 – 0.05 dB
● – 1.80 – 1.20 – 0.05 dB
f
CLK
= 2MHz, f
TEST
= 40kHz – 2.10 – 1.60 – 1.20 dB
● – 2.30 – 1.60 – 1.20 dB
f
CLK
= 4MHz, f
TEST
= 80kHz – 2.20 – 1.60 – 0.05 dB
● – 2.50 – 1.60 0.25 dB
Gain at 2.00f
CUTOFF
for f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 400kHz, f
TEST
= 16kHz – 56 –58 –64 dB
● –54 –57 –64 dB
f
CLK
= 2MHz, f
TEST
= 80kHz – 53 –56 –62 dB
● –51 –55 –62 dB
f
CLK
= 4MHz, f
TEST
= 160kHz – 50 –52 –60 dB
● –48 –51 –60 dB
TOP VIEW
SW PACKAGE
18-LEAD PLASTIC SO WIDE
T
JMAX
= 110°C, θ
JA
= 75°C/W
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
OUT A
–IN A
+IN A
V
–
V
+
CONNECT 1
FILTER
OUT
50/100
CLK
V
+
OUT B
+IN B
GND
FILTER
IN
COMP 2
CONNECT 2
COMP 1
V
–
ELECTRICAL CHARACTERISTICS
(See Test Circuit)
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at V
S
= ±7.5V,
R
L
= 1k, T
A
= 25°C, f
CLK
signal level is TTL or CMOS (maximum clock rise or fall time ≤ 1µs) unless otherwise specified. All AC gain
measurements are referenced to passband gain.
Total Supply Voltage (V
+
to V
–
) .......................... 16.5V
Power Dissipation............................................. 700mW
Burn-In Voltage ................................................... 16.5V
Voltage at Any Input ..... (V
–
– 0.3V) ≤ V
IN
≤ (V
+
+ 0.3V)
Maximum Clock Frequency
V
S
= ±8V ....................................................... 6.1MHz
V
S
= ±7.5V .................................................... 5.4MHz
V
S
= ±5V ....................................................... 4.1MHz
V
S
= Single 5V ............................................... 1.8MHz
Operating Temperature Range* .................. 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ABSOLUTE AXI U RATI GS
W
WW
U
(Note 1)
ORDER PART
NUMBER
LTC1066-1CSW
WU
U
PACKAGE
/
O
RDER I FOR ATIO
* For an extended operating temperature range contact LTC Marketing
for details.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
LTC1066-1
3
10661fa
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
(See Test Circuit)
The
● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at V
S
= ±7.5V,
R
L
= 1k, T
A
= 25°C, f
CLK
signal level is TTL or CMOS (maximum clock rise or fall time ≤ 1µs) unless otherwise specified. All AC gain
measurements are referenced to passband gain.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain at f
CUTOFF
for f
CLK
= 20kHz, V
S
= ±7.5V f
CLK
/f
CUTOFF
= 50:1, f
TEST
= 400Hz ● –1.75 –1.25 –0.50 dB
Gain at f
CUTOFF
for V
S
= ±2.375V, f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 1MHz, f
TEST
= 20kHz ● –1.75 –0.70 0.10 dB
Gain at 70kHz for V
S
= ±5V, f
CLK
/f
CUTOFF
= 50:1 f
CLK
= 4MHz, f
TEST
= 70kHz ● 1.00 1.40 dB
Linear Phase Response Phase at 0.25f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 1kHz –48.5 –50.0 –51.5 Deg
f
CLK
/f
CUTOFF
= 100:1, ● –48.0 –50.0 –52.0 Deg
Pin 8 at GND Gain at 0.25f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 1kHz ● –0.65 –0.25 0.25 dB
Phase at 0.50f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 2kHz –97.5 –99.5 – 101.5 Deg
● –97.0 –99.5 – 102.0 Deg
Gain at 0.50f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 2kHz ● –0.75 –0.50 –0.10 dB
Phase at 0.75f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 3kHz – 148.0 – 150.5 – 152.5 Deg
● – 147.5 – 150.5 – 153.0 Deg
Gain at 0.75f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 3kHz ● –1.40 –1.00 –0.60 dB
Phase at f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 4kHz – 208.0 – 210.0 – 212.5 Deg
● – 207.5 – 210.0 – 213.0 Deg
Gain at f
CUTOFF
f
CLK
= 400kHz, f
TEST
= 4kHz ● –2.10 –1.80 –1.60 dB
Input Bias Current V
S
= ±2.375V 60 nA
● 70 135 nA
Input Offset Current V
S
= ±2.375V ● ±10 ±40 nA
V
S
≥ ±5V (Note 3) ● ±10 ±45 nA
Input Offset Current TempCo ±2.375V ≤ V
S
≤ ±7.5V 40 pA/°C
Output Voltage Offset TempCo ±2.375V ≤ V
S
≤ ±7.5V 7 µV/°C
Output Offset Voltage V
S
= ±2.375V, f
CLK
= 400kHz ±0.5 mV
● ±1.0 ±1.5 mV
V
S
≥ ±5V ±0.5 mV
(Note 3) ● ±1.0 ±1.5 mV
Common Mode Rejection V
S
= ±7.5V 90 96 dB
V
CM
= –5V to 5V ● 84 90 dB
Power Supply Rejection V
S
= ±2.5V to ±7.5V 80 84 dB
● 78 82 dB
Input Voltage Range and Output Voltage Swing V
S
= ±2.375V, R
L
= 1k ±1.2 ±1.4 V
● ±1.1 V
V
S
= ±5V, R
L
= 1k ±3.4 ±3.6 V
● ±3.2 V
V
S
= ±7.5V, R
L
= 1k ±5.4 ±5.8 V
● ±5.0 V
Output Short-Circuit Current ±2.375V ≤ V
S
≤ ±7.5V ± 20 mA
Power Supply Current (Note 2) V
S
= ±2.375V 14 16 mA
● 16 19 mA
V
S
= ±5V 22 26 mA
● 23 29 mA
V
S
= ±7.5V 25 30 mA
● 26 33 mA
Power Supply Range ±2.375 ±8V
E
LECTR
IC
AL C CHARA TERIST
ICS
Note 2: The maximum current over temperature is at 0°C. At 70°C the
maximum current is less than its maximum value at 25°C.
Note 3: Guaranteed by design and test correlation.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC1066-1CSW#TRPBF

Mfr. #:
Buy LTC1066-1CSW#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter 14-Bit DC Acc. 8th Order LP Filter
Lifecycle:
New from this manufacturer.
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