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Linear Technology Electronic Components Datasheet

LT1567 Datasheet

Filter Building Block

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LT1567
1.4nV/Hz 180MHz
Filter Building Block
FEATURES
Single-Ended to Differential Conversion
Low Noise: 1.4nV/Hz
20µVRMS Total Wideband Noise in Filter
with 2MHz fC
Dynamic Range: 104dB SNR at ±5V
Total Supply Voltage: 2.7V to 12V
Rail-to-Rail Outputs
DC Accurate: Op Amp VOS 0.5mV (Typ)
Trimmed Bandwidth for Accurate Filters
No External Clock Required
MSOP-8 Surface Mount Package
U
APPLICATIO S
Low Noise, High Speed Filters to 5MHz
Low Noise Differential Circuits
Communication Channel or Roofing Filters
Antialias or Reconstruction Filtering
Video Signal Processing
Single-Ended to Differential Conversion
DESCRIPTIO
The LT®1567 is an analog building block optimized for
very low noise high frequency filter applications. It con-
tains two wideband rail-to-rail operational amplifiers, one
of them internally configured as a unity-gain inverter.
With the addition of a few passive components, the
LT1567 becomes a flexible second order filter section
with cutoff frequency (fC) up to 5MHz, ideal for antialias-
ing or for channel filtering in high speed data communi-
cations systems. A spreadsheet-based design tool is
available at www.linear.com for designing lowpass and
bandpass filters using the LT1567.
In addition to low noise and high speed, the LT1567
features single-ended to differential conversion for direct
driving of high speed differential input A/D converters. The
LT1567 operates from a total power supply voltage of 2.7V
to 12V and supports signal-to-noise ratios above 100dB.
The LT1567 is available in an 8-lead MSOP package.
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
R1
536
VIN
C1
270pF
2MHz 3-Pole Antialias Filter with
Single-Ended to Differential Conversion
R2
536
V+
0.1µF
R3
147
C2
270pF
1
0.1µF
2
3 LT1567
8
7
6
R4
147
C3
270pF
0.1µF
4
5 R5
147
1567 TA01
V
96dB DIFFERENTIAL SNR WITH 3V TOTAL SUPPLY
GAIN
=
R2
R1
2.5MHz
f–3dB
R3 = R4 = R5, C1 = C2 = C3
f–3dB
=
1.82
2πR2C2
=
1;
4πR3C3
f–3dB
2.5MHz
+AIN
ADC
–AIN
LTC1420
Frequency Response
12
6
0
–6
–12
–18
–24
NOTE: 6dB GAIN RESULTS FROM
–30 SINGLE-ENDED TO DIFFERENTIAL
CONVERSION
–36
100 1M
FREQUENCY (Hz)
10M
1567 TA01a
1567fa
1


Linear Technology Electronic Components Datasheet

LT1567 Datasheet

Filter Building Block

No Preview Available !

LT1567
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V) ............................ 12.6V
Input Current (Note 2) ........................................ ±25mA
Operating Temperature Range (Note 3)
LT1567C ..............................................–40°C to 85°C
LT1567I ...............................................–40°C to 85°C
Specified Temperature Range (Note 4)
LT1567C ..............................................–40°C to 85°C
LT1567I ...............................................–40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
OAOUT 1
OAIN 2
BYPASS 3
V4
TOP VIEW
8 V+
7 INVOUT
6 INVIN
5 DC BIAS
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 200°C/W
ORDER PART
NUMBER
LT1567CMS8
LT1567IMS8
MS8 PART MARKING
LTWH
LTWJ
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The denotes the specifications that apply over the full operating temperature range (Note 4), otherwise specifications and typical
values are at TA = 25°C. VS = ±2.5V, RL = 1K, VOUT = 0 on both amplifiers unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Total Supply Voltage
2.7 12 V
Supply Current
OA Output Positive Voltage Swing
OA Output Negative Voltage Swing
INV Output Positive Voltage Swing
INV Output Negative Voltage Swing
Common Mode Input Voltage Range (DC BIAS, Pin 5)
(See Pin Functions)
DC Common Mode Rejection Ratio (CMRR)
DC Power Supply Rejection Ratio (PSRR)
OA Input Offset Voltage
VS = ±1.5V
VS = ±2.5V
VS = ±5V
VS = ±1.5V, RL = 1k
VS = ±2.5V, RL = 1k
VS = ±2.5V, RL=100
VS = ±5V, RL = 1k
VS = ±1.5V, RL = 1k
VS = ±2.5V, RL = 1k
VS = ±2.5V, RL=100
VS = ±5V, RL = 1k
VS = ±1.5V, RL = 1k
VS = ±2.5V, RL = 1k
VS = ±2.5V, RL = 100 (LT1567I Only, Note 5)
VS = ±5V, RL = 1k
VS = ±1.5V, RL = 1k
VS = ±2.5V, RL = 1k
VS = ±2.5V, RL = 100 (LT1567I Only, Note 5)
VS = ±5V, RL = 1k
VS = ±1.5V, CMRR 40dB (Note 6)
VS = ±5V, CMRR 40dB (Note 6)
VS = ±1.5V, DC BIAS = –0.25V to 0.25V
VS = ±5V, DC BIAS = –2.5V to 2.5V
VS = ±1.5V to ±5V, DC BIAS = 0V
1.30
2.20
1.90
4.70
–1.30
–2.20
–2.00
–4.70
1.30
2.20
1.80
4.60
–1.30
–2.20
–1.80
–4.50
–0.5
–3.8
80
65
80
8.5
9
11
1.45
2.45
2.25
4.90
– 1.45
– 2.45
– 2.30
– 4.90
1.40
2.50
2.00
4.80
– 1.40
– 2.40
– 2.00
– 4.80
90
100
0.5
15
16
19
0.5
3.5
3
mA
mA
mA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
dB
dB
dB
mV
INV Output Offset Voltage
59
mV
1567fa
2


Part Number LT1567
Description Filter Building Block
Maker Linear
PDF Download

LT1567 Datasheet PDF






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