LT1567
1
1567fa
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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 (f
C
) 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.
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
2MHz 3-Pole Antialias Filter with
Single-Ended to Differential Conversion
Frequency Response
Single-Ended to Differential Conversion
Low Noise: 1.4nV/Hz
20µV
RMS
Total Wideband Noise in Filter
with 2MHz f
C
Dynamic Range: 104dB SNR at ±5V
Total Supply Voltage: 2.7V to 12V
Rail-to-Rail Outputs
DC Accurate: Op Amp V
OS
0.5mV (Typ)
Trimmed Bandwidth for Accurate Filters
No External Clock Required
MSOP-8 Surface Mount Package
1.4nV/Hz 180MHz
Filter Building Block
FREQUENCY (Hz)
100
GAIN (dB)
12
6
0
–6
–12
–18
–24
–30
–36
1M 10M
1567 TA01a
NOTE: 6dB GAIN RESULTS FROM
SINGLE-ENDED TO DIFFERENTIAL
CONVERSION
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
–A
IN
+A
IN
ADC
1567 TA01
V
IN
0.1µF
0.1µF
C1
270pF
C3
270pF
C2
270pF
0.1µF
V
V
+
1
2
3
4
8
7
6
5
R2
536
R3
147
R1
536
R4
147
R5
147
LTC1420
96dB DIFFERENTIAL SNR WITH 3V TOTAL SUPPLY
LT1567
R2
R1
GAIN =
2.5MHz
f
–3dB
R3 = R4 = R5, C1 = C2 = C3
1.82
2πR2C2
f
–3dB
= = f
–3dB
2.5MHz;
1
4πR3C3
LT1567
2
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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
ORDER PART
NUMBER
MS8 PART MARKING
T
JMAX
= 150°C, θ
JA
= 200°C/W
LTWH
LTWJ
LT1567CMS8
LT1567IMS8
(Note 1)
The
denotes the specifications that apply over the full operating temperature range (Note 4), otherwise specifications and typical
values are at T
A
= 25°C. V
S
= ±2.5V, R
L
= 1K, V
OUT
= 0 on both amplifiers unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Total Supply Voltage 2.7 12 V
Supply Current V
S
= ±1.5V 8.5 15 mA
V
S
= ±2.5V 916 mA
V
S
= ±5V 11 19 mA
OA Output Positive Voltage Swing V
S
= ±1.5V, R
L
= 1k 1.30 1.45 V
V
S
= ±2.5V, R
L
= 1k 2.20 2.45 V
V
S
= ±2.5V, R
L
=100 1.90 2.25 V
V
S
= ±5V, R
L
= 1k 4.70 4.90 V
OA Output Negative Voltage Swing V
S
= ±1.5V, R
L
= 1k 1.30 1.45 V
V
S
= ±2.5V, R
L
= 1k 2.20 2.45 V
V
S
= ±2.5V, R
L
=100 2.00 2.30 V
V
S
= ±5V, R
L
= 1k 4.70 4.90 V
INV Output Positive Voltage Swing V
S
= ±1.5V, R
L
= 1k 1.30 1.40 V
V
S
= ±2.5V, R
L
= 1k 2.20 2.50 V
V
S
= ±2.5V, R
L
= 100 (LT1567I Only, Note 5) 1.80 2.00 V
V
S
= ±5V, R
L
= 1k 4.60 4.80 V
INV Output Negative Voltage Swing V
S
= ±1.5V, R
L
= 1k 1.30 1.40 V
V
S
= ±2.5V, R
L
= 1k 2.20 2.40 V
V
S
= ±2.5V, R
L
= 100 (LT1567I Only, Note 5) 1.80 2.00 V
V
S
= ±5V, R
L
= 1k 4.50 4.80 V
Common Mode Input Voltage Range (DC BIAS, Pin 5) V
S
= ±1.5V, CMRR 40dB (Note 6) 0.5 0.5 V
(See Pin Functions) V
S
= ±5V, CMRR 40dB (Note 6) 3.8 3.5 V
DC Common Mode Rejection Ratio (CMRR) V
S
= ±1.5V, DC BIAS = –0.25V to 0.25V 80 dB
V
S
= ±5V, DC BIAS = –2.5V to 2.5V 65 90 dB
DC Power Supply Rejection Ratio (PSRR) V
S
= ±1.5V to ±5V, DC BIAS = 0V 80 100 dB
OA Input Offset Voltage 0.5 3 mV
INV Output Offset Voltage 59 mV
Consult LTC Marketing for parts specified with wider operating temperature ranges.
1
2
3
4
OAOUT
OAIN
BYPASS
V
8
7
6
5
V
+
INVOUT
INVIN
DC BIAS
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
ELECTRICAL CHARACTERISTICS
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/
LT1567
3
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Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The inputs of each op amp are protected by back-to-back diodes
and diodes to each supply. If either input exceeds the supply or the
differential input voltage exceeds 1.4V, the input current should be limited
to less than 25mA.
Note 3: The LT1567C and LT1567I are guaranteed functional over the
operating temperature range –40°C to 85°C.
Note 4: The LT1567C is guaranteed to meet specified performance from
0°C to 70°C. The LT1567C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but not tested or QA
sampled at these temperatures. The LT1567I is guaranteed to meet
specified performance from –40°C to 85°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
OA Input Bias Current 310 µA
DC BIAS Input Bias Current 615 µA
OA DC Open-Loop Gain V
S
= ±1.5V, R
L
= 1k, V
O
= –1V to 1V 7.5 55 V/mV
V
S
= ±2.5V, R
L
= 1k, V
O
= –2V to 2V 10 60 V/mV
V
S
= ±2.5V, R
L
= 100, V
O
= –1.5V to 1.5V 1.2 7.0 V/mV
V
S
= ±5V, R
L
= 1k, V
O
= –4V to 4V 10 80 V/mV
INV DC Gain V
S
= ±1.5V, R
L
= 1k, V
IN
= –1V to 1V 0.97 1.04 V/V
V
S
= ±2.5V, R
L
= 1k, V
IN
= –2V to 2V 0.97 1.04 V/V
V
S
= ±2.5V, R
L
= 100, V
IN
= –1.5V to 1.5V 0.97 1.04 V/V
V
S
= ±5V, R
L
= 1k, V
IN
= –4V to 4V 0.97 1.04 V/V
INV DC Input Resistance V
S
= ±2.5V, R
L
= 1k, V
IN
= –2V to 2V 450 600 750
OA Gain Bandwidth Product Measured at 2MHz, V
S
= ±1.5V 100 180 MHz
Measured at 2MHz, V
S
= ±2.5V 110 185 MHz
Measured at 2MHz, V
S
= ±5V 120 190 MHz
INV Bandwidth –3dB 85 MHz
INV AC Gain Measured at 2MHz 0.96 1.0 1.05 V/V
OA Slew Rate V
S
= ±5V 55 V/µs
INV Slew Rate V
S
= ±5V 90 V/µs
OA Input Voltage Noise Density (Note 7) f = 100kHz 1.4 nV/Hz
OA Input Current Noise Density f = 100kHz 1.0 pA/Hz
Wideband Output Noise for a Second Order Filter (Figure 1) f
C
= 2MHz, BW = 4MHz (Note 8) 20 µV
RMS
f
C
= 5MHz, BW = 10MHz (Note 8) 30 µV
RMS
Total Harmonic Distortion (THD) f = 1MHz, f
C
= 2MHz, V
OUT
= 1V
RMS
–88 dB
for a Second Order Filter (Figure 1) f = 2.5MHz, f
C
= 5MHz, V
OUT
= 1V
RMS
–70 dB
Output Short-Circuit Current (Note 9) 850 mA
OA Output Impedance f = 100kHz, OA Connected as 0.03
Unity-Gain Inverter
INV Output Impedance f = 100kHz 0.7
Note 5: With INVIN pin driven to ±2V.
Note 6: This parameter is not 100% tested.
Note 7: The input referred voltage noise density of the unity gain inverter
is 5.6nV/Hz which includes the noise of the gain setting resistors.
Note 8: For f
C
= 2MHz, C1 = C2 = 180pF, R1 = R2 = 604, R3 = 316 and
for f
C
= 5MHz, C1 = C2 = 180pF, R1 = R2 = 232, R1 = 130. BW is the
bandwidth of the noise measurement (Figure 1 circuit).
Note 9: Under direct short circuit conditions, with T
A
< 25°C the output
current is reduced.
ELECTRICAL CHARACTERISTICS
The denotes the specifications that apply over the full operating temperature range (Note 4), otherwise specifications and typical
values are at T
A
= 25°C. V
S
= ±2.5V, R
L
= 1K, V
OUT
= 0 on both amplifiers unless otherwise noted.

LT1567CMS8#TRPBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Active Filter 1.4nV/Rt.Hz 180MHz Filt Building Block
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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