LT1567_1 LINER [Linear Technology], LT1567_1 Datasheet

no-image

LT1567_1

Manufacturer Part Number
LT1567_1
Description
1.4nV/?Hz 180MHz Filter Building Block
Manufacturer
LINER [Linear Technology]
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
V
IN
Single-Ended to Differential Conversion
Low Noise: 1.4nV/√Hz
20µV
with 2MHz f
Dynamic Range: 104dB SNR at ±5V
Total Supply Voltage: 2.7V to 12V
Rail-to-Rail Outputs
DC Accurate: Op Amp V
Trimmed Bandwidth for Accurate Filters
No External Clock Required
MSOP-8 Surface Mount 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
270pF
536Ω
R1
C1
RMS
96dB DIFFERENTIAL SNR WITH 3V TOTAL SUPPLY
GAIN =
R3 = R4 = R5, C1 = C2 = C3
f
–3dB
Total Wideband Noise in Filter
=
536Ω
147Ω
R2
R3
2πR2C2
R2
R1
Single-Ended to Differential Conversion
0.1µF
C
1.82
≤ 2.5MHz
2MHz 3-Pole Antialias Filter with
0.1µF
f
–3dB
270pF
U
=
C2
4πR3C3
V
1
1
2
3
4
;
OS
f
–3dB
LT1567
0.5mV (Typ)
≤ 2.5MHz
U
8
7
6
5
1567 TA01
V
+
147Ω
270pF
0.1µF
147Ω
R4
R5
C3
+A
–A
LTC1420
IN
IN
ADC
DESCRIPTIO
The LT
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
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.
All other trademarks are the property of their respective owners.
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
®
1567 is an analog building block optimized for
–12
–18
–24
–30
–36
12
–6
6
0
100
Filter Building Block
NOTE: 6dB GAIN RESULTS FROM
SINGLE-ENDED TO DIFFERENTIAL
CONVERSION
1.4nV/√Hz 180MHz
U
Frequency Response
C
) up to 5MHz, ideal for antialias-
FREQUENCY (Hz)
1M
1567 TA01a
LT1567
10M
1567fa
1

Related parts for LT1567_1

LT1567_1 Summary of contents

Page 1

FEATURES ■ Single-Ended to Differential Conversion ■ Low Noise: 1.4nV/√Hz ■ 20µV Total Wideband Noise in Filter RMS with 2MHz f C Dynamic Range: 104dB SNR at ±5V ■ ■ Total Supply Voltage: 2.7V to 12V ■ Rail-to-Rail Outputs ■ ...

Page 2

LT1567 ABSOLUTE AXI U RATI GS (Note 1) + – Total Supply Voltage ( ............................ 12.6V Input Current (Note 2) ........................................ ±25mA Operating Temperature Range (Note 3) LT1567C ..............................................–40°C to 85°C LT1567I ...............................................–40°C to ...

Page 3

ELECTRICAL CHARACTERISTICS The ● denotes the specifications that apply over the full operating temperature range (Note 4), otherwise specifications and typical = ±2.5V, R values are 25° PARAMETER OA Input Bias Current DC ...

Page 4

LT1567 W U TYPICAL PERFOR A CE CHARACTERISTICS OA Open-Loop Gain and Phase vs Frequency –10 –20 –30 0 FREQUENCY (MHz) Closed-Loop Gain and Phase of OA and INV vs ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Output Impedance vs Frequency 100 = ± 25° –10 V INVERTER –1 V 0.01 0.001 100k 1M 10M 100M ...

Page 6

LT1567 CTIO S OAOUT (Pin 1): Output of the Uncommitted Op Amp (OA). As with most wideband op amps important to avoid connecting heavy capacitive loads (above about 10pF) directly to this output. ...

Page 7

W BLOCK DIAGRA OAOUT OAIN BYPASS – + INV 2 – 3 7pF 150Ω – 4 LT1567 + INVOUT 600Ω 600Ω 6 INVIN DC BIAS 5 1567 BD 1567fa 7 ...

Page 8

LT1567 U U APPLICATIO S I FOR ATIO Functional Description The LT1567 contains two low noise rail-to-rail output, wideband operational amplifiers, one of them connected internally as a unity-gain inverter. These two amplifiers can form a second order multiple feedback ...

Page 9

U U APPLICATIO S I FOR ATIO The simple-to-use spreadsheet requires the user to de- fine the desired corner (or center) frequency, the pass- band gain and a capacitor value for a choice of second or third order Chebyshev or ...

Page 10

LT1567 U U APPLICATIO S I FOR ATIO output from the INV block (Pin 7). These two outputs maintain equal gain and 180º phase shift over a wide frequency range. This feature permits choosing the signal polarity in single ended ...

Page 11

U U APPLICATIO S I FOR ATIO 0.1µ REF Figure 3. A Single Ended to Differential Amplifier LT1567 600Ω 600Ω 2 – – 7pF 150Ω + – ...

Page 12

LT1567 U U APPLICATIO S I FOR ATIO Figure 4 shows an LT1567 single supply differential buffer driving a differential 1st order RC filter. The V is subject to the common mode (DC BIAS) limits in the spec table. Within ...

Page 13

U U APPLICATIO S I FOR ATIO V IN2 R1 V IN1 V REF WITH R3 AND R1 EQUAL, V GAIN FROM ( 604Ω, THEN NOISE ...

Page 14

LT1567 U U APPE DIX: OUTPUT OISE VERTI G A PLIFIER NOISE THEN the voltage noise density in V/√Hz at the inverter’s ON output. V ...

Page 15

PACKAGE DESCRIPTIO 5.23 (.206) MIN 0.42 ± 0.038 (.0165 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) GAUGE PLANE 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS ...

Page 16

LT1567 U TYPICAL APPLICATIO 649Ω 40.2Ω 604Ω 90.9Ω 2200pF 220pF RELATED PARTS PART NUMBER DESCRIPTION ® LTC 1560-1 1MHz/500kHz Continuous Time, Lowpass Elliptic Filter LTC1562/LTC1562-2 Universal 8th Order Active RC Filters LTC1563-2/LTC1563-3 4th Order Active RC Lowpass Filters ...

Related keywords