LTC1068CG#PBF Linear Technology, LTC1068CG#PBF Datasheet
LTC1068CG#PBF
Specifications of LTC1068CG#PBF
Available stocks
Related parts for LTC1068CG#PBF
LTC1068CG#PBF Summary of contents
Page 1
... LTC1068 family product can be obtained in a 16-lead SO package with internal thin-film resistors. Please contact LTC Marketing for details. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. FilterCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. RMS R12 14k ...
Page 2
LTC1068 Series BSOLUTE – Total Supply Voltage ( .............................. 12V Power Dissipation ............................................. 500mW – 0.3V ≤ V – Input Voltage at Any Pin .... V Storage Temperature Range ...
Page 3
ELECTRICAL CHARACTERISTICS over the full operating temperature range, otherwise specifications are at V PARAMETER Clock-to-Center Frequency Ratio (Note 5) Clock-to-Center Frequency Ratio, Side-to-Side Matching (Note 5) Q Accuracy (Note 5) f Temperature Coefficient O Q Temperature Coefficient DC Offset Voltage ...
Page 4
LTC1068 Series ELECTRICAL CHARACTERISTICS apply over the full operating temperature range, otherwise specifications are at V PARAMETER Clock-to-Center Frequency Ratio, Side-to-Side Matching (Note 5) Q Accuracy (Note 5) f Temperature Coefficient O Q Temperature Coefficient DC Offset Voltage (Note 5) ...
Page 5
ELECTRICAL CHARACTERISTICS apply over the full operating temperature range, otherwise specifications are at V PARAMETER f Temperature Coefficient O Q Temperature Coefficient DC Offset Voltage (Note 5) (See Table 1) Clock Feedthrough Max Clock Frequency (Note 6) Power Supply Current ...
Page 6
LTC1068 Series ELECTRICAL CHARACTERISTICS apply over the full operating temperature range, otherwise specifications are at V PARAMETER DC Offset Voltage (Note 5) (See Table 1) Clock Feedthrough Max Clock Frequency (Note 6) Power Supply Current Note 1: Stresses beyond those ...
Page 7
W U TYPICAL PERFORMANCE CHARACTERISTICS LTC1068-200 Maximum Q vs Center Frequency (Modes 3.3V 1.2MHz S CLK(MAX 5V 3.2MHz S CLK(MAX) = ± 5V ...
Page 8
LTC1068 Series W U TYPICAL PERFORMANCE CHARACTERISTICS LTC1068/LTC1068-200 Noise vs Q 300 250 200 150 ± 100 3. 1068 G13 Noise Increase vs R2/R4 Ratio (Mode ...
Page 9
PIN FUNCTIONS Power Supply Pins + – The V and V pins should each be bypassed with a 0.1µF capacitor to an adequate analog ground. The filter’s power supplies should be isolated from other digital or high ...
Page 10
LTC1068 Series PIN FUNCTIONS path. A 200Ω resistor between clock source and Pin 11 will slow down the rise and fall times of the clock to further reduce charge coupling (Figures 1 and 2). Output Pins Each ...
Page 11
... For a complete listing of all the operating modes, consult the appendices of the FilterCAD manual or the Help files in FilterCAD. FilterCAD can be obtained free of charge on the Linear Technology web site (www.linear.com) or you can order the FilterCAD CD-ROM by contacting Linear Tech- nology Marketing. U ...
Page 12
LTC1068 Series W MODES OF OPERATION – V – Σ + AGND √ CLK RATIO (R6 + R5) √ ...
Page 13
... Demonstration Circuit 104 DC104 is a surface mount printed circuit board for the evaluation of Linear Technology’s LTC1068 product fam- ily in a 28-lead SSOP package. The LTC1068 product family consists of four monolithic clock-tunable filter building blocks. ...
Page 14
LTC1068 Series U U APPLICATIONS INFORMATION supply inputs to the board. Jumpers JPA to JPD on the board configure the filter’s second order circuit modes, jumper JP1 configures the filter for dual or single supply operation and jumpers JP2 (A-D) ...
Page 15
U U APPLICATIONS INFORMATION W U LTC1068 Series 1068fb 15 ...
Page 16
LTC1068 Series U U APPLICATIONS INFORMATION A Surface Mount Printed Circuit Layout A very compact surface mount printed circuit layout can be designed with 0603 size surface mount resistors, capacitors and a 28-pin SSOP of the LTC1068 product family. An ...
Page 17
U U APPLICATIONS INFORMATION R51 R61 Component Side R11 R51 R21 R31 R61 R41 GND R43 R33 R23 Surface Mount Components (Board Area = 1" × 0.8") R R11 H1 ...
Page 18
LTC1068 Series U TYPICAL APPLICATIONS LTC1068-200 8th Order Linear Phase Lowpass, f for Ultralow Frequency Applications R L1 23.2k 1 INV B INV C R21 12.4k 2 R11 HPB/NB HPC/NC 14.3k R31 10k 3 V BPB BPC IN R41 15.4k ...
Page 19
U TYPICAL APPLICATIONS LTC1068-50 8th Order Linear Phase Lowpass, f for Single Supply Low Power Applications. Maximum f 20kHz with a 3.3V Supply and 40kHz with a 5V Supply R A1 56. 13.3k 1 INV B R21 20.5k ...
Page 20
LTC1068 Series U TYPICAL APPLICATIONS LTC1068-25 8th Order Lowpass, f Attenuation – 50dB at (1.25)(f (1.5)(f ). Maximum f CUTOFF 26.7k 1 INV B R21 10k 2 HPB/NB R11 32.4k R31 10k 3 BPB V IN ...
Page 21
U TYPICAL APPLICATIONS LTC1068 8th Order Linear Phase Bandpass, f Passband – 3dB at (0.88)(f CENTER = 40kHz with ±5V Supplies f CENTER R L1 63. 7.5k 1 INV B R21 4.99k 2 HPB/NB R11 R31 26.1k 19.6k ...
Page 22
LTC1068 Series U TYPICAL APPLICATIONS LTC1068 8th Order Linear Phase Bandpass, f Passband – 3dB at (0.88)(f CENTER = 50kHz with ±5V Supplies f CENTER R L1 24.9k 1 INV B R21 10k 2 HPB/NB R31 R11 24.3k 25.5k 3 ...
Page 23
U TYPICAL APPLICATIONS LTC1068 8th Order Linear Phase Bandpass, f Passband – 3dB at (0.7)(f ) and (1.3)(f CENTER Burst Response, Maximum f CENTER R L1 348k 1 INV B R21 14.7k 2 HPB/NB R31 R11 10k 11k 3 BPB ...
Page 24
LTC1068 Series U TYPICAL APPLICATIONS LTC1068-50 8th Order Linear Phase Bandpass, f Passband – 3dB at (0.8)(f ) and (1.2)(f CENTER Low Power Applications. Maximum f Supply INV B R21 10k 2 HPB/NB R11 36.5k R31 30.1k ...
Page 25
U TYPICAL APPLICATIONS LTC1068-25 8th Order Bandpass, f Passband – 3dB at (0.965)(f = 80kHz with ±5V Supplies Maximum f CENTER INV B R21 4.99k 2 HPB/NB R11 121k R31 97.6k 3 BPB LPB ...
Page 26
LTC1068 Series U TYPICAL APPLICATIONS LTC1068-200 8th Order Highpass, f Attenuation – 60dB at (0.6)(f = 20kHz with ±5V Supplies Maximum f CUTOFF 66.5k 1 INV B R21 10k 2 HPB/NB R11 18.2k R31 16.5k 3 ...
Page 27
... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 28
... CLK NOTCH R64 7.87k R54 5.11k R34 75k R R24 7.32k G 15k R 5.11k H4 – R 475k L4 LT1354 + 1068 TA27 = Up to ±7.5V Ratios 100kHz ± ±7.5V Ratios 20kHz ±7.5V Ratio 200kHz 0506 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1996 V OUT 1068fb ...