LTC1563-2 LINER [Linear Technology], LTC1563-2 Datasheet
LTC1563-2
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LTC1563-2 Summary of contents
Page 1
... RC lowpass filters with rail-to-rail C inputs and outputs and low DC offset suitable for systems with a resolution bits. The LTC1563-2, with a single resistor value, gives a unity-gain Butterworth response. The LTC1563-3, with a single resistor value, gives a unity-gain Bessel response. The proprietary ...
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... 25° Single 4.75V, EN pin to logic “low,” Gain = speed (HS) and low power (LP) modes unless otherwise noted. PARAMETER Specifications for Both LTC1563-2 and LTC1563-3 Total Supply Voltage ( Mode S Total Supply Voltage ( Mode ...
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... Power Supply Current, LP Mode Shutdown Mode Supply Current EN Input Logic Low Level EN Input Logic High Level LP Logic Low Level LP Logic High Level LTC1563-2 Transfer Function Characteristics Cutoff Frequency Range Mode (Note 2) Cutoff Frequency Range Mode (Note 2) Cutoff Frequency Accuracy, HS Mode ...
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... LTC1563-2/LTC1563-3 ELECTRICAL CHARACTERISTICS ● The denotes specifications which apply over the full operating temperature range, otherwise specifications are 25° Single 4.75V, EN pin to logic “low,” Gain = speed (HS) and low power (LP) modes unless otherwise noted. PARAMETER Passband Gain, HS Mode ...
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... SUPPLY –70 – 25.6kHz C –90 HIGH SPEED MODE f = 5kHz IN –100 0 INPUT VOLTAGE (V ) P-P 1563 G08 LTC1563-2/LTC1563-3 Output Voltage Swing High vs Load Resistance 5.5 = ± 5.0 4.5 HS MODE 4.0 LP MODE 3.5 3.0 2.5 100 1k 10k LOAD RESISTANCE—LOAD TO GROUND (Ω) 1563 G03 Output Voltage Swing Low vs Load Resistance – ...
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... LTC1563-2/LTC1563 TYPICAL PERFOR A CE CHARACTERISTICS THD + Noise vs Input Frequency – SINGLE 3.3V S LOW POWER MODE f = 25.6kHz C –70 1V P-P –80 2V P-P –90 –100 INPUT FREQUENCY (kHz) 1563 G10 THD + Noise vs Input Frequency – SINGLE 5V S LOW POWER MODE f = 25.6kHz C –70 1V P-P –80 2V P-P –90 ...
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... HS MODE 0 100 f (Hz) C Stopband Gain vs Input Frequency 256kHz 0 C –10 –20 –30 LTC1563-2 LTC1563-3 –40 –50 –60 –70 –80 –90 10k 100k 1M 10M FREQUENCY (Hz) Crosstalk Rejection vs Frequency DUAL SECOND ORDER BUTTERWORTH f = 256kHz C HIGH SPEED MODE 1k 10k 100k ...
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... LTC1563-2/LTC1563 PIN FUNCTIONS LP (Pin 1): Low Power. The LTC1563-X has two operating modes: Low Power and High Speed. Most applications will use the High Speed operating mode. Some lower fre- quency, lower gain applications can take advantage of the Low Power mode. When placed in the Low Power mode, the supply current is nearly an order of magnitude lower than the High Speed mode ...
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... V 15 0.1µ DIGITAL GROUND PLANE (IF ANY) 1563 PF01 R21 R11 R31 C1A – LPA 6 INVA C2A + AGND LTC1563-X LTC1563-2/LTC1563-3 LTC1563-X ANALOG GROUND 2 15 PLANE SA LPB INVA INVB LPA ...
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... Functional Description The LTC1563-2/LTC1563-3 are a family of easy-to-use, 4th order lowpass filters with rail-to-rail operation. The LTC1563-2, with a single resistor value, gives a unity-gain filter approximating a Butterworth response. The LTC1563-3, with a single resistor value, gives a unity-gain filter approximating a Bessel (linear phase) response. The ...
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... Figure 3 illustrates another way of making odd order filters. The R1 input resistor is split into two parts with an additional capacitor connected to ground in between the resistors. This “TEE” network forms a single real pole. RB1 LTC1563-2/LTC1563-3 R11 LTC1563-X R12 Figure 1. PC Board Layout ...
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... S INV C1 – AGND 1/2 LTC1563 –R2 DC GAIN = LTC1563-2: C1A = 53.9pF, C1B = 39.2pF R1 LTC1563-3: C1A = 35pF, C1B = 26.8pF 2π • R2 • C1 Figure 2 You can also use the TEE network in both sections of the part to make a 6th order filter. This 6th order filter does not conform exactly to the textbook responses ...
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... CHEBYSHEV NORMALIZED 1Hz C –10 0.1 FREQUENCY (Hz) Figure 5b. Passband Frequency Response Table 1. Resistor Values, Normalized to 256kHz Cutoff Frequency (f Gain, of the 4th Order LTC1563-2 Lowpass Filter, Is Set to Unity. (Note 1) LP Mode Max Mode Max f C R11 = R21 = R31 = R12 = R22 = R32 = Example mode, 0.1dB ripple Chebyshev, 100kHz cutoff frequency, R11 = R21 = 35k ≅ 34.8k (1%), R31 = 27.39k ≅ ...
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... LTC1563-2/LTC1563 APPLICATIONS INFORMATION 4th Order Filter Responses Using the LTC1563-3 LTC1563 LPB R31 4 13 INVA INVB R21 6 11 LPA AGND NC R11 8 9 – Figure 6. 4th Order Filter Connections (Power Supply, Ground, EN and LP Connections Not Shown for Clarity) ...
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... FREQUENCY (kHz) 1563 TA06 LTC1563-2/LTC1563-3 Frequency Response 100 FREQUENCY (kHz) 1563 TA04 3.3V 0.1µF LTC1563 OUT 158k 15 SA LPB 100k 13 INVA INVB LPA SB 10 ...
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... Click on the Implement button the filter implementation stage the Enhanced Implement window, click on the Active RC button to choose the LTC1563-2 part. You are now done with the filter’s implementation. Click on the schematic button to view the resulting circuit. Frequency Response ...
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... Point FFT of the Output Data 292.6kHz SAMPLE f = 20kHz IN –20 SINAD = 85dB THD = –91.5dB –40 –60 –80 –100 –120 –140 0 36.58 73.15 109.73 FREQUENCY (kHz) LTC1563-2/LTC1563-3 10µF + LTC1604 10Ω – SHDN REF ...
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... Implement button the filter implementa- tion stage the Enhanced Implement window, click on the Active RC button and choose the LTC1563-2 part. Click on the schematic button to view the resulting circuit. 9. You now have the schematic for the 4th order lowpass part of the design ...
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... BSC .015 ± .004 × 45° .0532 – .0688 (0.38 ± 0.10) (1.35 – 1.75) 0° – 8° TYP .008 – .012 (0.203 – 0.305) TYP LTC1563-2/LTC1563 –10 –20 –30 –40 –50 –60 –70 10k 100k ...
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... V EN 31.6k GAIN MAXIMUM GAIN = 120kHz/f CENTER 4.99k • • CENTER CENTER Single Supply, 100kHz, Elliptic Lowpass Filter Maximum Fcutoff = 120kHz LTC1563 32. LPB 15k 4 13 INVA INVB ...