lt1567 Linear Technology Corporation, lt1567 Datasheet
lt1567
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lt1567 Summary of contents
Page 1
... 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. ...
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... ±2.5V =100 ±5V ±1.5V ±2.5V ±2.5V 100 (LT1567I Only, Note ±5V ±1.5V ±2.5V ±2.5V 100 (LT1567I Only, Note ±5V ± ...
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... 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° ...
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 Frequency ( PHASE –2 INV OUT –4 –6 –8 –10 0 ...
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... T = 25°C A 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 FREQUENCY (kHz) 1567 G10 Supply Current vs Supply Voltage 1567 G12 LT1567 Output Overshoot vs Series Resistor and Capacitive Load 30 = ±2. – 50Ω ...
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... OAIN (Pin 2): Inverting or “–” Input of the Uncommitted Op Amp (OA) in the LT1567. The noninverting or “+” input of this amplifier is shared with that of the INV amplifier and accessed via the DC BIAS and BYPASS pins. The OA amplifier is optimized for minimal wideband noise ...
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... 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 ...
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... 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 filter configu- ration (Figure 1) for megahertz signal frequencies, with exceptionally low total noise ...
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... Chebyshev or Butterworth lowpass or second order bandpass filters. The spreadsheet outputs the required external standard component values and provides a circuit diagram. Signal Ground Both operational amplifiers within the LT1567 are de- signed for inverting operation (constant common mode LT1567 ...
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... Checking for these limits with a wire in place of the filter is a prudent routine procedure. Low Noise Differential Circuits The LT1567 is an optimum analog building for designing node in single supply differential circuits to process low level IN may differ from the signals ...
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... GAIN = 2 DIFF 200Ω 100 90 V GAIN = 10 DIFF R1 = 200Ω 2.55MHz –3dB f = 4MHz NBW 70 0.5 1 1 DIFF RMS 1567 F03b LT1567 R V OUT1 V C DIFF OUT2 1567 F03a + 2 V REF 1 = 4π • R • 1567fa 11 ...
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... W U Output Drive voltage REF The output of the LT1567 op amp (Pin 1) can typically provide at least ±20mA. The minimum resistive load to can be used to REF ground that Pin 1 or Pin 7 can drive depends on the feedback resistor and the peak output voltage. For ex- ample, the differential driver circuit in Figure 4 is operating is 1 ...
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... –3dB IN2 IN1 OUT 2π • R2 • Vη, INPUT REFERRED R2 GAIN NOISE (nV/√Hz) 604Ω 1 9.0 1.21k 2 8.4 2.43k 4 8.1 = GAIN • Vη • √ 1.57 • f ηBW ηBW OUT –3dB Figure 5. A Differential to Single Ended Amplifier/Filter LT1567 V OUT 7 – V 1567 F05 ) 1567fa 13 ...
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... R1 R2 noise of resistors ( and R2 respectively. Resistor typically smaller than R1 and is omitted from noise S Example: Calculate V , the voltage noise density LT1567 op amp inverter for 604Ω. With V = 1.4nV/√Hz and I = 1pA/√Hz 604 – • ...
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... DETAIL “A” (.193 ± .006) 0° – 6° TYP 0.53 ± 0.152 1.10 (.021 ± .006) (.043) DETAIL “A” MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP LT1567 0.52 (.0205 REF 3.00 ± 0.102 (.118 ± .004) (NOTE 0.86 (.034) REF 0.127 ± ...
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... Very Low Noise 4th Order Filter Building Block LTC1569-6/LTC1569-7 Self Clocked, 10th Order Linear Phase Lowpass Filters Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● A 3rd Order Chebyshev 2.5MHz Lowpass Filter 1 6 LT1567 220pF 600Ω 600Ω 2 – – + 0.1µ 7pF 150Ω ...