LT1671 Linear Technology, LT1671 Datasheet
LT1671
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LT1671 Summary of contents
Page 1
... Like the LT1394, LT1016 and LT1116, this comparator has complementary outputs designed to interface directly to TTL or CMOS logic. The LT1671 may operate from either a single 5V supply or dual 5V supplies. Low offset voltage specifications and high gain allow the LT1671 to be used in precision applications. ...
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... 3.3V 4.6V V 5.4V – – – OUT ORDER PART TOP VIEW NUMBER 8 Q OUT LT1671CS8 + 7 Q OUT LT1671IS8 – 6 GND LATCH 5 ENABLE S8 PART MARKING S8 PACKAGE 1671 = 150 C, = 190 C/ W 1671I MIN TYP MAX 0.8 2.5 4 100 ...
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... Note 3: The LT1671CS8 and LT1671CMS8 are guaranteed to meet specified performance from and are designed, characterized and expected to meet these extended temperature limits, but are not tested at – and 85 C. The LT1671IS8 is guaranteed to meet the extended temperature limits. Note 4: Input offset voltage (V ...
Page 4
... LT1671 W U TYPICAL PERFORMANCE CHARACTERISTICS Gain Characteristics 5 125 4 4 – 3.5 A 3.0 2.5 2.0 1.5 1.0 0.5 0 –3 –2 – DIFFERENTIAL INPUT VOLTAGE (mV) 1671 G01 Propagation Delay vs Input Overdrive 140 100mV STEP 120 100 ...
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... OUT 125 – –4 –8 –7 –6 –5 NEGATIVE SUPPLY VOLTAGE (V) 1671 G14 Response to 15MHz 10mV Sine Wave 50ns/DIV 1671 G17 LT1671 ) 1671 G12 –3 –2 –1 0 1671 G15 5 ...
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... LT1671 W U TYPICAL PERFORMANCE CHARACTERISTICS + t Response Time to PD 5mV Overdrive 5mV +IN – 95mV 20ns/DIV 5mV PIN FUNCTIONS + V (Pin 1): Positive Supply Voltage. Normally 5V. +IN (Pin 2): Noninverting Input. –IN (Pin 3): Inverting Input. – V (Pin 4): Negative Supply Voltage. Normally either 0V or – ...
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... U APPLICATIONS INFORMATION Common Mode Considerations The LT1671 is specified for a common mode range of – 3. supply or a common mode range 3. single 5V supply. A more general consider- ation is that the common mode range is 0V below the negative supply and 1.5V below the positive supply, inde- pendent of the actual supply voltage ...
Page 8
... When designing level shifters, keep in mind that the TTL output of the LT1671 is a sink-source pair (Figure 3) with good ability to drive capacitance (such as feedforward capaci- tors). Figure 4 shows a noninverting voltage gain stage with a 15V output ...
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... Figure 5. Level Shift with Inverting Voltage Gain—Bipolar Swing W U LT1671 is the key to low delay, providing Q2’s base with nearly ideal drive. This capacitor loads the LT1671’s output transition, but Q2’s switching is clean with 3ns delay on the rise and fall of the pulse. Figure 6 is similar to Figure 4 except that a sink transistor has replaced the Schottky diode ...
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... INFORMATION Crystal Oscillators Figure 7 shows a crystal oscillator circuit. In the circuit, the resistors at the LT1671’s positive input set a DC bias point. The 2k-0.068 F path sets up phase shifted feedback and the circuit looks like a wideband unity-gain follower at DC. The crystal’s path provides resonant positive feedback and stable oscillation occurs ...
Page 11
... MSOP (MS8) 1197 (0.65) TYP 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) TYP SO8 0996 LT1671 11 ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com LT1671’s positive input. The LT1671’s negative input is biased directly from A1’s output. The LT1671’s output, the circuit’s output, is unaffected by > 85:1 signal amplitude variations. Bandwidth limiting in A1 does not affect trig- gering because the adaptive trigger threshold varies ratiometrically to maintain circuit output ...