LT1886 Linear Technology Corporation, LT1886 Datasheet
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LT1886
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LT1886 Summary of contents
Page 1
... The ampli fiers are gain-of-ten stable, but can be easily compensated P-P V < 10 for lower gains. The LT1886 features balanced, high impedance inputs with 4 A maximum input bias current and 4mV maximum input offset voltage. Single supply applications are easy to implement and have lower total noise than current feedback amplifier implementations ...
Page 2
... OUT 100 , 10mV Overdrive 10mV Overdrive 200mA, 10mV Overdrive OUT (Note ORDER PART NUMBER + 8 V LT1886CS8 7 OUT B 6 – + PART MARKING 1886 = 80 C/W (Note 4) JA MIN TYP MAX 150 400 600 1 ...
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... CM Differential 1V 100 OUT 1V OUT 100 , 10mV Overdrive 10mV Overdrive 200mA, 10mV Overdrive OUT LT1886 MIN TYP MAX UNITS 133 200 V/ s 110 MHz 700 MHz 2 – 75/– 63 dBc – 85/– 71 dBc – ...
Page 4
... Note 7: Full power bandwidth is calculated from the slew rate: FPBW = SR Note 8: This parameter is not 100% tested. Note 9: The LT1886C is guaranteed to meet specified performance from The LT1886C is designed, characterized and expected to meet specified performance from – but is not tested or QA sampled 2 test board at these temperatures ...
Page 5
... SETTLING TIME (ns) 1886 G08 Output Impedance vs Frequency 100 = 100 V = 100 0 0. 100k 1M 10M FREQUENCY (Hz) 1886 G11 LT1886 75 100 125 1886 G06 1mV 1mV 1886 G09 100M 1886 G12 5 ...
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... LT1886 W U TYPICAL PERFOR A CE CHARACTERISTICS Frequency Response vs Supply Voltage 100 2. 10M 100M 1G FREQUENCY (Hz) 1886 G13 Frequency Response vs Supply Voltage – 2. –1 – ...
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... –70 2nd –80 3rd 2nd – 100 L 3rd –100 OUTPUT VOLTAGE (V ) P-P 1886 G29 LT1886 Harmonic Distortion vs Resistive Load – – OUT P-P – 1MHz –40 –50 –60 2nd –70 –80 3rd – ...
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... LT1886 W U TYPICAL PERFOR A CE CHARACTERISTICS Harmonic Distortion vs Output Current 2.5V S – – 1MHz – – –70 – 100 150 PEAK OUTPUT CURRENT (mA) Small-Signal Transient 1886 G33 Large-Signal Transient 1886 G36 8 200 ...
Page 9
... If an input drive exceeds the supply, limit the current with an external resistor to less than 10mA. The LT1886 design is a true operational amplifier with high impedance inputs and low input bias currents. The input offset current is a factor of ten lower than the input bias current ...
Page 10
... Compensation 1886 F01 The LT1886 is stable in a gain 10 or higher for any supply and resistive load easily compensated for lower gains with a single resistor or a resistor plus a capacitor. Figure 2 shows that for inverting gains, a resistor from the inverting node to AC ground guarantees stability if the /(50 ...
Page 11
... Figure 5. Combination Compensation Output Loading The LT1886 output stage is very wide bandwidth and able to source and sink large currents. Reactive loading, even isolated with a back-termination resistor, can cause ring- ing at frequencies of hundreds of MHz. For this reason, any design should be evaluated over a wide range of output conditions ...
Page 12
... Note that the overall gain is increased to )/[2(1 – ADSL Driver Requirements The LT1886 is an ideal choice for ADSL upstream (CPE) modems. The key advantages are: 200mA output drive – R ...
Page 13
... RMS RMS a complete schematic.) The board is set up for either single 4.65V Peak or dual supply designs with Jumpers 1–4. The LT1886 is 80mA Peak set up for differential, noninverting gain of 3. Each amp is 350mW configured as in Figure 5 for maximum flexibility. The Single 12V ...
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... LT1813 +RCV 7 R15 LT1813 2k 6 – 4 – V C13 0.1 F R16 R14 1k 4.02k C7 10pF Figure 11. LT1886, LT1813 DSL Demo Board (DC304) C9 470pF TP1 TP2 R9 C21 12.4 470pF TP5 C23 JP5 R7 470pF 12.4 TP3 TP4 R10 12.4 C22 470pF COILCRAFT X8390-A ...
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... TYP OUT 1886 SS 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) BSC SO8 1298 LT1886 15 ...
Page 16
... While the LT1886 has clamps to the supply rails at the output pins, they may not be large enough to handle the significant transient energy. External clamping diodes, ...