Datasheet LT1466L, LT1467L (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Micropower Dual/Quad Precision Rail-to-Rail Input and Output Op Amps |
| Pages / Page | 12 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Small-Signal Response. Large-Signal … |
| File Format / Size | PDF / 249 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Small-Signal Response. Large-Signal Response. Channel Separation vs Frequency. S =. 2.5V
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LT1466L/LT1467L
W U TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Response Large-Signal Response Channel Separation vs Frequency V V S =
±
2.5V S =
±
5V
130 V 120 S = ± 15V 110 100 90 80 70 60 CHANNEL SEPARATION (dB) 50 1466L/67L G22 V V 1466L/67L G23 S = ±2.5V S = ± 5V 40 AV = 1 AV = 1 30 100 1k 10k 100k FREQUENCY (Hz) 1466L/67L G24
U U W U APPLICATIONS INFORMATION Rail-to-Rail Operation
Technology’s proprietary complementary bipolar process, The LT1466L/LT1467L differ from conventional op amps which ensures very similar DC and AC characteristics for in the design of both the input and output stages. Figure 1 the output devices Q12 and Q13. shows a simplified schematic. The input stage consists of First, looking at the input stage, Q5 switches the current two differential amplifiers, a PNP stage Q1-Q2 and an NPN from current source I1 between the two input stages. stage Q3-Q4, that are active over different portions of the When the input common mode voltage VCM is near the input common mode range. Each input stage is trimmed negative supply, Q5 is reverse biased, so the current from for offset voltage. A complementary output configuration I1 becomes the tail current for the PNP differential pair (Q12-Q13) is employed to create an output stage with rail- Q1-Q2. At the other extreme, when VCM is near the positive to-rail swing. The devices are fabricated on Linear supply, the PNPs Q1-Q2 are biased off. The current from V + I1 Q12 C1 Q11 Q5 VBIAS Q10 V – CC + IN V + OUT BUFFER AND – IN Q3 Q4 Q1 Q2 Q7 OUTPUT BIAS Q8 C2 Q9 Q13 Q6 D1 V – 1466L/67L F01
Figure 1. Simplified Schematic
8
W U TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Response Large-Signal Response Channel Separation vs Frequency V V S =
±
2.5V S =
±
5V
130 V 120 S = ± 15V 110 100 90 80 70 60 CHANNEL SEPARATION (dB) 50 1466L/67L G22 V V 1466L/67L G23 S = ±2.5V S = ± 5V 40 AV = 1 AV = 1 30 100 1k 10k 100k FREQUENCY (Hz) 1466L/67L G24
U U W U APPLICATIONS INFORMATION Rail-to-Rail Operation
Technology’s proprietary complementary bipolar process, The LT1466L/LT1467L differ from conventional op amps which ensures very similar DC and AC characteristics for in the design of both the input and output stages. Figure 1 the output devices Q12 and Q13. shows a simplified schematic. The input stage consists of First, looking at the input stage, Q5 switches the current two differential amplifiers, a PNP stage Q1-Q2 and an NPN from current source I1 between the two input stages. stage Q3-Q4, that are active over different portions of the When the input common mode voltage VCM is near the input common mode range. Each input stage is trimmed negative supply, Q5 is reverse biased, so the current from for offset voltage. A complementary output configuration I1 becomes the tail current for the PNP differential pair (Q12-Q13) is employed to create an output stage with rail- Q1-Q2. At the other extreme, when VCM is near the positive to-rail swing. The devices are fabricated on Linear supply, the PNPs Q1-Q2 are biased off. The current from V + I1 Q12 C1 Q11 Q5 VBIAS Q10 V – CC + IN V + OUT BUFFER AND – IN Q3 Q4 Q1 Q2 Q7 OUTPUT BIAS Q8 C2 Q9 Q13 Q6 D1 V – 1466L/67L F01
Figure 1. Simplified Schematic
8
