ADL5310 Analog Devices, Inc., ADL5310 Datasheet
ADL5310
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ADL5310 Summary of contents
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... The use of individually optimized reference currents may be valuable when using the ADL5310 for gain or absorbance measurements where each channel input has a different current- range requirement. The reference current inputs are also fully functional dynamic inputs, allowing log ratio operation with the reference input current as the denominator ...
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... ADL5310 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 General Structure............................................................................ 11 Theory.......................................................................................... 11 Managing Intercept and Slope .................................................. 12 Response Time and Noise Considerations.............................. 12 REVISION HISTORY 9/04—Data Sheet Changed from Rev Rev. A Changes to Ordering Guide .......................................................... 20 11/03—Revision 0: Initial Version Applications ...
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... Gain = 1 0 4.8 V output swing Pins 8 and 9: VPOS; Pins 10, 11, and 20: VNEG (V – ≤ Input currents < 10 µA (V – ≤ REF Rev Page ADL5310 Min Typ Max Unit 0.46 0.5 0.54 V 0.030 mV/° ...
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... ADL5310 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage V − Input Current Internal Power Dissipation θ JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature Range (Soldering 60 sec) 1 With paddle soldered down. ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection ...
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... Figure 2. 24-Lead LFCSP Pin Configuration – ≤ Both pins must be connected externally These pins are usually grounded. For more details, see the General Structure and N Rev Page ADL5310 SCL1 BIN1 LOG1 LOG2 BIN2 SCL2 . Usually connected to photodiode anode PD1 ...
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... ADL5310 TYPICAL PERFORMANCE CHARACTERISTICS 665 kΩ 25°C, unless otherwise noted. REF 1 –40°C, 0°C, +25°C, +70°C, +85° 1.4 1.2 1.0 0.8 0.6 0.4 0 10n 100n 1µ 10µ I (A) INP Figure 3. V vs. I for Multiple Temperatures LOG INP 1 –40°C, 0°C, +25°C, +70°C, +85°C ...
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... MEAN – 3σ 1n 10n 100n 1µ 10µ 100µ –40°C, 85°C A MEAN + 3σ AT –40°C MEAN + 3σ AT +85°C MEAN – 3σ AT –40°C 1n 10n 100n 1µ 10µ 100µ I (A) PD ADL5310 3µA 3mA 1m 10m , INP = 25° 10m 1m 10m ...
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... ADL5310 15 30nA 10 300nA 5 3nA 0 –5 –10 –15 –20 –25 –30 –35 –40 –45 –50 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 15. Small Signal AC Response, I (5% Sine Modulation, Decade Steps from mA) 15 30nA 10 300nA 5 0 –5 3nA –10 –15 –20 3µA –25 – ...
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... Figure 25. Slope Mismatch Drift vs. Temperature – 3σ to Either Side of Mean) Normalized to 25° MEAN + 3σ MEAN – 3σ TEMPERATURE (°C) Figure 26. Intercept Mismatch Drift vs. Temperature (I – 3σ to Either Side of Mean) Normalized to 25° ADL5310 ...
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... ADL5310 700 600 500 400 300 200 100 0 190 195 200 SLOPE (mV/dec) Figure 27. Distribution of Logarithmic Slope 600 500 400 300 200 100 0 100 200 300 INTERCEPT (pA) Figure 28. Distribution of Logarithmic Intercept 700 600 500 400 300 200 100 0 2.46 2.48 2.50 VREF VOLTAGE (V) Figure 29. Distribution of V ...
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... Pin VREF. Both VREF pins are internally shorted, as are both VSUM pins. The resistance at the VSUM pin is nominally 16 kΩ; this voltage is not intended as a general bias source. The ADL5310 also supports the use of an optional negative supply voltage Pin VNEG. When V N negative, VSUM may be connected to ground ...
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... Further details on these applications can be found in the AD8304 data sheet. RESPONSE TIME AND NOISE CONSIDERATIONS The response time and output noise of the ADL5310 are funda- mentally a function of the signal current, I the bandwidth is proportional to I output low frequency voltage-noise spectral-density is a ...
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... I PD2 1kΩ 1nF 1nF The ADL5310 is easy to use in optical supervisory systems and in similar situations where a wide-ranging current converted to its logarithmic equivalent—that is, represented in decibel terms. Basic connections for measuring a single current at each input are shown in Figure 34, which also includes various nonessential components, as explained next. ...
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... AD8305 data sheet. CALIBRATION Each channel of the ADL5310 has a nominal slope and intercept at LOG1 (LOG2) of 200 mV/decade and 300 pA, respectively, when configured as shown in Figure 34. These values are untrimmed and the slope alone may vary by as much as 7.5% over temperature ...
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... Figure 37. The current mirror is used to feed an opposite polarity replica of the cathode photocurrent of PD2 into Channel 2 of the ADL5310. This allows one channel to be used as an absolute power meter for the optical signal incident on PD2, while the opposite channel is used to directly compute the log ratio of the two input signals. 0.1µ ...
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... Figure 39. Log Conformance for Wilson Mirror ADL5310 Combination, Normalized Channel 1 Input Current, I CHARACTERIZATION METHODS During the characterization of the ADL5310, the device was treated as a precision current-input logarithmic converter, because it is impractical to generate accurate photocurrents by illuminating a photodiode. The test currents were generated by ...
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... EVALUATION BOARD An evaluation board is available for the ADL5310 (Figure 40 shows the schematic). It can be configured for a wide variety of experiments. The gain of each buffer amp is factory-set to unity, providing a slope of 200 mV/dec, and the intercept is set to 300 pA. Table 4 describes the various configuration options. Table 4. Evaluation Board Configuration Options ...
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... VRDZ VNEG C3 0.01µF R3 OPEN R4 R2 0Ω 0Ω VBIAS C2 100pF R28 R29 665kΩ 665kΩ 1 VSUM 2 INP1 3 IRF1 ADL5310 4 IRF2 5 INP2 6 VSUM VREF OPEN C5 100pF C9 100pF R11 R10 0Ω 0Ω C6 0.01µF C8 0.01µF VBIAS AGND VPOS 1 ...
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... Figure 41. Component-Side Layout Figure 42. Component-Side Silkscreen Rev Page ADL5310 ...
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... Model Temperature Range ADL5310ACP-R2 –40°C to +85°C ADL5310ACP-REEL7 –40°C to +85°C ADL5310-EVAL 1 Branding is as follows: Line 1 — JQA Line 2 — Lot Code Line 3 — (Date Code) Date Code is in YYWW format © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...