Datasheet AD8305 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 100 dB-range (10nA-1mA) Logarithmic Converter |
| Pages / Page | 24 / 7 — Data Sheet. AD8305. 1.8. 0.5. 1.6. 0.4. 10nA. 100nA. 1µA. 0.3. 1.4. 0.2. … |
| Revision | C |
| File Format / Size | PDF / 567 Kb |
| Document Language | English |
Data Sheet. AD8305. 1.8. 0.5. 1.6. 0.4. 10nA. 100nA. 1µA. 0.3. 1.4. 0.2. 10µA. 1.2. 0.1. 1.0. (V). 10mV. 1mA. B (. V 0.8. 100µA. R; –0.1. 0.6. ER –0.2. –0.3. –0.4. –0.5. 10n
Model Line for this Datasheet
Text Version of Document
Data Sheet AD8305 1.8 0.5 1.6 0.4 10nA 100nA 1µA 0.3 1.4 B) 0.2 10µA 1.2 /d 0.1 1.0 (V) 10mV G 1mA B ( 0 LO d V 0.8 100µA R; –0.1 10µA O 0.6 R 1µA ER –0.2 100nA 100µA 1mA 0.4 10nA –0.3 0.2 –0.4 0 –0.5 1n 10n 100n 1µ 10µ 100µ 1m 10m
009
1n 10n 100n 1µ 10µ 100µ 1m 10m
012
IREF (A) IREF (A)
03053- 03053- Figure 9. VLOG vs. IREF for Multiple Values of IPD (Decade Steps from Figure 12. Law Conformance Error vs. IREF for Multiple Values of IPD (Decade 10 nA to 1 mA) Steps from 10 nA to 1 mA)
0.5 1.4 +3V, 0V 0.4 +5V, 0V +12V, 0V 1.2 0.3 100µA TO 1mA:T-RISE = <1µs, +9V, 0V T-FALL = < 1µs 1.0 B) 0.2 10µA TO 10µA:T-RISE = <1µs, /d T-FALL = < 1µs 0.1 0.8 10mV (V) 1µATO 10µA:T-RISE = 1µs, B ( 0 UT T-FALL = 5µs d OV 0.6 R; –0.1 O 100nA TO 1µA:T-RISE = 5µs, R +3V, –0.5V T-FALL = 20µs ER –0.2 0.4 +5V, –5V 10nA TO 100nA: T-RISE = 20µs, –0.3 T-FALL = 30µs 0.2 –0.4 –0.5 0 1n 10n 100n 1µ 10µ 100µ 1m 10m
010
–20 0 20 40 60 80 100 120 140 160 180
013
IPD (A) TIME (µs)
03053- 03053- Figure 10. Law Conformance Error vs. IPD for Various Supply Conditions (See Figure 13. Pulse Response − IPD to VOUT (G = 1) Annotations)
0.4 1.6 0.3 1.4 10nA TO 100nA: T-RISE = 30µs, T-FALL = 20µs 0.2 1.2 100nA TO 1µA:T-RISE = 30µs, V) T-FALL = 5µs 0.1 1.0 (m T 1µATO 10µA:T-RISE = 5µs, T-FALL = 1µs INP (V) 0 0.8 UT 10µA TO 100µA:T-RISE = 1µs, – V OV T-FALL = < 1µs UM –0.1 S 0.6 V 100µA TO 1mA:T-RISE = <1µs, T-FALL = < 1µs –0.2 0.4 –0.3 0.2 –0.4 0
014
1n 10n 100n 1µ 10µ 100µ 1m 10m
011
–20 0 20 40 60 80 100 120 140 160 180 I TIME (µs) PD (A)
03053- 03053- Figure 11. VINPT − VSUM vs. IPD Figure 14. Pulse Response − IREF to VOUT (G = 1) Rev. C | Page 7 of 24 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics General Structure Theory Managing Intercept and Slope Response Time and Noise Considerations Power Supply Sequencing Applications Information Calibration Using a Negative Supply Log-Ratio Applications Reversing The Input Polarity Characterization Methods Evaluation Board Outline Dimensions Ordering Guide
009
1n 10n 100n 1µ 10µ 100µ 1m 10m
012
IREF (A) IREF (A)
03053- 03053- Figure 9. VLOG vs. IREF for Multiple Values of IPD (Decade Steps from Figure 12. Law Conformance Error vs. IREF for Multiple Values of IPD (Decade 10 nA to 1 mA) Steps from 10 nA to 1 mA)
0.5 1.4 +3V, 0V 0.4 +5V, 0V +12V, 0V 1.2 0.3 100µA TO 1mA:T-RISE = <1µs, +9V, 0V T-FALL = < 1µs 1.0 B) 0.2 10µA TO 10µA:T-RISE = <1µs, /d T-FALL = < 1µs 0.1 0.8 10mV (V) 1µATO 10µA:T-RISE = 1µs, B ( 0 UT T-FALL = 5µs d OV 0.6 R; –0.1 O 100nA TO 1µA:T-RISE = 5µs, R +3V, –0.5V T-FALL = 20µs ER –0.2 0.4 +5V, –5V 10nA TO 100nA: T-RISE = 20µs, –0.3 T-FALL = 30µs 0.2 –0.4 –0.5 0 1n 10n 100n 1µ 10µ 100µ 1m 10m
010
–20 0 20 40 60 80 100 120 140 160 180
013
IPD (A) TIME (µs)
03053- 03053- Figure 10. Law Conformance Error vs. IPD for Various Supply Conditions (See Figure 13. Pulse Response − IPD to VOUT (G = 1) Annotations)
0.4 1.6 0.3 1.4 10nA TO 100nA: T-RISE = 30µs, T-FALL = 20µs 0.2 1.2 100nA TO 1µA:T-RISE = 30µs, V) T-FALL = 5µs 0.1 1.0 (m T 1µATO 10µA:T-RISE = 5µs, T-FALL = 1µs INP (V) 0 0.8 UT 10µA TO 100µA:T-RISE = 1µs, – V OV T-FALL = < 1µs UM –0.1 S 0.6 V 100µA TO 1mA:T-RISE = <1µs, T-FALL = < 1µs –0.2 0.4 –0.3 0.2 –0.4 0
014
1n 10n 100n 1µ 10µ 100µ 1m 10m
011
–20 0 20 40 60 80 100 120 140 160 180 I TIME (µs) PD (A)
03053- 03053- Figure 11. VINPT − VSUM vs. IPD Figure 14. Pulse Response − IREF to VOUT (G = 1) Rev. C | Page 7 of 24 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics General Structure Theory Managing Intercept and Slope Response Time and Noise Considerations Power Supply Sequencing Applications Information Calibration Using a Negative Supply Log-Ratio Applications Reversing The Input Polarity Characterization Methods Evaluation Board Outline Dimensions Ordering Guide
