Datasheet (Asahi Kasei Microdevices) - 7
| Manufacturer | Asahi Kasei Microdevices |
| Description | LED Driver and Sensor AFE for NDIR Gas Sensing |
| Pages / Page | 34 / 7 — 10. Electrical Characteristics. 10.1. Analog Characteristics |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
10. Electrical Characteristics. 10.1. Analog Characteristics
Model Line for this Datasheet
Text Version of Document
[AK9723AJ]
10. Electrical Characteristics 10.1. Analog Characteristics
Table 10.1 Electrical Characteristics Unless otherwise specified, AVDD = FVDD= 2.7 ~ 3.6V, Ta = -40 ~ 85ºC Parameter Symbol Min. Typ. Max. Unit IR1 path IR sensor maximum input IR1_AFE_GAIN [1:0] bits = “01” SIR1 24 30 37 nA current 1 ITIME [7:0] bits = “00101010” IR sensor maximum input IR2 path SIR2 2.0 2.5 3.1 μA current 2 ITIME [7:0] bits = “00101010” IR1 path MLOOP [3:0] bits= “0000” IR1_AFE_GAIN [1:0] bits = “00” LSB IR sensor output noise 1 SON1 - 27000 40500 ITIME [7:0] bits = “00101010” rms R01 = 33kΩ Ta = 25 ºC IR2 path ITIME [7:0] bits = “00101010” LSB IR sensor output noise 2 SON2 - 2000 3000 R02 = 33kΩ rms Ta = 25 ºC Sensor resistance IR1 path SRMR1 675 750
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kΩ measurement range 1
Sensor resistance measurement mode Sensor resistance IR2 path SRMR2 405 450 - kΩ measurement range 2 Sensor resistance measurement mode LED forward voltage VFMR 0.55 - FVDD-0.5 V measurement range LED terminal voltage LEDADJ [4:0] bits= “11000” LTVR 0.55 - FVDD-0.5 V range LEDADJ [4:0] bits= “11000” LED current accuracy LEDO pin = 1.5V LCA 97 100 103 mA Ta = 25 ºC LEDO pin = 1.5V LED current step AVDD, FVDD pins = 2.7V LCS 1.5 3.0 4.5 mA Ta = 25 ºC PDN pin = AVDD IDD0 - 0.2 3.0 μA MODE [1:0] bits = “00” PDN pin = AVDD Current consumption MODE [1:0] bits = “10” MTIME [7:0] bits = “00000000” IDD1 - 260 360 μA ITIME [7:0] bits = “01011100” LEDADJ [4:0] bits = “11000” 018015111-E-01 2019/8 - 7 -
10. Electrical Characteristics 10.1. Analog Characteristics
Table 10.1 Electrical Characteristics Unless otherwise specified, AVDD = FVDD= 2.7 ~ 3.6V, Ta = -40 ~ 85ºC Parameter Symbol Min. Typ. Max. Unit IR1 path IR sensor maximum input IR1_AFE_GAIN [1:0] bits = “01” SIR1 24 30 37 nA current 1 ITIME [7:0] bits = “00101010” IR sensor maximum input IR2 path SIR2 2.0 2.5 3.1 μA current 2 ITIME [7:0] bits = “00101010” IR1 path MLOOP [3:0] bits= “0000” IR1_AFE_GAIN [1:0] bits = “00” LSB IR sensor output noise 1 SON1 - 27000 40500 ITIME [7:0] bits = “00101010” rms R01 = 33kΩ Ta = 25 ºC IR2 path ITIME [7:0] bits = “00101010” LSB IR sensor output noise 2 SON2 - 2000 3000 R02 = 33kΩ rms Ta = 25 ºC Sensor resistance IR1 path SRMR1 675 750
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kΩ measurement range 1
Sensor resistance measurement mode Sensor resistance IR2 path SRMR2 405 450 - kΩ measurement range 2 Sensor resistance measurement mode LED forward voltage VFMR 0.55 - FVDD-0.5 V measurement range LED terminal voltage LEDADJ [4:0] bits= “11000” LTVR 0.55 - FVDD-0.5 V range LEDADJ [4:0] bits= “11000” LED current accuracy LEDO pin = 1.5V LCA 97 100 103 mA Ta = 25 ºC LEDO pin = 1.5V LED current step AVDD, FVDD pins = 2.7V LCS 1.5 3.0 4.5 mA Ta = 25 ºC PDN pin = AVDD IDD0 - 0.2 3.0 μA MODE [1:0] bits = “00” PDN pin = AVDD Current consumption MODE [1:0] bits = “10” MTIME [7:0] bits = “00000000” IDD1 - 260 360 μA ITIME [7:0] bits = “01011100” LEDADJ [4:0] bits = “11000” 018015111-E-01 2019/8 - 7 -
