AK9721AE

NRND

LED Driver Built-in IR Sensor Analog Front End

LED Driver Built-in IR Sensor Analog Front End

NRND

Description

The AK9721AE is an analog front-end IC for IR sensors with a built-in LED driver for infrared emission.
The driver for the light emitting element (IR-LED) of the AK9721AE is a programmable constant current circuit, enabling optimal control according to the optical path length of the gas sensor. The signal from the light receiving element (IR sensor) is amplified by a programmable gain amplifier, AD-converted at 13-bit resolution, and output via the I²C bus. Each setting can be made from an external MCU.
By connecting our products AK9700AE and AK9710AE, NDIR type CO₂ sensor system can be easily configured.

Key Features

  • Equipped with programmable constant current circuit

Applications

  •                                 Measurement of gas concentration in a room or in a closed chamber
                                

Specifications

Part Number
AK9721AE
LED Drive Current [mA]
28 - 121 Programmable (3mA Step)
ADC Resolution [bit]
13
Power Supply Voltage (MIN.) [V]
2.7
Power Supply Voltage (TYP.) [V]

                                
Power Supply Voltage (MAX.) [V]
3.6
Package Size [mm]
3.0 x 3.0 x 0.7
Other

                                
Operating Temperature [℃]
-40 to 90
Device Package
HWQFN
Number of Pins
16

Product Information

Part Status
NRND
Pb Free
Yes
Halogen Free
Yes
MSL
MSL1
Packaging
TAPE
JEDEC Standard Packaging
Compliant
Minimum Order Quantity [pcs.]
1000
Replacement P/N

                                

Block Diagram

Block Diagram