ZHCSGV4J September 2017 – November 2024 TLV7031 , TLV7032 , TLV7034 , TLV7041 , TLV7042 , TLV7044
PRODUCTION DATA
The IR receiver AFE design is highly streamlined and optimized. R1 converts the IR light energy induced current into voltage and applies to the inverting input of the comparator. The RC network of R2 and C1 establishes a reference voltage Vref, which tracks the mean amplitude of the IR signal. The noninverting input is directly connected to Vref through R3. R3 and R4 are used to produce a hysteresis to keep transitions free of spurious toggles. To reduce the current drain from the coin cell battery, data transmission must be short and infrequent.
More technical details are provided in the TI TechNote Low Power Comparator for Signal Processing and Wake-Up Circuit in Smart Meters (SNVA808).