TLV3492AIDCNT

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1. Describe

TLV3492AIDCNT Family of Push-Pull Output Comparators Has a fast 6µs response time and < 1.2µA (Maximum) nanopower capability, allowing operation From 1.8 V to 5.5 V. Input common mode range Exceeding power rails makes the TLV3492AIDCNT ideal choice for low voltage applications. Tiny package provides portable options and space-constrained applications. individual (TLV3491) Available in 5-pin SOT-23 and 8-pin SOIC package. Dual (TLV3492) uses 8 pins SOT-23 and SOIC packages. Quad (TLV3494) Yes Available in 14-pin TSSOP and SOIC packages. The TLV349x are ideal for power-sensitive low-voltage (two-cell) applications.

2. Feature

    1. Very low supply current: 0.8 µA (typ)

    2. Input common mode range: 200mV beyond rails

    3. Supply voltage: 1.8 V to 5.5 V

    4. High speed: 6 µs

    5. Push-pull CMOS output stage

    6. Small Package:

        – 5-pin SOT-23 (single)

        – 8-pin SOT-23 (dual)

3. Application 

    1. Portable medical equipment

    2. Wireless security system

    3. Remote control system

    4. Handheld instruments

    5. Ultra low power system

4. Pin configuration

5. Pin Description

6. Function description

    1. Operating Voltage

        The TLV3492AIDCNT comparator is specified for a single 1.8 V to 5.5 V supply (or ±0.9 V to ±2.75 V dual supply) over the -40°C to 125°C temperature range.

    2. Input overvoltage protection

        The device inputs are protected by electrostatic discharge (ESD) diodes that conduct if the input voltage exceeds the supply by approximately 500 mV. If the input current is limited to 10 mA, transient voltages in excess of 500 mV from the supply can be tolerated. This restriction is easy to implement Small input resistance in series with the input of the comparator.

    3. External hysteresis

        The comparator inputs are not immune to noise within the specified offset voltage (±15 mV). For noisy input signals, the comparator output will often show multiple switches as the input signal crosses the switching threshold. The typical comparator threshold for the TLV3492AIDCNT is ±15 mV. To prevent multiple switching within the comparator threshold of the TLV3492AIDCNT, external hysteresis must be added by connecting a small amount of feedback to the positive input.

7. Application Information

The TLV3492AIDCNT family of comparators has rail-to-rail inputs and outputs at supply voltages as low as 1.8V. Push-pull output stages are the best choice for lower power budget applications and have no breakdown current. Low supply voltages, common-mode input range beyond the rails, and typical supply current of 0.8 µA make the TLV349x family ideal for battery-powered applications operating from a single cell battery.