TLV9064IRTER

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1. Describe

The TLV9061 (single), TLV9062 (dual) and TLV9064IRTER (quad) are single, dual and quad low voltage (1.8 V to 5.5 V) operational amplifiers with rail-to-rail inputs and outputs - swing capability. These devices are an extremely cost-effective solution for applications requiring low voltage operation, small size, and high capacitive load drive. Although the capacitive load drive of the TLV906x is 100 pF, the resistive open-loop output impedance makes stabilization easier at higher capacitive loads. These op amps are designed for low voltage operation (1.8 V to 5.5 V) and have performance specifications similar to the OPAx316 and TLVx316 devices. The TLV906xS devices include a shutdown mode that allows the amplifier to switch to standby mode with a typical current consumption of less than 1µA. The TLV906xS family helps simplify system design because it is unity-gain stable, integrates RFI and EMI suppression filters, and does not provide phase inversion under overdrive conditions. Tiny packages such as X2SON and X2QFN are available in all channel variants (single, dual and quad), as well as industry standard packages such as SOIC, MSOP, SOT-23 and TSSOP.

2. Feature

    1. Rail-to-rail input and output

    2. Low input offset voltage: ±0.3 mV

    3. Unity Gain Bandwidth: 10 MHz

    4. Low broadband noise: 10 nV/√Hz

    5. Low input bias current: 0.5 pA

    6. Low quiescent current: 538 µA

    7. Unity gain stable

    8. Internal RFI and EMI filters

    9. Operates from supply voltages as low as 1.8 V

  10. Easier to stabilize due to higher capacitive loads To Resistive Open Loop Output Impedance

  11. Shutdown version: TLV906xS

  12. Extended temperature range: –40°C to 125°C

3. Pin configuration

4. Application

    1. electric bicycle

    2. Smoke Detectors

    3. HVAC: heating, ventilation and air conditioning

    4. Motor Control: AC Induction

    5. refrigerator

    6. Wearable device

    7. laptop

    8. washing machine

    9. Sensor signal conditioning

  10. Power module

  11. Barcode scanner

  12. Active filter

  13. Low-Side Current Sensing

5. Function Description

    1. Rail-to-rail input and output

        The input common-mode voltage range of the TLV9064IRTER family is 100mV beyond the supply rails, covering the entire supply voltage range of 1.8V to 5.5V. This performance is achieved through complementary input stages: paralleling N-channel input differential pairs using P-channel differential pairs, as shown in the functional block diagram. The N-channel pair is valid for input voltages close to the positive supply rail, typically (V+) – 1.4 V to 200 mV above the positive supply, while the P-channel pair is 200 mV below the negative supply to approximately (V+) – 1.4 V. There is a small transition region, typically (V+) – 1.2 V to (V+) – 1 V, where both pairs are on. This 200 mV transition region can vary by up to 200 mV with process variation. Therefore, the transition region (both stages on) can range from (V+) – 1.4 V to (V+) – 1.2 V (low side), and up to (V+) – 1 V to (V+) – 0.8 V high side. Within this transition region, PSRR, CMRR, offset voltage, offset drift, and THD are reduced compared to device operation outside this region.

The TLV9064IRTER family is designed as a low-power, low-voltage operational amplifier that provides powerful output drive capability. A class AB output stage with common source transistors enables full rail-to-rail output swing capability. For a 10 kΩ resistive load, the output swings to within 15 mV of either rail, regardless of the applied supply voltage. Different load conditions change the ability of the amplifier to swing close to the rail.

    2. EMI suppression

        The TLV9064IRTER uses integrated electromagnetic interference (EMI) filtering to reduce EMI effects from sources such as wireless communications and dense circuit boards with mixed analog signal chains and digital components. EMI immunity can be improved through circuit design techniques; the TLV906x benefits from these design improvements. Texas Instruments (TI) has developed the ability to accurately measure and quantify op amp immunity over a wide spectral range from 10 MHz to 6 GHz.

    3. Overload recovery

        Overload recovery is defined as the time required for the op amp output to recover from saturation to linearity. Due to high input voltage or high gain, the output device of an op amp goes into saturation when the output voltage exceeds the rated operating voltage. After the device enters the saturation region, it takes some time for the charge carriers in the output device to return to a linear state. After the charge carriers return to a linear state, the device starts switching at the specified slew rate. Therefore, the propagation delay (in the case of overload) is the sum of the overload recovery time and the transition time. The overload recovery time of the TLV906x family is about 200 ns.

    4. Shutdown function

        The TLV9064IRTER device has a SHDN pin that disables the op amp, putting it into a low-power standby mode. In this mode, the current consumption of the op amp is typically less than 1 µA. The SHDN pin is active low, which means that when the input to the SHDN pin is an active logic low, shutdown mode is enabled. The SHDN pin is referenced to the negative supply voltage of the op amp. The threshold for the shutdown function is approximately 800 mV (typ), independent of the supply voltage. Hysteresis is included in the switching threshold to ensure smooth switching characteristics. To ensure optimal shutdown behavior, the SHDN pin should be driven by a valid logic signal. An active logic low is defined as a voltage between V– and V– + 0.2 V. An active logic high is defined as a voltage between V– + 1.2 V and V+. The shutdown pin must be connected to a valid high or low voltage or driven, not open circuited. There is no internal pull-up to enable the amplifier. The SHDN pin is a high impedance CMOS input. The dual-op-amp version is controlled independently, and the quad-op-amp version is controlled in pairs with the logic input. For battery powered applications, this feature can be used to greatly reduce average current and extend battery life. The enable time for full shutdown of all channels is 10 µs; the disable time is 6 µs. When disabled, the output assumes a high impedance state. This architecture allows the TLV9064IRTER to operate as a gated amplifier (or to multiplex the device output onto a general purpose analog output bus). The off-time (tOFF) depends on the load conditions and increases as the load resistance increases. To ensure shutdown (disable) within a specific shutdown time, a 10kΩ load needs to be specified for the intermediate supply (VS/2). If the TLV906xS is used with no load, the resulting shutdown time can be very long Increase.

    5. Device functional mode

        The TLV906x family operates from a supply voltage between 1.8 V (±0.9 V) and 5.5 V (±2.75 V). The TLV9064IRTER device has a shutdown mode and shuts down when an active logic low is applied to the shutdown pin.

6. Application Information

The TLV9064IRTER family features 10MHz bandwidth and 6.5V/µs slew rate with only 538µA of current per supply channel, providing good AC performance with very low power consumption. DC applications are well served by Very Low Input Noise Voltage, Low Input Bias Current, and Typical Input Offset Voltage of 10 nV/√Hz at 10 kHz 0.3 mV.