UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
The TLV7011 and TLV7021 devices are single-channel, micro-power comparators with push-pull and open-drain outputs. Operating from 1.6 V to 5.5 V and consuming only 5 µA, the TLV7011 and TLV7021 are ideally suited for portable and industrial applications. The TLV7011 and TLV7021 are available in an ultra-small X2SON package (0.8 × 0.8 mm) to offer significant board space saving in space-challenged designs. Small 5-pin SC70 and SOT-23 packages are also available for these devices.
The TLV7011 (push-pull) and TLV7021 (open-drain) devices are micro-power comparators that are capable of operating at low voltages. The TLV7011 and TLV7021 feature a rail-to-rail input stage capable of operating up to 100 mV beyond the VCC power supply rail. The TLV7011 and TLV7021 also feature a push-pull and open-drain output stage with internal hysteresis.
The TLV7011 and TLV7021 have a Power-on-Reset (POR) circuit. While the power supply (VS) is ramping up or ramping down, the POR circuitry will be activated.
For the TLV7011, the POR circuit will hold the output low (at VEE) while activated.
For the TLV7021, the POR circuit will keep the output high impedance (logical high) while activated.
When the supply voltage is greater than, or equal to, the minimum supply voltage, the comparator output reflects the state of the differential input (VID).
The TLV7011 and TLV7021 input common-mode extends from VEE to 100 mV above VCC. The differential input voltage (VID) can be any voltage within these limits. No phase-inversion of the comparator output will occur when the input pins exceed VCC and VEE.
While TI recommends operating the TLV7011 and TLV7021 within the specified range of the Electrical Characteristics table, the inputs are fault tolerant to voltages up to 5.5 V independent of the applied VCC value. Fault tolerant is defined as maintaining the same high input impedance when VCC is unpowered or within the recommended operating range. Because the inputs of the TLV7011 and TLV7021 are fault tolerant, the inputs to the comparator can be any value between 0 V and 5.5 V while VCC is ramping up or staying at 0 V. This feature allows any supply and input driven sequence as long as the input value and supply are within the specified ranges. In this case, no current limiting resistor is required. This is possible since the VCC is isolated from the inputs such that it maintains its value even when a higher voltage is applied to the input.
The input bias current is typically 1 pA for input voltages between VCC and VEE. The comparator inputs are protected from undervoltage by internal diodes connected to VEE. As the input voltage goes under VEE, the protection diodes become forward biased and begin to conduct causing the input bias current to increase exponentially. Input bias current typically doubles every 10°C temperature increases.
The device hysteresis transfer curve is shown in Figure 37. This curve is a function of three components: VTH, VOS, and VHYST:
The TLV7011 features a push-pull output stage eliminating the need for an external pullup resistor. On the other hand, the TLV7021 features an open-drain output stage enabling the output logic levels to be pulled up to an external source up to 6 V independently of the supply voltage.