TLV9041UIDBVR datasheet(24/61 Pages) TI

24 / 61 page

5 kW

10-mA maximum

V+

OUT

OVERLOAD

Device

Figure 8-6. Input Current Protection

8.3.10 Shutdown Function

The TLV904xS devices feature SHDN pins that disable the op amp, placing it into a low-power standby mode.

In this mode, the op amp typically consumes less than 150 nA. The SHDN pins are active low, meaning that

shutdown mode is enabled when the input to the SHDN pin is a valid logic low.

The SHDN pins are referenced to the negative supply voltage of the op amp. The threshold of the shutdown

feature lies around 500 mV (typical) and does not change with respect to the supply voltage. Hysteresis has

been included in the switching threshold to ensure smooth switching characteristics. To ensure optimal shutdown

behavior, the SHDN pins should be driven with valid logic signals. A valid logic low is defined as a voltage

between V– and V– + 0.2 V. A valid logic high is defined as a voltage between V– + 1 V and V+. To enable the

amplifier, the SHDN pins must be driven to a valid logic high. To disable the amplifier, the SHDN pins must be

driven to a valid logic low. We highly recommend that the shutdown pin be connected to a valid high or a low

voltage or driven. The maximum voltage allowed at the SHDN pins is (V+) + 0.5 V. Exceeding this voltage level

will damage the device.

The SHDN pins are high-impedance CMOS inputs. Dual op amp versions are independently controlled and

quad op amp versions are controlled in pairs with logic inputs. For battery-operated applications, this feature

may be used to greatly reduce the average current and extend battery life. The enable time is 160 µs for

full shutdown of all channels; disable time is 10 µs. When disabled, the output assumes a high-impedance

state. This architecture allows the TLV904xS to be operated as a gated amplifier (or to have the device output

multiplexed onto a common analog output bus). Shutdown time (tOFF) depends on loading conditions and

increases as load resistance increases. To ensure shutdown (disable) within a specific shutdown time, the

specified 100-kΩ load to midsupply (VS / 2) is required. If using the TLV904xS without a load, the resulting turnoff

time is significantly increased.

8.3.11 Packages With an Exposed Thermal Pad

The TLV904x family is available in packages such as the WQFN-16 (RTE) which feature an exposed thermal

pad. Inside the package, the die is attached to this thermal pad using an electrically conductive compound. For

this reason, when using a package with an exposed thermal pad, the thermal pad must either be connected to

V– or left floating. Attaching the thermal pad to a potential other then V– is not allowed, and the performance of

the device is not assured when doing so.

8.4 Device Functional Modes

The TLV904x devices have a single functional mode. These devices are powered on as long as the power-

supply voltage is between 1.2 V (±0.6 V) and 5.5 V (±2.75 V).

The TLV904xS devices feature a shutdown pin, which can be used to place the op amp into a low-power mode.

See Section 8.3.10 for more information.

TLV9041, TLV9042, TLV9044

SBOS836G – MARCH 2020 – REVISED MARCH 2022

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