TLV9064IPWR datasheet(21/93 Pages) TI

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6.3 Feature Description

6.3.1 Rail-to-Rail Input

The input common-mode voltage range of the TLV906x family extends 100mV beyond the supply rails for the

full supply voltage range of 1.8V to 5.5V. This performance is achieved with a complementary input stage: an

N-channel input differential pair in parallel with a P-channel differential pair, as shown in the Functional Block

Diagram. The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.4V to 200mV

above the positive supply, whereas the P-channel pair is active for inputs from 200mV below the negative supply

to approximately (V+) – 1.4V. There is a small transition region, typically (V+) – 1.2V to (V+) – 1V, in which both

pairs are on. This 200-mV transition region can vary up to 200mV with process variation. Thus, the transition

region (with both stages on) can range from (V+) – 1.4V to (V+) – 1.2V on the low end, and up to (V+) – 1V to

(V+) – 0.8V on the high end. Within this transition region, PSRR, CMRR, offset voltage, offset drift, and THD can

degrade compared to device operation outside this region.

6.3.2 Rail-to-Rail Output

Designed as a low-power, low-voltage operational amplifier, the TLV906x series delivers a robust output drive

capability. A class AB output stage with common-source transistors achieves full rail-to-rail output swing

capability. For resistive loads of 10kΩ, the output swings to within 15mV of either supply rail, regardless of

the applied power-supply voltage. Different load conditions change the ability of the amplifier to swing close to

the rails.

6.3.3 EMI Rejection

The TLV906x uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from

sources such as wireless communications and densely-populated boards with a mix of analog signal chain and

digital components. EMI immunity can be improved with circuit design techniques; the TLV906x benefits from

these design improvements. Texas Instruments has developed the ability to accurately measure and quantify the

immunity of an operational amplifier over a broad frequency spectrum extending from 10MHz to 6GHz. Figure

6-1 shows the results of this testing on the TLV906x. Table 6-1 lists the EMIRR IN+ values for the TLV906x at

particular frequencies commonly encountered in real-world applications. See EMI Rejection Ratio of Operational

Amplifiers application note for more information.

100

120

140

10M

100M

Frequency (Hz)

C041

Figure 6-1. EMIRR Testing

Table 6-1. TLV906x EMIRR IN+ For Frequencies of Interest

FREQUENCY

APPLICATION or ALLOCATION

EMIRR IN+

400MHz

Mobile radio, mobile satellite, space operation, weather, radar, ultra-high frequency (UHF)

applications

59.5dB

900MHz

Global system for mobile communications (GSM) applications, radio communication, navigation,

GPS (to 1.6GHz), GSM, aeronautical mobile, UHF applications

68.9dB

1.8 GHz

GSM applications, mobile personal communications, broadband, satellite, L-band (1GHz to 2GHz)

77.8dB

2.4GHz

802.11b, 802.11g, 802.11n, Bluetooth®, mobile personal communications, industrial, scientific and

medical (ISM) radio band, amateur radio and satellite, S-band (2GHz to 4GHz)

78.0dB

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TLV9061, TLV9062, TLV9064

SBOS839L – MARCH 2017 – REVISED SEPTEMBER 2024

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