L6460 datasheet(87/139 Pages) STMICROELECTRONICS

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L6460

Operational amplifiers

Doc ID 17713 Rev 1

87/139

Operational amplifiers

L6460 contains two rail to rail output, high bandwidth internally compensated operational

amplifiers supplied by VGPIO_SPI pin. The operative supply range is 3.3 V ± 4.5%

Each operational amplifier can have all pin accessible or, to save pins, can be internally

configured as a buffer. They can also be used as comparators; to do that the user must

disable internal compensation by writing a logic level “1” in the OpXCompMode bit in the

OpAmpXCtrl register.

in Figure 26 are reported the block diagrams of the two operational amplifiers.

Figure 26.

Configurable 3.3 V operational amplifiers

Note:

Op1EnPlusRef and Op2EnPlusRef cannot be used to drive external pin so the user must be

sure not to enable the path between one of these voltage references and the external pin.

GPIO[10]

GPIO[9]

GPIO[11]

To A/D System

VGPIO_SPI

Op1Ref[1:0]

Op1BufConf

Op1EnIntRef

EnOp1

Op1EnMinusPin

Op1EnPlusPin

OpAmp 1

Op1PlusRef

EnOp2

Op2EnPlusPin

Op2EnMinusPin

Op2BufConf

Op2EnIntRef

GPIO[13]

GPIO[12]

GPIO[14]

Op1CompMode

Op2CompMode

Op2PlusRef

Op2Ref[1:0]

VGPIO_SPI

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