804
/
838
Nations Technologies Inc.
Tel
:
+86-755-86309900
:
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
Operational Amplifier (OPAMP)
The OPAMP module can be flexibly configured, suitable for applications such as independent op amp mode ,
programmable gain amplifier and follower mode, The internal op-amps can be configured as combined amplifiers
with different gains or cascaded using external resistors..OPAMP has an input range of 0V to VDDA and an output
range of 0.1V to VDDA-0.1V.
Main features
Four independently configured operational amps
Support track-to-track input, input range is 0 to VDDA, output range is 0.1V to VDDA-0.1V programmable
gain
The OPAMP can be configured as an instrument amplifier through an external resistor connection
The following modes can be configured
Independent op amp mode
Voltage follower
Programmable gain amplifier
Differential op amp of two op amps
Programmable gain settings are 2X, 4X, 8X, 16X, 32X times
Gain bandwidth: 4MHz
Support TIM1_CC6 to automatically switch the input PIN of OPAMP1 and OPAMP2, TIM8_CC6 to
automatically switch the input PIN of OPAMP3 and OPAMP4
Independent write protection is supported
27.1.1
OPAMP function description
The four OPAMPs can be configured for various PGA modes through register selection, and can also be configured
for the user to use the OPAMP function of external components. The output of the OPAMP can be used as the channel
input of the ADC, and the four OPAMP outputs are connected to the analog channels of the ADC as follows.
The output of OPAMP1 is connected to the analog input channel 3 of ADC1
The output of OPAMP2 is connected to the analog input channel 3 of ADC2
The output of OPAMP3 is connected to the analog input channel 1 of ADC3
The output of OPAMP4 is connected to the analog input channel 3 of ADC4