
MEB/0404
© 2004 Texas Instruments Inc, Slide 22
Precision Operational Amplifiers
• Rail-to-rail
input/output
• 0.5nA bias
• 10mV offset
• 10uV/C
• 70dB CMRR
• 70dB PSRR
•2.5MHz UGB
Three very flexible
amplifier blocks
N
e
w
!
OA1
OA2
OA0R
BOTTOM
OA0
+
-
OA1R
BOTTOM
OA0TAP
OA0I0
OA0I1
OA2TAP
OA0I0
OA0I1
OA2OUT
A1 int./ext.
A12 int.
OA0I0
OA0I1
DAC12_0
DAC12_1
DAC12_0
DAC12_1
Vss
Vss
Vcc
OA1
OA2
OA0R
BOTTOM
OA0
+
-
OA1R
BOTTOM
OA0TAP
OA0I0
OA0I1
OA2TAP
OA0I0
OA0I1
OA2OUT
A1 int./ext.
A12 int.
OA0I0
OA0I1
DAC12_0
DAC12_1
DAC12_0
DAC12_1
Vss
Vss
Vcc
The new OA op amps on the MSP430FG43x support front-end analog signal conditioning
prior to analog-to- digital conversion.
Features of the OA include:
•Single supply, low-current operation
•Rail-to-rail output
•Software selectable Rail-to-Rail input
•Programmable settling time vs. power consumption
•Software selectable configurations
•Software selectable feedback resistor ladder for PGA implementations
Because the are three op amps integrated in the MSP430FG43x, the amplifiers can be
combined to create user-defined analog functions such as differential and programmable
gain amplifiers.
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