P89LPC9331_9341_9351_9361 NXP Semiconductors, P89LPC9331_9341_9351_9361 Datasheet - Page 61

• Manufacturer Part Number: P89LPC9331_9341_9351_9361
• Description: The P89LPC9331/9341/9351/9361 is a single-chip microcontroller, available in low costpackages, based on a high performance processor architecture that executes instructionsin two to four clocks, six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89LPC9331_9341_9351_9361
Product data sheet
Fig 24. P89LPC9351/9361 ADC block diagram
AD10
AD11
AD12
AD13
V
ref(bg)
AD00
AD01
AD02
AD03
V
sen
8.4 PGA (P89LPC9351/9361)
8.5 Temperature sensor
Additional PGA module is integrated in each ADC module to improve the effective
resolution of the ADC. A single channel can be selected for amplification. The gain of PGA
can be programmable to 2, 4, 8 and 16. Please refer to
detailed specifications.
Register PGACONx and PGACONxB are used to for PGA configuration. Register
PGAxTRIM2X4X and PGAxTRIM8X16X provide trim value of PGA gain level. As
power-on, default trim value for each gain setting is loaded into the PGA trim registers.
For accurate measurements, offset calibration is required.
Please see the P89LPC9331/9341/9351/9361 User manual for detail configuration,
calibration, and usage information.
An on-chip wide-temperature range temperature sensor is integrated with ADC0 module.
It provides temperature sensing capability of −40 °C ~ 85 °C. It is necessary to measure
the 1.2 V reference voltage via the ADC before measuring temperature. In
P89LPC9351/9361, the reference voltage, temperature sensor and AD03 input pin
multiplex one input to PGA0. Please see the P89LPC9331/9341/9351/9361 User manual
for detail usage of temperature sensor.
PGA1
PGA0
Anin00
Anin01
Anin02
Anin03
Anin10
Anin11
Anin12
Anin13
All information provided in this document is subject to legal disclaimers.
input MUX
input MUX
Rev. 5 — 10 January 2011
8-bit microcontroller with accelerated two-clock 80C51 core
4
P89LPC9331/9341/9351/9361
to comparators
comp
comp
+
–
+
–
DAC0
DAC1
Table 12 “Static characteristics”
CCLK
SAR
SAR
8
8
© NXP B.V. 2011. All rights reserved.
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