Datasheet

LPC4370 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 2 — 21 October 2013 135 of 150
NXP Semiconductors
LPC4370
32-bit ARM Cortex-M4/M0 microcontroller
The allowed input range for Vin_neg, if supplied externally on pin ADCHS_NEG, is
350 mV  Vin_neg  900 mV. See Figure 45
.
For the internally generated negative reference voltage Vin_neg = 500 mV, one of the
following circuits are recommended for the ADC channel input:
1. Inverting single-ended with gain = 1 or for input range 0 V to 3.3 V
2. Non-inverting single-ended with gain = 1
3. Non-inverting singe-ended for input range 0 V to 3.3 V
Fig 45. Positive input voltage as a function of the externally supplied negative voltage
Vin_neg (on pin ADCHS_NEG)
Vin_neg (mV)
Vin_pos
(mV)
350
850
400 800
0
750
1200
800
400
450
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