User Manual

Jennic
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Jennic
56 JN-DS-JN5139 v1.5 © Jennic 2008
17.3.7 Bandgap Reference
VDD = 2.2 to 3.6V, -40 to +85ºC
Parameter Min Typ Max Unit Notes
Voltage 1.134 1.176 1.217 V
DC power supply rejection -58 DB at 25ºC
Temperature coefficient -82
+40
ppm/°C 0 to 85ºC
-40ºC to 0ºC
Point of inflexion 0 ºC
17.3.8 Analogue to Digital Converters
VDD = 3.0V, VREF = 1.2V, -40 to +85ºC
Parameter Min Typ Max Unit Notes
Resolution 12 bits 500kHz Clock
Current consumption 655 µA
Integral nonlinearity ± 2 LSB
Differential nonlinearity -1 +2 LSB Guaranteed monotonic
Offset error ± 10 mV
Gain error ± 20 mV
Internal clock 500 kHz
16MHz input clock, ÷ 32
No. internal clock periods
to sample input
2, 4, 6 or 8 Programmable
Conversion time 40 µs 500KHz Clock with
sample period of 2
Input voltage range 0 to Vref
or 0 to
2*Vref
V Switchable
Vref (Internal) See Section 17.3.7 Bandgap Reference
Vref (External) 1.15 1.2 1.6 V Allowable range into
VREF pin
Input capacitance 8 pF In series with 5K ohms