Datasheet

REV. 0 –3–
Parameter V
DD
= 5 V V
DD
= 3 V Unit Test Conditions/Comments
ADC CHANNEL SPECIFICATIONS
DC ACCURACY
2, 3
f
SAMPLE
= 147 kHz, see Page 11 for
Typical Performance at other f
SAMPLE
Resolution 12 12 Bits
Integral Nonlinearity ±1 ±1LSB max 2.5 V Internal Reference
±0.3 ±0.3 LSB typ
Differential Nonlinearity ±0.9 ±0.9 LSB max 2.5 V Internal Reference
±0.25 ±0.25 LSB typ
Integral Nonlinearity
4
±1.5 ±1.5 LSB max 1 V External Reference
Differential Nonlinearity
4
+1.5/-0.9 +1.5/–0.9 LSB max 1 V External Reference
Code Distribution 1 1 LSB typ ADC Input is a DC Voltage
CALIBRATED ENDPOINT ERRORS
5, 6
Offset Error ±4 ±4LSB max
Offset Error Match ±1 ±1LSB typ
Gain Error ±2 ±3LSB max
Gain Error Match –85 –85 dB typ
DYNAMIC PERFORMANCE f
IN
= 10 kHz Sine Wave
f
SAMPLE
= 147 kHz
Signal-to-Noise Ratio (SNR)
7
71 71 dB typ
Total Harmonic Distortion (THD) –85 –85 dB typ
Peak Harmonic or Spurious Noise –85 –85 dB typ
Channel-to-Channel Crosstalk
8
–80 –80 dB typ
ANALOG INPUT
Input Voltage Ranges 0 to V
REF
0 to V
REF
V
Leakage Current ±1 ±1 µA max
Input Capacitance 32 32 pF typ
TEMPERATURE SENSOR
9
Voltage Output at 25°C 650 650 mV typ
Voltage TC –2.0 –2.0 mV/°C typ
Accuracy ±3 ±3 °C typ Internal 2.5 V V
REF
±1.5 ±1.5 °C typ External 2.5 V V
REF
DAC CHANNEL SPECIFICATIONS DAC Load to AGND
Internal Buffer Enabled R
L
= 10 kΩ, C
L
= 100 pF
DC ACCURACY
10
Resolution 12 12 Bits
Relative Accuracy ±3 ±3LSB typ
Differential Nonlinearity
11
–1 –1 LSB max Guaranteed 12-bit Monotonic
±1/2 ±1/2 LSB typ
Offset Error ±50 ±50 mV max V
REF
Range
Gain Error ±1 ±1% maxAV
DD
Range
±1 ±1% typ V
REF
Range
Gain Error Mismatch 0.5 0.5 % typ % of Full Scale on DAC1
ANALOG OUTPUTS
Voltage Range_0 0 to V
REF
0 to V
REF
V typ DAC V
REF
= 2.5 V
Voltage Range_1 0 to V
DD
0 to V
DD
V typ DAC V
REF
= V
DD
Output Impedance 0.5 0.5 Ω typ
DAC AC CHARACTERISTICS
Voltage Output Settling Time 15 15 µs typ Full-Scale Settling Time to
within 1/2 LSB of Final Value
Digital-to-Analog Glitch Energy 10 10 nV sec typ 1 LSB Change at Major Carry
(AV
DD
= DV
DD
= 2.7 V to 3.3 V or 4.5 V to 5.5 V. V
REF
= 2.5 V Internal Reference, MCLKIN = 16 MHz,
all specifications T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
SPECIFICATIONS
1
ADuC831