Datasheet

ADuC814
Rev. A | Page 4 of 72
SPECIFICATIONS
Table 1. 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, XTAL1/XTAL2 = 32.768 kHz crystal. All
specifications T
MIN
to T
MAX
, unless otherwise specified
1
Parameter V
DD
= 5 V V
DD
= 3 V Unit Test Conditions
ADC CHANNEL SPECIFICATIONS
A GRADE
DC ACCURACY
2,3
f
SAMPLE
= 147 kHz
Resolution 12 12 Bits
Integral Nonlinearity 2 2 LSB max 2.5 V internal reference
1 1 LSB typ
2.5 2.5 LSB typ 1.0 V external reference
Differential Nonlinearity 4 4 LSB max 2.5 V internal reference
2 2 LSB typ
5 5 LSB typ 1.0 V external reference
CALIBRATED ENDPOINT ERRORS
4, 5
Offset Error 5 5 LSB max
Offset Error Match 1 1 LSB typ
Gain Error 5 5 LSB max
Gain Error Match 1 1 LSB typ
DYNAMIC PERFORMANCE
6
f
IN
= 10 kHz sine wave
f
SAMPLE
= 147 kHz
Signal to Noise Ratio (SNR)
7
62.5 62.5 dB typ
Total Harmonic Distortion (THD) –65 –65 dB typ
Peak Harmonic or Spurious Noise –65 –65 dB typ
Channel-to-Channel Crosstalk
8
–80 –80 dB typ
B GRADE
DC ACCURACY
2, 3
f
SAMPLE
= 147 kHz
Resolution 12 12 Bits
Integral Nonlinearity 1 1 LSB max 2.5 V internal reference
0.3 0.3 LSB typ
1.5 1.5 LSB max 1.0 V external reference
11
Differential Nonlinearity 0.9 0.9 LSB max 2.5 V internal reference
0.25 0.25 LSB typ
+1.5/–0.9 1.5/–0.9 LSB max 1.0 V external reference
11
Code Distribution 1 1 LSB typ ADC input is a dc voltage
CALIBRATED ENDPOINT ERRORS
4, 5
Offset Error 2 3 LSB max
Offset Error Match 1 1 LSB typ
Gain Error 2 3 LSB max
Gain Error Match 1 1 LSB typ
DYNAMIC PERFORMANCE
6
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