Datasheet

ADuC832 Data Sheet
Rev. B | Page 6 of 92
SPECIFICATIONS
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, f
CORE
= 16.78 MHz; all specifications T
A
= T
MIN
to T
MAX
,
unless otherwise noted.
Table 1.
Parameter
1
V
DD
= 5 V V
DD
= 3 V Unit Test Conditions/Comments
ADC CHANNEL SPECIFICATIONS
DC Accuracy
2, 3
f
S
= 147 kHz, see Figure 16 to Figure 21 at
other f
S
Resolution 12 12 Bits
Integral Nonlinearity ±1 ±1 LSB max For 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 ±4 LSB max
Offset Error Match ±1 ±1 LSB typ
Gain Error ±2 ±3 LSB max
Gain Error Match −85 −85 dB typ
Dynamic Performance f
IN
= 10 kHz sine wave, f
S
= 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, INTERNAL BUFFER
ENABLED
DAC load to AGND, R
L
= 10 kΩ, C
L
= 100 pF
DC Accuracy
10
Resolution 12 12 Bits
Relative Accuracy ±3 ±3 LSB 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 % max AV
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 ½ LSB of final
value
Digital-to-Analog Glitch Energy 10 10 nV sec typ 1 LSB change at major carry