Datasheet

ADuC841/ADuC842/ADuC843
Rev. 0 | Page 3 of 88
SPECIFICATIONS
1
Table 1. AV
DD
= DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V; V
REF
= 2.5 V internal reference, f
CORE
= 16.78 MHz @ 5 V 8.38 MHz @ 3 V;
all specifications T
A
= T
MIN
to T
MAX
, unless otherwise noted
Parameter V
DD
= 5 V V
DD
= 3 V Unit Test Conditions/Comments
ADC CHANNEL SPECIFICATIONS
DC ACCURACY
2, 3
f
SAMPLE
= 120 kHz, see the Typical
Performance Characteristics for typical
performance at other values of f
SAMPLE
Resolution 12 12 Bits
Integral Nonlinearity ±1 ±1 LSB max 2.5 V internal reference
±0.3 ±0.3 LSB typ
Differential Nonlinearity +1/–0.9 +1/–0.9 LSB max 2.5 V internal reference
±0.3 ±0.3 LSB typ
Integral Nonlinearity
4
±2 ±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 ±3 ±2 LSB max
Offset Error Match ±1 ±1 LSB typ
Gain Error ±3 ±2 LSB max
Gain Error Match ±1 ±1 LSB typ
DYNAMIC PERFORMANCE f
IN
= 10 kHz sine wave
f
SAMPLE
= 120 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 Range 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 700 700 mV typ
Voltage TC –1.4 –1.4 mV/°C typ
Accuracy ±1.5 ±1.5 °C typ Internal/External 2.5 V V
REF
DAC CHANNEL SPECIFICATIONS
DAC load to AGND
Internal Buffer Enabled
ADuC841/ADuC842 Only
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