Datasheet

REV. 0
–3–
ADuC816
Parameter ADuC816BS Unit Test Conditions/Comments
ADC SPECIFICATIONS
Conversion Rate 5.4 Hz min On Both Channels
105 Hz max Programmable in 0.732 ms Increments
Primary ADC
No Missing Codes
2
16 Bits min 20 Hz Update Rate
Resolution 13 Bits p-p typ Range = ± 20 mV, 20 Hz Update Rate
16 Bits p-p typ Range = ± 2.56 V, 20 Hz Update Rate
p-p Resolution at this Range/Update Rate
Setting Is Limited Only by the Number of
Bits Available from ADC
Output Noise See Table IX and X Output Noise Varies with Selected
in ADC Description Update Rate and Gain Range
Integral Nonlinearity ± 1 LSB max
Offset Error ± 3 μV typ
Offset Error Drift ± 10 nV/°C typ
Full-Scale Error
3
± 10 μV typ Range = ± 20 mV to ± 640 mV
0.5 LSB typ Range = ± 1.28 V to ± 2.56 V
Gain Error Drift
4
± 0.5 ppm/°C typ
ADC Range Matching ± 0.5 LSB typ AIN = 18 mV
Power Supply Rejection (PSR) 95 dBs typ AIN = 7.8 mV, Range = ± 20 mV
80 dBs typ AIN = 1 V, Range = ±2.56 V
Common-Mode DC Rejection
On AIN 95 dBs typ At DC, AIN = 7.8 mV, Range = ± 20 mV
90 dBs typ At DC, AIN = 1 V, Range = ± 2.56 V
On REFIN 90 dBs typ At DC, AIN = 1 V, Range = ± 2.56 V
Common-Mode 50 Hz/60 Hz Rejection
2
20 Hz Update Rate
On AIN 95 dBs typ 50 Hz/60 Hz ± 1 Hz, AIN = 7.8 mV,
Range = ± 20 mV
90 dBs typ 50 Hz/60 Hz ±1 Hz, AIN = 1 V,
Range = ±2.56 V
On REFIN 90 dBs typ 50 Hz/60 Hz ±1 Hz, AIN = 1 V,
Range = ±2.56 V
Normal Mode 50 Hz/60 Hz Rejection
2
On AIN 60 dBs typ 50 Hz/60 Hz ± 1 Hz, 20 Hz Update Rate
On REFIN 60 dBs typ 50 Hz/60 Hz ± 1 Hz, 20 Hz Update Rate
Auxiliary ADC
No Missing Codes
2
16 Bits min
Resolution 16 Bits p-p typ Range = ± 2.5 V, 20 Hz Update Rate
Output Noise See Table XI Output Noise Varies with Selected
in ADC Description Update Rate
Integral Nonlinearity ± 1 LSB max
Offset Error –2 LSB typ
Offset Error Drift 1 μV/°C typ
Full-Scale Error
5
–2.5 LSB typ
Gain Error Drift
4
± 0.5 ppm/°C typ
Power Supply Rejection (PSR) 80 dBs typ AIN = 1 V, 20 Hz Update Rate
Normal Mode 50 Hz/60 Hz Rejection
2
On AIN 60 dBs typ 50 Hz/60 Hz ±1Hz
On REFIN 60 dBs typ 50 Hz/60 Hz ±1 Hz, 20 Hz Update Rate
DAC PERFORMANCE
DC Specifications
6
Resolution 12 Bits
Relative Accuracy ± 3 LSB typ
Differential Nonlinearity –1 LSB max Guaranteed 12-Bit Monotonic
Offset Error ± 50 mV max
Gain Error
7
± 1% maxAV
DD
Range
± 1 % typ V
REF
Range
AC Specifications
2, 6
Voltage Output Settling Time 15 μs typ Settling Time to 1 LSB of Final Value
Digital-to-Analog Glitch Energy 10 nVs typ 1 LSB Change at Major Carry
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V,
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications T
MIN
to T
MAX
unless otherwise noted.)
SPECIFICATIONS
1
REV. A