Datasheet

ADuC836
–2–
ADuC836
–3–
(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 specications T
MIN
to T
MAX
, unless otherwise noted.)
Parameter ADuC836 Test Conditions/Comments Unit
ADC SPECIFICATIONS
Conversion Rate 5.4 On Both Channels Hz min
105 Programmable in 0.732 ms Increments Hz max
Primary ADC
No Missing Codes
2
16 20 Hz Update Rate Bits min
Resolution 13.5 Range = ±20 mV, 20 Hz Update Rate Bits p-p typ
16 Range = ±2.56 V, 20 Hz Update Rate Bits p-p typ
Output Noise See Tables X and XI in Output Noise Varies with Selected
ADuC836 ADC Description Update Rate and Gain Range
Integral Nonlinearity ±15 1 LSB ppm of FSR max
Offset Error
3
±3 V typ
Offset Error Drift ±10 nV/°C typ
Full-Scale Error
4
±10 Range = ±20 mV to ±640 mV V typ
±0.5 Range = ±1.28 V to ±2.56 V LSB typ
Gain Error Drift
5
±0.5 ppm/°C typ
ADC Range Matching ±2 AIN = 18 mV V typ
Power Supply Rejection (PSR) 95 AIN = 7.8 mV, Range = ±20 mV dBs typ
80 AIN = 1 V, Range = ±2.56 V dBs typ
Common-Mode DC Rejection
On AIN 95 At DC, AIN = 7.8 mV, Range = ±20 mV dBs typ
113 At DC, AIN = 1 V, Range = ±2.56 V dBs typ
On REFIN 125 At DC, AIN = 1 V, Range = ±2.56 V dBs typ
Common-Mode 50 Hz/60 Hz Rejection 20 Hz Update Rate
On AIN 95 50 Hz/60 Hz ±1 Hz, AIN = 7.8 mV, dBs typ
Range = ±20 mV
90 50 Hz/60 Hz ±1 Hz, AIN = 1 V, dBs typ
Range = ±2.56 V
On REFIN 90 50 Hz/60 Hz ±1 Hz, AIN = 1 V, dBs typ
Range = ±2.56 V
Normal Mode 50 Hz/60 Hz Rejection
On AIN 60 50 Hz/60 Hz ±1 Hz, 20 Hz Update Rate dBs typ
On REFIN 60 50 Hz/60 Hz ±1 Hz, 20 Hz Update Rate dBs typ
Auxiliary ADC
No Missing Codes
2
16 Bits min
Resolution 16 Range = ±2.5 V, 20 Hz Update Rate Bits p-p typ
Output Noise See Table XII in ADuC836 Output Noise Varies with Selected
ADC Description Update Rate
Integral Nonlinearity ±15 ppm of FSR max
Offset Error
3
–2 LSB typ
Offset Error Drift 1 V/°C typ
Full-Scale Error
6
–2.5 LSB typ
Gain Error Drift
5
±0.5 ppm/°C typ
Power Supply Rejection (PSR) 80 AIN = 1 V, 20 Hz Update Rate dBs typ
Normal Mode 50 Hz/60 Hz Rejection
On AIN 60 50 Hz/60 Hz ±1 Hz dBs typ
On REFIN 60 50 Hz/60 Hz ±1 Hz, 20 Hz Update Rate dBs typ
DAC PERFORMANCE
DC Specications
7
Resolution 12 Bits
Relative Accuracy ±3 LSB typ
Differential Nonlinearity –1 Guaranteed 12-Bit Monotonic LSB max
Offset Error ±50 mV max
Gain Error
8
±1 AV
DD
Range % max
±1 V
REF
Range % typ
AC Specications
2, 7
Voltage Output Settling Time 15 Settling Time to 1 LSB of Final Value s typ
Digital-to-Analog Glitch Energy 10 1 LSB Change at Major Carry nVs typ
SPECIFICATIONS
1
REV. A
REV. A