Technical data

SYSTEM CONNECTOR INTERFACE
47
LZT 123 8020 R1A
DAC output electrical characteristics are given in the following
table.
Parameter Limit Units
Resolution 8 Bits
Output voltage for code = 0
(2.75
(6)
x 0.05) ± 0.05
V
Output voltage for code = 255
(2.75
(6)
x 0.95) ± 0.05
V
Nominal step size (2.75
(6)
x 0.9)/256 mV
Absolute error
(7)
≤ ± 0.5
mV
Output wide-band noise and clock
feedthrough 0 - 1.1 MHz
≤ 0.5
mV
rms
Power-supply rejection ratio 50 Hz - 10 kHz
≥ 40
dB
≤ 2 (Load A)
(8)
ms
Conversion rate ± 0.5 LSB
≤ 50 (Load B)
(8)
ms
Output buffer impedance when disabled
≥ 50
kΩ
Output current source or sink
≥ 1
mA
Current consumption (active)
≤ 1.0
mA
(6)
Tolerance on this internal voltage is ± 5 %
(7)
Referred to the ideal conversion characteristic.
(8)
See Figure 5.11
Figure 5.11 DAC loads
5.16.2 Analogue to Digital Converters 1, 2 and 3 - ADCx
The ADC is an 8-bit converter. An analogue value applied to
any of the ADC pins is converted and stored in a register inside