SmartFusion Customizable System-on-Chip (cSoC)
Revision 10 2-85
Analog Sigma-Delta Digital to Analog Converter (DAC)
Unless otherwise noted, sigma-delta DAC performance is specified at 25°C with nominal power supply
voltages, using the internal sigma-delta modulators with 16-bit inputs, HCLK = 100 MHz, modulator
inputs updated at a 100 KHz rate, in voltage output mode with an external 160 pF capacitor to ground,
after trimming and digital [pre-]compensation.
Table 2-99 • Analog Sigma-Delta DAC
Specification Test Conditions Min. Typ. Max. Units
Resolution 8 24 Bits
Output range 0 to 2.56 V
Current output mode 0 to 256 µA
Output Impedance 6 10 12 K
Current output mode 10 M
Output voltage compliance Current output mode 0–3.0 V
–40ºC to +100ºC 0–2.7 0–3.4 V
Gain error Voltage output mode 0.3 ±2 %
A2F060: –40ºC to +100ºC 0.3 ±2 %
A2F200: –40ºC to +100ºC 1.2 ±5.3 %
A2F500: –40ºC to +100ºC 0.3 ±2 %
Current output mode 0.3 ±2 %
A2F060: –40ºC to +100ºC 0.3 ±2 %
A2F200: –40ºC to +100ºC 1.2 ±5.3 %
A2F500: –40ºC to +100ºC 0.3 ±2 %
Output referred offset DACBYTE0 = h’00 (8-bit) 0.25 ±1 mV
–40ºC to +100ºC 1 ±2.5 mV
Current output mode 0.3 ±1 µA
–40ºC to +100ºC 1 ±2.5 µA
Integral non-linearity RMS deviation from BFSL 0.1 0.3 % FS*
Differential non-linearity 0.05 0.4 % FS*
Analog settling time Refer to
Figure 2-45 on
page 2-86
µs
Power supply rejection ratio DC, full scale output 33 34 dB
Note: *FS is full-scale error, defined as the difference between the actual value that triggers the transition to full-scale
and the ideal analog full-scale transition value. Full-scale error equals offset error plus gain error. Refer to the
Analog-to-Digital Converter chapter of the SmartFusion Programmable Analog User’s Guide for more
information.