12-bit DAC electrical characteristics
Table 28. VREF full-range operating behaviors
Symbol Description
Min.
Typ.
Max.
Unit
Notes
Vout
Voltage reference output with factory trim at
1.1965
1.2
1.2027
V
nominal VDDA and temperature=25C
Voltage reference output with— factory trim
Voltage reference output — user trim
Voltage reference trim step
Vout
Vout
1.1584
1.198
—
—
—
1.2376
1.202
—
V
V
Vstep
Vtdrift
0.5
—
mV
mV
Temperature drift (Vmax -Vmin across the full
temperature range)
—
80
Ibg
Itr
Bandgap only (MODE_LV = 00) current
—
—
—
—
80
µA
mA
mV
Tight-regulation buffer (MODE_LV =10) current
1.1
ΔVLOAD Load regulation (MODE_LV = 10)
• current = + 1.0 mA
1
—
—
2
5
—
—
• current = - 1.0 mA
Tstup
Buffer startup time
—
—
—
2
100
—
µs
Vvdrift
Voltage drift (Vmax -Vmin across the full voltage
range) (MODE_LV = 10, REGEN = 1)
mV
1. Load regulation voltage is the difference between the VREF_OUT voltage with no load vs. voltage with defined load
Table 29. VREF limited-range operating requirements
Symbol
Description
Min.
Max.
Unit
Notes
Notes
TA
Temperature
0
50
°C
Table 30. VREF limited-range operating behaviors
Symbol
Description
Min.
Max.
Unit
Vout
Voltage reference output with factory trim
1.173
1.225
V
6.7 Timers
See General Switching Specifications.
MCF51JU128 Data Sheet, Rev. 4, 01/2012.
Freescale Semiconductor, Inc.
45
FREESCALE [ Freescale ]
