POWR6AT6 Datasheet, PDF (6/34 Pages) Lattice Semiconductor – In-System Programmable Power Supply Monitoring and Margining Controller

Lattice Semiconductor
ispPAC-POWR6AT6 Data Sheet
Margin/Trim DAC Output Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Resolution
8(7+sign)
bits
FSR
Full scale range
+/-320
mV
LSB
LSB step size
2.5
mV
I_OUT
Output source/sink current
Offset 1
-125
125
µA
0.6
V_BPZ
Bipolar zero output voltage
(code=80h)
Offset 2
Offset 3
0.8
V
1.0
Offset 4
1.25
DAC code changed
from 80H to FFH or
TS
TrimCell output voltage settling
time¹
80H to 00H
Single DAC code
change
2.5
ms
256
µs
C_LOAD
Maximum load capacitance
50
pF
T_UPDATEM
Update time through I²C port²
260
µs
TOSE
Total open loop supply voltage
error³
Full scale DAC corre-
sponds to ±5% supply
voltage variation
-0.75
+0.75
%
1. To 1% of set value with 50pf load connected to trim pins.
2. Total time required to update a single TRIMx output value by setting the associated DAC through the I²C port.
3. This is the total resultant error in the trimmed power supply output voltage referred to any DAC code due to the DAC’s INL, DNL, gain, out-
put impedance, offset error and bipolar offset error across the industrial temperature range and the ispPAC-POWR6AT6 operating V_CCA
and V_CCD ranges.
ADC Characteristics
Symbol
Parameter
Conditions
Min. Typ.
ADC resolution
10
Programmable attenuator = 1
0
VIN
Input range full scale
Programmable attenuator = 3
0
T_CONVERT
Conversion complete time
Time from I²C request to complete one
conversion cycle
ADC Step Size LSB
Programmable attenuator = 1
2
Programmable attenuator = 3
6
Eattenuator Error due to attenuator
Programmable attenuator = 3
+/- 0.1
1. Maximum voltage is limited by V_MONX pin (theoretical maximum is 6.144V).
2. Minimum time to wait for valid ADC result. Applies when not reading the DONE status bit (via I²C) to determine ADC.
Max.
2.048
5.75¹
200²
Units
Bits
V
V
µs
mV
mV
%
ADC Error Budget Across Entire Operating Temperature Range
Symbol
Parameter
Conditions
Min.
Measurement Range 600 mV to 2.048V,
VMONxGS > -100mV, Attenuator =1
-8
TADC Error
Total Measurement Error at Measurement Range 600 mV to 2.048V,
Any Voltage¹
VMONxGS > -200mV, Attenuator =1
Measurement Range 0 to 2.048V,
VMONxGS > -200mV, Attenuator =1
1. Total error, guaranteed by characterization, includes INL, DNL, Gain, Offset, and PSR specs of the ADC.
Typ.
+/-4
+/-6
+/-10
Max.
8
Units
mV
mV
mV
6