2
dc1540bf
DEMO MANUAL DC1540B
Table 1. LTC2977 Performance Summary (Specifications are at T
A
= 25°C)
PARAMETER
CONDITION
VALUE
V
PWR
Supply Input Voltage Range
4.5V to 15V
V
DD33
Supply Input Voltage Range
3.13V to 3.47V
ADC Total Unadjusted Error
V
IN
≥ 1V
±0.25%
ADC Voltage Sensing Input Range
–0.1V to 6V
ADC Current Sensing Input Range
–170mV to 170mV
ADC Voltage Sensing Resolution
0V ≤ V
IN_ADC
≤ 6V
122µV/LSB
ADC Current Sense Resolution
0mV <|V
IN_ADC
| < 16mV
16mV <|V
IN_ADC
| < 32mV
32mV <|V
IN_ADC
| < 63.9mV
63.9mV <|V
IN_ADC
| <127.9mV
127.9mV <|V
IN_ADC
|
15.6µV/LSB
31.25µV/LSB
62.5µV/LSB
125µV/LSB
250µV/LSB
Voltage Buffered IDAC Resolution
10 bits
Buffer gain setting 0
1.38mV/LSB
Buffer gain setting 1
2.65mV/LSB
Temperature Sensor TUE
±1°C
Voltage Supervisor Input Voltage
Range (Programmable)
V
SENSEP[n]
Low resolution
0 to 6V
High resolution
0 to 3.8V
V
SENSEM[n]
–0.1 to 0.1V
Voltage Supervisor Sensing Resolution
0V to 3.8V range: 4.096/1024
4mV/LSB
0V to 6V range: 8.192/1024
8mV/LSB
Voltage Supervisor
Total Unadjusted Error
2V < V
IN_VS
< 6V, Low Resolution Mode
±1.25 %
1.5V < V
IN_VS
< 3.8V, High Resolution Mode
±1.0 %
0.8V < V
IN_VS
< 1.5V, High Resolution Mode
±1.5 %
I
2
C Serial Clock Frequency
10kHz to 400kHz
Demo System Specifications
Table 2. Specifications-DC1361B
V
OUT
Name
Nominal Voltage-Untrimmed
V
OUT_0
3.325V ± 1.5%
V
OUT_1
2.497V ± 1.5%
V
OUT_2
1.989V ± 1.5%
V
OUT_3
1.804V ± 1.5%
V
OUT_4
1.502V ± 1.5%
V
OUT_5
1.200V ± 1.5%
V
OUT_6
0.999V ± 1.5%
V
OUT_7
0.799V ± 1.5%
Notes:
• Load current less than 2A on each output is recommended.
• Max current into J11 (+12V) should be < 6A max.
• Output voltages can be margined by a minimum of
±15% from nominal with the default resistor values
on the DC1361B. These values can be easily changed.
See section Changing DC1361B Nominal Output Volt-
ages. Use the LTC2977 Resistor Selection Tool which
is accessed from LTpowerPlay.
