參數(shù)資料
型號: ISPPAC-POWR6AT6-01NN32I
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: 電源管理
英文描述: In-System Programmable Power Supply Monitoring and Margining Controller
中文描述: 6-CHANNEL POWER SUPPLY SUPPORT CKT, QCC32
封裝: 5 X 5 MM, LEAD FREE, QFN-32
文件頁數(shù): 10/34頁
文件大小: 906K
代理商: ISPPAC-POWR6AT6-01NN32I
Lattice Semiconductor
ispPAC-POWR6AT6 Data Sheet
10
Theory of Operation
Voltage Measurement with the On-chip Analog to Digital Converter (ADC)
The ispPAC-POWR6AT6 has an on-chip analog to digital converter that can be used for measuring the voltages at
the VMON inputs. The ADC is also used in closed loop trimming of DC-DC converters. Close loop trimming is cov-
ered later in this document.
Figure 6. ADC Monitoring VMON1 to VMON6
Figure 6 shows the ADC circuit arrangement within the ispPAC-POWR6AT6 device. The ADC can measure all ana-
log input voltages through the multiplexer, ADC MUX. The programmable attenuator between the ADC mux and
VMON pins can be configured as divided-by-3 or divided-by-1 (no attenuation). The divided-by-3 setting is used to
measure voltages from 0V to 6V range and divided-by-1 setting is used to measure the voltages from 0V to 2V
range.
A microcontroller can place a request for any VMON voltage measurement at any time through the I
2
C bus. Upon
the receipt of an I
2
C command, the ADC will be connected to the I
2
C selected VMON through the ADC MUX. The
ADC output is then latched into the I
2
C readout registers.
÷3 / ÷1
÷3 / ÷1
÷3 / ÷1
÷3 / ÷1
V
MO
N
1
V
MO
N
2
V
MO
N
3
V
MO
N
4
10
ADC
ADC
MUX
Pro
g
rammable
Attenuator
From Closed
Loop Trim
Circ
u
it
To Closed
Loop Trim
Circ
u
it
To I
2
C
Reado
u
t
Register
Internal
V
REF-
2.04
8V
From I
2
C
ADC MUX
Address
3
+
+
+
+
÷3 / ÷1
V
MO
N
5
+
÷3 / ÷1
V
MO
N
6
+
相關PDF資料
PDF描述
ISPPAC10 In-System Programmable Analog Circuit
ISPPAC10-01PI In-System Programmable Analog Circuit
ISPPAC10-01SI In-System Programmable Analog Circuit
ISPPAC20 In-System Programmable Analog Circuit
ISPPAC20-01J In-System Programmable Analog Circuit
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