参数资料
型号: EVAL-AD5522EBDZ
厂商: Analog Devices Inc
文件页数: 35/64页
文件大小: 0K
描述: BOARD EVAL FOR 14X14MM AD5522
标准包装: 1
主要目的: 测试与测量,参数测量单元(PMU)
已用 IC / 零件: AD5522
已供物品:
AD5522
Data Sheet
Rev. E | Page 40 of 64
CIRCUIT OPERATION
FORCE VOLTAGE (FV) MODE
Most PMU measurements are performed in force voltage/measure
current (FVMI) mode, for example, when the device is used as a
device power supply, or in continuity or leakage testing. In force
voltage (FV) mode, the voltage forced is mapped directly to the
DUT. The measure voltage amplifier completes the loop, giving
negative feedback to the forcing amplifier (see Figure 54).
The forced voltage can be calculated as follows:
Forced Voltage at DUT = VOUT
VOUT = 4.5 × VREF × (DAC_CODE/216) (3.5 × VREF ×
(OFFSET_DAC_CODE/216)) + DUTGND
where:
VOUT is the voltage of the FIN DAC (see the DAC Levels
section).
DUTGND
MEASVHx
DUT
RSENSE
(UP TO
±80mA)
RSENSE
EXTMEASIHx
EXTMEASILx
FOHx
EXTFOHx
CFFx
FIN
FORCE
AMPLIFIER
INTERNAL RANGE SELECT
(±5A, ±20A, ±200A, ±2mA)
DAC
+
+
×5 OR
×10
×1
AGND
MEASURE VOLTAGE AMPLIFIER
MEASOUTx
VMID TO
CENTER
I RANGE
06197-
033
×1 OR
×0.2
4k
2k
4k
Figure 54. Forcing Voltage, Measuring Current
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