参数资料
型号: EVAL-AD5520EBZ
厂商: Analog Devices Inc
文件页数: 9/24页
文件大小: 0K
描述: BOARD EVAL FOR AD5520
标准包装: 1
主要目的: 测试与测量,每引脚参数测量单元(PPMU)
已用 IC / 零件: AD5520
已供物品:
相关产品: AD5520JSTZ-ND - IC PPMU SNGL-CH 64-LQFP
AD5520
Rev. B | Page 17 of 24
FORCE CURRENT
In force current mode, the voltage at FIN is now converted to a
current through the following relationship:
Force Current = VFIN/(RSENSE × 16)
Figure 24 shows a simplified diagram of the PMU when in force
current mode. The control loop consists of the force amplifier
with the current sense amplifier making up the feedback path.
In this case, voltage at the DUT is sensed across the voltage
measure amplifier (Gain = 1) and presented at the MEASVOUT
output.
MEASIHx
MEASIL
G= 16
MEASVH
MEASVL
G = 1
FOHx
RS
RDUT
FIN
VMEASIOUT
VMEASVOUT
ME
AS
IOUT
M
E
A
SVOU
T
CLH
CLL
VCLL
VCLH
VFIN
CONDITION
OUTPUT
VCLH > VDUT
VCLL < VDUT
VCLH > VDUT
VCLL > VDUT
VCLH < VDUT
VCLL < VDUT
REFGNDI/V
V
03701-
024
IDUT =
RS
VFIN
IDUT =
RS
VCLH
IDUT =
RS
VCLL
Figure 24. Current Force, Voltage Measure Mode
MEASURE VOLTAGE
A DUT voltage is tested via the voltage measure amplifier by a
window comparator to ensure that CPH and CPL levels are not
exceeded. In addition, the DUT voltage is automatically tested
against the voltage levels at the clamp, and clamp flags are
enabled if the DUT voltage exceeds either of the levels.
SHORT CIRCUIT PROTECTION
The AD5520 is designed to withstand a direct short circuit on
any of the amplifier outputs.
Figure 25 illustrates the transfer function of the current force
mode.
IDUT
RDUT
VCLL
RDUT
VCLH
VDUT
VFIN
03701-025
Figure 25. Current Force Transfer Function
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