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參數(shù)資料
| 型號(hào)： | MAX9952FCCB+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PMU DUAL 64TQFP |
| 標(biāo)準(zhǔn)包裝： | 750 |
| 系列： | * |
MAX9951/MAX9952
Dual Per-Pin Parametric
Measurement Units
20
Maxim Integrated
the inverting input of the voltage amplifier. SENSE_
samples the voltage at the DUT and provides a
buffered result at MSR_.
High-Impedance States
The FORCE_, MSR_, and comparator outputs feature
individual high-impedance control that places them into
a high-impedance, low-leakage state. The high-imped-
ance state allows busing of MSR_ and comparator out-
puts with other PMU measure and comparator outputs.
The FORCE_ output high-impedance state allows for
additional modes of operation as described in Table 5
and can eliminate the need for a series relay in some
applications.
The FORCE_, MSR_, and comparator outputs power up
in the high-impedance state.
Input Source Selection
Either one of two input signals, IN0_ or IN1_, can con-
trol both the forced voltage and the forced current. In
this case, the two input signals represent alternate forc-
ing values that can be selected either with the serial
interface or INSEL_. Alternatively, each input signal can
be dedicated to control a single forcing function (i.e.,
voltage or current).
Short-Circuit Protection
FORCE_ and SENSE_ input can withstand a short to
any voltage between the supply rails.
Mode and Range Change Transients
The MAX9951/MAX9952 feature make-before-break
switching to minimize glitches. The integrated voltage
clamps also reduce glitching at the output.
DUT Voltage Swing vs. DUT Current
and Power-Supply Voltages
Several factors limit the actual DUT voltage that the
PMU delivers:
The overhead required by the device amplifiers and
other integrated circuitry; this is typically 2.5V from
each rail independent of load.
The voltage drop across the current-range select
resistor and internal circuitry in series with the sense
resistor. At full current, the combined voltage drop is
typically 2.5V.
Variations in the power supplies.
Variation of DUT ground vs. PMU ground.
Neglecting the effects of the third and fourth items,
Figure 8 demonstrates the force-output capabilities of
the PMU. For zero DUT current, the DUT voltage swings
from (VEE + 2.5V) to (VCC - 2.5V). For larger positive DUT
currents, the positive swing drops off linearly until it
reaches (VCC - 5V) at full current. Similarly, for larger
negative DUT currents, the negative voltage swing drops
off linearly until it reaches (VEE + 5V) at full current.
IN1_
MSR_
AV = +4
DUT
DUTGND
FORCE_
SENSE_
RSENSE
Figure 7. Force-Current/Measure-Voltage Functional Diagram
IDUT_
VDUT_
IMIN
IMAX
VEE + 5V
VEE + 2.5V
VCC - 5V
VCC - 2.5V
Figure 8. PMU Force-Output Capability
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