参数资料
| 型号： | MAX9979EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 44/60页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT MAX9979 |
| 标准包装： | 1 |
| 系列： | * |
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Dual 1.1Gbps Pin Electronics with Integrated
PMU and Level-Setting DACs
PMU Comparators
Two comparators, configured as a window comparator,
monitor the MEASV_ and MEASI_ signals (Figure 6).
Level-setting DACs IVMAX_ and IVMIN_ set the high
and low thresholds that determine the window (DAC
IVMAX_ shares duties with VHH_). Both PMU window
comparator outputs are open-drain and share a single
serial disable bit ( DISABLE_ ) that puts the outputs in a
high-impedance, low-leakage state. MEAS_ includes the
influence of VIOS, while the comparator outputs do not.
Table 11 presents the PMU comparator output logic.
PMU Measure Output (MEAS_)
The MEAS_ output presents a voltage proportional to
the measured voltage or current. Force logic input
HIZMEASP_ or bit HIZMEASS_ low to place MEAS_ in a
low-leakage, high-impedance state.
VIOS Offset Level for PMU Measure Voltage
MEAS_ Output
In MV mode, use the VIOS level-setting DAC to offset
the MEAS_ output voltage. The valid range of VIOS is 0
to 1.5V, but the VIOS DAC is programmable from
-1.25V to +3.75V. The single VIOS DAC is shared by
both channels. VIOS allows level shifting the MEAS_
output, useful when MEAS_ is read by a unipolar ADC.
The nominal 0x0000 to 0xFFFF code range for VIOS
equates to -1.25V to +3.75V. The power-on-reset and
RST state of VIOS is 0x4000, or 0V, the level for normal
operation. The MEAS_ output tracks DGS. The VIOS
DAC range is programmable outside the valid opera-
tional range of the VIOS signal, but doing so will not
harm the device. Table 23 presents the VIOS DAC
transfer function.
Table 11. PMU Comparator Output Logic
IIOS Reference Level for PMU Measure Current
MEAS_ Output
In MI mode, adjust the MEAS_ output around the I DUT_
= 0 center reference using the IIOS level-setting DAC.
IIOS is programmable from 0 to 5V, but levels outside
of the 2V to 4V range are invalid. The single IIOS DAC
is shared by both channels. IIOS allows level shifting
the ±4V MI output range to fully above ground at the
MEAS_ output, useful when MEAS_ is read by a unipo-
lar ADC. The nominal 0x0000 to 0xFFFF code range for
IIOS equates to 0 to 5V. The power-on-reset and RST
state of IIOS is 0x4000, or 1.25V. For normal operation,
the level of IIOS is 2.5V for a -1.5V to +6.5V MI MEAS_
output. The IIOS DAC range is programmable outside
the valid operational range of the IIOS signal, but doing
so will not harm the device. Table 23 presents the IIOS
DAC transfer function.
The MI MEAS_ output is a buffered version of an inter-
nal node that is used to close the force-current loop.
The sourcing range of forced current is limited for IIOS
levels above 3.5V by the V IN upper limit of approxi-
mately 7.5V.
PMU Sense
Control bit PMUSENSE_ determines which of two inputs
reaches the PMU sense amplifier (Figure 6). One input
is from DUT_ through an internal 10k Ω resistor, the
other input is from external input SENSE_. Not shown in
Figure 6 is a third input to the sense amplifier (GND),
which is used in VHH and FNMN modes to isolate and
protect the amplifier from potential overvoltage and
glitches. GND is connected automatically based on
mode setting and no discrete control is required. Table
12 presents the PMU sense control logic.
DISABLE_ BIT
CONDITION
COMPARATOR OUTPUTS
DUTHI_ DUTLO_
0
1
1
1
1
X
V MEASURE > V IVMAX and V IVMIN
V IVMAX > V MEASURE > V IVMIN
V IVMAX and V IVMIN > V MEASURE
V IVMIN > V MEASURE > V IVMAX *
High impedance
0
1
1
0
High impedance
1
1
0
0
*Normal operation is with VIVMAX > VIVMIN. This condition has VIVMIN > VIVMAX. This does not cause any problems with the
operation of the comparators.
44
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| MAX9979EVKIT+ | 功能描述:其他开发工具 MAX9979 Eval Kit RoHS:否 制造商:Parallax 产品:ELEV-8 Hex Upgrade Kits 类型:Robotics 工具用于评估:ELEV-8 Quadcopter 工作电源电压: |
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| MAX997ESA | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX997ESA+ | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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