- 您现在的位置：买卖IC网 > PDF目录2159 > MAX9939AUB+T (Maxim Integrated Products)IC AMP PGA SPI VOS I/O 10MSOP PDF资料下载
参数资料
| 型号： | MAX9939AUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/15页 |
| 文件大小： | 0K |
| 描述： | IC AMP PGA SPI VOS I/O 10MSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 可编程增益 |
| 电路数： | 2 |
| 输出类型： | 差分 |
| 转换速率： | 9 V/µs |
| 增益带宽积： | 2.15MHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 1500µV |
| 电流 - 电源： | 3.4mA |
| 电流 - 输出 / 通道： | 70mA |
| 电压 - 电源，单路/双路(±)： | 2.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
MAX9939
SPI Programmable-Gain Amplifier
with Input VOS Trim and Output Op Amp
9
Maxim Integrated
SHDN: Set SHDN to 0 for normal operation. Set SHDN
to 1 to place the device in a low-power 13A shutdown
mode. In shutdown mode, the outputs OUTA and OUTB
are high impedance, however, the SPI decode circuitry
is still active. Each instruction requires a write to the
SHDN bit.
MEAS: The MAX9939 provides a means for measuring
its own input offset voltage. When MEAS is set to 1, the
INA- input is disconnected from the input signal path
and internally shorted to INA+. This architecture thus
allows the input common-mode voltage to be compen-
sated at the application-specific input common-mode
voltage of interest. The input offset voltage of the PGA
is the output offset voltage divided by the programmed
gain without any VOS trim (i.e., V3:V0 set to 0):
VOS-INHERENT = (VOUTA - VCC/2)/Gain
Program VOS to offset VOS-INHERENT. The input VOS
also includes the effect of mismatches in the resistor-
dividers. Setting MEAS to 0 switches the inputs back to
the signals on INA+ and INA-. Each instruction requires
a write to the MEAS bit.
Programming Gain
The PGA’s gain is set by the bits G3:G0 in the Gain reg-
ister. Table 3 shows the relationship between the bits
G3:G0 and the amplifier’s gain. The slew rate and
small-signal bandwidth (SSBW) of the PGA depend on
its gain setting as shown in Table 3.
Programming Input Offset Voltage (VOS)
The input offset voltage is set by the bits V4:V0 in the
Input Offset Voltage Trim register. Bit V4 determines the
polarity of the offset. Setting V4 to 0 makes the offset
positive, while setting V4 to 1 makes the offset negative.
Table 4 shows the relationship between V3:V0 and VOS.
To determine the effect of VOS at the output of the ampli-
fier for gains other than 1, use the following formula:
VOUTA = VCC/2 + Gain x (VOS-INHERENT + VOS)
where VOS-INHERENT is the inherent input offset voltage
of the amplifier, which can be measured by setting
MEAS to 1.
Applications Information
Use of Output Amplifier as Active Filter
The output amplifier can be configured as a multiple-
feedback active filter as shown in Figure 3, which tradi-
tionally has better stopband attenuation characteristics
than Sallen-Key filters. These filters also possess inher-
ently better distortion performance since there are no
common-mode induced effects (i.e., the common-
mode voltage of the operational amplifier is always
fixed at VCC/2 instead of it being signal dependent
such as in Sallen-Key filters). Choose external resistors
and capacitors to create lowpass, bandpass, or high-
pass filters.
G3:G0
GAIN
(V/V)
SLEW RATE
(V/s)
SMALL-SIGNAL BANDWIDTH (MHz)
0000
1
2.90
2.15
0001
10
8.99
2.40
0010
20
8.70
1.95
0011
30
12.80
3.40
0100
40
12.50
2.15
0101
60
13.31
2.60
0110
80
12.15
1.91
0111
120
18.53
2.30
1000
157
16.49
1.78
0.2 (VCC = 5V)
1001
0.25 (VCC = 3.3V)
2.86
1.95
1010
1
2.90
2.15
Table 3. Gain
相关PDF资料 |
PDF描述 |
|---|---|
| MAX9943AUA+T | IC OPAMP PREC LP/HV SGL 8-MSOP |
| MAX9945AUA+T | IC OPAMP MOS-INPUT LP/LN 8-MSOP |
| MC33077P | IC OPAMP DUAL LOW NOISE 8DIP |
| MC33079PG | IC OPAMP QUAD LOW NOISE 14DIP |
| MC33178DMR2G | IC OPAMP DUAL LOW PWR/NS MICRO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9939EVKIT+ | 功能描述:放大器 IC 开发工具 MAX9939 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX993ESD | 功能描述:校验器 IC 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 |
| MAX993ESD+ | 功能描述:校验器 IC Quad 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 |
| MAX993ESD+T | 功能描述:校验器 IC Quad 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 |
| MAX993ESD-T | 功能描述:校验器 IC 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 |
发布紧急采购，3分钟左右您将得到回复。