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参数资料
| 型号： | MAX191ACWG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 100KSPS 24-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 位数： | 12 |
| 采样率（每秒）： | 100k |
| 数据接口： | MICROWIRE?，并联，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 941mW |
| 电压电源： | 双 ± |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 |
MAX191
Low-Power, 12-Bit Sampling ADC
with Internal Reference and Power-Down
______________________________________________________________________________________
15
ing edge of the first clock cycle after conversion end
(when BUSY goes high). As mentioned previously, two
more read operations (after BUSY goes high) are
needed to access the conversion results. The only dif-
ference is that now the low byte can be read first. This
happens by allowing the first read operation to occur
with HBEN low, where the 8 LSBs are accessed. The
second read, with HBEN high, accesses the 4 MSBs
with 4 leading 0s.
Serial-Interface Mode
The serial mode is compatible with Microwire, SPI and
QSPI serial interfaces. In addition, a framing signal
(SSTRB) is provided that allows the devices to interface
with the TMS320 family of DSPs. Set PAR low for serial
mode. A falling edge on CS causes the T/H to sample
the input (Figure 10). Conversion always begins on the
next falling edge of SCLK, regardless of where CS
occurs. The DOUT line remains high-impedance until a
conversion begins. During the MSB decision, DOUT
remains low (leading 0), while SSTRB goes high to indi-
cate that a data frame is beginning. The data is avail-
able at DOUT on the rising edge of SCLK (SCLKOUT
when using an internal clock) and transitions on the
falling edge. DOUT remains low after all data bits have
been shifted out, inserting trailing 0s in the data stream
until CS returns high. The SCLKOUT signal is synchro-
nous with the internal or external clock.
For interface flexibility, DOUT, SCLKOUT and SSTRB
signals enter a high-impedance state when CS is high.
When CS is low, RD controls the status of SCLKOUT and
SSTRB outputs. A logic low RD enables SCLKOUT and
SSTRB, while a logic high forces both outputs into a
high-impedance state. Also, with CS low and HBEN
high, SCLKOUT drives continuously, regardless of con-
version status. This is useful with Ps that require a
continuous serial clock. If CS and HBEN are low,
SCLKOUT is output only during the conversion cycle,
while the converter internal clock runs continuously.
This is useful for creating a simple serial-to-parallel
interface without shift-register overflow (Figure 11).
Maximum Clock Rate in Serial Mode
The maximum SCLK rate depends on the minimum
setup time required at the serial data input to the P
and the ADC’s DOUT to SCLK delay (t22) (see Figure
12). The maximum fSCLK is as follows:
DOUT
SCLK
tSETUP (MIN)
t22
1
fSCLK (MAX) = ––
–––––––––
2
tSU(M) + t22
(
)
tSU(M) IS THE SETUP TIME REQUIRED AT THE SERIAL DATA INPUT TO THE P.
t22 IS THE MAXIMUM SCLK TO DOUT DELAY.
Figure 12. fSCLK(MAX) is limited by the setup time required by
the serial data input to the P.
I/O
CS
SCK
MISO
SS
SCLK
DOUT
+5V
CS
SCK
MISO
CS
SCLK
DOUT
+5V
CS
SCLK
DOUT
CS
SCLK
SSTRB
I/O
SK
SI
I/O
CLKX
CLKR
DR
FSR
MAX191
a. SPI
b. QSPI
c. MICROWIRE
d. TMS320 SERIAL INTERFACE
DOUT
SS
Figure 13. Common Serial-Interface Connections to the MAX191
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX191AENG | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX191AENG+ | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX191AEWG | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX191AEWG+ | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX191AEWG+T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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