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参数资料
| 型号： | MAX1191ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/27页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT 7.5MSPS DUAL 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 位数： | 8 |
| 采样率（每秒）： | 7.5M |
| 数据接口： | 并联 |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，双极；2 个差分，双极 |
| 产品目录页面： | 1396 (CN2011-ZH PDF) |
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MAX1191
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
18
______________________________________________________________________________________
heavy capacitive loads. To improve the dynamic perfor-
mance of the MAX1191, add 100
resistors in series
with the digital outputs close to the MAX1191. Refer to
the MAX1193 Evaluation Kit schematic for an example
of the digital outputs driving a digital buffer through
100
series resistors.
Power Modes (PD0, PD1)
The MAX1191 has four power modes that are con-
trolled with PD0 and PD1. Four power modes allow the
MAX1191 to efficiently use power by transitioning to a
low-power state when conversions are not required
(Table 3).
Shutdown mode offers the most dramatic power sav-
ings by shutting down all the analog sections of the
MAX1191 and placing the outputs in tri-state. The
wake-up time from shutdown mode is dominated by the
time required to charge the capacitors at REFP, REFN,
and COM. In internal reference mode and buffered
external reference mode, the wake-up time is typically
20s. When operating in the unbuffered external refer-
ence mode, the wake-up time is dependent on the
external reference drivers. When the outputs transition
from tri-state to on, the last converted word is placed
on the digital outputs.
In standby mode, the reference and clock distribution
circuits are powered up, but the pipeline ADCs are
unpowered and the outputs are in tri-state. The wake-
up time from standby mode is dominated by the 5.5s
required to activate the pipeline ADCs. When the out-
puts transition from tri-state to on, the last converted
word is placed on the digital outputs.
DIFFERENTIAL INPUT VOLTAGE
(IN+ - IN-)
DIFFERENTIAL INPUT
(LSB)
OFFSET BINARY
(D7–D0)
OUTPUT DECIMAL CODE
+127
(+ full scale – 1 LSB)
1111 1111
255
+126
(+ full scale – 2 LSB)
1111 1110
254
+1
1000 0001
129
0 (bipolar zero)
1000 0000
128
-1
0111 1111
127
-127
(- full scale + 1 LSB)
0000 0001
1
-128 (- full scale)
0000 0000
0
VREF ×
127
128
VREF ×
126
128
VREF ×
1
128
VREF ×
0
128
-VREF ×
1
128
-VREF ×
127
128
-VREF ×
128
Table 2. Output Codes vs. Input Voltage
PD0
PD1
POWER MODE
ADC
INTERNAL
REFERENCE
CLOCK DISTRIBUTION
OUTPUTS
0
Shutdown
Off
Tri-state
0
1
Standby
Off
On
Tri-state
1
0
Idle
On
Tri-state
1
Normal operating
On
Table 3. Power Logic
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| MAX1191ETI+ | 功能描述:模数转换器 - ADC 8-Bit 2Ch 7.5Msps 3.6V Precision 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 |
| MAX1191ETI+T | 功能描述:模数转换器 - ADC 8-Bit 2Ch 7.5Msps 3.6V Precision 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 |
| MAX1191ETI-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 |
| MAX1192ETI | 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 |
| MAX1192ETI+ | 功能描述:模数转换器 - ADC 8-Bit 2Ch 22Msps 3.6V Precision 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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