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| 型号： | MAX11647EUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/22页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT I2C 94.4KSPS 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 位数： | 10 |
| 采样率（每秒）： | 94.4k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 362mW |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 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 |
MAX11646/MAX11647
Low-Power, 1-/2-Channel, I2C, 10-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
18
______________________________________________________________________________________
SEL2
SEL1
SEL0
REFERENCE VOLTAGE
REF
INTERNAL REFERENCE STATE
00
X
VDD
Not connected
Always off
0
1
X
External reference
Reference input
Always off
1
0
Internal reference
Not connected*
Always off
1
0
1
Internal reference
Not connected*
Always on
1
0
Internal reference
Reference output
Always off
1
Internal reference
Reference output
Always on
Table 6. Reference Voltage and REF Format
X = Don’t care.
*
Preferred configuration for internal reference.
Applications Information
Power-On Reset
The configuration and setup registers (Tables 1 and 2)
default to a single-ended, unipolar, single-channel conver-
sion on AIN0 using the internal clock with VDD as the refer-
ence. The memory contents are unknown after power-up.
Automatic Shutdown
Automatic shutdown occurs between conversions when
the MAX11646/MAX11647 are idle. All analog circuits
participate in automatic shutdown except the internal
reference due to its prohibitively long wake-up time.
When operating in external clock mode, a STOP, not-
acknowledge, or repeated START condition must be
issued to place the devices in idle mode and benefit
from automatic shutdown. A STOP condition is not nec-
essary in internal clock mode to benefit from automatic
shutdown because power-down occurs once all con-
version results are written to memory (Figure 10). When
using an external reference or VDD as a reference, all
analog circuitry is inactive in shutdown and supply cur-
rent is less than 0.5A (typ). The digital conversion
results obtained in internal clock mode are maintained
in memory during shutdown and are available for
access through the serial interface at any time prior to a
STOP or a repeated START condition.
When idle, the MAX11646/MAX11647 continuously wait
for a START condition followed by their slave address
(see the
Slave Address section). Upon reading a valid
address byte the MAX11646/MAX11647 power up. The
internal reference requires 10ms to wake up, so when
using the internal reference it should be powered up
10ms prior to conversion or powered continuously.
Wake-up is invisible when using an external reference
or VDD as the reference.
Automatic shutdown results in dramatic power savings,
particularly at slow conversion rates and with internal
clock. For example, at a conversion rate of 10ksps, the
average supply current for the MAX11647 is 60A (typ)
and drops to 6A (typ) at 1ksps. At 0.1ksps the aver-
age supply current is just 1A, or a minuscule 3W of
power consumption (see Average Supply Current vs.
Conversion Rate (External Clock) in the
Typical Operating
Characteristics).
Reference Voltage
SEL[2:0] of the setup byte (Table 1) control the reference
and the REF configuration (Table 6).
Internal Reference
The internal reference is 4.096V for the MAX11646 and
2.048V for the MAX11647. When REF is configured to be
an internal reference output (SEL[2:1] = 11), decouple
REF to GND with a 0.1F capacitor and a 2k
Ω series
resistor (see the
Typical Operating Circuit). Once powered
up, the reference always remains on until reconfigured.
The internal reference requires 10ms to wake up and is
accessed using SEL0 (Table 6). When in shutdown, the
internal reference output is in a high-impedance state. The
reference should not be used to supply current for exter-
nal circuitry. The internal reference does not require an
external bypass capacitor and works best when left
unconnected (SEL1 = 0).
External Reference
The external reference can range from 1V to VDD. For
maximum conversion accuracy, the reference must be
able to deliver up to 40A and have an output imped-
ance of 500
Ω or less. If the reference has a higher out-
put impedance or is noisy, bypass it to GND as close
as possible to REF with a 0.1F capacitor.
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相关代理商/技术参数 |
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| MAX11647EWC+T | 功能描述:模数转换器 - ADC 12-Bit 2Ch 94.4ksps 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 |
| MAX1165 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Power, 16-Bit Analog-to-Digital Converters with Parallel Interface |
| MAX1165ACUI | 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 |
| MAX1165ACUI+ | 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 |
| MAX1165ACUI+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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