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參數(shù)資料
| 型號： | MAX11211EEE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/27頁 |
| 文件大?。?/td> | 0K |
| 描述： | ADC 18BIT DELTA-SIGMA 16-QSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 位數(shù)： | 18 |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 667mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | * |
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Maxim Integrated
18-Bit, Single-Channel, Ultra-Low-Power, Delta-
Sigma ADCs with Programmable Gain and GPIO
MAX11209/MAX11211
Figure 8. RTD Temperature Measurement Circuit
Figure 9. Resistive Bridge Measurement Circuit
Applications Information
See Figure 8 for the RTD temperature measurement circuit
and Figure 9 for a resistive bridge measurement circuit.
Adding more active circuitry to the analog input signal
path is not always the best solution to a small-signal
problem. Sometimes, increasing the dynamic range of
an active device can lead to a simpler solution that also
helps power consumption and linearity.
Often, circuit designers immediately look for an exter-
nal op amp or programmable gain amplifier (PGA)
when confronted with coupling low-amplitude signals
to sampled digital systems. In many cases, choosing
an ADC with more dynamic range and better low-noise
performance yields a solution that works better, simpler,
and with less power.
One such example is measurements from a strain gauge
in a Wheatstone bridge configuration. Assuming a dif-
ferential output signal from the bridge in Figure 10, the
bridge’s output voltage varies from 5mV to 105mV,
while the noise of the bridge itself limits the sensitivity
to approximately 1FV. This gives approximately 100,000
discrete levels that are available for quantization, a feat
accomplished quite well with any ADC having 17 bits or
more of usable resolution. However, as it is not likely that
a 19-bit ADC will have an input range of 105mV, a gain
stage is needed to boost the signal to span the input
range of the ADC (typically between 3V and 5V).
This solution requires finding an amplifier and associated
passives that meet the overall system noise and linearity
needs. Also, the power consumed in the gain stage may
equal or surpass that of the ADC itself, a fact that is sig-
nificant in systems where power consumption is severely
constrained, such as portable sensors or 4–20mA loops.
The low-noise floor of the MAX11209 family of 16-/18-/20-
bit devices gives the designer the ability to use simple
binary shifting (digital gain) of the data word to align the
sample range with the available code space. Digital gain
is internally available in the MAX11209.
IREF2
IREF1
IREF1 = K x IREF2
REFP
REFN
RREF
AINP
AINN
GND
RRTD
MAX11209
MAX11211
REFP
AVDD
REFN
AINP
AINN
MAX11209
MAX11211
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX11212 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:18-Bit, Single-Channel, Ultra-Low Power, Delta-Sigma ADC with 2-Wire Serial Interface |
| MAX11212_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:18-Bit, Single-Channel, Ultra-Low Power, Delta-Sigma ADC with 2-Wire Serial Interface |
| MAX11212A | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:18-Bit, Single-Channel, Ultra-Low Power, Delta-Sigma ADC with 2-Wire Serial Interface |
| MAX11212AEUB | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:18-Bit, Single-Channel, Ultra-Low Power, Delta-Sigma ADC with 2-Wire Serial Interface |
| MAX11212AEUB+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit Delta-Sigma RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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