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參數資料
| 型號： | MAX11208AEUB+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 14/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 19BIT SRL 120SPS 10UMAX |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 位數： | 19 |
| 采樣率（每秒）： | 120 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 444mW |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-µMAX |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 1 個差分，雙極 |
________________________________________________________________________________________ _ 9
MAX11208
20-Bit, Single-Channel, Ultra-Low-Power,
Delta-Sigma ADC with 2-Wire Serial Interface
Detailed Description
The MAX11208 is an ultra-low-power (< 240FA active),
high-resolution, low-speed, serial-output ADC. This
device provides the highest resolution per unit power in
the industry and is optimized for applications that require
very high dynamic range with low power, such as sen-
sors on a 4mA to 20mA industrial control loop.
The MAX11208 provides a high-accuracy internal oscil-
lator, which requires no external components. When
used with the specified data rates, the internal digital
filter provides more than 80dB rejection of 50Hz or 60Hz
line noise. The MAX11208 provides a simple, system-
friendly, 2-wire serial interface in the space-saving,
10-pin FMAX package.
Power-On Reset (POR)
The MAX11208 utilizes power-on reset (POR) supply-
monitoring circuitry on both the digital supply (DVDD)
and the analog supply (AVDD). The POR circuitry
ensures proper device default conditions after either a
digital or analog power-sequencing event.
The MAX11208 performs a self-calibration operation as
part of the startup initialization sequence whenever a
digital POR is triggered. It is important to have a stable
reference voltage available at the REFP and REFN pins
to ensure an accurate calibration cycle. If the reference
voltage is not stable during a POR event, the part should
be calibrated once the reference has stabilized. The part
can be programmed for calibration by using 26 SCLKs
as shown in Figure 3.
The digital POR trigger threshold is approximately 1.2V
and has 100mV of hysteresis. The analog POR trigger
threshold is approximately 1.25V and has 100mV of hys-
teresis. Both POR circuits have lowpass filters that pre-
vent high-frequency supply glitches from triggering the
POR. The analog supply (AVDD) and the digital supply
(DVDD) pins should be bypassed using 0.1FF capaci-
tors placed as close as possible to the package pin.
Analog Inputs
The MAX11208 accepts two analog inputs (AINP and
AINN). The modulator input range is bipolar (-VREF to
+VREF).
Internal Oscillator
The MAX11208 incorporates a highly stable internal
oscillator that provides the system clock. The system
clock runs the internal state machine and is trimmed to
2.4576MHz (MAX11208A) or 2.2528MHz (MAX11208B).
The internal oscillator clock is divided down to run the
digital and analog timing.
Reference
The MAX11208 provides differential inputs REFP and
REFN, for an external reference voltage. Connect the
external reference directly across the REFP and REFN
to obtain the differential reference voltage. The common-
mode voltage range for VREFP and VREFN is between 0
and VAVDD. The differential voltage range for REFP and
REFN is 1V to VAVDD.
Digital Filter
The MAX11208 contains an on-chip, digital lowpass filter
that processes the 1-bit data stream from the modulator
using a SINC4 (sinx/x)4 response. When the device is
operating in single-cycle conversion mode, the filter is
reset at the end of the conversion cycle. When operat-
ing in continuous conversion latent mode, the filter is not
reset. The SINC4 filter has a -3dB frequency equal to
24% of the data rate.
Serial-Digital Interface
The MAX11208 communicates through a 2-wire serial
interface with a clock input and data output. The output
rate is predetermined based on the package option
(MAX11208A at 120sps and MAX11208B at 13.75sps).
2-Wire Interface
The MAX11208 is compatible with the 2-wire interface
and uses SCLK and RDY/DOUT for serial communica-
tions. In this mode, all controls are implemented by tim-
ing the high or low phase of the SCLK. The 2-wire serial
interface only allows for data to be read out through the
RDY/DOUT output. Supply the serial clock to SCLK to
shift the conversion data out.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX11208BEUB+ | 功能描述:模數轉換器 - ADC 20-Bit Delta-Sigma RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| MAX11208BEUB+T | 功能描述:模數轉換器 - ADC 20-Bit Delta-Sigma RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| MAX11209 | 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 ADCs with Programmable Gain and GPIO |
| MAX11209EEE | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:The MAX11200, MAX11206, MAX11209, MAX11210, and MAX11213 evaluation kits (EV kits) consist of one MAX11200, MAX11206, MAX11209, MAX11210, or MAX11213 evaluation board and software. |
| MAX11209EEE+ | 功能描述:模數轉換器 - ADC 18-Bit Delta-Sigma RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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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