- 您现在的位置：买卖IC网 > PDF目录10501 > MAX11212BEUB+ (Maxim Integrated Products)IC ADC 18BIT SRL 13.75SPS 10UMAX PDF资料下载
参数资料
| 型号： | MAX11212BEUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/14页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT SRL 13.75SPS 10UMAX |
| 产品培训模块： | MAX11200 ADC Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 位数： | 18 |
| 采样率（每秒）： | 13.75 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 444mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，双极 |
9
Maxim Integrated
18-Bit, Single-Channel, Ultra-Low Power, Delta-
Sigma ADC with 2-Wire Serial Interface
MAX11212
Detailed Description
The MAX11212 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 indus-
try, and is optimized for applications that require very high
dynamic range with low power such as sensors on a 4mA
to 20mA industrial control loop. The MAX11212 provides
a high-accuracy internal oscillator, 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 MAX11212 pro-
vides a simple, system-friendly, 2-wire serial interface in
the space-saving, 10-pin FMAX package.
Power-On Reset (POR)
The MAX11212 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 MAX11212 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 MAX11212 accepts two analog inputs (AINP and
AINN). The modulator input range is bipolar (-VREF to
+VREF).
Internal Oscillator
The MAX11212 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 (MAX11212A) or 2.2528MHz (MAX11212B).
The internal oscillator clock is divided down to run the
digital and analog timing.
Reference
The MAX11212 provides differential inputs REFP and
REFN for an external reference voltage. Connect the
external reference directly across 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 MAX11212 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 MAX11212 communicates through a 2-wire serial
interface with a clock input and data output. The output
rate is predetermined based on the package option
(MAX11212A at 120sps and MAX11212B at 13.75sps).
2-Wire Interface
The MAX11212 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.
The RDY/DOUT is used to signal data ready, as well as
reading the data out when SCLK pulses are applied.
RDY/DOUT is high by default. The MAX11212 pulls
RDY/DOUT low when data is available at the end of
conversion, and stays low until clock pulses are applied
at SCLK input; on applying the clock pulses at SCLK,
the RDY/DOUT outputs the conversion data on every
SCLK positive edge. To monitor data availability, pull
RDY/DOUT high after reading the 18 bits of data by sup-
plying a 25th SCLK pulse.
The different operational modes using this 2-wire inter-
face are described in the following sections.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX11619EEE+ | IC ADC 10BIT SRL 300KSPS 16QSOP |
| VI-B4F-MW | CONVERTER MOD DC/DC 72V 100W |
| MAX11618EEE+ | IC ADC 10BIT SRL 300KSPS 16QSOP |
| VI-B4D-MX-F4 | CONVERTER MOD DC/DC 85V 75W |
| MS3100A20-11P | CONN RCPT 13POS WALL MNT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX11212BEUB+ | 功能描述:模数转换器 - ADC 18-Bit Delta-Sigma 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 |
| MAX11212BEUB+T | 功能描述:模数转换器 - ADC 18-Bit Delta-Sigma 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 |
| MAX11213 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:16-Bit, Single-Channel, Ultra-Low-Power, Delta-Sigma ADCs with Programmable Gain and GPIO |
| MAX11213EEE | 制造商:MAXIM 制造商全称: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. |
| MAX11213EEE+ | 功能描述:模数转换器 - ADC 16-Bit Delta-Sigma 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 |
发布紧急采购，3分钟左右您将得到回复。