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| 型号： | MAX1403EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/36页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX1403 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 480 |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/增益 |
| 在以下条件下的电源（标准）： | 16.9mW @ 480SPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX1403 |
| 已供物品： | 板，CD |
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MAX1403
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
______________________________________________________________________________________
13
_______________Detailed Description
Circuit Description
The MAX1403 is a low-power, multichannel, serial-output,
sigma-delta ADC designed for applications with a wide
dynamic range, such as weigh scales and pressure
transducers. The functional block diagram in Figure 2
contains a switching network, a modulator, a PGA, two
buffers, an oscillator, an on-chip digital filter, two
matched transducer excitation current sources, and a
bidirectional serial communications port.
Three fully differential input channels feed into the
switching network. Each channel may be independent-
ly programmed with a gain between +1V/V and
+128V/V. These three differential channels may also be
configured to operate as five pseudo-differential input
channels. Two additional, fully differential system-cali-
bration channels allow system gain and offset error to
be measured. These system-calibration channels can
be used as additional differential signal channels when
dedicated gain and offset error correction channels are
not required.
Two chopper-stabilized buffers are available to isolate
the selected inputs from the capacitive loading of the
PGA and modulator. Three independent DACs provide
compensation for the DC component of the input signal
on each of the differential input channels.
The sigma-delta modulator converts the input signal into
a digital pulse train whose average duty cycle represents
the digitized signal information. The pulse train is then
processed by a digital decimation filter, resulting in a
conversion accuracy exceeding 16 bits. The digital filter’s
decimation factor is user-selectable, which allows the
conversion result’s resolution to be reduced to achieve a
higher output data rate. When used with 2.4576MHz or
1.024MHz master clocks, the decimation filter can be
programmed to produce zeros in its frequency response
at the line frequency and associated harmonics. This
ensures excellent line rejection without the need for fur-
ther postfiltering. In addition, the modulator sampling
frequency can be optimized for either lowest power dis-
sipation or highest output data rate.
AGND
V+
DGND
VDD
CALOFF+
OUT2
OUT1
CALGAIN+
CALOFF-
CALGAIN-
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
SWITCHING
NETWORK
MODULATOR
DAC
PGA
V+
BUFFER
AGND
V+
DIGITAL
FILTER
SCLK
DIN
DOUT
INT
CS
DS0
DS1
RESET
CLKIN
CLKOUT
REFIN+
REFIN-
DIVIDER
MAX1403
INTERFACE
AND CONTROL
CLOCK
GEN
Figure 2. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1403EVL11 | 功能描述:数据转换 IC 开发工具 MAX1403 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MAX1403EVSYSTEM | 制造商:Maxim Integrated Products 功能描述:EVALUATION SYSTEM FOR THE MAX1403 - Boxed Product (Development Kits) |
| MAX1406C/D | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX1406CAE | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX1406CAE+ | 功能描述:RS-232接口集成电路 15kV ESD-Protected 230kbps RS-232 LD/Rc RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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