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参数资料
| 型号： | MAX1085BCSA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/16页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 300KSPS 8-SOIC |
| 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）： | 300k |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 471mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极 |
MAX1084/MAX1085
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
8
_______________________________________________________________________________________
_______________Detailed Description
Converter Operation
The MAX1084/MAX1085 use an input track/hold (T/H)
and successive-approximation register (SAR) circuitry to
convert an analog input signal to a digital 10-bit output.
Figure 3 shows the MAX1084/MAX1085 in their simplest
configuration. The internal reference is trimmed to 2.5V.
The serial interface requires only three digital lines
(SCLK, CS, and DOUT) and provides an easy interface to
microprocessors (Ps).
The MAX1084/MAX1085 have two modes: normal and
shutdown. Pulling SHDN low shuts the device down and
reduces supply current to 2A (typ); pulling SHDN high
puts the device into operational mode. Pulling CS low ini-
tiates a conversion that is driven by SCLK. The conver-
sion result is available at DOUT in unipolar serial format.
The serial data stream consists of three zeros, followed
by the data bits (MSB first). All transitions on DOUT
occur 20ns after the rising edge of SCLK. Figures 8 and
9 show the interface timing information.
Analog Input
Figure 4 shows the sampling architecture of the ADC’s
comparator. The full-scale input voltage is set by the
internal reference (VREF = +2.5V).
Track/Hold
In track mode, the analog signal is acquired and stored
in the internal hold capacitor. In hold mode, the T/H
switch opens and maintains a constant input to the
ADC’s SAR section.
During acquisition, the analog input AIN charges
capacitor CHOLD. Bringing CS low ends the acquisition
interval. At this instant, the T/H switches the input side
of CHOLD to GND. The retained charge on CHOLD repre-
sents a sample of the input, unbalancing node ZERO at
the comparator’s input.
In hold mode, the capacitive digital-to-analog converter
(DAC) adjusts during the remainder of the conversion
cycle to restore node ZERO to 0 within the limits of 10-
bit resolution. This action is equivalent to transferring a
charge from CHOLD to the binary-weighted capacitive
DOUT
6k
DGND
CLOAD = 20pF
6k
DGND
VDD
b) HIGH-Z TO VOL AND VOH TO VOL
a) HIGH-Z TO VOH AND VOL TO VOH
DOUT
6k
DGND
CLOAD = 20pF
6k
DGND
VDD
b) VOLTO HIGH-Z
a) VOH TO HIGH-Z
Figure 1. Load Circuits for DOUT Enable Time
Figure 2. Load Circuits for DOUT Disable Time
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1085BESA | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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 |
| MAX1085BESA+ | 功能描述:模数转换器 - ADC 300/400ksps Sgl-Sply 4Ch Serial 10Bit 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 |
| MAX1085BESA+T | 功能描述:模数转换器 - ADC 300/400ksps Sgl-Sply 4Ch Serial 10Bit 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 |
| MAX1085BESA-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 |
| MAX1086 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:150ksps, 10-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs in SOT23 |
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