- 您现在的位置：买卖IC网 > PDF目录9839 > MX574AJCWI+ (Maxim Integrated Products)IC ADC 12BIT W/REF 28-SOIC PDF资料下载
参数资料
| 型号： | MX574AJCWI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/18页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT W/REF 28-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 位数： | 12 |
| 采样率（每秒）： | 40k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 265mW |
| 电压电源： | 双 ± |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极 |
Maxim Integrated Products 8
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Pin Description (continued)
Detailed Description
Converter Operation
The MAX174/MX574A/MX674A use a successive approx-
imation technique to convert an unknown analog input to
a 12-bit digital output code. The control logic provides
easy interface to most microprocessors. Most applica-
tions require only a few external passive components to
perform the analog-to-digital (A/D) function.
The internal voltage output DAC is controlled by a suc-
cessive approximation register (SAR) and has an output
impedance of 2.5kω. The analog input is connected to
the DAC output with a 5kω resistor for the 10V input and
10kω resistor for the 20V input. The comparator is essen-
tially a zero-crossing detector, and its output is fed back
to the SAR input.
The SAR is set to half-scale as soon as a conversion starts.
The analog input is compared to 1/2 of the full-scale volt-
age. The bit is kept if the analog input is greater than half-
scale or dropped if smaller. The next bit, bit 10, is then set
with the DAC output either at 1/4 scale, if the most signifi-
cant bit (MSB) is dropped, or 3/4 scale if the MSB is kept.
The conversion continues in this manner until the least
significant bit (LSB) is tried. At the end of the conversion,
the SAR output is latched into the output buffers.
Digital Interface
CE, CS, and R/C control the operation of the MAX174/
MX574A/MX674A. While both CE and CS are asserted,
the state of R/C selects whether a conversion (R/C = 0) or
a data read (R/C = 1) is in progress. The register control
inputs, 12/8 and A0, select the data format and conver-
sion length. A0 is usually tied to the LSB of the address
bus. To perform a full 12-bit conversion, set A0 low during
a convert start. For a shorter 8-bit conversion, A0 must be
high during a convert start.
Output Data Format
During a data read, A0 also selects whether the three-
state buffers contain the 8 MSBs (A0 = 0) or the 4 LSBs
(A0 = 1) of the digital result. The 4 LSBs are followed by
4 trailing 0s.
Output data is formatted according to the 12/8 pin. If
this input is low, the output will be a word broken into
two 8-bit bytes. This allows direct interlace to 8-bit buses
without the need for external three-state buffers. If 12/8 is
high, the output will be one 12-bit word. A0 can change
state while a data-read operation is in effect.
To begin a conversion, the microprocessor must write
to the ADC address. Then, since a conversion usually
takes longer than a single clock cycle, the microproces-
sor must wait for the ADC to complete the conversion.
Valid data will be made available only at the end of the
conversion, which is indicated by STS. STS can be ether
polled or used to generate an interrupt upon completion.
Or, the microprocessor can be kept idle by inserting the
appropriate number of No Operation (NOP) instructions
between the conversion-start and data-read commands.
PIN
NAME
FUNCTION
6
CE
Chip-Enable Input. Must be high to select device.
7
VCC
+12V or +15V Supply
8
REFOUT
+10V Reference Output
9
AGND
Analog Ground
10
REFIN
Reference Input
11
VEE
-12V or -15V Supply
12
BIPOFF
Bipolar Offset Input. Connect to REFOUT for bipolar input range.
13
10VIN
10V Span Input
14
20VIN
20V Span Input
15
DGND
Digital Ground
16–27
D0–D11
Three-State Data Outputs
28
STS
Status Output
相关PDF资料 |
PDF描述 |
|---|---|
| V48C12M150BG | CONVERTER MOD DC/DC 12V 150W |
| MS27474T8F6P | CONN RCPT 6POS JAM NUT W/PINS |
| MAX1187CEUI+ | IC ADC 16BIT 135KSPS 28-TSSOP |
| MS27484T20A35S | CONN PLUG 79POS STRAIGHT W/SCKT |
| MS27656E13A22P | CONN RCPT 22POS WALL MNT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MX574AJCWI+ | 功能描述:模数转换器 - ADC 12-Bit Precision 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 |
| MX574AJCWI+T | 功能描述:模数转换器 - ADC 12-Bit Precision 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 |
| MX574AJCWI-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 |
| MX574AJD | 功能描述:模数转换器 - ADC 12-Bit Precision 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 |
| MX574AJEPI | 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 |
发布紧急采购，3分钟左右您将得到回复。