参数资料
| 型号： | LTC2498IUHF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/38页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT 16CH 38-QFN |
| 标准包装： | 2,500 |
| 位数： | 24 |
| 采样率（每秒）： | 7.5 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 16 个单端，双极；8 个差分，双极 |
| 配用： | DC1011A-A-ND - BOARD DELTA SIGMA ADC LTC2498 |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
LTC2498
16
2498ff
applications inForMation
SERIAL INTERFACE PINS
The LTC2498 transmits the conversion result, reads the
input configuration, and receives a start of conversion
command through a synchronous 3- or 4-wire interface.
During the conversion and sleep states, this interface
can be used to access the converter status. During the
data output state, it is used to read the conversion result,
program the input channel, rejection frequency, speed
multiplier, and select the temperature sensor.
Serial Clock Input/Output (SCK)
The serial clock pin (SCK) is used to synchronize the data
input/output transfer. Each bit is shifted out of the SDO
pin on the falling edge of SCK and data is shifted into the
SDI pin on the rising edge of SCK.
The serial clock pin (SCK) can be configured as either a
master (SCK is an output generated internally) or a slave
(SCK is an input and applied externally). Master mode
(internal SCK) is selected by simply floating the SCK pin.
Slavemode(externalSCK)isselectedbydrivingSCKLOW
during power-up and each falling edge of CS. Specific
details of these SCK modes are described in the Serial
Interface Timing Modes section.
Serial Data Output (SDO)
The serial data output pin (SDO) provides the result of the
last conversion as a serial bit stream (MSB first) during
the data output state. In addition, the SDO pin is used as
an end of conversion indicator during the conversion and
sleep states.
When CS is HIGH, the SDO driver is switched to a high
impedance state in order to share the data output line with
other devices. If CS is brought LOW during the conversion
phase, the EOC bit (SDO pin) will be driven HIGH. Once
the conversion is complete, if CS is brought LOW, EOC
will be driven LOW indicating the conversion is complete
and the result is ready to be shifted out of the device.
Chip Select (CS)
The active low CS pin is used to test the conversion status,
enable I/O data transfer, initiate a new conversion, control
the duration of the sleep state, and set the SCK mode.
At the conclusion of a conversion cycle, while CS is HIGH,
the device remains in a low power sleep state where the
supply current is reduced several orders of magnitude. In
order to exit the sleep state and enter the data output state,
CS must be pulled LOW. Data is now shifted out the SDO
pin under control of the SCK pin as described previously.
A new conversion cycle is initiated either at the conclusion
of the data output cycle (all 32 data bits read) or by pulling
CS HIGH any time between the first and 32nd rising edges
of the serial clock (SCK). In this case, the data output is
aborted and a new conversion begins.
Serial Data Input (SDI)
The serial data input (SDI) is used to select the input
channel, rejection frequency, speed multiplier and to ac-
cess the integrated temperature sensor. Data is shifted
into the device during the data output/input state on the
rising edge of SCK while CS is LOW.
OUTPUT DATA FORMAT
The LTC2498 serial output stream is 32 bits long. The
first bit indicates the conversion status, the second bit is
always zero, and the third bit conveys sign information.
The next 24 bits are the conversion result, MSB first. The
remaining 5 bits are sub LSBs beyond the 24-bit level
that may be included in averaging or discarded without
loss of resolution.
Bit 31 (first output bit) is the end of conversion (EOC)
indicator. This bit is available on the SDO pin during the
conversion and sleep states whenever CS is LOW. This
bit is HIGH during the conversion cycle, goes LOW once
the conversion is complete, and is Hi-Z when CS is HIGH.
Bit 30 (second output bit) is a dummy bit (DMY) and is
always LOW.
Bit 29 (third output bit) is the conversion result sign
indicator (SIG). If the selected input (VIN = IN+ – IN–) is
greater than 0V, this bit is HIGH. If VIN < 0, this bit is LOW.
Bit 28 (fourth output bit) is the most significant bit (MSB)
of the result. This bit in conjunction with Bit 29 also pro-
vides underrange and overrange indication. If both Bit 29
and Bit 28 are HIGH, the differential input voltage is above
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2600IUFD#PBF | IC DAC OCTAL R-R 16BIT 20-QFN |
| LTC2602IMS8#TRPBF | IC DAC 16BIT DUAL R-R VOUT 8MSOP |
| LTC2604IGN-1#TRPBF | IC DAC 16BIT QUAD R-R OUT 16SSOP |
| LTC2605IGN-1#TRPBF | IC DAC 16BIT OCT I2C 16-SSOP |
| LTC2606IDD#TRPBF | IC DAC 16BIT I2C V-OUT 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2499CUHF | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 38-Pin QFN EP |
| LTC2499CUHF#PBF | 功能描述:IC ADC 24BIT DELTA SIG 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| LTC2499CUHF#TRPBF | 功能描述:IC ADC 24BIT DELTA SIG 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 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:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2499CUHFPBF | 制造商:Linear Technology 功能描述:24bit Delta Sigma ADC Temp Sens LTC2499 |
| LTC2499IUHF#PBF | 功能描述:IC ADC 24BIT DELTA SIG 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
发布紧急采购，3分钟左右您将得到回复。