- 您现在的位置：买卖IC网 > PDF目录2006 > LTC2435CGN#TRPBF (Linear Technology)IC ADC DIFF I/REF 20BIT 16-SSOP PDF资料下载
参数资料
| 型号： | LTC2435CGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/42页 |
| 文件大小： | 0K |
| 描述： | IC ADC DIFF I/REF 20BIT 16-SSOP |
| 标准包装： | 2,500 |
| 位数： | 20 |
| 采样率（每秒）： | 15 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 1mW |
| 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： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，双极 |
第1页第2页第3页第4页第5页当前第6页第7页第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页第39页第40页第41页第42页
LTC2435/LTC2435-1
14
24351fc
For more information www.linear.com/LTC2435
applicaTions inForMaTion
Output Data Format
The LTC2435/LTC2435-1 serial output data stream is 24
bits long. The first 3 bits represent status information
indicating the sign and conversion state. The next 21
bits are the conversion result, MSB first. The third and
fourth bit together are also used to indicate an underrange
condition (the differential input voltage is below –FS) or
an overrange condition (the differential input voltage is
above +FS).
Bit 23 (first output bit) is the end of conversion (EOC)
indicator. This bit is available at the SDO pin during the
conversion and sleep states whenever the CS pin is LOW.
This bit is HIGH during the conversion and goes LOW
when the conversion is complete.
Bit 22 (second output bit) is a dummy bit (DMY) and is
always LOW.
Bit 21 (third output bit) is the conversion result sign
indicator (SIG). If VIN is >0, this bit is HIGH. If VIN is <0,
this bit is LOW.
Bit 20 (fourth output bit) is the most significant bit (MSB)
of the result. This bit in conjunction with Bit 21 also pro-
vides the underrange or overrange indication. If both Bit
21 and Bit 20 are HIGH, the differential input voltage is
above +FS. If both are LOW, the differential input voltage
is below –FS.
The function of these bits is summarized in Table 1.
Table 1. LTC2435/LTC2435-1 Status Bits
Input Range
Bit 23
EOC
Bit 22
DMY
Bit 21
SIG
Bit 20
MSB
VIN ≥ 0.5 VREF
0
1
0V ≤ VIN < 0.5 VREF
0
1
0
–0.5 VREF ≤ VIN < 0V
0
1
VIN < –0.5 VREF
0
Bits 20-0 are the 21-bit conversion result MSB first.
Bit 0 is the least significant bit (LSB).
Data is shifted out of the SDO pin under control of the
serial clock (SCK), see Figure 3. Whenever CS is HIGH,
SDO remains high impedance and any externally gener-
ated SCK clock pulses are ignored by the internal data
out shift register.
In order to shift the conversion result out of the device,
CS must first be driven LOW. EOC is seen at the SDO pin
of the device once CS is pulled LOW. EOC changes real
time from HIGH to LOW at the completion of a conversion.
This signal may be used as an interrupt for an external
microcontroller. Bit 23 (EOC) can be captured on the first
rising edge of SCK. Bit 22 is shifted out of the device on
the first falling edge of SCK. The final data bit (Bit 0) is
shifted out on the falling edge of the 23rd SCK and may
be latched on the rising edge of the 24th SCK pulse. On
the falling edge of the 24th SCK pulse, SDO goes HIGH
indicating the initiation of a new conversion cycle. This
bit serves as EOC (Bit 23) for the next conversion cycle.
Table 2 summarizes the output data format.
As long as the voltage on the IN+ and IN– pins is main-
tained within the –0.3V to (VCC+0.3V)absolutemaximum
operating range, a conversion result is generated for any
differential input voltage VIN from –FS = –0.5 VREF to
+FS = 0.5 VREF . For differential input voltages greater
than +FS, the conversion result is clamped to the value
corresponding to the +FS. For differential input voltages
below –FS, the conversion result is clamped to the value
corresponding to –FS – 1LSB.
Offset Accuracy and Drift
Unlike the LTC2430 and most of the LTC2400 family, the
LTC2435/LTC2435-1 do not perform an offset calibration
every cycle. The reason for this is to increase the data
output rate while maintaining line frequency rejection.
WhiletheinitialaccuracyoftheLTC2435/LTC2435-1offset
is within 5mV (see Figure 4), several unique properties
of the LTC2435/LTC2435-1 architecture nearly eliminate
the drift of the offset error with respect to temperature
and supply.
As shown in Figure 5, the offset variation with temperature
is less than 3ppm over the complete temperature range of
–50°C to 100°C. This corresponds to a temperature drift
of 0.022ppm/°C.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2442IG#PBF | IC ADC 24BIT 4CH 36-SSOP |
| LTC2446IUHF#TRPBF | IC ADC 24BIT 8CH HI SPEED 38QFN |
| LTC2448IUHF#TRPBF | IC ADC 24BIT HI SPEED 38QFN |
| LTC2451ITS8#TRPBF | IC ADC 16BIT DELTA SIG TSOT23-8 |
| LTC2452ITS8#TRPBF | IC ADC 16BIT DELTA SIG TSOT23-8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2435IGN | 功能描述:IC CONV A/D 20BIT DIFF 16-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2435IGN#PBF | 功能描述:IC ADC DIFF I/REF 20BIT 16-SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2435IGN#TR | 功能描述:IC CONV A/D 20BIT DIFF 16-SSOP RoHS:否 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 |
| LTC2435IGN#TRPBF | 功能描述:IC ADC DIFF I/REF 20BIT 16-SSOP 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 |
| LTC2436-1CGN | 功能描述:IC ADC 2CH DIFF-IN 16BIT 16SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
发布紧急采购，3分钟左右您将得到回复。