- 您现在的位置：买卖IC网 > PDF目录10349 > LTC1197LCMS8 (Linear Technology)IC ADC 10BIT 250KHZ W/SD 8-MSOP PDF资料下载
参数资料
| 型号： | LTC1197LCMS8 |
| 厂商： | Linear Technology |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 250KHZ W/SD 8-MSOP |
| 标准包装： | 50 |
| 位数： | 10 |
| 采样率（每秒）： | 250k |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 25mW |
| 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，单极 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第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
19
LTC1197/LTC1197L
LTC1199/LTC1199L
The effective resolution of the LTC1197/LTC1197L can be
increased by reducing the input span of the converter. The
LTC1197/LTC1197L exhibits good linearity and gain over
a wide range of reference voltages (see typical curves of
Linearity and Full-Scale Error vs Reference Voltage). How-
ever, care must be taken when operating at low values of
VREF because of the reduced LSB step size and the
resulting higher accuracy requirement placed on the con-
verter. The following factors must be considered when
operating at low VREF values.
1. Offset
2. Noise
3. Conversion speed (CLK frequency)
Offset with Reduced VREF
The offset of the LTC1197/LTC1197L has a larger effect on
the output code when the ADC is operated with reduced
reference voltage. The offset (which is typically a fixed
voltage) becomes a larger fraction of an LSB as the size of
the LSB is reduced. The typical curve of LTC1197 Offset
Error vs Reference Voltage shows how offset in LSBs is
related to reference voltage for a typical value of VOS. For
example, a VOS of 1mV which is 0.2LSB with a 5V reference
becomes 1LSB with a 1V reference and 5LSBs with a 0.2V
reference. If this offset is unacceptable, it can be corrected
digitally by the receiving system or by offsetting the “–”
input of the LTC1197/LTC1197L.
Noise with Reduced VREF
The total input referred noise of the LTC1197/LTC1197L
can be reduced to approximately 200
V peak-to-peak
using a ground plane, good bypassing, good layout tech-
niques and minimizing noise on the reference inputs. This
noise is insignificant with a 5V reference but will become
a larger fraction of an LSB as the size of the LSB is reduced.
For operation with a 5V reference, the 200
V noise is
only 0.04LSB peak-to-peak. In this case, the LTC1197/
LTC1197L noise will contribute virtually no uncertainty
to the output code. However, for reduced references, the
noise may become a significant fraction of an LSB and
cause undesirable jitter in the output code. For example,
with a 1V reference, this same 200
V noise is 0.2LSB
peak-to-peak. This will reduce the range of input volt-
ages over which a stable output code can be achieved. If
the reference is further reduced to 200mV, the 200
V of
noise becomes equal to 1LSB and a stable code may be
difficult to achieve. In this case, averaging readings may
be necessary.
This noise data was taken in a very clean setup. Any setup-
induced noise (noise or ripple on VCC, VREF or VIN) will add
to the internal noise. The lower the reference voltage to be
used, the more critical it becomes to have a clean, noise-
free setup.
Conversion Speed with Reduced VREF
With reduced reference voltages the LSB step size is
reduced and the LTC1197/LTC1197L internal comparator
overdrive is reduced. Therefore, it may be necessary to
reduce the maximum CLK frequency when low values of
VREF are used.
Input Divider
It is OK to use an input divider on the reference input of the
LTC1197/LTC1197L as long as the reference input can be
made to settle within the bit time at which the clock is
running. When using a larger value resistor divider on the
reference input, the “–” input should be matched with an
equivalent resistance.
Bypassing Reference Input with Divider
Bypassing the reference input with a divider is also pos-
sible. However, care must be taken to make sure that the
DC voltage on the reference input will not drop too much
below the intended reference voltage.
APPLICATIO S I FOR ATIO
WU
UU
相关PDF资料 |
PDF描述 |
|---|---|
| MAX9720AEBE+T | IC AMP AUDIO .05W STER AB 16UCSP |
| LTC2484CDD#TRPBF | IC ADC 24BIT 10-DFN |
| VE-J3J-IW-B1 | CONVERTER MOD DC/DC 36V 100W |
| MAX9720BEBE+T | IC AMP AUDIO .05W STER AB 16UCSP |
| MAX4364ESA/V+ | IC AMP AUDIO PWR 1.4W MONO 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1197LCMS8#PBF | 功能描述:IC ADC 10BIT 250KHZ W/SD 8-MSOP 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 |
| LTC1197LCMS8#TR | 功能描述:IC ADC 10BIT 250KHZ W/SD 8-MSOP 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 |
| LTC1197LCMS8#TRPBF | 功能描述:IC ADC 10BIT 250KHZ W/SD 8-MSOP 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 |
| LTC1197LCS8 | 功能描述:IC ADC 10BIT 250KHZ W/SD 8-SOIC 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 |
| LTC1197LCS8#PBF | 功能描述:IC ADC 10BIT 250KHZ W/SD 8-SOIC 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 |
发布紧急采购，3分钟左右您将得到回复。