- 您现在的位置：买卖IC网 > PDF目录10325 > LTC2435IGN#TRPBF (Linear Technology)IC ADC DIFF I/REF 20BIT 16-SSOP PDF资料下载
参数资料
| 型号： | LTC2435IGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 22/42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： | -40°C ~ 85°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页当前第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
29
24351fc
For more information www.linear.com/LTC2435
Figure 20. Offset Error vs Common Mode Voltage (VINCM = VIN+ = VIN–)
and Input Source Resistance Imbalance (RIN = RSOURCEIN+ – RSOURCEIN–)
for Large CIN Values (CIN ≥ 1F)
A
B
C
D
E
F
G
VINCM (V)
0
OFFSET
ERROR
(ppm)
–310
–320
–330
–340
–350
–360
–370
–380
2435 F20
2.0
5.0
1.0
3.0
4.0
0.5
2.5
1.5
3.5
4.5
VCC = 5V
VREF+ = 5V
VREF– = GND
VIN+ = VIN– = VINCM
A:
RIN = 1k
B:
RIN = 500
C:
RIN = 200
D:
RIN = 0
E:
RIN = –200
F:
RIN = –500
G:
RIN = –1k
FO = GND
TA = 25°C
CIN = 10F
applicaTions inForMaTion
input signal of 0.15 10–6 fEOSCppm. Figure 20 shows
the typical offset error due to input common mode voltage
for various values of source resistance imbalance between
the IN+ and IN– pins when large CIN values are used.
If possible, it is desirable to operate with the input signal
common mode voltage very close to the reference signal
common mode voltage as is the case in the ratiometric
measurement of a symmetric bridge. This configuration
eliminates the offset error caused by mismatched source
impedances.
Themagnitudeofthedynamicinputcurrentdependsupon
the size of the very stable internal sampling capacitors and
upon the accuracy of the converter sampling clock. The
accuracy of the internal clock over the entire temperature
and power supply range is typical better than 0.5%. Such
a specification can also be easily achieved by an external
clock.Whenrelativelystableresistors(50ppm/°C)areused
for the external source impedance seen by IN+ and IN–,
the expected drift of the dynamic current, offset and gain
errors will be insignificant (about 1% of their respective
valuesovertheentiretemperatureandvoltagerange).Even
for the most stringent applications, a one-time calibration
operation may be sufficient.
In addition to the input sampling charge, the input ESD
protection diodes have a temperature dependent leakage
current. This current, nominally 1nA (±10nA max), results
in a small offset shift. A 100Ω source resistance will create
a 0.1V typical and 1V maximum offset voltage.
Reference Current
In a similar fashion, the LTC2435/LTC2435-1 sample the
differentialreferencepinsREF+andREF–transferringsmall
amount of charge to and from the external driving circuits
thus producing a dynamic reference current. This current
does not change the converter offset, but it may degrade
the gain and INL performance. The effect of this current
can be analyzed in the same two distinct situations.
For relatively small values of the external reference capaci-
tors(CREF<0.01F),thevoltageonthesamplingcapacitor
settles almost completely and relatively large values for
the source impedance result in only small errors. Such
values for CREF will deteriorate the converter offset and
gain performance without significant benefits of reference
filtering and the user is advised to avoid them.
Larger values of reference capacitors (CREF > 0.01F) may
be required as reference filters in certain configurations.
Suchcapacitorswillaveragethereferencesamplingcharge
and the external source resistance will see a quasi con-
stant reference differential impedance. For the LTC2435,
when FO = LOW (internal oscillator and 60Hz notch), the
typical differential reference resistance is 15.6MΩ which
will generate a +FS gain error of approximately 0.032ppm
相关PDF资料 |
PDF描述 |
|---|---|
| MS27656T25B46SLC | CONN HSG RCPT 46POS WALL MT SCKT |
| LTC2435IGN#TR | IC CONV A/D 20BIT DIFF 16-SSOP |
| D38999/20FD97BN | CONN HSG RCPT 12POS WALL MT SCKT |
| LTC2430IGN#TR | IC ADC 20BIT DIFFINPUT/REF16SSOP |
| LTC1096AIS8#TR | IC ADC 8BIT SERIAL I/O 5V 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LTC2436-1CGN#PBF | 功能描述:IC ADC 2CH DIFF-IN 16BIT 16SSOP 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 |
| LTC2436-1CGN#TR | 功能描述:IC CONV A/D 16B 2CH DIFF 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 |
| LTC2436-1CGN#TRPBF | 功能描述:IC CONV A/D 16B 2CH DIFF 16SSOP 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 |
| LTC2436-1CGNPBF | 制造商:Linear Technology 功能描述:ADC 16-Bit 2-Channel Differential SSOP16 |
发布紧急采购，3分钟左右您将得到回复。