参数资料
| 型号： | LTC2483IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/34页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT I2C 10-DFN |
| 标准包装： | 2,500 |
| 位数： | 16 |
| 采样率（每秒）： | 6.8 |
| 数据接口： | I²C，串行 |
| 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： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，双极 |
| 配用： | DC955A-ND - BOARD DELTA SIGMA ADC LTC2483 |
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LTC2483
2483fc
In addition to this gain error, the converter INL per-
formance is degraded by the reference source imped-
ance. The INL is caused by the input dependent terms
–VIN2/(VREF REQ) – (0.5 VREF DT)/REQ in the reference
pin current as expressed in Figure 7. When using internal
oscillator, every 100Ω of reference source resistance
translates into about 0.61ppm additional INL error. When
CA0/F0 is driven by an external oscillator with a frequency
fEOSC, every 100Ω of source resistance driving REF+ or
REF– translates into about 2.18 10–6 fEOSCppm ad-
ditional INL error. Figure 15 shows the typical INL error
due to the source resistance driving the REF+ or REF– pins
when large CREF values are used. The user is advised to
minimize the source impedance driving the REF+ and
REF– pins.
In applications where the reference and input common
mode voltages are different, extra errors are introduced.
For every 1V of the reference and input common mode
voltage difference (VREFCM – VINCM) and a 5V reference,
each ohm of reference source resistance introduces an
extra (VREFCM – VINCM)/(VREF REQ) full-scale gain error,
which is 0.067ppm when using internal oscillator. If an
applicaTions inFormaTion
external clock is used, the corresponding extra gain error
is 0.24 10–6 fEOSCppm.
The magnitude of the dynamic reference current depends
uponthesizeoftheverystableinternalsamplingcapacitors
andupontheaccuracyoftheconvertersamplingclock.The
accuracy of the internal clock over the entire temperature
andpowersupplyrangeistypicallybetterthan0.5%.Such
a specification can also be easily achieved by an external
clock. When relatively stable resistors (50ppm/°C) are
used for the external source impedance seen by REF+
and REF–, the expected drift of the dynamic current gain
error will be insignificant (about 1% of its value over the
entire temperature and voltage range). Even for the most
stringent applications a one-time calibration operation
may be sufficient.
In addition to the reference sampling charge, the refer-
ence pins ESD protection diodes have a temperature de-
pendent leakage current. This leakage current, nominally
1nA (±10nA max), results in a small gain error. A 100Ω
source resistance will create a 0.05V typical and 0.5V
maximum full-scale error.
Figure 15. INL vs Differential Input Voltage and
Reference Source Resistance for CREF > 1F
VIN/VREF (V)
–0.5
INL
(ppm
OF
V
REF
)
2
6
10
0.3
2483 F15
–2
–6
0
4
8
–4
–8
–10
–0.3
–0.1
0.1
0.5
VCC = 5V
VREF = 5V
VIN(CM) = 2.5V
TA = 25°C
CREF = 10F
R = 1k
R = 100
R = 500
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相关代理商/技术参数 |
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| LTC2484CDD | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 10-Pin DFN EP |
| LTC2484CDD#PBF | 功能描述:IC ADC 24BIT 10-DFN 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 |
| LTC2484CDD#TR | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 10-Pin DFN EP T/R |
| LTC2484CDD#TRPBF | 功能描述:IC ADC 24BIT 10-DFN 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 |
| LTC2484IDD | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 10-Pin DFN EP |
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