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参数资料
| 型号： | LTC1407AIMSE |
| 厂商： | Linear Technology |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 3MSPS SAMPLE 10MSOP |
| 标准包装： | 50 |
| 位数： | 14 |
| 采样率（每秒）： | 3M |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 14mW |
| 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-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，单极；2 个差分，单极 |
| 配用： | DC1082A-B-ND - BOARD SAR ADC LTC1407A DC1082A-A-ND - BOARD SAR ADC LTC1407A-1 |
LTC1407/LTC1407A
13
1407fb
APPLICATIONS INFORMATION
INPUT RANGE
The analog inputs of the LTC1407/LTC1407A may be driven
fully differentially with a single supply. Either input may
swing up to 3V, provided the differential swing is no greater
than 2.5V. In the valid input range, the noninverting input
of each channel should always be more positive than the
inverting input of each channel. The 0V to 2.5V range is
also ideally suited for single-ended input use with single
supply applications. The common mode range of the
inputs extend from ground to the supply voltage VDD. If
the difference between the CH0+ and CH0– inputs or the
CH1+ and CH1– inputs exceeds 2.5V, the output code will
stay xed at all ones, and if this difference goes below 0V,
the ouput code will stay xed at all zeros.
INTERNAL REFERENCE
The LTC1407/LTC1407A have an on-chip, temperature
compensated, bandgap reference that is factory trimmed
near 2.5V to obtain a precise 2.5V input span. The refer-
ence amplier output VREF, (Pin 3) must be bypassed with
a capacitor to ground. The reference amplier is stable
with capacitors of 1μF or greater. For the best noise per-
formance, a 10μF ceramic or a 10μF tantalum in parallel
with a 0.1μF ceramic is recommended. The VREF pin can be
overdriven with an external reference as shown in Figure 2.
The voltage of the external reference must be higher than
the 2.5V of the open-drain P-channel output of the internal
reference. The recommended range for an external refer-
ence is 2.55V to VDD. An external reference at 2.55V will
see a DC quiescent load of 0.75mA and as much as 3mA
during conversion.
INPUT SPAN VERSUS REFERENCE VOLTAGE
The differential input range has a unipolar voltage span that
equals the difference between the voltage at the reference
buffer output VREF (Pin 3) and the voltage at the Exposed
Pad ground. The differential input range of ADC is 0V to
2.5V when using the internal reference. The internal ADC
is referenced to these two nodes. This relationship also
holds true with an external reference.
DIFFERENTIAL INPUTS
The ADC will always convert the unipolar difference of
CH0+ minus CH0– or the unipolar difference of CH1+ mi-
nus CH1–, independent of the common mode voltage at
either set of inputs. The common mode rejection holds up
at high frequencies (see Figure 3.) The only requirement
is that both inputs not go below ground or exceed VDD.
Figure 2
Figure 3. CMRR vs Frequency
LTC1407/
LTC1407A
VREF
GND
1407 F02
3
11
10μF
3V REF
FREQUENCY (Hz)
–80
CMRR
(dB)
–40
0
–100
–60
–20
100
1k
1407 G08
–120
10k
100k
1M
10M
100M
CH0
CH1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1407AIMSE#PBF | 功能描述:IC ADC 14BIT 3MSPS 10-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: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 |
| LTC1407AIMSE#TR | 功能描述:IC ADC 14BIT 3MSPS SAMPLE 10MSOP 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:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 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:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| LTC1407AIMSE#TRPBF | 功能描述:IC ADC 14BIT 3MSPS SAMPLE 10MSOP 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:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 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:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| LTC1407AIMSE-1 | 功能描述:IC ADC 14BIT 3MSPS SAMPLE 10MSOP 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:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 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:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| LTC1407AIMSE-1#PBF | 功能描述:IC ADC 14BIT 3MSPS 10-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: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 |
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