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参数资料
| 型号： | DC1082A-A |
| 厂商： | Linear Technology |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | BOARD SAR ADC LTC1407A-1 |
| 软件下载： | QuikEval II System |
| 设计资源： | DC1082A Design File DC1082A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval-II™ |
| ADC 的数量： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 3M |
| 数据接口： | 串行，SPI? |
| 输入范围： | ±1.25 V |
| 已用 IC / 零件： | LTC1407-1 |
| 已供物品： | 板 |
| 相关产品： | LTC1407HMSE#PBF-ND - IC ADC 12BIT 3MSPS 10-MSOP LTC1407HMSE#TRPBF-ND - IC ADC 12BIT 3MSPS 10-MSOP LTC1407AHMSE#TRPBF-ND - IC ADC 14BIT 3MSPS 10-MSOP LTC1407AHMSE#PBF-ND - IC ADC 14BIT 3MSPS 10-MSOP LTC1407AIMSE#PBF-ND - IC ADC 14BIT 3MSPS 10-MSOP LTC1407AIMSE-1#PBF-ND - IC ADC 14BIT 3MSPS 10-MSOP LTC1407CMSE-1#PBF-ND - IC ADC 12BIT 3MSPS 10-MSOP LTC1407CMSE#PBF-ND - IC ADC 12BIT 3MSPS 10-MSOP LTC1407ACMSE#PBF-ND - IC ADC 14BIT 3MSPS 10-MSOP LTC1407ACMSE-1#PBF-ND - IC ADC 14BIT 3MSPS 10-MSOP 更多... |
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 |
|---|---|
| DC1082A-B | 功能描述:BOARD SAR ADC LTC1407A RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval-II™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| DC1082A-C | 功能描述:BOARD SAR ADC LTC1403A-1 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval-II™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| DC1082A-D | 功能描述:BOARD SAR ADC LTC1403A RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval-II™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| DC1082A-E | 功能描述:BOARD SAR ADC LTC2356-14 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval-II™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| DC1082A-F | 功能描述:BOARD SAR ADC LTC2355-14 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval-II™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
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