- 您现在的位置：买卖IC网 > PDF目录10280 > AD7682BCPZRL7 (Analog Devices Inc)IC ADC 16BIT 4CH 250KSPS 20LFCSP PDF资料下载
参数资料
| 型号： | AD7682BCPZRL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 4CH 250KSPS 20LFCSP |
| 产品培训模块： | Power Line Monitoring |
| 产品变化通告： | Startup Circuitry Design Improvement Change 15/April/2009 |
| 标准包装： | 1,500 |
| 系列： | PulSAR® |
| 位数： | 16 |
| 采样率（每秒）： | 250k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 21mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-VQ |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极；4 个差分，双极；4 个伪差分，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页第29页第30页第31页第32页
Data Sheet
AD7682/AD7689
Rev. D | Page 19 of 32
Unipolar or Bipolar
Figure 26 shows an example of the recommended connection
available.
Bipolar Single Supply
Figure 27 shows an example of a system with a bipolar input
using single supplies with the internal reference (optional
different VIO supply). This circuit is also useful when the
amplifier/signal conditioning circuit is remotely located with
some common mode present. Note that for any input config-
uration, the INx inputs are unipolar and are always referenced
to GND (no negative voltages even in bipolar range).
For this circuit, a rail-to-rail input/output amplifier can be used;
however, the offset voltage vs. input common-mode range should
be noted and taken into consideration (1 LSB = 62.5 μV with
VREF = 4.096 V). Note that the conversion results are in twos
complement format when using the bipolar input configuration.
Refer to the AN-581 Application Note, Biasing and Decoupling
Op Amps in Single Supply Applications, for additional details
about using single-supply amplifiers.
ANALOG INPUTS
Input Structure
Figure 28 shows an equivalent circuit of the input structure of
protection for the analog inputs, IN[7:0] and COM. Care must
be taken to ensure that the analog input signal does not exceed
the supply rails by more than 0.3 V because this causes the
diodes to become forward biased and to start conducting
current.
These diodes can handle a forward-biased current of 130 mA
maximum. For instance, these conditions may eventually occur
when the input buffer supplies are different from VDD. In such
a case, for example, an input buffer with a short circuit, the
current limitation can be used to protect the part.
CIN
RIN
D1
D2
CPIN
INx+
OR INx–
OR COM
GND
VDD
07
35
3-
0
3
0
Figure 28. Equivalent Analog Input Circuit
This analog input structure allows the sampling of the true
differential signal between INx+ and COM or INx+ and INx.
(COM or INx = GND ± 0.1 V or VREF ± 0.1 V). By using these
differential inputs, signals common to both inputs are rejected,
as shown in Figure 29.
70
65
60
55
50
45
40
35
30
1
10k
10
CM
RR
(
d
B)
100
1k
FREQUENCY (kHz)
07
35
3-
03
1
Figure 29. Analog Input CMRR vs. Frequency
During the acquisition phase, the impedance of the analog inputs
can be modeled as a parallel combination of the capacitor, CPIN,
and the network formed by the series connection of RIN and CIN.
CPIN is primarily the pin capacitance. RIN is typically 2.2 kΩ and
is a lumped component composed of serial resistors and the on
resistance of the switches. CIN is typically 27 pF and is mainly
the ADC sampling capacitor.
Selectable Low-Pass Filter
During the conversion phase, where the switches are opened,
filter that reduces undesirable aliasing effects and limits the
noise from the driving circuitry. The low-pass filter can be pro-
grammed for the full bandwidth or of the bandwidth with
Note that the converter throughput must also be reduced by
when using the filter. If the maximum throughput is used with the
bandwidth (BW) set to , the converter acquisition time, tACQ, is
violated, resulting in increased THD.
相关PDF资料 |
PDF描述 |
|---|---|
| D38999/26FJ20AN | CONN HSG PLUG 30POS STRGHT PINS |
| R4MZ | CONN PLUG CORD 4POS MALE R/A |
| CS5361-KSZR | IC ADC AUD 114DB 204KHZ 24-SOIC |
| D38999/20MJ43BN | CONN HSG RCPT 43POS WALL MT SCKT |
| VE-BN2-MY | CONVERTER MOD DC/DC 15V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7683 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 100 kSPS PulSAR ADC in MSOP/QFN |
| AD7683ACPZRL | 功能描述:IC ADC 16BIT SRL 100KSPS 8LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7683ACPZRL7 | 功能描述:IC ADC 16BIT 100KSPS 8LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7683ARM | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 16-bit Serial 8-Pin MSOP Tube |
| AD7683ARMRL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 16-bit Serial 8-Pin MSOP T/R |
发布紧急采购，3分钟左右您将得到回复。