- 您现在的位置：买卖IC网 > PDF目录17040 > EVAL-AD7686CBZ (Analog Devices Inc)BOARD EVALUATION FOR AD7686 PDF资料下载
参数资料
| 型号： | EVAL-AD7686CBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7686 |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| ADC 的数量： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 500k |
| 数据接口： | 串行 |
| 输入范围： | ±VREF |
| 在以下条件下的电源（标准）： | 15mW @ 500kSPS，5 V |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7686 |
| 已供物品： | 板 |
| 相关产品： | AD7686CCPZRL7TR-ND - IC ADC 16BIT SAR 500KSPS 10LFCSP AD7686CCPZRL-ND - IC ADC 16BIT SAR 500KSPS 10LFCSP AD7686BCPZRL7TR-ND - IC ADC 16BIT 500KSPS 10-LFCSP AD7686BCPZRL-ND - IC ADC 16BIT 500KSPS 10-LFCSP AD7686CRMZ-ND - IC ADC 16BIT 500KSPS 10MSOP AD7686BRMZ-ND - IC ADC 16BIT 500KSPS 10-MSOP AD7686CRMZRL7-ND - IC ADC 16BIT 500KSPS 10MSOP AD7686BRMZRL7-ND - IC ADC 16BIT 500KSPS 10MSOP |
第1页第2页第3页当前第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页第22页第23页第24页第25页第26页第27页第28页
AD7686
Rev. B | Page 12 of 28
THEORY OF OPERATION
SW+
MSB
16,384C
IN+
LSB
COMP
CONTROL
LOGIC
SWITCHES CONTROL
BUSY
OUTPUT CODE
CNV
REF
GND
IN–
4C
2C
C
32,768C
SW–
MSB
16,384C
LSB
4C
2C
C
32,768C
0
296
9-
0
24
Figure 24. ADC Simplified Schematic
CIRCUIT INFORMATION
The AD7686 is a fast, low power, single-supply, precise 16-bit
ADC using a successive approximation architecture.
The AD7686 is capable of converting 500,000 samples per
second (500 kSPS) and powers down between conversions.
For example, when operating at 100 SPS, the device consumes
3.75 μW typically, which is ideal for battery-powered
applications.
The AD7686 provides the user with on-chip, track-and-hold
and does not exhibit any pipeline delay or latency, making it
ideal for multiple, multiplexed channel applications.
The AD7686 is specified from 4.5 V to 5.5 V and can be
interfaced to any of the 1.8 V to 5 V digital logic family. It is
housed in a 10-lead MSOP or a tiny 10-lead QFN (LFCSP) that
combines space savings and allows flexible configurations.
This device is pin-for-pin-compatible with the AD7685,
CONVERTER OPERATION
The AD7686 is a successive approximation ADC based on a
charge redistribution DAC. Figure 24 shows a simplified
schematic of the ADC. The capacitive DAC consists of two
identical arrays of 16 binary weighted capacitors, which are
connected to two comparator inputs.
During the acquisition phase, terminals of the array tied to the
comparator input are connected to GND via SW+ and SW.
All independent switches are connected to the analog inputs.
Therefore, the capacitor arrays are used as sampling capacitors
and acquire the analog signal on the IN+ and IN inputs. When
the acquisition phase is complete and the CNV input goes high,
a conversion phase initiates. When the conversion phase begins,
SW+ and SW are opened first.
The two capacitor arrays are then disconnected from the inputs
and connected to the GND input. Therefore, the differential
voltage between the inputs IN+ and IN, captured at the end of
the acquisition phase, is applied to the comparator inputs,
causing the comparator to become unbalanced.
By switching each element of the capacitor array between GND
and REF, the comparator input varies by binary weighted
voltage steps (VREF/2, VREF/4 . . . VREF/65536). The control logic
toggles these switches, starting with the MSB, to bring the
comparator back into a balanced condition. After the
completion of this process, the part returns to the acquisition
phase and the control logic generates the ADC output code and
a busy signal indicator. Because the AD7686 has an on-board
conversion clock, the serial clock, SCK, is not required for the
conversion process.
相关PDF资料 |
PDF描述 |
|---|---|
| HBC06DRTH-S93 | CONN EDGECARD 12POS DIP .100 SLD |
| MCP355XDV-MS1 | BOARD DEV SENSOR APP MCP355X |
| UPB2D681MRD | CAP ALUM 680UF 200V 20% RADIAL |
| MLG1005S68NJ | INDUCTOR MULTILAYER 68NH 0402 |
| GCC06DRYI-S93 | CONN EDGECARD 12POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7686SDZ | 功能描述:数据转换 IC 开发工具 EVAL BOARD 100Ksps/400Ksps 16 bit I.C RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| EVAL-AD7687CB | 制造商:Analog Devices 功能描述:EVAL BOARD 16-BIT, 250KSPS DIFFER . I.C. - Bulk |
| EVAL-AD7687CBZ | 功能描述:BOARD EVALUATION FOR AD7687 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:PulSAR® 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 |
| EVAL-AD7687SDZ | 功能描述:BOARD EVAL FOR AD7687 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:PulSAR® 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 |
| EVAL-AD7688CB | 制造商:Analog Devices 功能描述:EVAL BD FOR USE W/ EITHER THE ANLG DEVICES - Bulk |
发布紧急采购，3分钟左右您将得到回复。