- 您现在的位置：买卖IC网 > PDF目录10234 > AD7687BRMZRL7 (Analog Devices Inc)IC ADC 16BIT 250KSPS 10MSOP PDF资料下载
参数资料
| 型号： | AD7687BRMZRL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 250KSPS 10MSOP |
| 标准包装： | 1,000 |
| 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）： | 12.5mW |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，双极 |
| 配用： | EVAL-AD7687CBZ-ND - BOARD EVALUATION FOR AD7687 |
第1页第2页第3页第4页当前第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
Data Sheet
AD7687
Rev. B | Page 13 of 28
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
02972-
024
Figure 25. ADC Simplified Schematic
CIRCUIT INFORMATION
The AD7687 is a fast, low power, single-supply, precise 16-bit
ADC using a successive approximation architecture.
The AD7687 is capable of converting 250,000 samples per
second (250 kSPS) and powers down between conversions.
When operating at 100 SPS, for example, it typically consumes
1.35 μW, which is ideal for battery-powered applications.
The AD7687 provides the user with an on-chip track-and-hold
and does not exhibit any pipeline delay or latency, making it
ideal for multiple multiplexed channel applications.
The AD7687 is specified from 2.3 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.
CONVERTER OPERATION
The AD7687 is a successive approximation ADC based on a
charge redistribution DAC. Figure 25 shows the simplified
schematic of the ADC. The capacitive DAC consists of two
identical arrays of 16 binary weighted capacitors, which are
connected to the two comparator inputs.
During the acquisition phase, terminals of the array tied to the
comparator’s input are connected to GND via SW+ and SW.
All independent switches are connected to the analog inputs.
Thus, 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 is initiated. 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,
in order 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 AD7687 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 |
|---|---|
| AD9221ARZ-REEL | IC ADC 12BIT 1.5MSPS 28SOIC |
| MS27472E20B41P | CONN RCPT 41POS WALL MT W/PINS |
| 13380-10SG-326 | CONN PLUG 10POS CABLE SKT |
| LTC1417AIGN | IC A/D CONV 14BIT SAMPLNG 16SSOP |
| MS27467T11B99P | CONN PLUG 7POS STRAIGHT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7688 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN |
| AD76881 | 制造商:AD 制造商全称:Analog Devices 功能描述:18-Bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN) |
| AD7688ARM | 制造商:Analog Devices 功能描述:16-BIT DIFF, 550KSPS SERIAL MSOP ADC - Bulk |
| AD7688BCPZ-R2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD7688BCPZRL | 功能描述:IC ADC 16BIT SAR 500KSPS 10LFCSP 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: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 |
发布紧急采购，3分钟左右您将得到回复。