- 您现在的位置：买卖IC网 > PDF目录10322 > AD7812YRUZ-REEL7 (Analog Devices Inc)IC ADC 10BIT 8-CHAN SRL 20-TSSOP PDF资料下载
参数资料
| 型号： | AD7812YRUZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 8-CHAN SRL 20-TSSOP |
| 标准包装： | 1,000 |
| 位数： | 10 |
| 采样率（每秒）： | 350k |
| 数据接口： | DSP，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 10.5mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极；7 伪差分，单极 |
AD7811/AD7812
–13–
REV. B
t
POWER-UP
1.5 s
CONVST
t
CONVERT
2.3 s
100 s @ 10kSPS
POWER-DOWN
t
CYCLE
Figure 11. Automatic Power-Down
For example, if the AD7811 is operated in a continuous sam-
pling mode with a throughput rate of 10 kSPS, PD1 = 1,
PD0 = 0 and using the on chip reference the power consump-
tion is calculated as follows. The power dissipation during nor-
mal operation is 10.5 mW, VDD = 3 V. If the power-up time is
1.5
s and the conversion time is 2.3 s, the AD7811 can be
said to dissipate 10.5 mW for 3.8
s (worst-case) during each
conversion cycle. If the throughput rate is 10 kSPS, the cycle
time is 100
s and the average power dissipated during each
cycle is (3.8/100)
× (10.5 mW) = 400 W.
Figure 12 shows the Power vs. Throughput Rate for automatic
full power-down.
THROUGHPUT – kSPS
10
1
0.01
050
10
0.1
20
30
40
5
15
253545
POWER
–
mV
Figure 12. AD7811/AD7812 Power vs. Throughput
FREQUENCY – kHz
0
–10
–100
0
122
17
87
105
–40
–70
–80
–90
–20
–30
–60
–50
35
52
70
140
157
174
AD7811/12
2048 POINT FFT
SAMPLING 357.142kHz
fIN = 30.168kHz
dBs
Figure 13. AD7811/AD7812 SNR
QUICK EVALUATION SETUP
The schematic shown in Figure 14 shows a suggested configura-
tion of the AD7812 for a first look evaluation of the part. No
external reference circuit is needed as the V
REF pin can be
connected to V
DD. The CONVST signal is connected to TFS
and RFS to enable the serial port. Also by selecting Mode 2
operation (see Operating Modes section) the power performance
of the AD7812 can be evaluated.
10 F
10nF
VREF
DIN
SCLK
CONVST
VDD
CREF
VIN1
AGND
TFS
RFS
DOUT
A0
DGND
0.1 F
VIN2
AD7812
0V TO VDD
INPUT
VIN7
VIN8
SUPPLY
VDD
Figure 14. Evaluation Quick Setup
The setup uses a full duplex, 16-bit, serial interface protocol,
e.g., SPI. It is possible to use 8-bit transfers by carrying out two
consecutive read/write operations. The MSB of data is trans-
ferred first.
1. When power is first connected to the device it is in a powered
down mode of operation and is consuming only 1
A. The
AD7812 must first be configured by carrying out a serial
write operation.
2. The
CONVST signal is first pulsed to enable the serial port
(rising and falling edge on RFS and TFS respectively—see
Serial Interface section).
3. Next, a 16-bit serial read/write operation is carried out. By
writing 6040 Hex to the AD7812 the part is powered up, set
up to use external reference (i.e., VDD) and the analog input
VIN1 is selected. The data read from the part during this read/
write operation is invalid.
4. It is necessary to wait approximately 1.5
s before pulsing
CONVST again and initiating a conversion. The 1.5
s is to
allow the AD7812 to power up correctly—see Power-Up
Times section.
5. Approximately 2.3
s after the falling edge of CONVST, i.e.,
after the end of the conversion, a serial read/write can take
place. This time 4040 Hex is written to the AD7812 and the
data read from the part is the result of the conversion. The
output code is in a straight binary format and will be left
justified in the 16-bit serial register (MSB clocked out first).
6. By idling the
CONVST signal high or low it is possible to
operate the AD7812 in Mode 1 and Mode 2 respectively.
C
相关PDF资料 |
PDF描述 |
|---|---|
| MS27505E13F35PA | CONN RCPT 22POS BOX MNT W/PINS |
| AD7812YRZ-REEL | IC ADC 10BIT 8CHAN SRL 20SOIC |
| AD7323BRUZ-REEL | IC ADC 12BIT+SAR 4CHAN 16-TSSOP |
| AD7277BRMZ-REEL | IC ADC 10BIT 3MSPS HS LP 8MSOP |
| AD7812YRUZ-REEL | IC ADC 10BIT 8-CHAN SRL 20-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7812YRZ | 功能描述:IC ADC 10BIT 8-CHAN SRL 20-SOIC 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 |
| AD7812YRZ-REEL | 功能描述:IC ADC 10BIT 8CHAN SRL 20SOIC 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: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 |
| AD7812YRZ-REEL7 | 功能描述:IC ADC 10BIT 8CHAN SRL 20SOIC 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: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 |
| AD7813 | 制造商:AD 制造商全称:Analog Devices 功能描述:+2.7 V to +5.5 V, 400 kSPS 8-/10-Bit Sampling ADC |
| AD7813YN | 制造商:Analog Devices 功能描述:ADC Single SAR 400ksps 10-bit Parallel 16-Pin PDIP 制造商:Analog Devices 功能描述:IC 8BIT ADC S/P 7813 DIP16 |
发布紧急采购，3分钟左右您将得到回复。