参数资料
| 型号： | AD7671ACPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT CMOS 1MSPS 48LFCSP |
| 标准包装： | 2,500 |
| 系列： | PulSAR® |
| 位数： | 16 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 125mW |
| 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： | 48-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 48-LFCSP-VQ（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 4 个单端，单极；4 个单端，双极 |
| 配用： | EVAL-AD7671CBZ-ND - BOARD EVALUATION FOR AD7671 |
AD7671
–16–
75
70
65
60
55
50
45
40
35
1
PSRR
–
dB
FREQUENCY – kHz
10
100
1000
10000
Figure 9. PSRR vs. Frequency
POWER DISSIPATION
In Impulse Mode, the AD7671 automatically reduces its power
consumption at the end of each conversion phase. During the
acquisition phase, the operating currents are very low, which allows a
significant power savings when the conversion rate is reduced,
as shown in Figure 10. This feature makes the AD7671 ideal for
very low power battery applications.
This does not take into account the power, if any, dissipated by
the input resistive scaler, which depends on the input voltage
range used and the analog input voltage even in Power-Down
Mode. There is no power dissipated when the 0 V to 2.5 V is used
or when both the analog input voltage is 0 V and a unipolar range,
0 V to 5 V or 0 V to 10 V, is used.
It should be noted that the digital interface remains active even
during the acquisition phase. To reduce the operating digital
supply currents even further, the digital inputs need to be driven
close to the power rails (i.e., DVDD and DGND) and OVDD
should not exceed DVDD by more than 0.3 V.
100000
10000
1000
100
10
1
0.1
1
10
100
1000
10000
100000
1000000
PO
WER
DISSIP
A
TION
–
W
SAMPLING RATE – SPS
WARP/NORMAL
IMPULSE
Figure 10. Power Dissipation vs. Sample Rate
CONVERSION CONTROL
Figure 11 shows the detailed timing diagrams of the conversion
process. The AD7671 is controlled by the signal
CNVST, which
initiates conversion. Once initiated, it cannot be restarted or
aborted, even by the power-down input PD, until the conversion
is complete. The
CNVST signal operates independently of CS
and
RD signals.
CNVST
BUSY
MODE
t2
t1
t3
t4
t5
t6
t7
t8
ACQUIRE
CONVERT
ACQUIRE
CONVERT
Figure 11. Basic Conversion Timing
In Impulse Mode, conversions can be automatically initiated. If
CNVST is held LOW when BUSY is LOW, the AD7671 controls
the acquisition phase and then automatically initiates a new conver-
sion. By keeping
CNVST LOW, the AD7671 keeps the conversion
process running by itself. It should be noted that the analog input
has to be settled when BUSY goes LOW. Also, at power-up,
CNVST should be brought LOW once to initiate the conversion
process. In this mode, the AD7671 could sometimes run slightly
faster than the guaranteed limits in the Impulse Mode of
666 kSPS. This feature does not exist in Warp or Normal Modes.
Although
CNVST is a digital signal, it should be designed with
special care with fast, clean edges, and levels with minimum over-
shoot and undershoot or ringing. It is a good thing to shield the
CNVST trace with ground and also to add a low value serial
resistor (i.e., 50
W) termination close to the output of the
component that drives this line.
For applications where the SNR is critical, the
CNVST signal
should have a very low jitter. To achieve this, some use a dedicated
oscillator for
CNVST generation, or at least to clock it with a
high frequency low jitter clock as shown in Figure 5.
t9
t8
RESET
DATA BUS
BUSY
CNVST
Figure 12. RESET Timing
REV. C
相关PDF资料 |
PDF描述 |
|---|---|
| AD7674ACPZRL | IC ADC 18BIT SAR 5V 48LFCSP |
| AD7675ACPZ | IC ADC 16BIT SAR 100KSPS 48LFCSP |
| AD7676ASTZRL | IC ADC 16BIT DIFF INP 48LQFP |
| AD7677ACPZ | IC ADC 16BIT DIFF INP 48-LFCSP |
| AD7678ACPZ | IC ADC 18BIT SAR W/BUFF 48LFCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7671AST | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP 制造商:Analog Devices 功能描述:IC 16-BIT ADC |
| AD7671ASTRL | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:16-BIT, 1MSPS CMOS ADC - Tape and Reel |
| AD7671ASTZ | 功能描述:IC ADC 16BIT CMOS 1MSPS 48-LQFP 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 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 |
| AD7671ASTZKL1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD7671ASTZRL | 功能描述:IC ADC 16BIT CMOS 1MSPS 48LQFP 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 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
发布紧急采购，3分钟左右您将得到回复。