- 您现在的位置：买卖IC网 > PDF目录1980 > AD7265BSUZ-REEL7 (Analog Devices Inc)IC ADC 12BIT 3CHAN 1MSPS 32TQFP PDF资料下载
参数资料
| 型号： | AD7265BSUZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 3CHAN 1MSPS 32TQFP |
| 设计资源： | AD7265 in Differential and Single-Ended Configurations Using AD8022 (CN0048) |
| 标准包装： | 500 |
| 位数： | 12 |
| 采样率（每秒）： | 1M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 21mW |
| 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： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 12 个单端，单极；6 个差分，单极；6 个伪差分，单极 |
第1页第2页第3页第4页第5页第6页当前第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页第29页
AD7265
Rev. A | Page 14 of 28
VDD
C1
D
VIN+
R1 C2
VDD
C1
D
VIN–
R1 C2
04674-
015
Figure 21 shows a graph of the THD vs. the analog input
frequency for various supplies while sampling at 1 MSPS. In this
case, the source impedance is 47 Ω.
04674-018
INPUT FREQUENCY (kHz)
600
0
200
100
400
300
500
THD
(dB)
–50
–60
–55
–65
–70
–75
–80
–85
–90
VDD = 3V
SINGLE-ENDED MODE
VDD = 5V
SINGLE-ENDED MODE
VDD = 3V
DIFFERENTIAL MODE
VDD = 5V
DIFFERENTIAL MODE
FSAMPLE = 1MSPS
VDD = 3V/5V
RANGE = 0 TO VREF
Figure 18. Equivalent Analog Input Circuit,
Conversion Phase—Switches Open, Track Phase—Switches Closed
When no amplifier is used to drive the analog input, the source
impedance should be limited to low values. The maximum source
impedance depends on the amount of THD that can be toler-
ated. The THD increases as the source impedance increases and
performance degrades.
Figure 21. THD vs. Analog Input Frequency for Various Supply Voltages
Figure 19 shows a graph of the THD vs.
the analog input signal frequency for different source impedances
in single-ended mode, while
ANALOG INPUTS
Figure 20 shows the THD vs. the
analog input signal frequency for different source impedances
in differential mode.
The AD7265 has a total of 12 analog inputs. Each on-board
ADC has six analog inputs that can be configured as six single-
ended channels, three pseudo differential channels, or three
fully differential channels. These can be selected as described in
the
0
4674
-01
6
INPUT FREQUENCY (kHz)
600
0200
100
400
300
500
TH
D
(
dB
)
–50
–60
–55
–65
–70
–75
–80
–85
–90
FSAMPLE = 1MSPS
VDD = 3V
RANGE = 0V TO VREF
RSOURCE = 0
RSOURCE = 10
RSOURCE = 47
RSOURCE = 100
RSOURCE = 300
Analog Input Selection section.
Single-Ended Mode
The AD7265 can have a total of 12 single-ended analog input
channels. In applications where the signal source has high
impedance, it is recommended to buffer the analog input before
applying it to the ADC. The analog input range can be pro-
grammed to be either 0 to V
or 0 to 2 × V
.
REF
If the analog input signal to be sampled is bipolar, the internal
reference of the ADC can be used to externally bias up this
signal to make it correctly formatted for the ADC. Figure 22
shows a typical connection diagram when operating the ADC
in single-ended mode.
Figure 19. THD vs. Analog Input Frequency for
Various Source Impedances, Single-Ended Mode
VIN
0V
+1.25V
–1.25V
DCAPA/DCAPB
VA1
VB6
R
3R
R
0V
+2.5V
0.47F
1ADDITIONAL PINS OMITTED FOR CLARITY.
04
67
4-
0
19
AD72651
04
674-
017
INPUT FREQUENCY (kHz)
600
0200
100
400
300
500
TH
D
(
dB
)
–60
–65
–70
–75
–80
–85
–90
FSAMPLE = 1MSPS
VDD = 3V
RANGE = 0V TO VREF
RSOURCE = 300
RSOURCE = 0
RSOURCE = 10
RSOURCE = 47
RSOURCE = 100
Figure 22. Single-Ended Mode Connection Diagram
Figure 20. THD vs. Analog Input Frequency for
Various Source Impedances, Differential Mode
相关PDF资料 |
PDF描述 |
|---|---|
| AD7266BSUZ | IC ADC 12BIT 3CH 2MSPS 32-TQFP |
| AD7274BRM | IC ADC 12BIT 3MSPS HS LP 8MSOP |
| AD7276BRM | IC ADC 12BIT 3MSPS HS LP 8MSOP |
| AD7291BCPZ-RL7 | IC ADC I2C/SRL 22.22K 20LFCSP |
| AD7298-1BCPZ-RL | IC ADC 10BIT SPI/SRL 8CH 20LFCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7266 | 制造商:Analog Devices 功能描述:- Bulk |
| AD7266ACP | 制造商:Analog Devices 功能描述:ADC DUAL SAR 2MSPS 12-BIT SERL 32LFCSP - Bulk |
| AD7266ASU | 制造商:Analog Devices 功能描述:ADC DUAL SAR 2MSPS 12-BIT SERL 32TQFP - Bulk |
| AD7266BCP | 制造商:Analog Devices 功能描述:ADC Dual SAR 2Msps 12-bit Serial 32-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:DUAL, 2 MSPS, 3-CH SIMULTANEOUS SAMPLING ADC - Bulk |
| AD7266BCP-U1 | 制造商:Analog Devices 功能描述: |
发布紧急采购，3分钟左右您将得到回复。