- 您现在的位置：买卖IC网 > PDF目录17050 > EVAL-AD7763EDZ (Analog Devices Inc)BOARD EVAL CONTROL AD7763 PDF资料下载
参数资料
| 型号： | EVAL-AD7763EDZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/33页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL CONTROL AD7763 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 625k |
| 数据接口： | 并联 |
| 输入范围： | ±3.25 Vpp |
| 在以下条件下的电源（标准）： | 955.5mW @ 625kSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7763 |
| 已供物品： | 板，CD |
第1页第2页第3页第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页当前第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页第30页第31页第32页第33页
AD7763
Data Sheet
Rev. B | Page 20 of 32
DRIVING THE AD7763
The AD7763 has an on-chip differential amplifier that operates
with a supply voltage (AVDD3) from 3.15 V to 5.25 V. For a 4.096 V
reference, the supply voltage must be 5 V.
To achieve the specified performance in normal mode, the
differential amplifier should be configured as a first-order
antialias filter, as shown in Figure 31. Any additional filtering
should be carried out in previous stages using low noise, high
performance op amps, such as the AD8021.
Suitable component values for the first-order filter are shown in
Table 10. The values in Table 10 yield a 10 dB attenuation at the
first alias point of 19 MHz.
05476-
016
A1
RIN
RFB
CFB
RIN
RM
CS
RFB
CFB
VIN–
A
B
VIN+
Figure 31. Differential Amplifier Configuration
Table 10. Normal Mode Component Values
VREF
RIN
RFB
RM
CS
CFB
4.096 V
1 k
655
18
5.6 pF
33 pF
Figure 32 shows the signal conditioning that occurs using the
circuit in Figure 18 with a ±2.5 V input signal biased around
ground and having the component values and conditions in
The differential amplifier always biases the output signal to sit
on the optimum common mode of VREF/2, in this case, 2.048 V.
The signal is also scaled to give the maximum allowable voltage
swing with this reference value. This is calculated as 80% of
VREF; that is, 0.8 × 4.096 V ≈ 3.275 V p-p on each input.
To obtain maximum performance from the AD7763, it is
advisable to drive the ADC with differential signals. Figure 33
shows how a bipolar, single-ended signal biased around ground
can drive the AD7763 with the use of an external op amp, such as
With a 4.096 V reference, a 5 V supply must be provided to the
reference buffer (AVDD4). With a 2.5 V reference, a 3.3 V supply
must be provided to AVDD4.
05476-
017
+2.5V
0V
–2.5V
+2.5V
0V
–2.5V
+3.685V
+2.048V
+0.410V
+3.685V
+2.048V
+0.410V
A
VIN+
VIN–
B
Figure 32. Differential Amplifier Signal Conditioning
05476-
018
A1
RIN
RFB
CFB
RIN
RM
CS
RFB
CFB
VIN–
VIN
VIN+
AD8021
2R
R
Figure 33. Single-Ended-to-Differential Conversion
05476-
019
CS2
CPB2
SS4
SH4
CPA
SS2
SH2
CS1
CPB1
SS3
SH3
SS1
SH1
ANALOG
MODULATOR
VIN+
Figure 34. Equivalent Input Circuit
The AD7763 employs a double sampling front end, as shown in
Figure 34. For simplicity, only the equivalent input circuit for
VIN+ is shown. The equivalent input circuitry for VIN is the same.
相关PDF资料 |
PDF描述 |
|---|---|
| EVAL-AD7401AEDZ | BOARD EVAL FOR AD7401 |
| HI5860SOICEVAL1 | EVALUATION PLATFORM SOIC HI5860 |
| REC5-0505DRW/H2/A | CONV DC/DC 5W 4.5-9VIN +/-05VOUT |
| REC5-483.3DRW/H2/C | CONV DC/DC 5W 36-72VIN +/-3.3V |
| GCM22DCMH | CONN EDGECARD 44POS .156 WW |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7764EBZ | 制造商:Analog Devices 功能描述:EVAL BD FOR AD7764 - Bulk |
| EVAL-AD7764EDZ | 功能描述:BOARD EVAL AD7764 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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-AD7765EBZ | 制造商:Analog Devices 功能描述:EVAL BOARD 24BIT, 312KSPS, 109DB - Bulk |
| EVAL-AD7765EDZ | 功能描述:BOARD EVAL AD7765 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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-AD7766-1EDZ | 功能描述:BOARD EVAL AD7766-1 64KSPS 111DB RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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 |
发布紧急采购，3分钟左右您将得到回复。