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参数资料
| 型号： | EVAL-AD7738EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7738 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 15.4k |
| 数据接口： | 串行 |
| 输入范围： | ±2.5 V |
| 在以下条件下的电源（标准）： | 85mW @ 5V |
| 工作温度： | -40°C ~ 105°C |
| 已用 IC / 零件： | AD7738 |
| 已供物品： | 板 |
| 相关产品： | AD7738BRUZ-REEL7-ND - IC ADC 24BIT 8CH SIG-DEL 28TSSOP AD7738BRUZ-REEL-ND - IC ADC 24BIT 8CH SIG-DEL 28TSSOP AD7738BRUZ-ND - IC ADC 24BIT 8-CH 28-TSSOP AD7738BRU-REEL7-ND - IC ADC 24BIT 8CH SIG-DEL 28TSSOP AD7738BRU-ND - IC ADC 24BIT 8-CH 28-TSSOP |
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REV. 0
AD7738
–25–
Figure 16. Typical ADC Frequency Response
NORMALIZED INPUT FREQUENCY
(INPUT FREQUENCY
CONVERSION TIME)
0
0.1
10
1
GAIN
–
dB
–10
–20
–30
–40
–50
–60
CHOP = 1
a. Chopping Enabled
NORMALIZED INPUT FREQUENCY
(INPUT FREQUENCY
CONVERSION TIME)
0
0.1
1000
1
GAIN
–
dB
–10
–20
–30
–40
–50
–60
10
100
CHOP = 0
b. Chopping Disabled
Analog Inputs Voltage Range
The absolute input voltage range with input the buffer enabled
is restricted from AGND + 200 mV to AVDD – 300 mV, which
also places restrictions on the common-mode range. Care must
be taken in setting up the common-mode voltage and input
voltage range so that these limits are not exceeded, otherwise
there will be degradation in linearity performance.
The analog inputs on the AD7738 can accept either unipolar or
bipolar input voltage ranges. Bipolar input ranges do not imply
that the part can handle negative voltages with respect to system
ground on its analog inputs. Unipolar and bipolar signals on the
AIN(+) input are referenced to the voltage on the respective
AIN(–) input.
For example, if AINCOM is 2.5 V and CH0 is configured to
measure AIN0 – AINCOM, 0 V to 1.25 V, the input voltage
range on the AIN0 input is 2.5 V to 3.75 V. If CH0 is config-
ured to measure AIN0 – AINCOM,
±1.25 V, the input voltage
range on the AIN0 input is 1.25 V to 3.75 V.
Analog Inputs Extended Voltage Range
The AD7738 output data code span corresponds to the nominal
input voltage range. However, the correct operation of the ADC
is guaranteed within the min/max input voltage range.
When the CLAMP bit of the Mode register is set to 1, the
Channel Data register will be digitally clamped either to all
zeros or all ones when the analog input voltage goes outside
the nominal input voltage range.
As shown in Tables XIII and XIV, when CLAMP = 0, the data
reflect the analog input voltage outside the nominal voltage
range. In this case, the SIGN and OVR bits in the Channel
Status register should be considered along with the Data register
value to decode the actual conversion result.
Table XIII. Input Voltage Range
1.25 V, 16 Bits, CLAMP = 0
Input (V)
Data (Hex)
SIGN
OVR
+1.45000
147B
0
1
+1.25008
0001
0
1
+1.25004
0000
0
1
+1.25000
FFFF
0
+0.00004
8001
0
0.00000
8000
0
–0.00004
7FFF
1
0
–1.25000
0000
1
0
–1.25004
FFFF
1
–1.25008
FFFE
1
–1.45000
EB85
1
Table XIV. Input Voltage Range 0 V to 1.25 V, 16 Bits,
CLAMP = 0
Input (V)
Data (Hex)
SIGN
OVR
1.45000
28F5
0
1
1.25004
0001
0
1
1.25002
0000
0
1
1.25000
FFFF
0
0.00002
0001
0
0.00000
0000
0
–0.00002
0000
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7739EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD7739EBZ | 功能描述:BOARD EVAL FOR AD7739 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-AD7741/42EB | 制造商:Analog Devices 功能描述:Evaluation Board For Single And Multi-Channel Synchronous Voltage-To-Frequency Converters 制造商:Analog Devices 功能描述:EVALUATION BOARD IC - Bulk |
| EVAL-AD7741/42EBZ | 功能描述:BOARD EVAL FOR AD7741/7742 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EVAL-AD7741-42EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
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