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参数资料
| 型号： | EVAL-AD7738EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 28/28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
–9–
OUTPUT NOISE AND RESOLUTION SPECIFICATION
The AD7738 can be operated with chopping enabled or disabled, allowing the ADC to be programmed either to optimize the
throughput rate and channel switching time or to optimize offset drift performance. Noise tables for these two primary modes of
operation are outlined below for a selection of output rates and settling times.
CHOPPING ENABLED
The first mode, in which the AD7738 is configured with chopping enabled (CHOP = 1), provides very low noise numbers with lower
output rates. Tables I to III show the –3 dB frequencies and typical performance versus channel conversion time or equivalent output
data rate, respectively. Table I shows the typical output rms noise. Table II shows the typical effective resolution based on the rms
noise. Table III shows the typical output peak-to-peak resolution, representing values for which there will be no code flicker within a
six-sigma limit. The peak-to-peak resolutions are not calculated based on rms noise, but on peak-to-peak noise.
These typical numbers are generated from 4096 data samples acquired in Continuous Conversion mode with an analog input voltage
set to 0 V and MCLK = 6.144 MHz. The Conversion Time is selected via the Channel Conversion Time register.
Table I. Typical Output RMS Noise in
V vs. Conversion Time and Input Range with
Chopping Enabled
Conversion
Output
–3 dB
Input Range
Time
Data Rate
Frequency
FW
Register
( s)
(Hz)
2.5 V, +2.5 V
1.25 V, +1.25 V,
625 mV, +625 mV
127
FFh
2686
372
194
1.8
1.1
46
AEh
999
1001
521
3.0
1.8
17
91h
395
2534
1317
5.1
3.0
8
88h
207
4826
2510
8.1
4.5
4
84h
124
8074
4198
9.3
5.3
2
82h
82
12166
6326
17.0
10.6
Table II. Typical Effective Resolution in Bits vs. Conversion Time and Input Range with
Chopping Enabled
Conversion
Output
–3 dB
Input Range
Time
Data Rate
Frequency
FW
Register
( s)
(Hz)
2.5 V
+2.5 V
1.25 V
+1.25 V
625 mV
+625 mV
127
FFh
2686
372
194
21.4
20.4
21.1
20.1
19.1
46
AEh
999
1001
521
20.6
19.6
20.4
19.4
18.4
17
91h
395
2534
1317
19.9
18.9
19.6
18.6
17.6
8
88h
207
4826
2510
19.2
18.2
19.0
18.0
17.0
4
84h
124
8074
4198
19.0
18.0
18.8
17.8
16.8
2
82h
82
12166
6326
18.1
17.1
17.8
16.8
15.8
Table III. Typical Peak-to-Peak Resolution in Bits vs. Conversion Time and Input Range with
Chopping Enabled
Conversion
Output
–3 dB
Input Range
Time
Data Rate
Frequency
FW
Register
( s)
(Hz)
2.5 V
+2.5 V
1.25 V
+1.25 V
625 mV
+625 mV
127
FFh
2686
372
194
18.4
17.4
18.2
17.2
16.2
46
AEh
999
1001
521
17.8
16.8
17.5
16.5
15.5
17
91h
395
2534
1317
16.8
15.8
16.7
15.7
14.7
8
88h
207
4826
2510
16.5
15.5
16.2
15.2
14.2
4
84h
124
8074
4198
16.0
15.0
16.0
15.0
14.0
2
82h
82
12166
6326
15.0
14.0
15.0
14.0
13.0
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| 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 |
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| 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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