參數(shù)資料
型號: AD7738BRUZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 2/28頁
文件大?。?/td> 0K
描述: IC ADC 24BIT 8CH SIG-DEL 28TSSOP
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 24
采樣率(每秒): 15.4k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 100mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 28-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 8 個單端,單極;8 個單端,雙極;4 個差分,單極;4 個差分,雙極
配用: EVAL-AD7738EBZ-ND - BOARD EVAL FOR AD7738
REV. 0
–10–
AD7738
CHOPPING DISABLED
The second mode, in which the AD7738 is configured with chopping disabled (CHOP = 0), provides faster conversion time while still
maintaining high resolution. Tables IV to VI show the –3 dB frequencies and typical performance versus channel conversion time or
equivalent output data rate, respectively. Table IV shows the typical output rms noise. Table V shows the typical effective resolution
based on the rms noise. Table VI 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 IV. Typical Output RMS Noise in
V vs. Conversion Time and Input Range with
Chopping Disabled
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
7Fh
1357
737
671
2.7
1.5
92
5Ch
992
1008
917
3.0
1.8
35
23h
398
2511
2285
5.1
3.0
16
10h200
4991
2510
7.5
4.5
99h127
7847
7141
10.2
5.9
88h
117
8545
7776
11.4
6.5
33h65
15398
14013
15.5
10.3
Table V. Typical RMS Resolution in Bits vs. Conversion Time and Input Range with
Chopping Disabled
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
7Fh
1357
737
671
20.8
19.8
20.6
19.6
18.6
92
5Ch
992
1008
917
20.6
19.6
20.4
19.4
18.4
35
23h
398
2511
2285
19.9
18.9
19.6
18.6
17.6
16
10h200
4991
2510
19.3
18.3
19.0
18.0
17.0
99h127
7847
7141
18.9
17.9
18.7
17.7
16.7
88h
117
8545
7776
18.7
17.7
18.5
17.5
16.5
33h65
15398
14013
18.0
16.7
17.8
17.1
16.1
Table VI. Typical Peak-to-Peak Resolution in Bits vs. Conversion Time and Input Range with
Chopping Disabled
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
7Fh
1357
737
671
17.9
16.9
17.8
16.8
15.8
92
5Ch
992
1008
917
17.8
16.8
17.4
16.4
15.4
35
23h
398
2511
2285
17.0
16.0
16.8
15.8
14.8
16
10h200
4991
2510
16.3
15.3
16.2
15.2
14.2
99h127
7847
7141
16.1
15.1
15.9
14.9
13.9
88h
117
8545
7776
16.0
15.0
15.7
14.7
13.7
33h65
15398
14013
15.0
14.0
14.8
13.8
12.8
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AD7738BRUZ-REEL IC ADC 24BIT 8CH SIG-DEL 28TSSOP
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