- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10664 > AD7731BRZ (Analog Devices Inc)IC ADC 24BIT SIGMA-DELTA 24-SOIC PDF資料下載
參數(shù)資料
| 型號： | AD7731BRZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 24BIT SIGMA-DELTA 24-SOIC |
| 標準包裝： | 31 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 6.4k |
| 數(shù)據(jù)接口： | DSP，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 125mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 3 個差分，單極；3 個差分，雙極；5 個偽差分，單極；5 個偽差分，雙極 |
| 產(chǎn)品目錄頁面： | 779 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7731EBZ-ND - BOARD EVALUATION FOR AD7731 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
AD7731
–18–
REV. 0
Bit
Location
Mnemonic
Description
MR3
BO
Burnout Current Bit. A 1 in this bit activates the burnout currents. When active, the burnout
currents connect to the selected analog input pair, one source current to the AIN(+) input
and one sink current to the AIN(–) input. A 0 in this bit turns off the on-chip burnout
currents.
MR2–MR0
CH2–CH0
Channel Select. These three bits select a channel either for conversion or for access to cali-
bration coefficients as outlined in Table XIII. There are three pairs of calibration registers on
the part. In fully differential mode, the part has three input channels so each channel has its
own pair of calibration registers. In pseudo-differential mode, the AD7731 has five input
channels with some of the input channel combinations sharing calibration registers. With
CH2, CH1 and CH0 at a logic 1, the part looks at the AIN6 input internally shorted to itself.
This can be used as a test method to evaluate the noise performance of the part with no ex-
ternal noise sources. In this mode, the AIN6 input should be connected to an external volt-
age within the allowable common-mode range for the part. The power-on/default status of
these bits is 1, 0, 0.
Table XIII. Channel Selection
CH2
CH1
CH0 AIN(+) AIN(–) Type
Calibration Register Pair
0
AIN1
AIN6
Pseudo Differential
Register Pair 0
0
1
AIN2
AIN6
Pseudo Differential
Register Pair 1
0
1
0
AIN3
AIN6
Pseudo Differential
Register Pair 2
0
1
AIN4
AIN6
Pseudo Differential
Register Pair 2
1
0
AIN1
AIN2
Fully Differential
Register Pair 0
1
0
1
AIN3
AIN4
Fully Differential
Register Pair 1
1
0
AIN5
AIN6
Fully Differential
Register Pair 2
1
AIN6
Test Mode
Register Pair 2
Filter Register (RS2-RS0 = 0, 1, 1); Power-On/Reset Status: 2002 Hex
The Filter Register is a 16-bit register from which data can either be read or to which data can be written. This register determines
the amount of averaging performed by the filter and the mode of operation of the filter. It also sets the chopping mode. Table XIV
outlines the bit designations for the Filter Register. FR0 through FR15 indicate the bit location, FR denoting the bits are in the Filter
Register. FR15 denotes the first bit of the data stream. The number in brackets indicates the power-on/reset default status of that bit.
Figure 5 shows a flowchart for reading from the registers on the AD7731 and Figure 6 shows a flowchart for writing to the registers
on the part.
Table XIV. Filter Register
5
1
R
F4
1
R
F3
1
R
F2
1
R
F1
1
R
F0
1
R
F9
R
F8
R
F
)
0
(
1
F
S)
0
(
0
1
F
S)
1
(
9
F
S)
0
(
8
F
S)
0
(
7
F
S)
0
(
6
F
S)
0
(
5
F
S)
0
(
4
F
S
7
R
F6
R
F5
R
F4
R
F3
R
F2
R
F1
R
F0
R
F
)
0
(
3
F
S)
0
(
2
F
S)
0
(
1
F
S)
0
(
0
F
S)
0
(
O
R
E
Z)
0
(
P
H
C)
1
(
P
I
K
S)
0
(
T
S
A
F
Bit
Location
Mnemonic
Description
FR15–FR4
SF11–SF0
Sinc
3 Filter Selection Bits. The AD7731 contains two filters, a Sinc3 filter and an FIR filter.
The 12 bits programmed to SF11 through SF0 sets the amount of averaging which the Sinc
3
filter performs. As a result, the number programmed to these 12 bits affects the –3 dB fre-
quency and output update rate from the part (see Filter Architecture section). The allowable
range for SF words depends on whether the part is operated with CHP on or off and SKIP
on or off. Table XV outlines the SF ranges for different setups.
REV. A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2355IMSE-14#PBF | IC ADC 14BIT 3.5MSPS 10-MSOP |
| MAX9092AUA+T | IC COMPARATOR GP DUAL 8UMAX |
| VI-B13-MX-F4 | CONVERTER MOD DC/DC 24V 75W |
| LTC2356IMSE-14#PBF | IC ADC 14BIT 3.5MSPS 10-MSOP |
| VI-B13-MX-F3 | CONVERTER MOD DC/DC 24V 75W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7731BRZ | 制造商:Analog Devices 功能描述:IC ADC 24BIT 5MSPS SOIC-24 |
| AD7731BRZ-REEL | 功能描述:IC ADC 24BIT SIGMA-DELTA 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7731BRZ-REEL7 | 功能描述:IC ADC 24BIT SIGMA-DELTA 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7731EB | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise High Throughput 24-Bit Sigma-Delta ADC(411.99 k) |
| AD7732 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2-Channel, +-10 V Input Range, High Throughput, 24-Bit SIGMA- ADC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。