- 您现在的位置：买卖IC网 > PDF目录17030 > EVAL-AD7731EBZ (Analog Devices Inc)BOARD EVALUATION FOR AD7731 PDF资料下载
参数资料
| 型号： | EVAL-AD7731EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/44页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7731 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 6.4k |
| 数据接口： | 串行 |
| 输入范围： | ±1.28 V |
| 在以下条件下的电源（标准）： | 67.5mW @ 6.4kSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7731 |
| 已供物品： | 板，CD |
| 相关产品： | AD7731BNZ-ND - IC ADC 24BIT SIGMA-DELTA 24DIP AD7731BRUZ-REEL7-ND - IC ADC 24BIT SIGMA-DELTA 24TSSOP AD7731BRUZ-REEL-ND - IC ADC 24BIT SIGMA-DELTA 24TSSOP AD7731BRUZ-ND - IC ADC 24BIT SIGMA-DELTA 24TSSOP AD7731BRZ-REEL7-ND - IC ADC 24BIT SIGMA-DELTA 24-SOIC AD7731BRZ-REEL-ND - IC ADC 24BIT SIGMA-DELTA 24-SOIC AD7731BRZ-ND - IC ADC 24BIT SIGMA-DELTA 24-SOIC AD7731BRU-REEL7-ND - IC ADC 24BIT SIGMA-DELTA 24TSSOP AD7731BRU-ND - IC ADC 24BIT SIGMA-DELTA 24TSSOP AD7731BR-REEL7-ND - IC ADC 24BIT SIGMA-DELTA 24-SOIC 更多... |
第1页第2页第3页第4页第5页当前第6页第7页第8页第9页第10页第11页第12页第13页第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页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页
AD7731
–14–
REV. 0
Bit
Location
Mnemonic
Description
CR3
ZERO
A zero must be written to this bit to ensure correct operation of the AD7731.
CR2-CR0
RS2-RS0
Register Selection Bits. RS2 is the MSB of the three selection bits. The three bits select to which
one of eight on-chip registers the next read or write operation takes place as shown in Table VIII.
Table VIII. Register Selection
RS2
RS1
RS0
Register
0
Communications Register (Write Operation)
0
Status Register (Read Operation)
0
1
Data Register
0
1
0
Mode Register
0
1
Filter Register
1
0
No Register Access
1
0
1
Offset Register
1
0
Gain Register
1
Test Register
Status Register (RS2-RS0 = 0, 0, 0); Power-On/Reset Status: CX Hex
The Status Register is an 8-bit read-only register. To access the Status Register, the user must write to the Communications Register
selecting either a single-shot read or continuous read mode and load bits RS2, RS1, RS0 with 0, 0, 0. Table IX outlines the bit desig-
nations for the Status Register. SR0 through SR7 indicate the bit location, SR denoting the bits are in the Status Register. SR7 de-
notes the first bit of the data stream. Figure 5 shows a flowchart for reading from the registers on the AD7731. The number in brackets
indicates the power-on/reset default status of that bit.
Table IX. Status Register
7
R
S6
R
S5
R
S4
R
S3
R
S2
R
S1
R
S0
R
S
Y
D
R
)
1
(
Y
D
T
S
)
1
(
)
0
(
Y
B
T
S)
0
(
F
E
R
O
N)
X
(
3
S
M)
X
(
2
S
M)
X
(
1
S
M)
X
(
0
S
M
Bit
Location
Mnemonic
Description
SR7
RDY
Ready Bit. This bit provides the status of the
RDY flag from the part. The status and func-
tion of this bit is the same as the
RDY output pin. A number of events set the RDY bit high
as indicated in Table XVII.
SR6
STDY
Steady Bit. This bit is updated when the filter writes a result to the Data Register. If the filter
is in FASTStep mode (see Filter Register section), and responding to a step input, the
STDY bit remains high as the initial conversion results become available. The RDY output
and bit are set low on these initial conversions to indicate that a result is available. However,
if the
STDY is high, it indicates that the result being provided is not from a fully settled
second-stage FIR filter. When the FIR filter has fully settled, the
STDY bit will go low coin-
cident with
RDY. If the part is never placed into its FASTStep mode, the STDY bit will go
low at the first Data Register read and it is not cleared by subsequent Data Register reads.
A number of events set the
STDY bit high as indicated in Table XVII. STDY is set high
along with
RDY by all events in the table except a Data Register read.
SR5
STBY
Standby Bit. This bit indicates whether the AD7731 is in its Standby Mode or normal mode
of operation. The part can be placed in its standby mode using the
STANDBY input pin or
by writing 011 to the MD2 to MD0 bits of the Mode Register. The power-on/reset status of
this bit is 0 assuming the
STANDBY pin is high.
SR4
NOREF
No Reference Bit. If the voltage between the REF IN(+) and REF IN(–) pins is below 0.5 V
or either of these inputs is open-circuit, the NOREF bit goes to 1. If NOREF is active on
completion of a conversion, the Data Register is loaded with all 1s. If NOREF is active on
completion of a calibration, updating of the calibration registers is inhibited.
SR3-SR0
MS3-MS0
These bits are for factory use. The power-on/reset status of these bits varies depending on the
factory-assigned number.
REV. A
相关PDF资料 |
PDF描述 |
|---|---|
| VI-B7J-EY | CONVERTER MOD DC/DC 36V 50W |
| RMM06DTKN-S288 | CONN EDGECARD 12POS .156 EXTEND |
| VI-B7H-EY | CONVERTER MOD DC/DC 52V 50W |
| SDS130R-302N | INDUCTOR PWR SHIELDED 3.0UH SMD |
| VI-B74-EY | CONVERTER MOD DC/DC 48V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7732EB | 制造商:Analog Devices 功能描述:2-CHANNEL, ??10 V INPUT RANGE, HIGH THROUGHPUT, 24-BIT ADC |
| EVAL-AD7732EBZ | 功能描述:BOARD EVAL FOR AD7732 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-AD7734EBZ | 功能描述:BOARD EVALUATION FOR AD7734 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-AD7738EB | 制造商:Analog Devices 功能描述:Evaluation Board For AD7738 ADC 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD7738EBZ | 功能描述:BOARD EVAL FOR AD7738 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。