- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10301 > AD7705BRU-REEL7 (Analog Devices Inc)IC ADC 16BIT 2CH 16-TSSOP T/R PDF資料下載
參數(shù)資料
| 型號： | AD7705BRU-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT 2CH 16-TSSOP T/R |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 500 |
| 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）： | 1mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個差分，單極；2 個差分，雙極 |
| 配用： | EVAL-AD7705EBZ-ND - BOARD EVALUATION FOR AD7705 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第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
AD7705/AD7706
Rev. C | Page 16 of 44
ON-CHIP REGISTERS
The AD7705/AD7706 each contain eight on-chip registers that
can be accessed via the serial port. The first of these is a
communication register that controls the channel selection,
decides whether the next operation is a read or write operation,
and decides which register the next read or write operation
accesses.
All communication to the AD7705/AD7706 must start with a
write operation to the communication register. After a power-
on or reset, the device expects a write to its communication
register. The data written to this register determines whether
the next operation is a read or write operation and to which
register this operation occurs. Therefore, write access to any
register on the part starts with a write operation to the
communication register, followed by a write to the selected
register. Likewise, a read operation from any register on the
part, including the communication register itself and the output
data register, starts with a write operation to the communica-
tion register, followed by a read operation from the selected
register. The communication register also controls the standby
mode and channel selection. The DRDY status is available by
reading from the communication register.
The second register is a setup register that determines
calibration mode, gain setting, bipolar/unipolar operation, and
buffered mode. The third register is labeled the clock register
and contains the filter selection bits and clock control bits. The
fourth register is the data register from which the output data is
accessed. The final registers are the calibration registers, which
store channel calibration data. The registers are discussed in
more detail in the following sections.
COMMUNICATION REGISTER
(RS2, RS1, RS0 = 0, 0, 0)
The communication register is an 8-bit register from which data
can be read or to which data can be written. All communication
to the part must start with a write operation to its communica-
tion register. The data written to the communication register
determines whether the next operation is a read or write
operation and to which register this operation takes place. After
the read or write operation is complete, the interface returns to
its default state, where it expects a write operation to the
communication register. In situations where the interface
sequence is lost, a write operation of a least 32 serial clock
cycles with DIN high returns the ADC to its default state by
resetting the part. Table 10 outlines the bit designations for the
communication register.
Table 9. Communication Register
0/DRDY (0)
RS2 (0)
RS1 (0)
RS0 (0)
R/W (0)
STBY (0)
CH1 (0)
CH0 (0)
Table 10. Communication Register Bit Description
Register
Description
0/DRDY
For a write operation to the communications register, a 0 must be written to this bit. If a 1 is written to this bit, the part does
not clock subsequent bits into the register. It stays at this bit location until a 0 is written. Then, the next seven bits are loaded
into the communication register. For a read operation, this bit provides the status of the DRDY flag, which is the same as the
DRDY output pin.
RS2–RS0
Register Selection Bits. These bits are used to select which of the AD7705/AD7706 registers are being accessed during the
serial interface communication.
R/W
Read/WRITE Select. This bit selects whether the next operation is a read or write operation. A 0 indicates a write cycle for the
next operation to the selected register, and a 1 indicates a read operation from the selected register.
STBY
Standby. Writing 1 to this bit puts the part into standby or power-down mode. In this mode, the part consumes only 10 μA of
power supply current. The part retains its calibration coefficients and control word information when in standby. Writing 0 to
this bit places the parts in normal operating mode.
CH1, CH0
Channel Select. These two bits select a channel for conversion or for access to the calibration coefficients, as outlined in
Table 12. Following a calibration on a channel, three pairs of calibration registers store the calibration coefficients. Table 12
(for the AD7705) and Table 13 (for the AD7706) show which channel combinations have independent calibration coefficients.
With CH1 at Logic 1 and CH0 at Logic 0, the AD7705 looks at the AIN1() input internally shorted to itself, while the AD7706 looks
at the COMMON input internally shorted to itself. This can be used as a test method to evaluate the noise performance of the
parts with no external noise sources. In this mode, the AIN1()/COMMON input should be connected to an external voltage
within the allowable common-mode range for the parts.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| D38999/26MC8SNLC | CONN HSG PLUG 8POS STRGHT SCKT |
| D38999/20JD97AA | CONN HSG RCPT 12POS WALL MT PINS |
| MS27468T11A35P | CONN RCPT 13POS JAM NUT W/PINS |
| AD7705BR-REEL | IC ADC 16BIT 2CH 16-SOIC T/R |
| MS27467E25B29A | CONN HSG PLUG 29POS STRGHT PINS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7705BRUZ | 功能描述:IC ADC 16BIT 2CH 16-TSSOP 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(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7705BRUZ | 制造商:Analog Devices 功能描述:IC 制造商:Analog Devices 功能描述:IC, ADC, 16BIT, 500SPS, TSSOP-16 |
| AD7705BRUZ | 制造商:Analog Devices 功能描述:ADC 2CH 16BIT SIG DEL 16TSSOP |
| AD7705BRUZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs |
| AD7705BRUZ-REEL | 功能描述:IC ADC 16BIT 2CHANAN 16TSSOP 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(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。