- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373920 > AD7851KN (ANALOG DEVICES INC) 14-Bit 333 kSPS Serial A/D Converter PDF資料下載
參數(shù)資料
| 型號： | AD7851KN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 14-Bit 333 kSPS Serial A/D Converter |
| 中文描述： | 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24 |
| 封裝： | 0.300 INCH, PLASTIC, MO-095AG, DIP-24 |
| 文件頁數(shù)： | 8/36頁 |
| 文件大小： | 435K |
| 代理商： | AD7851KN |
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
AD7851
–8–
REV. A
PIN FUNCT ION DE SCRIPT ION
Pin
Mnemonic
Description
1
CONVST
Convert Start. Logic input. A low to high transition on this input puts the track/hold into its hold mode and
starts conversion. When this input is not used, it should be tied to DV
DD
.
Busy Output. T he busy output is triggered high by the falling edge of
CONVST
or rising edge of
CAL
, and
remains high until conversion is completed. BUSY is also used to indicate when the AD7851 has completed
its on-chip calibration sequence.
Sleep Input/Low Power Mode. A logic 0 initiates a sleep and all circuitry is powered down including the in-
ternal voltage reference provided there is no conversion or calibration being performed. Calibration data is
retained. A logic 1 results in normal operation. See Power-Down section for more details.
Reference Input/Output. T his pin is connected to the internal reference through a series resistor and is the
reference source for the analog-to-digital converter. T he nominal reference voltage is 4.096 V and this ap-
pears at the pin. T his pin can be overdriven by an external reference or can be taken as high as AV
DD
.
When this pin is tied to AV
DD
, then the C
REF1
pin should also be tied to AV
DD
.
Analog Positive Supply Voltage, +5.0 V
±
5%.
Analog Ground. Ground reference for track/hold, reference and DAC.
Reference Capacitor (0.01
μ
F ceramic disc in parallel with a 470 nF NPO type). T his external capacitor is
used as a charge source for the internal DAC. T he capacitor should be tied between the pin and AGND.
Reference Capacitor (0.01
μ
F ceramic disc in parallel with a 470 nF NPO type). T his external capacitor is
used in conjunction with the on-chip reference. T he capacitor should be tied between the pin and AGND.
Analog Input. Positive input of the pseudo-differential analog input. Cannot go below AGND or above
AV
DD
at any time, and cannot go below AIN(–) when the unipolar input range is selected.
Analog Input. Negative input of the pseudo-differential analog input. Cannot go below AGND or above
AV
DD
at any time.
No Connect Pin.
Analog Mode Pin. T his pin allows two different analog input ranges to be selected. A logic 0 selects range 0
to V
REF
(i.e., AIN(+) – AIN(–) = 0 to V
REF
). In this case AIN(+) cannot go below AIN(–) and
AIN(–) cannot go below AGND. A logic 1 selects range –V
REF
/2 to +V
REF
/2 (i.e., AIN(+) – AIN(–) =
–V
REF
/2 to +V
REF
/2). In this case AIN(+) cannot go below AGND so that AIN(–) needs to be biased to
+V
REF
/2 to allow AIN(+) to go from 0 V to +V
REF
V.
Serial Clock Polarity. T his pin determines the active edge of the serial clock (SCLK ). T oggling this pin will
reverse the active edge of the serial clock (SCLK ). A logic 1 means that the serial clock (SCLK ) idles high
and a logic 0 means that the serial clock (SCLK ) idles low. It is best to refer to the timing diagrams and
T able X for the SCLK active edges.
Serial Mode Select Pin. T his pin is used in conjunction with the SM2 pin to give different modes of opera-
tion as described in T able X I.
Serial Mode Select Pin. T his pin is used in conjunction with the SM1 pin to give different modes of opera-
tion as described in T able X I.
Calibration Input. T his pin has an internal pull-up current source of 0.15
μ
A. A logic 0 on this pin resets all
logic and initiates a calibration on its rising edge. T here is the option of connecting a 10nF capacitor from
this pin to AGND to allow for an automatic self calibration on power-up. T his input overrides all other
internal operations.
Digital Supply Voltage, +5.0 V
±
5%.
Digital Ground. Ground reference point for digital circuitry.
Serial Data Output. T he data output is supplied to this pin as a 16-bit serial word.
Serial Data Input. T he data to be written is applied to this pin in serial form (16-bit word). T his pin can act
as an input pin or as a I/O pin depending on the serial interface mode the part is in (see T able X I).
Master Clock Signal for the device (6 MHz or 7 MHz). Sets the conversion and calibration times.
Serial Port Clock. Logic input/output. T he SCLK pin is configured as an input or output, dependent on the
type of serial data transmission (self-clocking or external-clocking) that has been selected by the SM1 and
SM2 pins. T he SCLK idles high or low depending on the state of the POLARIT Y pin.
T his pin can be an input level triggered active low (similar to a chip select in one case and to a frame sync
in the other) or an output (similar to a frame sync) pin depending on SM1, SM2 (see T able X I
)
.
2
BUSY
3
SLEEP
4
REF
IN
/
REF
OUT
5
6, 12 AGND
7
C
REF1
AV
DD
8
C
REF2
9
AIN(+)
10
AIN(–)
11
13
NC
AMODE
14
POLARIT Y
15
SM1
16
SM2
17
CAL
18
19
20
21
DV
DD
DGND
DOUT
DIN
22
23
CLK IN
SCLK
24
SYNC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7851KR | 14-Bit 333 kSPS Serial A/D Converter |
| AD7853LARS | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7853L* | Single Supply V.35 Transceiver; Package: SO; No of Pins: 28; Temperature Range: -40°C to +85°C |
| AD7853L | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs(單電源,200kSPS 12位采樣A/D轉(zhuǎn)換器) |
| AD7853 | 3 V to 5 V Single Supply, 200 KSPS 12-Bit Sampling ADCs(單電源,200kSPS 12位采樣A/D轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7851KNZ | 功能描述:IC ADC 14BIT SRL 333KSPS 24-DIP 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 |
| AD7851KR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD7851KR-REEL | 制造商:Analog Devices 功能描述: |
| AD7851KRZ | 功能描述:IC ADC 14BIT SRL 333KSPS 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 |
| AD7851KRZ3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。