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參數(shù)資料
| 型號： | AD7859BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 7/28頁 |
| 文件大?。?/td> | 535K |
| 代理商： | AD7859BS |
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AD7859/AD7859L
REV. A
–7–
PIN FUNCTION DESCRIPTION
Mnemonic
Description
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
.
Read Input. Active low logic input. Used in conjunction with
CS
to read from internal registers.
Write Input. Active low logic input. Used in conjunction with
CS
to write to internal registers.
Chip Select Input. Active low logic input. The device is selected when this input is active.
Reference Input/Output. This pin is connected to the internal reference through a series resistor and is the
reference source for the analog-to-digital converter. The nominal reference voltage is 2.5 V and this appears at the
pin. This 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 Supply Voltage, +3.0 V to +5.5 V.
Analog Ground. Ground reference for track/hold, reference and DAC.
Digital Supply Voltage, +3.0 V to +5.5 V.
Digital Ground. Ground reference point for digital circuitry.
Reference Capacitor (0.1
μ
F multilayer ceramic). This external capacitor is used as a charge source for the inter-
nal DAC. The capacitor should be tied between the pin and AGND.
Reference Capacitor (0.01
μ
F ceramic disc). This external capacitor is used in conjunction with the on-chip refer-
ence. The capacitor should be tied between the pin and AGND.
Analog Inputs. Eight analog inputs which can be used as eight single ended inputs (referenced to AGND) or four
pseudo differential inputs. Channel configuration is selected by writing to the control register. None of the inputs
can go below AGND or above AV
DD
at any time. See Table III for channel selection.
Word/Byte input. When this input is at a logic 1, data is transferred to and from the AD7859/AD7859L in 16-bit
words on pins DB0 to DB15. When this pin is at a Logic 0, byte transfer mode is enabled. Data is transferred on
pins DB0 to DB7 and pin DB8/HBEN assumes its HBEN functionality.
Data Bits 0 to 7. Three state data I/O pins that are controlled by
CS
,
RD
and
WR
. Data output is straight binary
(unipolar mode) or twos complement (bipolar mode).
Data Bit 8/High Byte Enable. When W/
B
is high, this pin acts as Data Bit 7, a three state data I/O pin that is con-
trolled by
CS
,
RD
and
WR
. When W/
B
is low, this pin acts as the High Byte Enable pin. When HBEN is low,
then the low byte of data being written to or read from the AD7859/AD7859L is on DB0 to DB7. When HBEN
is high, then the high byte of data being written to or read from the AD7859/AD7859L is on DB0 to DB7.
Data Bits 9 to 15. Three state data I/O pins that are controlled by
CS
,
RD
and
WR
. Data output is straight bi-
nary (unipolar mode) or twos complement (bipolar mode).
Master Clock Signal for the device (4 MHz for AD7859, 1.8 MHz for AD7859L). Sets the conversion and calibra-
tion times.
Calibration Input. A logic 0 in this pin resets all logic. A rising edge on this pin initiates a calibration. This input
overrides all other internal operations.
Busy Output. The busy output is triggered high when a conversion or a calibration is initiated, and remains high
until the conversion or calibration is completed.
Sleep Input. This pin is used in conjunction with the PGMT0 and PGMT1 bits in the control register to deter-
mine the power-down mode. Please see the “Power-Down Options” section for details.
No connect pins. These pins should be left unconnected.
RD
WR
CS
REF
IN
/
REF
OUT
AV
DD
AGND
DV
DD
DGND
C
REF1
C
REF2
AIN1–AIN8
W/
B
DB0–DB7
DB8/HBEN
DB9–DB15
CLKIN
CAL
BUSY
SLEEP
NC
相關PDF資料 |
PDF描述 |
|---|---|
| AD7859L* | 5V Low Power RS232 Transceiver; Package: PDIP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| AD7859LAS | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| AD7859L | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs(單電源,200kSPS 8通道12位采樣A/D轉換器) |
| AD7859 | 3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs(單電源,200kSPS 8通道12位采樣A/D轉換器) |
| AD7861AP | 11-Bit Resolution Simultaneous Sampling A/D Converter |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7859BSZ | 功能描述:IC ADC 12BIT 8CHAN LP 44-MQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 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） 供應商設備封裝: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 |
| AD7859L | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADCs |
| AD7859LAS | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel 44-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:12-BIT 8 CH.PARALLEL 100 KSPS I.C. - Bulk 制造商:Analog Devices 功能描述:IC 12-BIT ADC |
| AD7859LAS3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V to 5 V Single Supply, 200 kSPS8-Channel, 12-Bit Sampling ADCs |
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