- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373896 > AD7278BUJ-REEL (ANALOG DEVICES INC) 3MSPS,12-/10-/8-Bit ADCs in 6-Lead TSOT PDF資料下載
參數(shù)資料
| 型號(hào)： | AD7278BUJ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 3MSPS,12-/10-/8-Bit ADCs in 6-Lead TSOT |
| 中文描述： | 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO6 |
| 封裝： | MO-193AA, TSOT-6 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 255K |
| 代理商： | AD7278BUJ-REEL |
–
13
–
REV. PrF
PRELIMINARY TECHNICAL DATA
Preliminary Technical Data
AD7276/AD7277/AD7278
CIRCUIT INFORMATION
The AD7276/AD7277/AD7278 are fast, micropower, 12-/
10-/8-Bit, single supply, A/D converters respectively. The
parts can be operated from a +2.35V to +3.6V supply.
When operated from any supply voltage within this range,
the AD7276/AD7277/AD7278 are capable of throughput
rates of 3 MSPS when provided with a 52 MHz clock.
The AD7276/AD7277/AD7278 provide the user with an
on-chip track/hold, A/D converter, and a serial interface
housed in a tiny 6-lead TSOT or 8-lead MSOP package,
which offers the user considerable space saving advantages
over alternative solutions. The serial clock input accesses
data from the part but also provides the clock source for
the successive-approximation A/D converter. The analog
input range is 0 to V
DD
. An external reference is not
required for the ADC and neither is there a reference on-
chip. The reference for the AD7276/AD7277/AD7278 is
derived from the power supply and thus gives the widest
dynamic input range.
The AD7276/AD7277/AD7278 also feature a power down
option to allow power saving between conversions. The
Power-Down feature is implemented across the standard
serial interface as described in the Modes of Operation
section.
CONVERTER OPERATION
The AD7276/AD7277/AD7278 is a successive-
approximation analog-to-digital converter based around a
charge redistribution DAC. Figures 7 and 8 show
simplified schematics of the ADC. Figure 7 shows the
ADC during its acquisition phase. SW2 is closed and SW1
is in position A, the comparator is held in a balanced
condition and the sampling capacitor acquires the signal on
V
IN
.
When the ADC starts a conversion, see Figure 8, SW2
will open and SW1 will move to position B causing the
comparator to become unbalanced. The Control Logic
and the Charge Redistribution DAC are used to add and
subtract fixed amounts of charge from the sampling ca-
pacitor to bring the comparator back into a balanced con-
dition. When the comparator is rebalanced the conversion
is complete. The Control Logic generates the ADC out-
put code. Figure 9 shows the ADC transfer function.
Figure 7. ADC Acquisition Phase
CHARGE
REDISTRIBUTION
DAC
VIN
VDD / 2
SAMPLING
CAPACITOR
COMPARATOR
CONTROL
LOGIC
ACQUISITION
PHASE
SW1
A
B
SW2
AGND
ADC TRANSFER FUNCTION
The output coding of the AD7276/AD7277/AD7278 is
straight binary. The designed code transitions occur
midway between succesive integer LSB values, i.e,
0.5LSB, 1.5LSBs, etc. The LSB size is V
DD
/4096 for the
AD7276, V
DD
/1024 for the AD7277 and V
DD
/256 for the
AD7278. The ideal transfer characteristic for the AD7276/
AD7277/AD7278 is shown in Figure 9.
Figure 8. ADC Conversion Phase
CHARGE
REDISTRIBUTION
DAC
VIN
VDD / 2
SAMPLING
CAPACITOR
COMPARATOR
CONTROL
LOGIC
CONVERSION
PHASE
SW1
A
B
SW2
AGND
Figure 9. AD7276/AD7277/AD7278 Transfer Characteristic
000...000
0V
A
ANALOG INPUT
111...111
111...110
000...001
000...010
111...000
011...111
0.5LSB
+VDD-1.5LSB
1LSB = VDD/1024 (AD7277)
1LSB = VDD/256 (AD7278)
1LSB = VDD/4096 (AD7276)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7302BN | ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84% |
| AD7302BR | 2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC |
| AD7302BRU | 2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC |
| AD7302 | Parallel Input Dual Voltage Output 8-Bit DAC(串行輸入,電壓輸出雙8位D/A轉(zhuǎn)換器) |
| AD7303 | ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7278BUJZ-500RL7 | 功能描述:IC ADC 8BIT 3MSPS HS LP TSOT23-6 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(gè)單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7278BUJZ-REEL7 | 功能描述:IC ADC 8BIT 3MSPS HS LP TSOT23-6 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 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:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7280 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Lithium Ion Battery Monitoring System |
| AD7280A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Lithium Ion Battery Monitoring System Cell balancing interface |
| AD7280ABSTZ | 功能描述:IC BATT MONITOR LI-ION 48LQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。