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參數(shù)資料
| 型號： | AD7663ASTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 3/24頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT CMOS 48-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | Power Line Monitoring |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 41mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 4 個單端，單極；4 個單端，雙極 |
| 產(chǎn)品目錄頁面： | 778 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7663CBZ-ND - BOARD EVALUATION FOR AD7663 |
REV. B
AD7663
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SAMPLING RATE – SPS
TPC 13. Operating Currents vs. Sample Rate
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WER-DO
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TING
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TEMPERATURE – C
DVDD
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TPC 14. Power-Down Operating Currents vs. Temperature
TEMPERATURE – C
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TPC 15. +FS, Offset, and –FS vs. Temperature
CIRCUIT INFORMATION
The AD7663 is a fast, low power, single-supply, precise 16-bit
analog-to-digital converter (ADC). The AD7663 is capable of
converting 250,000 samples per second (250 kSPS) and allows
power saving between conversions. When operating at 100 SPS,
for example, it consumes typically only 15 W. This feature
makes the AD7663 ideal for battery-powered applications.
The AD7663 provides the user with an on-chip track-and-hold,
successive approximation ADC that does not exhibit any pipeline
or latency, making it ideal for multiple multiplexed channel
applications.
It is specified to operate with both bipolar and unipolar input
ranges by changing the connection of its input resistive scaler.
The AD7663 can be operated from a single 5 V supply and can be
interfaced to either 5 V or 3 V digital logic. It is housed in a 48-lead
LQFP package or a 48-lead LFCSP package that combines space
savings and flexible configurations as either serial or parallel inter-
face. The AD7663 is pin-to-pin compatible with the AD7660.
CONVERTER OPERATION
The AD7663 is a successive approximation analog-to-digital
converter based on a charge redistribution DAC. Figure 3 shows
the simplified schematic of the ADC. The input analog signal is
first scaled down and level shifted by the internal input resistive
scaler, which allows both unipolar ranges (0 V to 2.5 V, 0 V to 5 V,
and 0 V to 10 V) and bipolar ranges (±2.5 V, ±5 V, and ±10 V).
The output voltage range of the resistive scaler is always 0 V to
2.5 V. The capacitive DAC consists of an array of 16 binary
weighted capacitors and an additional “LSB” capacitor. The
comparator’s negative input is connected to a “dummy” capacitor
of the same value as the capacitive DAC array.
During the acquisition phase, the common terminal of the array
tied to the comparator’s positive input is connected to AGND
via SWA. All independent switches are connected to the output
of the resistive scaler. Thus, the capacitor array is used as a
sampling capacitor and acquires the analog signal. Similarly, the
dummy capacitor acquires the analog signal on INGND input.
When the acquisition phase is complete and the
CNVST input
goes or is LOW, a conversion phase is initiated. When the conver-
sion phase begins, SWA and SWB are opened first. The capacitor
array and the dummy capacitor are then disconnected from the
inputs and connected to the REFGND input. Therefore, the differ-
ential voltage between the output of the resistive scaler and INGND
captured at the end of the acquisition phase is applied to the
comparator inputs, causing the comparator to become unbalanced.
By switching each element of the capacitor array between
REFGND or REF, the comparator input varies by binary
weighted voltage steps (VREF /2, VREF /4 . . .VREF /65,536). The
control logic toggles these switches, starting with the MSB first,
in order to bring the comparator back into a balanced condition.
After the completion of this process, the control logic generates
the ADC output code and brings the BUSY output LOW.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7663ASTZ | 制造商:Analog Devices 功能描述:IC, ADC, 16BIT, 250KSPS, LQFP-48 |
| AD7663ASTZRL | 功能描述:IC ADC 16BIT CMOS 48-LQFP T/R RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)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 |
| AD7663CB1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 250 kSPS CMOS ADC |
| AD7664 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 570 kSPS CMOS ADC |
| AD7664ACP | 制造商:Analog Devices 功能描述:ADC Single SAR 570ksps 16-bit Parallel/Serial 48-Pin LFCSP EP 制造商:Analog Devices 功能描述:ADC SGL SAR 570KSPS 16BIT PARALLEL/SERL 48LFCSP EP - Trays 制造商:Rochester Electronics LLC 功能描述:16-BIT, 500KSPS CMOS ADC - Bulk |
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