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參數(shù)資料
| 型號： | AD7660ACPZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT UNIPOLAR 48LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 100k |
| 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）： | 25mW |
| 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-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 48-LFCSP-VQ（7x7） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 輸入數(shù)目和類型： | 2 個偽差分，單極 |
| 其它名稱： | AD7660ACPZRLDKR |
REV. D
AD7660
–10–
CIRCUIT INFORMATION
The AD7660 is a fast, low power, single-supply, precise 16-bit
analog-to-digital converter (ADC). The AD7660 is capable of
converting 100,000 samples per second (100 kSPS) and allows
power saving between conversions. When operating at 100 SPS,
for example, it consumes typically only 21
mW. This feature
makes the AD7660 ideal for battery-powered applications.
The AD7660 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.
The AD7660 can be operated from a single 5 V supply and 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 com-
bines space savings and allows flexible configurations as either
serial or parallel interface. The AD7660 is pin-to-pin compatible
with the AD7664.
CONVERTER OPERATION
The AD7660 is a successive-approximation analog-to-digital
converter based on a charge redistribution DAC. Figure 3 shows
the simplified schematic of the ADC. 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 analog
input IN. Thus, the capacitor array is used as a sampling capaci-
tor and acquires the analog signal on IN input. Similarly, the
dummy capacitor acquires the analog signal on the INGND input.
When the acquisition phase is complete and the
CNVST input
goes or is LOW, a conversion phase is initiated. When the con-
version 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. There-
fore, the differential voltage between IN 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/65536). The control logic toggles
these switches, starting with the MSB first, in order to bring the
comparator back into a balanced condition. After the comple-
tion of this process, the control logic generates the ADC output
code and brings BUSY output LOW.
SWA
COMP
SWB
IN
REF
REFGND
LSB
MSB
32768C
INGND
16384C
4C
2C
C
65536C
CONTROL
LOGIC
SWITCHES
CONTROL
BUSY
OUTPUT
CODE
CNVST
C
Figure 3. ADC Simplified Schematic
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7660AST | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 16-bit Parallel/Serial 48-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:16-BIT, 100KSPS CMOS ADC - Bulk 制造商:Analog Devices 功能描述:Digital-Analog Converter IC Interface Ty |
| AD7660ASTRL | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 16-bit Parallel/Serial 48-Pin LQFP T/R |
| AD7660ASTRLZ | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 16-bit Parallel/Serial 48-Pin LQFP T/R |
| AD7660ASTZ | 功能描述:IC ADC 16BIT UNIPOLAR 48-LQFP 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 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 |
| AD7660ASTZ | 制造商:Analog Devices 功能描述:IC 16-BIT ADC |
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