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參數(shù)資料
| 型號(hào)： | AD7490BRUZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT 16CH 1MSPS 28TSSOP |
| 產(chǎn)品變化通告： | IDD Specification Change 17/Jun/2009 |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 12.5mW |
| 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： | 28-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 16 個(gè)單端，單極 |
| 產(chǎn)品目錄頁面： | 778 (CN2011-ZH PDF) |
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Data Sheet
AD7490
Rev. D | Page 13 of 28
Table 7. Channel Selection
ADD3
ADD2
ADD1
ADD0
Analog Input Channel
0
VIN0
0
1
VIN1
0
1
0
VIN2
0
1
VIN3
0
1
0
VIN4
0
1
0
1
VIN5
0
1
0
VIN6
0
1
VIN7
1
0
VIN8
1
0
1
VIN9
1
0
1
0
VIN10
1
0
1
VIN11
1
0
VIN12
1
0
1
VIN13
1
0
VIN14
1
VIN15
Table 8. Power Mode Selection
PM1
PM0
Mode
1
Normal operation. In this mode, the AD7490 remains in full power mode, regardless of the status of any of the logic inputs.
This mode allows the fastest possible throughput rate from the AD7490.
1
0
Full shutdown. In this mode, the AD7490 is in full shutdown mode, with all circuitry on the AD7490 powering down. The
AD7490 retains the information in the control register while in full shutdown. The part remains in full shutdown until these
bits are changed in the control register.
0
1
Auto shutdown. In this mode, the AD7490 automatically enters shutdown mode at the end of each conversion when the
control register is updated. Wake-up time from shutdown is 1 s, and the user should ensure that 1 s has elapsed before
attempting to perform a valid conversion on the part in this mode.
0
Auto standby. In this standby mode, portions of the AD7490 are powered down, but the on-chip bias generator remains
powered up. This mode is similar to auto shutdown and allows the part to power up within one dummy cycle, that is, 1 s
with a 20 MHz SCLK.
Sequencer Operation
The configuration of the SEQ and SHADOW bits in the control register allows the user to select a particular mode of operation of the
sequencer function. Table 9 outlines the four modes of operation of the sequencer.
Table 9. Sequence Selection
SEQ
SHADOW
Sequence Type
0
This configuration means the sequence function is not used. The analog input channel selected for each individual
conversion is determined by the contents of the channel address bits ADD0 through ADD3 in each prior write
operation. This mode of operation reflects the normal operation of a multichannel ADC, without the sequencer
function being used, where each write to the AD7490 selects the next channel for conversion (see Figure 12).
0
1
This configuration selects the Shadow register for programming. After the write to the control register, the following
write operation loads the contents of the Shadow register. This programs the sequence of channels to be converted on
continuously with each successive valid CS falling edge (see Shadow register, Table 10 and Figure 13). The channels
selected need not be consecutive.
1
0
If the SEQ and SHADOW bits are set in this way, the sequence function is not interrupted upon completion of the write
operation. This allows other bits in the control register to be altered while in a sequence without terminating the cycle.
1
This configuration is used in conjunction with the ADD3 to ADD0 channel address bits to program continuous
conversions on a consecutive sequence of channels from Channel 0 through to a selected final channel, as determined
by the channel address bits in the control register (see Figure 14).
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| AD7490BRUZ-REEL | 功能描述:IC ADC 12BIT 16CHAN 28TSSOP 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:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| AD7490BRUZ-REEL7 | 功能描述:IC ADC 12BIT 16CHAN 28TSSOP 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:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| AD7490SRU-EP-RL7 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 16CH IC w/ Sequencer RoHS:否 制造商:Analog Devices 通道數(shù)量: 結(jié)構(gòu): 轉(zhuǎn)換速率: 分辨率: 輸入類型: 信噪比: 接口類型: 工作電源電壓: 最大工作溫度: 安裝風(fēng)格: 封裝 / 箱體: |
| AD7492 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Evaluation Board for 12-bit high speed, low power, successive-approximation ADC |
| AD7492_01 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1.25 MSPS, 16 mW Internal REF and CLK, 12-Bit Parallel ADC |
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