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參數(shù)資料
| 型號(hào)： | ADS7863 |
| 英文描述： | Dual, 1.5MSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 雙路，1.5Msps的，12位，2通道，同步采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 23/30頁(yè) |
| 文件大?。?/td> | 637K |
| 代理商： | ADS7863 |
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P
Power-Down
(Not ADS7861-Compatible)
Modes
and
Reset
ADS7863
SBAS383–JUNE 2007
In
nap power-down mode,
the ADS7863 turns off
the biasing of the comparator and the mid-voltage
buffer. In this mode, power dissipation reduces to
approximately 0.3mA within 200ns. The device goes
into
nap
power-down
mode
conversion state.
The
power-down feature. There are three power-down
modes: deep power-down, nap power-down, and
auto-nap power-down. All three power-down modes
are activated with the 12th falling CLOCK edge of
the SDI access, during which the related bit asserts
(DP = '1', N = '1', or AN = '1'). All modes are
deactivated by de-asserting the respective bit in the
SDI Register. Contents of the SDI Register are not
affected by any of the power-down modes. Any
ongoing conversion
aborts
power-down is initiated.
Table 8
lists the differences
among the three power-down modes.
ADS7863
has
a
comprehensive
built-in
regardless
of
the
The
auto-nap power-down mode
is almost identical
to the nap mode. The only difference is the time
required to power down and the method of waking
up the device. The SDI Register bit AN is only used
to enable/disable this feature. If the auto-nap mode
is enabled, the ADS7863 turns off the biasing
automatically after finishing a conversion; thus, the
end of conversion actually activates the auto-nap
power-down. Device power dissipation reduces to
about 0.3mA within 200ns in this mode, as well.
Triggering a new conversion by applying a CONVST
pulse puts the device back into normal operation.
when
deep
or
nap
In
deep power-down mode,
all functional blocks
except the digital interface are disabled. The analog
block has its bias currents and the internal oscillator
turned off. In this mode, the power dissipation
reduces to 1
μ
A within 2
μ
s. The wake-up time from
deep power-down mode is 1
μ
s.
To issue a
device reset
, an RD pulse must be
generated along with an SDI word containing A[2:0]
= '101'. With the 12th falling edge after generating
the RD pulse, the entire device—including the serial
interface—is forced into reset. After approximately
20ns, the serial interface becomes active again.
Table 8. Power-Down Modes
POWER-
DOWN TYPE
Deep
Nap
POWER
DISSIPATION
1
μ
A
300
μ
A
ENABLED
BY
DP = ‘1’
N = ‘1’
ACTIVATED
BY
12th clock
12th clock
Each end of
conversion
ACTIVATION
TIME
2
μ
s
200ns
RESUMED
BY
DP = ‘0’
N = ‘0’
REACTIVATION
TIME
1
μ
s
3 clocks
DISABLED
BY
DP = ‘0’
N = ‘0’
Auto-nap
300
μ
A
AN = ‘1’
200ns
CONVST pulse
3 clocks
AN = ‘0’
23
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS7863I | Dual, 1.5MSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7863IDBQ | Dual, 1.5MSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7863IDBQR | Dual, 1.5MSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7863_08 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Dual, 2MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7863ADBQ | 功能描述:ANALOG TO DIGITAL CONVERTERS - A 制造商:texas instruments 系列:* 包裝:管件 零件狀態(tài):在售 封裝/外殼:24-SSOP（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:24-SSOP 標(biāo)準(zhǔn)包裝:50 |
| ADS7863ADBQR | 制造商:Texas Instruments 功能描述:IC ADC 12BIT SER 2M 24QSOP |
| ADS7863ARGER | 功能描述:ANALOG TO DIGITAL CONVERTERS - A 制造商:texas instruments 系列:* 包裝:帶卷（TR） 零件狀態(tài):在售 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商器件封裝:24-VQFN（4x4） 標(biāo)準(zhǔn)包裝:3,000 |
| ADS7863ARGET | 制造商:Texas Instruments 功能描述:IC ADC 12BIT DUAL 2MSPS 24-VQFN |
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