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參數(shù)資料
| 型號： | ADS8380 |
| 英文描述： | 18-BIT, 600-kHz, PSEUDO-DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE |
| 中文描述： | 18位，600千赫，偽差分輸入，微采樣模數(shù)位串行接口和參考轉(zhuǎn)爐 |
| 文件頁數(shù)： | 23/29頁 |
| 文件大小： | 1397K |
| 代理商： | ADS8380 |
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READING DATA
The ADS8380 offers a high speed serial interface that is compatible with the SPI protocol. The device outputs
data in either 2's complement format or straight binary format depending on the state of the SB/2C pin. Refer to
Table 1 for the ideal output codes.
POWER SAVING
The converter provides two power saving modes, full power down and nap. Refer to Table 2 for information on
activation/deactivation and resumption time for both modes.
FULL POWER-DOWN MODE
Full power-down mode is activated by turning off the supply or by asserting PD to 1. See Figure 53 and
Figure 54. The device can be resumed from full power down by either turning on the power supply or by
de-asserting the PD pin. The first two conversions produce inaccurate results because during this period the
device loads its trim values to ensure the specified accuracy.
ADS8380
SLAS387A–NOVEMBER 2004–REVISED DECEMBER 2004
DIGITAL INTERFACE (continued)
Table 1. Input Voltages and Ideal Output Codes
DESCRIPTION
Full-scale range
Least significant bit
(LSB)
Full scale
Mid scale
Mid scale – 1 LSB
0
ANALOG VALUE +IN – (–IN)
(+V
REF
)
(+V
REF
)/2
18
DIGITAL OUTPUT (HEXADECIMAL)
SB/2C Pin = 0
SB/2c Pin = 1
V
REF
– 1 LSB
(+V
REF
)/2
(+V
REF
)/2 – 1 LSB
0
3FFFF
20000
1FFFF
00000
1FFFF
00000
3FFFF
20000
To avoid performance degradation due to the toggling of device buffers, read operation must not be performed in
the specified quiet zones (t
, t
, and t
). Internal to the device, the previously converted data is updated
with the new data near the fall of BUSY. Hence, the fall of CS and the fall of FS around the fall of BUSY is
constrained. This is specified by t
su2
, t
su3
, t
h2
, and t
h8
in the timing requirements table.
Table 2. Power Save
POWER
CONSUMPTION
TYPE OF POWER DOWN
SDO
ACTIVATED BY
ACTIVATION TIME (t
d16
)
RESUME POWER BY
Normal operation
Not 3 stated
22 mA
NA
NA
NA
Full power down
(Int Ref, 1-μF capacitor on REFOUT pin)
3 Stated (t
d10
timing)
2 μA
PD = 1
10 μs
PD = 0
Full power down
(Ext Ref, 1-μF capacitor on REFOUT pin)
3 Stated (t
d10
timing)
2 μA
PD = 1
10 μs
PD = 0
At EOC and
CONVST_QUAL = 0
Nap power down
Not 3 stated
3 mA
200 ns
Sample Start command
If an internal reference is used (with a 1-μF capacitor installed between the REFOUT and REFM pins), the total
resume time (t
d18
) is 25 ms. After the first two conversions, t
d17
(4 ms) is required for the trimmed internal
reference voltage to settle to the specified accuracy. Only then the converted results match the specified
accuracy.
23
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS8380EVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS8380 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS8380IBRHPR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS Serial RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8380IBRHPRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS Serial RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8380IBRHPT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS Serial RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8380IBRHPTG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS Serial RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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