參數(shù)資料
型號： ADS1194CZXGT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PBGA64
封裝： 8 X 8 MM, GREEN, PLASTIC, NFBGA-64
文件頁數(shù)： 15/76頁
文件大?。?/td> 1193K
代理商： ADS1194CZXGT
Max(INP
INN)<
-
V
REF
Gain
Full-ScaleRange=
±
V
REF
Gain
;
60
70
80
90
100
110
120
130
140
150
-
NormalizedFrequency(Hz)
P
ower
-SupplyDensity(dB)
10
1
10
2
10
0
10
3
SBAS471B
– APRIL 2010 – REVISED APRIL 2011
Input Differential Dynamic Range
The differential (INP
– INN) signal range depends on the analog supply and reference used in the system. This
range is shown in Equation 3.
(3)
The 3V supply, with a reference of 2.4V and a gain of 6 for ECGs, is optimized for power with a differential input
signal of approximately 300mV. For higher dynamic range, a 5V supply with a reference of 4V (set by the
VREF_4V bit of the CONFIG3 register) can be used to increase the differential dynamic range.
ADC
ΔΣ Modulator
Each channel of the ADS1194/6/8 has a 16-bit
ΔΣ ADC. This converter uses a second-order modulator
optimized for low-power applications. The modulator samples the input signal at the rate of fMOD = fCLK/8. As in
the case of any
ΔΣ modulator, the noise of the ADS1194/6/8 is shaped until fMOD/2, as shown in Figure 20. The
on-chip digital decimation filters explained in the next section can be used to filter out the noise at higher
frequencies. These on-chip decimation filters also provide antialias filtering. This feature of the
ΔΣ converters
drastically reduces the complexity of the analog antialiasing filters that are typically needed with nyquist ADCs.
Figure 20. Modulator Noise Spectrum Up To 0.5
× fMOD
22
Copyright
2010–2011, Texas Instruments Incorporated
Product Folder Link(s): ADS1194 ADS1196 ADS1198
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS1194IPAG 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power 8-Channel 16-Bit Analog Front-End for Biopotential Measurements
ADS1194IPAGR 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power 8-Channel 16-Bit Analog Front-End for Biopotential Measurements
ADS1196 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements
ADS1196CPAG 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Pwr6Ch16B Ana Front-End for ECG 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
ADS1196CPAG 制造商:Texas Instruments 功能描述:; Resolution (Bits):16bit; Sampling Rate 制造商:Texas Instruments 功能描述:IC, ADC, 6CH, 16BIT, 8KSPS, TQFP-64
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