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參數資料
| 型號： | ADS1194CZXGT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBGA64 |
| 封裝： | 8 X 8 MM, GREEN, PLASTIC, NFBGA-64 |
| 文件頁數： | 19/76頁 |
| 文件大?。?/td> | 1193K |
| 代理商： | ADS1194CZXGT |
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SBAS471B
– APRIL 2010 – REVISED APRIL 2011
CLOCK
The ADS1194/6/8 provide two different methods for device clocking: internal and external. Internal clocking is
ideally suited for low-power, battery-powered systems. The internal oscillator is trimmed for accuracy at room
temperature. Over the specified temperature range the accuracy varies; see the Electrical Characteristics. Clock
selection is controlled by the CLKSEL pin and the CLK_EN register bit.
The CLKSEL pin selects either the internal or external clock. The CLK_EN bit in the CONFIG1 register enables
and disables the oscillator clock to be output in the CLK pin. A truth table for these two pins is shown in Table 5.
The CLK_EN bit is useful when multiple devices are used in a daisy-chain configuration. It is recommended that
during power-down the external clock be shut down to save power.
Table 5. CLKSEL Pin and CLK_EN Bit
CONFIG1.CLK_EN
CLKSEL PIN
BIT
CLOCK SOURCE
CLK PIN STATUS
0
X
External clock
Input: external clock
1
0
Internal clock oscillator
3-state
1
Internal clock oscillator
Output: internal clock oscillator
DATA FORMAT
The ADS1194/6/8 outputs 16 bits of data per channel in binary twos complement format, MSB first. The LSB has
a weight of VREF/(2
15 – 1). A positive full-scale input produces an output code of 7FFFh and the negative
full-scale input produces an output code of 8000h. The output clips at these codes for signals exceeding
full-scale. Table 6 summarizes the ideal output codes for different input signals.
Table 6. Ideal Input Code versus Input Signal(1)
INPUT SIGNAL, VIN
(AINP
– AINN)
IDEAL OUTPUT CODE(2)
≥ VREF
7FFFh
+VREF/(2
15 – 1)
0001h
0
0000h
–VREF/(2
15 – 1)
FFFFh
≤ –VREF (2
15/215 – 1)
8000h
(1)
Assumes gain = 1.
(2)
Excludes effects of noise, linearity, offset, and gain error.
26
Copyright
2010–2011, Texas Instruments Incorporated
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| ADS1196CPAG | 功能描述:模數轉換器 - ADC Low-Pwr6Ch16B Ana Front-End for ECG RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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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