ADS1298中文版手册(TI的标准Datasheet)

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ADS1298中文版使用手册,TI的标准Datasheet。介绍了此芯片的基本参数,以及编程的基本方法
ADS1294. ADS1294R lEXAS INSTRUMENTS ADS1296, ADS1296R ADS1298, ADS1298R www.tl.comcn ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 ELECTRICAL CHARACTERISTICS Minimum/maximum specifications apply for all commercial grade(0 c to +70C)devices and from-40C to +85 C for ndustrial grades devices. Typical specifications are at+25 C All specifications at DVDd=1.8V, AVDD-AVSS= 3V1) VREF =2.4V, external fclK =2.048MHZ, data rate= 500SPS, High-Resolution mode, and gain= 6, unless otherwise noted ADs1294,ADS1296;ADS1298 ADS1294R, ADS1296R. ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale differential input voltage(AINP-AINN) ±vRFF/GA|N See the Input Common-Mode Range Input common-mode range subsection of the PGa Settings and input Range section Input capacitance TA=+25°C, input=1.5V 200 Input bias current TA=0°cto+70°c, input=1.5V ±1 TA=-40C to +85C, input =1.5V ±1.2 nA No lead-off 1000 MQ DC input impedance Current source lead-off detection 500 Pull-up resistor lead-off detection 10 PGA PERFORMANCE Gain settings 1,2,3,4.6,8,12 Bandwidth See Table 16 ADC PERFORMANCE Data rates up to 8kSPs, no missing codes Resolulion 16ksPS data rate 32k SPS data rate 17 fcLK =2.048MHz, High-Resolution mode 32000 Data rate i fcLK=2.048MHZ, Low-Power mode 16000 CHANNEL PERFORMANCE DC Performance Gain=6(2). 10 seconds of data 4 Input-referred noise Gain =6, 256 points 0.5 seconds of data Gain settings other than 6, data rates other than 500SPs See Noise measurements section Full-scale with gain=6, best fit Full-scale with gain =6, best fit, Integral nonlinearity ADS1294R/6R/8R channel 1 40 ppm -20dBFS with gain =6, best fit, ADS1 294R/6R/8R channel Offsct error ±500 Offset error drift Gain error Excluding voltage reference error ±0.2 ±05%cfFS Gain drift Excluding voltage reference drift ppm/C Gain match between channels 0.3 %o of FS (1)Performance is applicable for 5v operation as well Production testing for limits is performed at 3V (2) Noise data measured in a 10-second interval Test not performed in production. Input-referred noise is calculated with input shorted (without electrode resistance )over a 10-second interva Copyright C 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R ADS1296. ADS1296R EXAS INSTRUMENTS ADS1298 ADS1298R ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 www.tl.comcn ELECTRICAL CHARACTERISTICS (continued Minimum/maximum specifications apply for all commercial grade(0 c to +70C)devices and from-40C to +85 C for ndustrial grades devices. Typical specifications are at +25 C. All specifications at DVDD=1.8V, AVDD- AVSS=3V(1) VREF =2.4V, external fclK =2.048MHZ, data rate= 500SPS, High-Resolution mode, and gain= 6, unless otherwise noted ADs1294,ADS1296;ADS1298 ADS1294R, ADS1296R. ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CHANNEL PERFORMANCE (continued) AC Performance Common-mode rejection ratio(CMRR) fM= 50Hz. 60Hzl3 105 115 Power-supply rejection ratio(PSRR) fps 50Hz, 60Hz Crosstalk fIN 50HZ, 60HZ 126 Signal-to-noise ratio (SNR) fin= 10Hz input, gain= 6 112 10Hz, -0.5dBF ADS1294R/6R/8R channel 1.10Hz. -0.5dBFs 70 100Hz,-0.5cBFs(4) 100 Total harmonic distortion(THD) ADS1294R/6R/8R channel 1. 100Hz - o. 5dbes ADS1294R/6R/8R channel1. 100Hz -20dBFs( 4) DIGITAL FILTER 3dB bandwidth 0.262DR Digital filter settling Full setting SIons RIGHT LEG DRIVE(RLD) AMPLIFIER AND PACE AMPLIFIERS RLD integrated noise BW=150Hz PACE integrated noise BW= 8kH PACE amplifier crosstalk Crosstalk between PACE amplifiers dB Gain bandwidth product 50kQ2 10pF load, gain =1 kHz Slew rate 50kQ 10pF load, gain =1 0.25 Short-circuit to GND (AVDD= 3V) 270 PACE and RLD amplifer drive strength short-circuit时D测 AAA Short-circuit to GND (AVDD=5V) 490 Short-circuit to supply (AVDD=5v) 810 A Peak swing(AVsS +0.3v to AVDD +0.3v) at AVdd= 3V PACE and Rld current Peak swing(AVSS +0.3v to AVDD +0.3v) at AVDD= 5v 75 PACE amplifier output resistance 100 Total harmonic distortion fIN =100Hz, gain=1 -70 Common-mode input range AVss +0.7 AVDD-0.3 Common-mode resistor matchine Internal 200kQ2 resistor matching 0.1 Short-circuit current ±0.25 mA Quiescent power consumption Either RLD or PACE amplifier 20 A VILSON CENTRAL TERMINAL WCT) AMPLIFIER Integrated noise BW= 150Hz See Table 6 nVIHZ Gain bandwidth product See Table 6 kHz Slew rate See Table 6 Total harmonic distortion fIN 100HZ Common-mode input range AVSS +0.3 Short-circuit current Through internal 30kQ2 resistol ±025 Quiescent power consumption See Table 6 (3) CMRR is measured with a common-mode signal of Avss+0.3v to AVDD-03v. The values indicated are the maximum of the eight channels (4) Harmonics above the second harmonic are attenuated by the digital filter Copyright@ 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R lEXAS INSTRUMENTS ADS1296, ADS1296R ADS1298, ADS1298R www.tl.comcn ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 ELECTRICAL CHARACTERISTICS (continued Minimum/maximum specifications apply for all commercial grade(0 c to +70C)devices and from-40C to +85 C for ndustrial grades devices. Typical specifications are at +25 C. All specifications at DVDD=1.8V, AVDD- AVSS=3V(1) VREF =2.4V, external fclK =2.048MHZ, data rate= 500SPS, High-Resolution mode, and gain= 6, unless otherwise noted ADs1294,ADS1296;ADS1298 ADS1294R, ADS1296R. ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LEAD-OFF DETECT Frequency See the Register Map section for settings 0, foR/ 4 KHz Current See the Register Map section for settings 6.12.18.24 nA Current accuracy ±20 Comparator threshold accuracy ±30 mv RESPIRATION (ADS1294R/6R/8R Only) Internal 32,64 kHz Frequency External source KHZ Phase shift See the Register Map section for settings 22.5 157.dEgrees Impedance rang RESP =30HA 0. 05Hz to 2Hz brick wall filter. 32KHz Impedance measurement noise modulation clock, phase = 112.5 using IREsP= 30uA with 2ko baseline load n =4 test conditio Modulator current internal reference, signal path =82kQ2 baseline 2.21ks EXTERNAL REFERENCE 3v supply VREF =(VREFP-VREFN) 2.5 V Reference input voltage 5V supply VREF =(VREFP-VREFN) 4.0 Negative input (VREFN) AVSS Positive input (VREFP) AVSS +2.5 Input impedance INTERNAL REFERENCE Register bit CONFIG3 VREF 4V=0 AVDD≥2.7V 2.4 V Output voltage Register bit CONFIG3 VREF 4V=1 AVDD≥4.4V VREF accuracy ±0.2 Internal reference drift Commerical grade,0°cto+70°C Industrial grade,-40°cto+85°C Start-up time ms SYSTEM MONITORS Analog supply reading Digital supply reading From power-up to DRDY low Device wake up STANDBY mode 9 Temperature sensor reading, voltage TA=+25C 145 mV Temperature sensor reading, coefficient 490 V°C Test signal Signal frequency See Register Map section for settings fCLK2, fcLK/2 Signal voltage See Register Map section for settings V Accuracy ±2 % Copyright C 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R ADS1296. ADS1296R EXAS INSTRUMENTS ADS1298 ADS1298R ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 www.tl.comcn ELECTRICAL CHARACTERISTICS (continued Minimum/maximum specifications apply for all commercial grade(0 c to +70C)devices and from-40C to +85 C for ndustrial grades devices. Typical specifications are at +25 C. All specifications at DVDD=1.8V, AVDD- AVSS=3V(1) VREF =2.4V, external fclK =2.048MHZ, data rate= 500SPS, High-Resolution mode, and gain= 6, unless otherwise noted ADs1294,ADS1296;ADS1298 ADS1294R, ADS1296R. ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CLOCK Internal oscillator clock frequency Nominal frequenc 2.048 Hz 25° ±05 Internal clock accuracy 0°C≤TA≤+70°C ±2 % -40°C≤T≤+85°C ADS1298l industrial grade version only % Internal oscillator start-up time Internal oscillator power cansumption External clock input frequency CLKSEL pin=0 1.94 2.048 2.25 DIGITAL INPUTOUTPUT(DVDD=1.65V to 3.6V Logic level O.8DVDD DD +0.1 -0.1 0.2DVDD V oH=-500μA DVDD-=.4 loL=+500μA 0.4 VVVVA Input current (IN) ov <VDigitallnput DVDD -10 +10 POWER-SUPPLY REQUIREMENTS Analog supply(AVDD-AVSS) 2.7 3.0 5.25 V Digital supply(DVDD) 1.65 18 3.6 AVDD- DVDD -2.1 SUPPLY CURRENT(RLD, WCT, and PACE Amplifiers Turned off) High-Resolution mode (ADS1298) AVDD- AVSS= 3V 2.75 m AVDD=AVSS=5V 3.1 DVDD =3.0V 0.5 AAAA DVDD=1.8V 0.3 Low-Power mode(ADS1298) AVDD-AVSS= 3V AVDD-AVSS=5V 2.1 DVDD=3.0V 0.5 DVDD=1.8V 0.3 mA POWER DISSIPATION (Analog Supply = 3V, RLD, WCT, and PAcE Amplifiers Turned Off) Quiescent power dissipation High-Resolution mode 8.8 9.5 mw ADS1298/8R Low-Power mode(250SPS) 6.0 7.0 High-Resolution mode 7.2 7.9 ADs1296/6R Low-Power mode 5.3 6.6 mW High-Resolution mode 5.4 W ADS1294/4R LoW-Power node 44 Power-down 10 Standby mode Quiescent channel power PGA ADC 818 Copyright@ 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R lEXAS INSTRUMENTS ADS1296, ADS1296R ADS1298, ADS1298R www.tl.comcn ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 ELECTRICAL CHARACTERISTICS (continued Minimum/maximum specifications apply for all commercial grade(0 c to +70C)devices and from-40C to +85 C for ndustrial grades devices. Typical specifications are at +25 C. All specifications at DVDD=1.8V, AVDD- AVSS=3V(1) VREF =2.4V, external fclK =2.048MHZ, data rate= 500SPS, High-Resolution mode, and gain= 6, unless otherwise noted ADs1294,ADS1296;ADS1298 ADS1294R, ADS1296R. ADS1298R PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWER DISSIPATION (Analog Supply =5V, RLD, WCT, and PACE Amplifiers Turned Off) Quiescent power dissipation High-Resolution mode 175 mw ADS1298/8R Low-Power mode 12.5 mw High-Resolution mode 14.1 mw ADS1296/6R Low-Power mode High-Resolution mode 10.1 ADS1294 4R Low-Power mode 8.3 mw Power-down μ Standby mode mW Quiescent channel powel PGA ADC 1.5 m TEMPERATURE Specified temperature 000 +70°c Operating temperature +70 Specified temperature rang (industrial grade only +85 Operating temperature range (industrial grade only) Storage temperature range +150 THERMAL INFORMATION ADs129468 ADs1294/618 4R/6R/8R THERMAL METRIC们) UNITS PAG ZXG 64 PINS 64 PINS Junction -to-ambient thermal resistance 35 48 00θu屮 Junction-to-case( top)thermal resistance 8 Junction -to-board thermal resistance Junction-to-top characterization paramete 0.1 0.5 B Junction -to-board characterization parameter jaBot Junction-to-case(bottom) thermal resistance (1)For more intormation about traditional and new thermal metrics, see the /c Package Thermal Metrics application report, SPRA953 Copyright C 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R ADS1296. ADS1296R EXAS INSTRUMENTS ADS1298 ADS1298R ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 www.tl.comcn NOISE MEASUREMENTS NOTE The ADs1294R/6R/8R channel performance differs from the ads 1294/6/8 in regards to respiration circuitry found on channel one. Unless otherwise noted, ADS129x refers to all specifications and functional descriptions of the ads1294, ADs1296, ADs1298 ADS1294R ADS1296R and ADs 1298R The ADs 129x noise performance can be optimized by adjusting the data rate and PGa setting. As the averaging is increased by reducing the data rate, the noise drops correspondingly. Increasing the PGA value reduces the input-referred noise, which is particularly useful when measuring low-level biopotential signals. Table 2 and able 3 summarize the noise performance of the ADS129x in the High-Resolution(HR)mode and Low-Power (LP)mode, respectively, with a 3V analog power supply. Table 4 and Table 5 summarize the noise performance of the ADs129x in the HR mode and LP mode, respectively, with a 5v analog power supply. The data are representative of typical noise performance at TA =+25C. The data shown are the result of averaging the readings from multiple devices and are measured with the inputs shorted together. a minimum of 1000 consecutive readings are used to calculate the RMs and peak-to-peak noise for each reading. For the two highest data rates, the noise is limited by quantization noise of the adc and does not have a gaussian distribution. Thus, the ratio between rms noise and peak-to-peak noise is approximately 10. For the lower data rates, the ratio is approximately 6.6 Table 2 to Table 5 show measurements taken with an internal reference. The data are also representative of the ADS 129x noise performance when using a low-noise external reference such as the ref5025 Table2. Input-Referred Noise(μVRMs小μVp) in high- Resolution mode 3V Analog Supply and 2. 4V Reference 1) DR BITS OF QUTPUT CoNFIG1 DATA RATE BANDWIDTH PGA PGA PGA PGA PGA PGA PGA REGISTER (SPS) GAIN E 1 GAIN =2 GAIN =3 GAIN= 4 GAIN 6 GAIN E 8 GAIN =12 000 32000 3353553 168/1701 112/1100 85/823 58/529 42.5/378 28.6248 16000 4193 56613 28/295 188/188 14.3/143 9.7194 7.4/69 010 8000 12.4/111 65/54 4.537.9 35/29.7 2.6/21.7 2.217.8 18/13.8 4000 1048 6.1/448 3.2/23.3 2417.1 19/140 1.5/11.1 12/8.5 100 2000 4.1278 2.21154 1.6/11.0 1.3/9.1 1.173 1.0/6.5 0.96.0 1000 26 2.9/1901.6/10.1 1.27.5 1.0/6.2 0.8/50 0.714.6 110 500 131 2.1125 1.1/6 0.9/51 0.74.3 0.63.5 0.5/3 1) At least 1000 consecutive readings were used to calculate the RMs and peak-to-peak noise values in this table Table 3. Input-Referred Noise ( uVRMs/pVpp)in Low-Power Mode 3V Analog Supply and Reference DR BITS OF QUTPUT -3dB CONFIG1DATA RATEBANDWIDTH PGA PGA PGA PGA PGA PGA PGA REGISTER (Hz GAIN E 1 GAIN 2 GAIN =3 GAIN E( GAIN= 16000 4933383116186 111/116 84834 421450 28/284 2096 28/272 19/177 14.3/133 9.7185 7.4/64 5.0/42.4 010 4000 1048 2.5/99 6.5/51 34/25.9 2.4/18.8 2.0/14.5 1.5/11.3 011 2000 524 6.141.8 3.2/22.2 2.3/15.9 1.8/12.1 149.3 1.2/7.8 1.0/6.7 100 1000 262 4.1263 2.2/14.6 16/9.9 1.3/8.1 106.2 0.8/5.4 0.7/4.7 101 500 131 3.0/179 1.6/9.8 1.1/6.8 0.9/5.7 0.714.2 0.6/3.6 0.5/34 110 250 65 2.1119 1.1/6.3 0.84.6 0.74.0 0.5/3.0 0.5/2.6 0.424 (1)At least 1000 consecutive readings were used to calculate the RMs and peak-to-peak noise values in this table Copyright@ 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R EXAS INSTRUMENTS ADS1296, ADS1296R ADS1298, ADS1298R www.tl.comcn ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 Table 4. Input-Referred noise(uVRMs/uPp)in High-Resolution Mode 5V Analog Supply and 4V Reference (1) DR BITS OF OUTPUT 3dB CoNFIG1 DATA RATEBANDWIDTH PGA PGA PGA PGA PGA PGA PGA REGISTER SPs) (Hz GAIN =1 GAIN =2 GAIN 3 GAIN E 4 GAIN E 6 GAIN 8 GAIN =12 000 32000 8398 521/5388 260/2900 173/1946 130/1403 87/917 65692 44/483 001 16000 4193 86/1252 43/633 29/402 22298 15/206 11141 7/91 010 8000 2096 17207 9112 6/71 4/57 3/36 329 2/18 011 4000 1048 6.4/48.2 3.4/259 24177 19154 1.5/11.2 1.3/9.6 1182 100 2000 524 4.2299 2.3/159 1.6/11.1 1.3/9.3 107.5 0.96.6 0.8/58 1000 29188161041178 0.9/6 0.74.9 064,70639 110 500 131 2.0/12.8 1.1/72 0.8/5.2 0.74.0 05/3.3 0.5/3.3 0.42.7 (1) At least 1000 consecutive readings were used to calculate the RMs and peak-to-peak noise values in this table Table 5. Input-Referred Noise(uVRMs/pVpp)in Low-Power Mode 5V Analog Supply and 4V Reference DR BITS OF OUTPUT 3dB CONFIG1 DATA RATE BANDWIDTH PGA PGA PGA PGA PGA PGA PGA REGISTER (SPS) GAIN E 1 AIN 2 GAIN=3 GAIN=4GAIN=6GAIN=8 GAIN=12 000 16000 419352659852632953 175/1918 132/1410 88/896 66/681 44458 8000 2096 88/1201 44/619 29/411 22/280 15/191 11:139 7/83 010 4000 17/208 3/37 2/16 011 2000 6.041.1 3.3/23.3 2.215.5 1.8/12.3 1.3/9.8 0.965 100 1000 4.1/27.1 2.3/14.8 1.5/10.1 1.2/8.1 0960 0.8/5.4 0.7/4.4 500 131 2.9/17.4 1.6/9.6 1.1/6.6 0.9/5.9 0.74.3 0.6/34 0.5/32 2.1119 0.814.6 0.6/3.7 3.0 0.4/2.5 0.4/2.2 (1) At least 1000 consecutive readings were used to calculate the RMs and peak-to-peak noise values in this table Table 6. Typical WCT Performance ANY ONE ANY TWO ALL THREE PARAMETER (A, B, or c) (A+B, A+C, or B+C) (A+B+C) UNIT Integrated noise 540 382 312 nORMS Power 59 65 W 3dB BW KHz Slew rate BW limited BW limited BW limited Copyright C 2010-2014, Texas Instruments Incorporated ADS1294. ADS1294R ADS1296. ADS1296R EXAS INSTRUMENTS ADS1298 ADS1298R ZHCS313J-JANUARY 2010-REVISED JANUARY 2014 www.tl.comcn PIN CONFIGURATIONS ZXG PACKAGE BGA-64 (TOP VIEW, SOLDER BUMPS ON BOTTOM SIDE) G F IN3P IN4 IN5P IN6P IN7P IN8P ININ IN2N IN3N iNn IN5N INn INZN IN8N TESTN TESTP VREFP VCAP4 PACE_ OUT2 PACE OUT1 WCT RLDINV RLDOUT RLDIN 3 RESP RESP MODP N RESV AVSS RLDREF AVDD AVDD VCAP1 PWDN GPIO1 GPIO4 AVSS AVSS AVSS AVSS VCAP2 RESET DAISYIN GPIO3 DRDY AVDD AVDD AVDD 6 DGND START CS GPIO2 DANI DGND VCAP3 AVDD1 DIN CLK SCLK DOUT DVDD DVDD CLKSEL AVSS1 Table. BGA PIn assignments NAME TERMINAL FUNCTION DESCRIPTION IN8P() A Analog input Differential analog positive input 8(ADS129B/8R) N7P(1) 1B balog input Differential analog positive input 7(ADS 1298/8R) INEP(1) 1C Analog input Differential analog positive input 6(ADS1296/8/6R/8R) INSP() 1D Analog input Differential analog positive input 5(ADS1296/8/6R/8R) IN4 1E Analog input Differential analog positive input 4 N3P(1 Analog input Differential analog positive input 3 N2P(1) 1G Analog input Differential analog positive input 2 N1P(1 Analog input Differential analog positive input 1 INn(1) 2A Analog input Differential analog negative input 8(ADS1298/8R) IN7N() Analog input Differential analog negative input 7(ADS1298/8R) IN6N (1) Analog input Differential analog negative input 6(ADS1296/8/6R/8R) IN5N们) Analog input Differential analog negative input 5 (ADS1296/8/6R/8R) INAN(T) B0D22 Analog input Differential analog negative input 4 1) Analog input Differential analog negative input 3 IN2N (1) Analog input Differential analog negative input 2 N1N(1) 2H Analog input Differential analog negative input 1 (1)Connect unused terminals to AVDD Copyright@ 2010-2014, Texas Instruments Incorporated

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