AD7792/AD7792中文资料.pdf-资料库

316/24∑-Δ ADC AD7792/AD7793 23 (RMS) 40 nV4.17 Hz 85 nV16.7 Hz 400 μA 1 μA 4 ppm/°C 4.17 Hz470 Hz 3 50 Hz/60 Hz 2.7 V5.25 V -40+105 16TSSOP SPI®QSPI™MICROWIRE™DSP SCLK RTD / 6DVM GND AVDD REFIN(+)/AIN3(+) REFIN(–)/AIN3(–) AIN1(+) AIN1(–) AIN2(+) AIN2(–) IOUT1 IOUT2 VBIAS BAND GAP REFERENCE AVDD MUX AVDD GND BUF IN-AMP GND Σ-Δ ADC SERIAL INTERFACE AND CONTROL LOGIC INTERNAL CLOCK AD7792: 16-BIT AD7793: 24-BIT CLK DOUT/RDY DIN SCLK CS DVDD 1 0 0 - 5 5 8 4 0 AD7792/AD7793 16/24Σ-ΔADC 64 4.17 Hz(RMS)40 nV AVDD/2 4.17 Hz470 Hz 2.7 V5.25 V400 μA 16TSSOP Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 ©2004–2007 Analog Devices, Inc. All rights reserved. ADIADIADI

AD7792/AD7793 .................................................................................................. 1 ................................................................................................... 1 ........................................................................................... 1 ................................................................................................... 1 .......................................................................................... 2 ........................................................................................... 3 ........................................................................................... 6 ...................................................................................... 7 ............................................................................. 8 ESD ................................................................................... 8 ..................................................................... 9 .............................................................. 11 ................................................................... 11 ....................................................................... 12 ................................................................................ 13 .................................................................................... 14 ............................................................................ 14 ............................................................................ 15 ............................................................................ 15 ............................................................................ 17 ............................................................................ 18 ID ................................................................................ 18 IO ............................................................................... 18 20073—AB .................................................................................... ......................................................................... 1 ................................................................................. 3 1 ....................................................................... 5 567 ..................................................................... 11 8910 ................................................................... 12 16 ......................................................................................... 16 “” ............................................................................ 20 “”“” ................................. 29 “” ................................................................... 30 ............................................................................ 19 ....................................................................... 19 ADC ............................................................................... 20 ......................................................................................... 20 ................................................................................ 21 ........................................................................................ 24 ....................................................................... 24 ............................................................................ 24 / ............................................................. 24 ....................................................................... 24 ................................................................................ 25 ................................................................................ 25 ................................................................... 25 ................................................................................ 25 ......................................................................................... 25 AVDD .......................................................................... 26 ......................................................................................... 26 ............................................................................ 26 ........................................................................................ 28 .......................................................... 28 RTD ............................................................... 29 ........................................................................................ 30 ................................................................................ 30 20054—0A “” ........................................................ 8 17 ......................................................................................... 22 .............................................................. 24 ................................................................................ 26 ................................................................................ 30 Rev. B | Page 2 of 32

AD7792/AD7793 AVDD = 2.7 V5.25 VDVDD = 2.7 V5.25 VGND = 0 VTMINTMAX 1. ADC 2 / Hz AD7792B/AD7793B1 4.17 470 24 61 ±15 ±1 ±10 ±10 ±1 ±3 100 ±VREF/ GND – 30 mV AVDD + 30 mV GND + 100 mV AVDD – 100 mV GND + 300 mV AVDD – 1.1 0.5 ±1 ±250 ±2 ±400 ±50 65 80 90 80 94 90 100 100 100 fADC< 242 HzAD7793 AD7792 “” “” ppm( ) μV nV/°C μV ppm/°C ppm/°C dB V nom V min V max V min V max V min V max V min nA max pA max pA/°C typ nA/V typ pA/V/°C typ dB min dB min dB min dB min dB min dB min dB min dB min dB min = 116 = 32128 AIN = 1 V/ ≥ 4 VREF = REFIN(+) − REFIN(−) = 1128 = 12 = 12 = 4128 VCM = (AIN(+) + AIN(−))/2 = 4128 = 12 < 100 Hz = 4128 < 100 Hz = 12 80 dB50±1 Hz60±1 HzFS[3:0] = 10106 90 dB50 ± 1 HzFS[3:0] = 10016 100 dB60 ± 1 HzFS[3:0] = 10006 90 dB50±1 Hz60±1 HzFS[3:0] = 10106 100 dB50 ± 1 HzFS[3:0] = 10016 100 dB60 ± 1 HzFS[3:0] = 10006 AIN = 1 V/ ≥ 4 50 ± 1 Hz60 ± 1 HzFS[3:0] = 10106 50±1 Hz (FS[3:0]=1001)6, 60±1 Hz (FS[3:0]=1000)6 3 4 3, 5 4 AIN2 (VCM) 2 2 50 Hz60 Hz 50 Hz 60 Hz 50 Hz60 Hz 50 Hz 60 Hz 50 Hz60 Hz2 50 Hz60 Hz2 Rev. B | Page 3 of 32

AD7792/AD7793 2 REFIN 2 REFIN2 IEXC1IEXC2 (25°C) (VDD) VBIAS VBIAS / 2 CS2 VINL VINH AD7792B/AD7793B1 1.17 ± 0.01% 4 51 85 2.5 0.1 AVDD GND − 30 mV AVDD + 30 mV 400 ±0.03 Same as for analog inputs 100 10/210/1000 ±5 200 ±0.5 50 2 0.2 AVDD − 0.65 AVDD − 1.1 GND − 30 mV ±2 0.81 AVDD/2 See Figure 10 64 ± 3% 50:50 64 45:55 to 55:45 V/ ppm/°C ppm/°C dB V V V V V nA/V nA/V/°C dB μA % ppm/°C % ppm/°C %/V %/V V V V °C mV/°C V ms/nF kHz/ % kHz % / AVDD = 4 V, TA = 25°C REFIN = REFIN(+) − REFIN(−) VREF = AVDD 0.9 × VREF/ IEXC1IEXC2VOUT = 0 V AVDD = 5 V ± 5% 10 μA210 μA 1 mA AIN 2CLK1 = CLK0 = 1 128 kHz 64 kHz128 kHz 0.8 0.4 2.0 V V V DVDD = 5 V DVDD = 3 V DVDD = 3 V or 5 V Rev. B | Page 4 of 32

SCLKCLKDIN 2 VT(+) VT(–) VT(+) −VT(−) VT(+) VT(–) VT(+) −VT(−) (CLK) VOH2 VOL2 VOH2 VOL2 2 7 IDD AVDDGND DVDDGND IDD() AD7792B/AD7793B1 / AD7792/AD7793 1.4/2 0.8/1.7 0.1/0.17 0.9/2 0.4/1.35 0.06/0.13 ±10 10 DVDD − 0.6 0.4 4 0.4 ±10 10 Offset binary +1.05 × FS −1.05 × FS 0.8 × FS 2.1 × FS 2.7/5.25 2.7/5.25 140 581 004 005 1 V min/V max V min/V max V min/V max V min/V max V min/V max V min/V max μA max pF typ V min V max V min V max μA max pF typ V max V min V min V max V min/max V min/max μA max μA max μA max μA max μA max DVDD = 5 V DVDD = 5 V DVDD = 5 V DVDD = 3 V DVDD = 3 V DVDD = 3 V VIN = DVDD GND DVDD = 3 V, ISOURCE = 100 μA DVDD = 3 V, ISINK = 100 μA DVDD = 5 V, ISOURCE = 200 μA DVDD = 5 V, ISINK = 1.6 mA (DOUT/RDY)/800 μA (CLK) 110 μA (AVDD = 3 V)125 μA (AVDD = 5 V) 130 μA (AVDD = 3 V)165 μA (AVDD = 5 V) = 12 300 μA (AVDD = 3 V)350 μA (AVDD = 5 V) = 4128 400 μA (AVDD = 3 V)450 μA (AVDD = 5 V) = 4128 1 -40+10519.6 Hz39.2 HzAIN(+)AIN(−)AVDD – 16 VINL(PSR) (CMR)(NMR)INL18 ppmPSR69 dB AVDD − 1.6 V 2 3 4 5 (AVDD = 4 V = 1TA = 25°C) 6 FS[3:0] 7 DVDDGND Rev. B | Page 5 of 32

AD7792/AD7793 AVDD = 2.7 V5.25 VDVDD = 2.7 V5.25 VGND = 0 V0 = 0 V1 = DVDD 2 1,2 t3 t4 / SCLK SCLK 3 t1 t2 t5 t6 t7 5, 6 t8 t9 t10 t11 TMINTMAX(B) 100 100 0 60 80 0 60 80 10 80 0 10 0 30 25 0 ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, ns, CSDOUT/RDY DVDD = 4.75 V5.25 V DVDD = 2.7 V3.6 V SCLK4 DVDD = 4.75 V5.25 V DVDD = 2.7 V3.6 V CS SCLKCS SCLKDOUT/RDY CSSCLK4 SCLK SCLK CSSCLK 1 tR = tF = 5 nsDVDD10%90%1.6 V 2 34 3 2VOLVOH 4 5 20.5 V50 pF SCLKSCLK 6 ADCRDYRDY ISINK (1.6mA WITH DVDD = 5V, 100μA WITH DVDD = 3V) TO OUTPUT PIN 50pF 1.6V ISOURCE (200μA WITH DVDD = 5V, 100μA WITH DVDD = 3V) 2 0 0 - 5 5 8 4 0 2. Rev. B | Page 6 of 32

AD7792/AD7793 CS (I) DOUT/RDY (O) SCLK (I) t1 t2 MSB t3 t6 t5 LSB t7 t4 NOTES 1. I = INPUT, O = OUTPUT 3. 3 0 0 - 5 5 8 4 0 CS (I) SCLK (I) DIN (I) t8 t11 t9 t10 MSB LSB NOTES 1. I = INPUT, O = OUTPUT 4. 4 0 0 - 5 5 8 4 0 Rev. B | Page 7 of 32

AD7792/AD7793 TA = 25°C 3 AVDDGND DVDDGND GND GND GND GND AIN/ TSSOP θJA θJC (60) (15) −0.3 V +7 V −0.3 V +7 V −0.3 V AVDD + 0.3 V −0.3 V AVDD + 0.3 V −0.3 V DVDD + 0.3 V −0.3 V DVDD + 0.3 V 10 mA −40°C +105°C −65°C +150°C 150°C 128°C/W 14°C/W 215°C 220°C ESD() ESD ESD ESD Rev. B | Page 8 of 32

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