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PGA308 Datasheet(PDF) 5 Page - Texas Instruments |
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PGA308 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 30 page  PGA308 www.ti.com SBOS440B – JULY 2008 – REVISED DECEMBER 2010 ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the specified temperature range, TA = –40°C to +125°C. At TA = +25°C, VS = +5V, GND = 0V, DOUT/VCLAMP = +5V, and VREF = +5V, unless otherwise noted. PGA308 PARAMETER CONDITIONS MIN TYP MAX UNIT Over- and Under-Scale Limits Over-Scale Thresholds VLIM = 4V, register-selectable ratio of VLIM OS0 HL[2:0] (CFG1 register D[5:3]) = 000 0.97 0.9805 0.99 V/V OS1 HL[2:0] (CFG1 register D[5:3]) = 001 0.9588 0.9688 0.9788 V/V OS2 HL[2:0] (CFG1 register D[5:3]) = 010 0.9509 0.9609 0.9709 V/V OS3 HL[2:0] (CFG1 register D[5:3]) = 011 0.9392 0.9492 0.9492 V/V OS4 HL[2:0] (CFG1 register D[5:3]) = 100 0.8416 0.8516 0.8616 V/V OS5 HL[2:0] (CFG1 register D[5:3]) = 101 0.7673 0.7773 0.7873 V/V OS6 HL[2:0] (CFG1 register D[5:3]) = 110 0.6189 0.6289 0.6389 V/V OS7 HL[2:0] (CFG1 register D[5:3]) = 111 0.5603 0.5703 0.5803 V/V Over-Scale Threshold Tempco ±3 ppm/°C Over-Scale Amplifier Offset ±9 mV Over-Scale Amplifier Offset Drift ±10 mV/°C Under-Scale Thresholds VLIM = 5V, register-selectable ratio of VLIM US7 LL[2:0] (CFG1 register D[2:0]) = 111 0.0487 0.0547 0.0607 V/V US6 LL[2:0] (CFG1 register D[2:0]) = 110 0.04478 0.05078 0.05678 V/V US5 LL[2:0] (CFG1 register D[2:0]) = 101 0.04088 0.04688 0.05288 V/V US4 LL[2:0] (CFG1 register D[2:0]) = 100 0.03306 0.03906 0.04506 V/V US3 LL[2:0] (CFG1 register D[2:0]) = 011 0.02916 0.03516 0.04116 V/V US2 LL[2:0] (CFG1 register D[2:0]) = 010 0.02525 0.03125 0.03725 V/V US1 LL[2:0] (CFG1 register D[2:0]) = 001 0.01743 0.02343 0.02943 V/V US0 LL[2:0] (CFG1 register D[2:0]) = 000 0.01353 0.01953 0.02553 V/V Under-Scale Threshold Tempco ±3 ppm/°C Under-Scale Amplifier Offset ±9 mV Under-Scale Amplifier Offset Drift ±10 mV/°C Output Voltage Clamp Input Voltage Range VCLAMP ≤ VS, VS = +5V 1.25 4.95 V Input Bias Current ±60 nA VOUT Clamp Point VCLAMP – 0.05 VCLAMP VCLAMP + 0.05 V Fault Monitor Circuit (External Comparators) INP_HI Comparator Threshold Fault Detect Mode Select = 0 (bridge fault); see CFG1 Smaller of (VS – 1.2) or (0.65VFLT) V INN_HI Comparator Threshold register INP_LO Comparator Threshold Fault Detect Mode Select = 0 (bridge fault); see CFG1 Larger of (0.1V) or (0.35VFLT) V INN_LO Comparator Threshold register Fault Monitor Reference VFLT Fault Monitor Reference; see CFG1 register, FLT REF bit VS or VREF V sets VFLT INP_HI Comparator Threshold Fault Detect Mode Select = 1 (common-mode fault); see VS – 1.2 V INN_HI Comparator Threshold CFG1 register INP_LO Comparator Threshold Fault Detect Mode Select = 1 (common-mode fault); see 70 100 130 mV INN_LO Comparator Threshold CFG1 register Comparator Hysteresis 7 mV Comparator Input Offset Voltage ±10 mV Fault Monitor Circuit (Internal Comparators) A1SAT_LO Comparator Threshold Threshold is amplifier negative saturation voltage 100 mV A2SAT_LO Comparator Threshold A1SAT_HI Comparator Threshold Threshold is amplifier positive saturation voltage VS – 0.12 V A2SAT_HI Comparator Threshold A3SAT_LO Comparator Threshold Threshold is amplifier negative saturation voltage 50 mV VIN1, VIN2 Pull-up Current Sources Pull-Up Current Source IPU Register-selectable 15 30 45 nA Current Source Matching ±1.5 ±7 nA Current Source Tempco ±5 pA/°C Copyright © 2008–2010, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): PGA308 |
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