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ADC3221 Arkusz danych(PDF) 11 Page - Texas Instruments |
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ADC3221 Arkusz danych(HTML) 11 Page - Texas Instruments |
11 / 71 page 11 THS4552 www.ti.com SBOS831 – DECEMBER 2016 Product Folder Links: THS4552 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Electrical Characteristics: (VS+) – (VS–) = 3 V (continued) at TA ≈ 25°C, VOCM pin = open, RF = 1 kΩ, RL = 1 kΩ, VOUT = 2 VPP, 50-Ω input match, G = 1 V/V, PD = VS+, single-ended input, differential output, and input and output referenced to default midsupply for ac-coupled tests (unless otherwise noted); specifications are per channel; see Figure 61 for a gain of 1-V/V test circuit PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL(1) (6) Specifications are from input VOCM pin to differential output average voltage. OUTPUT COMMON-MODE VOLTAGE (VOCM) CONTROL (6) (see Figure 65) SSBW Small-signal bandwidth VOCM = 100 mVPP at the control pin 40 MHz C LSBW Large-signal bandwidth VOCM = 1 VPP at the control pin 8 MHz C SR Slew rate(2) From 1-VPP LSBW 12 V/µs C Output common-mode noise VOCM pin driven from low impedance, f ≥ 2 kHz 15 nV/ √Hz Gain VOCM control pin input to output average voltage (see Figure 65) 0.997 0.999 1.001 V/V A DC output balance (differential mode to common-mode output) VOUT = ±1 V 85 dB C Output balance SSBW VOUT = 100 mVPP (output balance drops –3 dB from the 85-dB dc level) 300 kHz C LSBW VOUT = 1 VPP (output balance drops –3 dB from the 85-dB dc level) 300 C Input bias current –100 ±10 100 nA A Input impedance 47 || 1.3 kΩ || pF C Default voltage offset from [(VS+) – (VS–)] / 2 VOCM pin open –15 ±2 15 mV A Default voltage offset drift from [(VS+) – (VS–)] / 2 TA = –40°C to +125°C 15 35 55 µA/°C B CM VOS Common-mode offset voltage VOCM input driven to [(VS+) – (VS–)] / 2 TA = 25°C –5.0 ±1 5.0 mV A TA = 0°C to +70°C –5.25 5.5 B TA = –40°C to +85°C –5.7 5.6 B TA = –40°C to +125°C –5.7 6.0 B Common-mode offset voltage drift(4) VOCM input driven to [(VS+) – (VS–)] / 2 –10 ±2 10 µV/°C B Common-mode headroom to negative supply –PSRR test (supply to VOD) –PSRR > 80 dB 0.55 V C Common-mode loop supply headroom to negative supply < ±15-mV shift from midsupply CM VOS TA = 25°C 0.55 V A TA = 0°C to +70°C 0.6 B TA = –40°C to +85°C 0.65 B TA = –40°C to +125°C 0.7 B Common-mode headroom to positive supply +PSRR test (supply to VOD) +PSRR > 80 dB 0.55 V C Common-mode loop supply headroom to positive supply < ±15-mV shift from midsupply CM VOS TA = 25°C 1.2 V A TA = 0°C to +70°C 1.25 B TA = –40°C to +85°C 1.3 B TA = –40°C to +125°C 1.3 B |
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