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ADS828 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS828 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 17 page ADS828 3 SBAS126A ELECTRICAL CHARACTERISTICS (Cont.) At TA = full specified temperature range, single-ended input range = 1.5V to 3.5V, sampling rate = 75MHz, convert command clock = +3V, external reference unless otherwise noted. CMOS Straight Offset Binary ADS828E PARAMETER CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS Logic Family TTL, +3V/5V CMOS Compatible Convert Command Start Conversion Rising Edge of Convert Clock High Level Input Current(5) (VIN = 5V) 100 µA Low Level Input Current (VIN = 0V) 10 µA High Level Input Voltage +2.0 V Low Level Input Voltage +0.8 V Input Capacitance 5pF DIGITAL OUTPUTS Logic Family Logic Coding Low Output Voltage (IOL = 50µA) VDRV = 5V +0.1 V Low Output Voltage, (IOL = 1.6mA) +0.2 V High Output Voltage, (IOH = 50µA) +4.9 V High Output Voltage, (IOH = 0.5mA) +4.8 V Low Output Voltage (IOL = 50µA) VDRV = 3V +0.1 V High Output Voltage, (IOH = 50µA) +2.8 V 3-State Enable Time OE = L 20 40 ns 3-State Disable Time OE = H 2 10 ns Output Capacitance 5pF ACCURACY (Internal Reference, 2Vp-p, Unless Otherwise Noted) fS = 2.5MHz Zero Error (Referred to –FS) at 25 °C ±0.5 ±3.0 %FS Zero Error Drift (Referred to –FS) 1.5 ppm/ °C Midscale Offset Error at 25 °C ±0.29 %FS Gain Error(6) at 25 °C ±1.5 ±2.5 %FS Gain Error Drift(6) 32.3 ppm/ °C Gain Error(7) at 25 °C ±0.75 ±1.5 %FS Gain Error Drift(7) 4.6 ppm/ °C Power Supply Rejection of Gain ∆ V S = ±5% 68 dB REFT Tolerance Deviation from Ideal 3.5V ±10 ±25 mV REFB Tolerance Deviation From Ideal 1.5V ±10 ±25 mV External REFT Voltage Range REFB + 0.8 3.5 VS – 1.25 V External REFB Voltage Range 1.25 1.5 REFT – 0.8 V Reference Input Resistance 1.6 k Ω POWER SUPPLY REQUIREMENTS Supply Voltage: +VS Operating +4.75 +5.0 +5.25 V Supply Current: +IS Operating 68 mA Output Driver Supply Current (VDRV) 9mA Power Dissipation: VDRV = 5V External Reference 340 385 mW VDRV = 3V External Reference 325 mW VDRV = 5V Internal Reference 355 mW VDRV = 3V Internal Reference 345 mW Power Down Operating 20 mW Thermal Resistance, θ JA SSOP-28 89 °C/W NOTES: (1) Spurious Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to Full Scale. (3) Two-tone intermodulation distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the two-tone fundamental envelope. (4) Effective number of bits (ENOB) is defined by (SINAD – 1.76 ) / 6.02. (5) A 50k Ω pull-down resistor is inserted internally. (6) Includes internal reference. (7) Excludes internal reference. |
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