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ADS7804U Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7804U Datasheet(HTML) 3 Page - Texas Instruments |
3 / 19 page ADS7804 3 SBAS019A www.ti.com ELECTRICAL CHARACTERISTICS (Cont.) At TA = –40°C to +85°C, fS = 100kHz, and VDIG = VANA = +5V, using internal reference, unless otherwise specified. ADS7804P, U ADS7804PB, UB PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS REFERENCE Internal Reference Voltage 2.48 2.5 2.52 ✻✻ ✻ V Internal Reference Source Current 1 ✻ µA (Must use external buffer.) Internal Reference Drift 8 ppm/ °C External Reference Voltage Range 2.3 2.5 2.7 ✻✻ ✻ V for Specified Linearity External Reference Current Drain Ext. 2.5000V Ref 100 ✻ µA DIGITAL INPUTS Logic Levels VIL –0.3 +0.8 ✻✻ V VIH +2.0 VD +0.3V ✻✻ V IIL ±10 ✻ µA IIH ±10 ✻ µA DIGITAL OUTPUTS Data Format Data Coding VOL ISINK = 1.6mA +0.4 ✻ V VOH ISOURCE = 500µA+4 ✻ V Leakage Current High-Z State, ±5 ✻ µA VOUT = 0V to VDIG Output Capacitance High-Z State 15 15 pF DIGITAL TIMING Bus Access Time 83 ✻ ns Bus Relinquish Time 83 ✻ ns POWER SUPPLIES Specified Performance VDIG Must be ≤ V ANA +4.75 +5 +5.25 ✻✻ ✻ V VANA +4.75 +5 +5.25 ✻✻ ✻ V +IDIG 0.3 ✻ mA +IANA 16 ✻ mA Power Dissipation fS = 100kHz 100 ✻ mW TEMPERATURE RANGE Specified Performance –40 +85 ✻✻ °C Derated Performance –55 +125 ✻✻ °C Storage –65 +150 ✻✻ °C Thermal Resistance ( θ JA) Plastic DIP 75 ✻ °C/W SO 75 ✻ °C/W NOTES: (1) LSB means Least Significant Bit. For the 12-bit, ±10V input ADS7804, one LSB is 4.88mV. (2) Typical rms noise at worst case transitions and temperatures. (3) As measured with fixed resistors shown in Figure 4. Adjustable to zero with external potentiometer. (4) Full scale error is the worst case of –Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the transition voltage (not divided by the full-scale range) and includes the effect of offset error. (5) All specifications in dB are referred to a full-scale ±10V input. (6) Full-Power Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60dB, or 10 bits of accuracy. (7) Recovers to specified performance after 2 x FS input overvoltage. Parallel 12 Bits Binary Two’s Complement |
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