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DAC7802 Datasheet(PDF) 3 Page - Texas Instruments |
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DAC7802 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 23 page DAC7800, 7801, 7802 3 SBAS005A www.ti.com AC PERFORMANCE OUTPUT OP AMP IS OPA602. At VDD = +5VDC, VREF A = VREF B = +10V, TA = +25°C, unless otherwise noted. These specifications are fully characterized but not subject to test. NOTE: (1) Ensured but not tested. DAC7800, 7801, 7802K DAC7800, 7801, 7802L PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS OUTPUT CURRENT SETTLING TIME To 0.01% of Full-Scale 0.4 0.8 ✻✻ µs RL = 100Ω, CL = 13pF DIGITAL-TO-ANALOG GLITCH IMPULSE VREF A = VREF B = 0V 0.9 ✻ nV-s RL = 100Ω, CL = 13pF AC FEEDTHROUGH fVREF = 10kHz –75 –72 ✻✻ dB OUTPUT CAPACITANCE DAC Loaded with All 0s 30 50 ✻✻ pF DAC Loaded with All 1s 70 100 ✻✻ pF CHANNEL-TO-CHANNEL ISOLATION VREF A to IOUT B fVREF A = 10kHz –90 –94 ✻✻ dB VREF B = 0V, Both DACs Loaded with 1s VREF B to IOUT A fVREF B = 10kHz –90 –101 ✻✻ dB VREF A = 0V, Both DACs Loaded with 1s DIGITAL CROSSTALK Full-Scale Transition 0.9 ✻ nV-s RL = 100Ω, CL = 13pF ✻ Same specification as for DAC7800, 7801, and 7802K. DAC7800 BLOCK DIAGRAM DAC A DAC B DAC A Register 12 12 12 UPD B I AGND B R V V R I AGND A UPD A OUT B FB B REF B REF A FB A OUT A 12 V DD 9 DGND 10 15 16 14 13 4 3 2 1 6 DAC B Register Bit 0 Bit 11 Bit 12 Bit 23 7 11 CLR 12 DAC7800 Data In 5 CLK 8 CS PIN CONFIGURATION 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 AGND A CLK UPD A Data In CS AGND B I R V V CLR UPD B DGND OUT A FB A REF A OUT B DAC7800 I R V FB B REF B DD CLK UPD A UPD B CS CLR FUNCTION XXXX 0 All register contents set to 0’s (asynchronous). X X X 1 X No data transfer. X X 0 1 Input data is clocked into input register (location Bit 23) and previous data shifts. X 0101 Input register bits 23 (LSB) - 12 (MSB) are loaded into DAC A. X 1001 Input register bits 11 (LSB) - 0 (MSB) are loaded into DAC B. X 0001 Input register bits 23 (LSB) - 12 (MSB) are loaded into DAC A, and input register bits 11 (LSB) - 0 (MSB) are loaded into DAC B. X = Don’t care. means falling edge triggered. LOGIC TRUTH TABLE Top View DIP |
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