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MC3410 Datasheet(PDF) 5 Page - NXP Semiconductors |
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MC3410 Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 8 page Philips Semiconductors Linear Products Product specification MC3410, MC3410C 10-Bit high-speed multiplying D/A converter August 31, 1994 747 When a DC reference voltage is used, capacitive bypass to ground is recommended. The 5V logic supply is not recommended as a reference voltage. If a well regulated 5.0V supply, which drives logic, is to be used as the reference, R16 should be decoupled by connecting it to the +5.0V logic supply through another resistor and bypassing the junction of the two resistors with a 0.1 µF capacitor to ground. The reference amplifier is internally-compensated with a 10pF feed-forward capacitor, which gives it its high slew rate and fast settling time. Proper phase margin is maintained with all possible values of R16 and reference voltages which supply 2.0mA reference current into Pin 16. The reference current can also be supplied by a high impedance current source of 2.0mA. As R16 increases, the bandwidth of the amplifier decreases slightly and settling time increases. For a current source with a dynamic output impedance of 1.0M Ω, the bandwidth of the reference amplifier is approximately half what it is in the case of R16=1.0kΩ, and settling time is ≈ 10µs. The reference amplifier phase margin decreases as the current source value decreases in the case of a current source reference, so that the minimum reference current supplied from a current source is 0.5mA for stability. OUTPUT VOLTAGE COMPLIANCE The output voltage compliance ranges from -2.5 to +0.2V. As shown in Figure 2, this compliance range is nearly constant over temperature. At the temperature extremes, however, the compliance voltage may be reduced if VEE>-15V. ACCURACY Absolute accuracy is a measure of each output current level with respect to its intended value. It is dependent upon relative accuracy and full-scale current drift. Relative accuracy, or linearity, is the measure of each output current with respect to its intended fraction of the full-scale current. The relative accuracy of the MC3410 is fairly constant over temperature due to the excellent temperature tracking, of the implanted resistors. The full-scale current from the reference amplifier may drift with temperature causing a change in the absolute accuracy. However, the MC3410 has a low full-scale current drift with temperature. The MC3410 are accurate to within ±0.05% at 25°C with a reference current of 2.0mA on Pin 16. Figure 5. MC3410 Equivalent Circuit CODE SELECTED 0111110011 R MSB LSB (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) GND (2) (3) (INTERNAL) 2R SEGMENT DECODER (15) (16) + – R 2R R 2R R 2R R 2R R 2R 2R 2R 2R1 R1 R1 R1 R1 VEE (1) VREF + – VBIAS IOUT D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 |
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