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ADS-916 Datasheet(PDF) 3 Page - Murata Power Solutions Inc. |
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ADS-916 Datasheet(HTML) 3 Page - Murata Power Solutions Inc. |
3 / 8 page ® ® ADS-916 3 +25°C 0 to +70°C –55 to +125°C ANALOG OUTPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS Internal Reference Voltage +9.95 +10.0 +10.05 +9.95 +10.0 +10.05 +9.95 +10.0 +10.05 Volts Drift — ±5 — — ±5 — — ±5 — ppm/°C External Current — — 1.5 — — 1.5 — — 1.5 mA DIGITAL OUTPUTS Logic Levels Logic "1" +2.4 — — +2.4 — — +2.4 — — Volts Logic "0" — — +0.4 — — +0.4 — — +0.4 Volts Logic Loading "1" — — –4 — — –4 — — –4 mA Logic Loading "0" — — +4 — — +4 — — +4 mA Delay, Falling Edge of EOC to Output Data Valid — — 35 — — 35 — — 35 ns Output Coding Straight Binary POWER REQUIREMENTS, ±15V Power Supply Ranges +15V Supply +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 Volts –15V Supply –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 Volts +5V Supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 Volts Power Supply Currents +15V Supply — +50 +65 — +50 +65 — +50 +65 mA –15V Supply — –40 –50 — –40 –50 — –40 –50 mA +5V Supply — +70 +85 — +70 +85 — +70 +85 mA Power Dissipation — 1.6 1.8 — 1.6 1.8 — 1.6 1.8 Watts Power Supply Rejection — — ±0.01 — — ±0.01 — — ±0.01 %FSR/%V POWER REQUIREMENTS, ±12V Power Supply Ranges +12V Supply +11.5 +12.0 +12.5 +11.5 +12.0 +12.5 +11.5 +12.0 +12.5 Volts –12V Supply –11.5 –12.0 –12.5 –11.5 –12.0 –12.5 –11.5 –12.0 –12.5 Volts +5V Supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 Volts Power Supply Currents +12V Supply — +50 +65 — +50 +65 — +50 +65 mA –12V Supply — –40 –50 — –40 –50 — –40 –50 mA +5V Supply — +70 +80 — +70 +80 — +70 +80 mA Power Dissipation — 1.4 1.6 — 1.4 1.6 — 1.4 1.6 Watts Power Supply Rejection — — ±0.01 — — ±0.01 — — ±0.01 %FSR/%V 6.02 (SNR + Distortion) – 1.76 + 20 log Full Scale Amplitude Actual Input Amplitude Effective bits is equal to: This is the time required before the A/D output data is valid after the analog input is back within the specified range. Footnotes: All power supplies must be on before applying a start convert pulse. All supplies and the clock (START CONVERT) must be present during warmup periods. The device must be continuously converting during this time. There is a slight degradation in performance when using ±12V supplies. See Ordering Information for availability of ±5V input range. Contact DATEL for availability of other input voltage ranges. A 500 kHz clock with a 200ns wide start convert pulse is used for all production testing. Only the rising edge of the start convert pulse is required for the device to operate (edge-triggered). See Timing Diagram for more details. TECHNICAL NOTES 1. Obtaining fully specified performance from the ADS-916 requires careful attention to pc-card layout and power supply decoupling. The device's analog and digital ground systems are connected to each other internally. For optimal performance, tie all ground pins (14, 19 and 23) directly to a large analog ground plane beneath the package. Bypass all power supplies and the REFERENCE OUTPUT (pin 21) to ground with 4.7µF tantalum capacitors in parallel with 0.1µF ceramic capacitors. Locate the bypass capaci- tors as close to the unit as possible. If the user-installed offset and gain adjusting circuit shown in Figure 2 is used, also locate it as close to the ADS-916 as possible. 2. The ADS-916 achieves its specified accuracies without the need for external calibration. If required, the device's small initial offset and gain errors can be reduced to zero using the input circuit of Figure 2. When using this circuit, or any similar offset and gain-calibration hardware, make adjust- ments following warmup. To avoid interaction, always adjust offset before gain. 3. When operating the ADS-916 from ±12V supplies, do not drive external circuitry with the REFERENCE OUTPUT. The reference's accuracy and drift specifications may not be met, and loading the circuit may cause accuracy errors within the converter. 4. Applying a start convert pulse while a conversion is in progress (EOC = logic "1") initiates a new and inaccurate conversion cycle. Data for the interrupted and subsequent conversions will be invalid. |
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