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參數資料
| 型號： | ADS953 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 18-Bit, 1MHz, Low-Distortion Sampling A/D Converters |
| 中文描述： | 18位，1MHz的，低失真的采樣A / D轉換器 |
| 文件頁數： | 3/6頁 |
| 文件大小： | 141K |
| 代理商： | ADS953 |
ADS-953
3
+25°C 0 to +70°C –40 to +110°C
ANALOG OUTPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Internal Reference
Voltage +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 Volts
Drift — ±30 — — ±30 — — ±30 — ppm/°C
External Current — 1 — — 1 — — 1 — 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
Output Coding
Complementary Offset Binary
POWER REQUIREMENTS
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
–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 — +29 — — +29 — — +29 — mA
–15V Supply — –15 — — –15 — — –15 — mA
+5V Supply — +104 — — +104 — — +104 — mA
–5V Supply — –54 — — –54 — — –54 — mA
Power Dissipation
— 1.45 1.65 — 1.45 1.65 — 1.45 1.65 Watts
Power Supply Rejection
— — ±0.05 — — ±0.05 — — ±0.05 %FSR/%V
TECHNICAL NOTES
1. Obtaining fully specified performance from the ADS-953
requires careful attention to pc-card layout and power
supply decoupling. The device's analog and digital ground
systems are not connected to each other internally. For
optimal performance, tie all ground pins (3, 12 and 13)
directly to a large
analog
ground plane beneath the pack-
age.
Bypass all power supplies and the +5V REFERENCE
OUTPUT (pin 5) to ground with 10μF tantalum capacitors in
parallel with 0.1μF ceramic capacitors. Locate the bypass
capacitors as close to the unit as possible. Tie a 47μF
capacitor between COMPENSATION (pin 7) and ground.
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.
This is the time required before the A/D output data is valid once the analog input
is back within the specified range.
6.02
(SNR + Distortion) – 1.76 + 20 log
Full Scale Amplitude
Actual Input Amplitude
Contact DATEL for other input voltage ranges.
A 1MHz clock with a 500nsec positive pulse width (50% duty cycle) is used for
all production testing. Any duty cycle may be used as long as a minimum
positive pulse width of 20nsec is maintained. For applications requiring lower
sampling rates, clock frequencies lower than 1MHz may be used.
Effective bits is equal to:
2. The ADS-953 achieves its specified accuracies without the
need for external calibration. If required, the device's small
initial errors can be reduced to zero using the adjustment
circuitry shown in Figure 2. When using this circuitry, or any
similar offset and gain calibration hardware, make adjust-
ments following warmup. To avoid interaction, always adjust
offset before gain. Float pin 6 if not using gain adjust
circuits.
3. Applying a start convert pulse while a conversion is in prog-
ress (EOC = logic "1") will initiate a new and probably
inaccurate conversion cycle. Data for the interrupted and
subsequent conversions will be invalid.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADS-953 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:18-Bit, 1MHz, Low-Distortion Sampling A/D Converters |
| ADS-953MC | 制造商:Murata Power Solutions 功能描述:Dual ADC 2-Step Flash 1Msps 18-bit Parallel 32-Pin TDIP |
| ADS-953ME | 制造商:Murata Power Solutions 功能描述:Dual ADC 2-Step Flash 1Msps 18-bit Parallel 32-Pin TDIP |
| ADS976 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| ADS9819U | 制造商:Texas Instruments 功能描述: |
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