7872 Просмотр технического описания (PDF) - MAXWELL TECHNOLOGIES
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7872 Datasheet PDF : 11 Pages
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14-Bit A/D Converter
7872
TABLE 3. 7872 DC ELECTRICAL CHARACTERISTICS FOR DYNAMIC PERFORMANCE 1
(VDD = 5 V ± 5%, VSS = -5 V ± 5%, AGND = DGND = 0 V,
fCLK = 2 MHZ EXTERNAL, fSAMPLE = 83 KHZ, -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
SUBGROUPS
MIN
TYP
MAX
UNIT
Signal to Noise Ratio VIN = 10kHz Sine Wave, TMIN to SNR
4, 5, 6
79
--
--
dB
TMAX;
SNR is typically 82dB for VIN < 41.5kHz 2
Total Harmonic Distortion VIN = 10kHz Sine Wave
THD
4, 5, 6
--
-86
--
dB
Peak Harmonic or Spurious Noise
--
4, 5, 6
--
-86
--
dB
Intermodulation Distortion
IMD
4, 5, 6
dB
Second Order Terms: fa = 9 kHz, fb = 9.5 kHz, fSAMPLE
= 50 kHz
--
-86
--
--
-86
--
Third Order Terms: fa = 9 kHz, fb = 9.5 kHz, fSAMPLE=
50 kHz
Track/Hold Acquisition Time
--
4, 5, 6
--
--
2
µs
1. VIN = ± 3 V. Guaranteed by design.
2. SNR calculation includes distortion and noise components.
PARAMETER
TABLE 4. 7872 DC ELECTRICAL CHARACTERISTICS FOR ACCURACY
(VDD = 5V ±5%, VSS = -5 V ± 5%, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)
SYMBOL
SUGROUPS
MIN
TYP
MAX
UNIT
Resolution
--
1, 2, 3
14
--
--
Bits
Resolution for Which No Missing Codes are Guaran-
--
teed
Integral Nonlinearity @ 25 °C
--
Integral Nonlinearity TMIN to TMAX
--
Bipolar Zero Error
--
Positive Gain Error 1
--
Negative Gain Error 1
--
1, 2, 3
14
--
--
Bits
1, 2, 3
--
±1
--
LSB
1, 2, 3
--
--
±2
LSB
1, 2, 3
--
--
±12 LSB
1, 2, 3
--
--
±12 LSB
1, 2, 3
--
--
±12 LSB
1. Measured with respect to internal reference.
PARAMETER
TABLE 5. 7872 DC ELECTRICAL CHARACTERISTICS FOR ANALOG INPUT
(VDD = 5V ±5%, VSS = -5 V ± 5%, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)
SYMBOL
SUBGROUPS
MIN
MAX
Input Voltage Range
--
1, 2, 3
-3
3
Input Current
--
1, 2, 3 -500 500
UNITS
V
µA
5.21.02 Rev 4
All data sheets are subject to change without notice 3
©2001 Maxwell Technologies
All rights reserved.
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