参数资料
型号: TLC3548CDWRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24
封装: GREEN, PLASTIC, SOIC-24
文件页数: 43/44页
文件大小: 1000K
代理商: TLC3548CDWRG4
TLC3544, TLC3548
5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL
ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
SLAS266C – OCTOBER 2000 – REVISED MAY 2003
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
general electrical characteristics over recommended operating free-air temperature range,
single-ended input, normal long sampling, 200 KSPS, AVDD = 5 V, external reference (VREFP = 4V,
VREFM = 0 V) or internal reference, SCLK frequency = 25 MHz, fixed channel at CONV mode 00,
analog input signal source resistance = 25
(unless otherwise noted) (continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DC Accuracy—Normal Short Sampling
EL
Integral linearity error
See Note 3
±0.8
LSB
ED
Differential linearity error
±0.6
LSB
EO
Zero offset error
See Note 4
–3
±0.6
3
LSB
E(g+)
Gain error
See Note 4
0
5
12
LSB
AC Accuracy—Normal Long Sampling
SINAD
Signal to noise ratio + distortion
fi = 20 kHz
78.6
80.8
dB
SINAD
Signal-to-noise ratio + distortion
fi = 100 kHz
77.6
dB
THD
Total harmonic distortion
fi = 20 kHz
–95
–90
dB
THD
Total harmonic distortion
fi = 100 kHz
–88
dB
SFDR
Spurious free dynamic range
fi = 20 kHz
90
97
dB
SFDR
Spurious free dynamic range
fi = 100 kHz
89
dB
ENOB
Effective number of bits
fi = 20 kHz
12.8
13.1
Bits
ENOB
Effective number of bits
fi = 100 kHz
12.6
Bits
SNR
Signal to noise ratio
fi = 20 kHz
79
81
dB
SNR
Signal-to-noise ratio
fi = 100 kHz
78
dB
Channel-to-channel isolation (see
Notes 2 and 5)
Fixed channel in conversion mode 00, fi = 35 kHz
100
dB
Analog input bandwidth
Full power bandwidth, –1 dB
2
MHz
Analog input bandwidth
Full power bandwidth, –3 dB
2.5
MHz
AC Accuracy—Normal Short Sampling
SINAD
Signal to noise ratio + distortion
fi = 20 kHz
78.9
dB
SINAD
Signal-to-noise ratio + distortion
fi = 100 kHz
77.6
dB
THD
Total harmonic distortion
fi = 20 kHz
–95
dB
THD
Total harmonic distortion
fi = 100 kHz
–88
dB
SNR
Signal to noise ratio
fi = 20 kHz
79
dB
SNR
Signal-to-noise ratio
fi = 100 kHz
78
dB
ENOB
Effective number of bits
fi = 20 kHz
12.8
Bits
ENOB
Effective number of bits
fi = 100 kHz
12.6
Bits
SFDR
Spurious free dynamic range
fi = 20 kHz
97
dB
SFDR
Spurious free dynamic range
fi = 100 kHz
89
dB
Channel-to-channel isolation (see
Notes 2 and 5)
Fixed channel in conversion mode 00, fi = 35 kHz
100
dB
Analog input bandwidth
Full power bandwidth, –1 dB
2
MHz
Analog input bandwidth
Full power bandwidth, –3 dB
2.5
MHz
All typical values are at TA = 25°C.
NOTES:
2. This is for a fixed channel in conversion mode 00 or 01. When switching the channels, additional multiplexer setting time is required
to overcome the memory effect of the charge redistribution DAC (refer to Figure 8).
3. Linear error is the maximum deviation from the best fit straight line through the A/D transfer characteristics.
4. Zero offset error is the difference between 0000000000000 and the converted output for zero input voltage; gain error is the
difference between 11111111111111 and the converted output for full-scale input voltage. The full-scale input voltage is equal to the
reference voltage being used.
5. It is measured by applying a full-scale of 35 kHz signal to other channels and determining how much the signal is attenuated in the
channel of interest. The converter samples this examined channel continuously. The channel-to-channel isolation is degraded if the
converter samples different channels alternately (refer to Figure 8).
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