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| 型號： | TLC3548CPW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 42/44頁 |
| 文件大小： | 1000K |
| 代理商： | TLC3548CPW |
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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
7
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 = 4 V,
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
Resolution
14
bits
Analog Input
Voltage range
0
Reference
V
Leakage current
0.01
0.05
A
Capacitance
30
pF
Reference
Internal reference voltage
3.85
4
4.07
V
Internal reference temperature
coefficient
100
ppm/
°C
Internal reference source current
1.8
2.5
mA
Internal reference startup time
20
ms
VREFP
External positive reference voltage
3
5
V
VREFM
External negative reference voltage
0
AGND
V
No conversion (AVDD = 5 V,
CS = DVDD, SCLK = DGND)
100
M
External reference input impedance
Normal long sampling (AVDD = 5 V,
CS = DGND, SCLK = 25 MHz,
External conversion clock)
8.3
12.5
k
External reference current
No conversion (VREFP = AVDD = 5 V,
VREFM = AGND, External reference,
CS = DVDD)
1.5
A
External reference current
Normal long sampling (AVDD = 5 V,
CS = DGND, SCLK = 25 MHz external
conversion clock at VREF = 5 V)
0.4
0.6
mA
Throughput Rate
f
Internal oscillation frequency
DVDD = 2.7 V to 5.5 V
6.5
MHz
Internal OSC, 6.5 MHz minute
2.785
t(conv)
Conversion time
Conversion clock is external source,
SCLK = 25 MHz (see Note 1)
2.895
s
Acquisition time
Normal short sampling
1.2
s
Throughput rate (see Note 2)
Normal long sampling, fixed channel in mode
00 or 01
200
KSPS
DC Accuracy—Normal Long Sampling
EL
Integral linearity error
See Note 3
–1
±0.5
1
LSB
ED
Differential linearity error
–1
±0.5
1
LSB
EO
Zero offset error
See Note 4
–3
±0.6
3
LSB
E(g+)
Gain error
See Note 4
0
5
12
LSB
All typical values are at TA = 25°C.
NOTES:
1. Conversion time t(conv) = (18x4 / SCLK) + 15 ns.
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.
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