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TLC2578IPWG4 Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce TLC2578IPWG4
Description  14-Bit Resolution for TLC3574/78, 12-Bit for TLC2574/2578
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TLC2578IPWG4 Fiches technique(HTML) 6 Page - Texas Instruments

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TLC3574, TLC3578, TLC2574, TLC2578
5V ANALOG, 3/5V DIGITAL, 14/12BIT, 200KSPS, 4/8CHANNEL
SERIAL ANALOGTODIGITAL CONVERTERS WITH ±10V INPUTS
SLAS262C − OCTOBER 2000 − REVISED MAY 2003
6
WWW.TI.COM
general electrical characteristics over recommended operating free-air temperature range, single-
ended input, normal long sampling, 200 KSPS, AVDD = 5 V, VREFP = 4 V, VREFM = 0 V,
SCLK frequency = 25 MHz, fixed channel at CONV mode 00, analog input signal source
resistance = 25
Ω (unless otherwise noted)
TLC3574/78 and TLC2574/78
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
Resolution
14
bits
Analog Input
Voltage range
−10
10
V
Selected analog input channel bias current
Selected channel at 10 V
0.8
1.6
mA
Selected analog input channel bias current
Selected channel at –10 V
−1.6
−1.2
mA
Impedance
10
k
Capacitance
30
pF
Reference
VREFP
Positive reference voltage
3.96
4
4.04
V
VREFM
Negative reference voltage
0
AGND
V
Input impedance
No conversion (AVDD = 5V, CS= DVDD,
SCLK=DGND)
100
M
Input impedance
Normal long sampling (AVDD = 5V, CS=DGND,
SCLK = 25 MHz, External conversion clock)
8.3
12.5
k
No conversion (AVDD = 5 V,
SCLK = DGND, CS = DVDD)
1.5
µA
Reference current
Normal long sampling (AVDD = 5 V, CS = DGND,
External conversion clock, SCLK = 25 MHz,
VREF = 5 V)
0.4
0.6
mA
Internal oscillation frequency
DVDD = 2.7 V – 5.5 V
6.5
MHz
Internal OSC, 6.5 MHz minimum
TLC3574/78
2.785
t(conv)
Conversion time
Internal OSC, 6.5 MHz minimum
TLC2574/78
2.015
S
t(conv)
Conversion time
Conversion clock is external source,
TLC3574/78
2.895
µS
Conversion clock is external source,
SCLK = 25 MHz (see Note 1)
TLC2574/78
2.095
Acquisition time
Normal short sampling
1.2
µS
Throughput rate (see Note 2)
Normal long sampling, fixed channel
in mode 00 or 01
200
KSPS
† All typical values are at TA = 25°C.
NOTES:
1. Conversion time t(conv) is (18 × 4 × SCLK) + 15 ns for TLC3574/78. Conversion time is (13 × 4 × SCLK) + 15 ns for TLC2574/78.
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.


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