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参数资料
型号： TLC2558IPWR
厂商： TEXAS INSTRUMENTS INC
元件分类： ADC
英文描述： 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封装： GREEN, PLASTIC, TSSOP-20
文件页数： 15/48页
文件大小： 1072K
代理商： TLC2558IPWR
TLC2554, TLC2558
5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS220A –JUNE 1999
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
reference specifications (0.1
F and 10 F between REFP and REFM pins)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference input voltage, REFP
VCC = 4.5 V
VCC
V
Input impedance
VCC =5 5V
CS = 1,
SCLK = 0, (off)
100
M
Input impedance
VCC = 5.5 V
CS = 0,
SCLK = 20 MHz (on)
20
25
k
Input voltage difference, REFP – REFM
VCC = 4.5 V
2
VCC
V
Internal reference voltage,REFP – REFM
VCC = 5.5 V Reference select = internal
3.85
4
4.15
V
Internal reference start up time
VCC = 5.5 V 10 F
20
ms
Reference temperature coefficient
VCC = 4.5 V
16
40
PPM/
°C
operating characteristics over recommended operating free-air temperature range, VCC = VREFP = 4.5 V,
SCLK frequency = 20 MHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Integral linearity error (INL) (see Note 4)
±1
LSB
Differential linearity error (DNL)
See Note 3
±1
LSB
EO
Offset error (see Note 5)
See Note 3
±2.5
LSB
EG
Gain error (see Note 5)
See Note 3
±1
±2
LSB
ET
Total unadjusted error (see Note 6)
±2
LSB
SDI = B000h
800h
(2048D)
Self-test output code (see Table 1 and Note 7)
SDI = C000h
000h
(0D)
SDI = D000h
FFFh
(4095D)
tconv
Conversion time
External SCLK
(14XDIV)
fSCLK
tsample
Sampling time
At 1 k
600
ns
tt(I/O)
Transition time for EOC, INT
50
ns
tt(CLK)
Transition time for SDI, SDO
25
ns
All typical values are at TA = 25°C.
NOTES:
3. Analog input voltages greater than that applied to REFP convert as all ones (111111111111), while input voltages less than that
applied to REFM convert as all zeros (0000000000). The device is functional with reference down to 2 V (VREFP – VREFM);
however, the electrical specifications are no longer applicable.
4. Linear error is the maximum deviation from the best straight line through the A/D transfer characteristics.
5. Zero error is the difference between 000000000000 and the converted output for zero input voltage: full-scale error is the difference
between 111111111111 and the converted output for full-scale input voltage.
6. Total unadjusted error comprises linearity, zero, and full-scale errors.
7. Both the input data and the output codes are expressed in positive logic.
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