参数资料
型号: TLV2553IPWRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封装: GREEN, PLASTIC, TSSOP-20
文件页数: 26/29页
文件大小: 603K
代理商: TLV2553IPWRG4
TLV2553
SLAS354B – SEPTEMBER 2001 – REVISED SEPTEMBER 2002
6
www.ti.com
external reference specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference input voltage REF
VCC = 4.5 V to 5.5 V
–0.1
0
0.1
V
Reference input voltage, REF–
VCC = 2.7 V to 3.6 V
–0.1
0
0.1
V
Reference input voltage REF+
VCC = 4.5 V to 5.5 V
2
VCC
V
Reference input voltage, REF+
VCC = 2.7 V to 3.6 V
2
VCC
V
External reference input voltage difference,
VCC = 4.5 V to 5.5 V
1.9
VCC
V
g,
(REF+) – (REF–)
VCC = 2.7 V to 3.6 V
1.9
VCC
V
External reference supply current
CS at 0 V
VCC = 4.5 V to 5.5 V
0.94
mA
External reference supply current
CS at 0 V
VCC = 2.7 V to 3.6 V
0.62
mA
VCC =5V
Static
1
M
Reference input impedance
VCC = 5 V
During sampling/conversion
6
9
k
Reference input impedance
VCC =2 7V
Static
1
M
VCC = 2.7 V
During sampling/conversion
6
9
k
All typical values are at TA = 25°C.
NOTE: Add a 0.1-
F capacitor between REF+ and REF– pins when external reference is used.
operating characteristics over recommended operating free-air temperature range, VREF+ = 5 V,
I/O CLOCK frequency = 15 MHz when VCC = 5 V, VREF+ = 2.5 V, I/O CLOCK frequency = 10 MHz when
VCC = 2.7 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INL
Integral linearity error (see Note 3)
–1
1
LSB
DNL
Differential linearity error
–1
1
LSB
EO
Offset error (see Note 4)
See Note 2
–2
2
mV
EG
Gain error (see Note 4)
See Note 2
–3
3
mV
ET
Total unadjusted error (see Note 5)
±1.5
LSB
Address data input = 1011
2048
Self-test output code (see Table 2 and Note 6)
Address data input = 1100
0
Address data input = 1101
4095
All typical values are at TA = 25°C.
NOTES:
2. Analog input voltages greater than the voltage applied to REF+ convert as all ones (111111111111), while input voltages less than
the voltage applied to REF– convert as all zeros (000000000000).
3. Linearity error is the maximum deviation from the best straight line through the A/D transfer characteristics.
4. Gain error is the difference between the actual midstep value and the nominal midstep value in the transfer diagram at the specified
gain point after the offset error has been adjusted to zero. Offset error is the difference between the actual midstep value and the
nominal midstep value at the offset point.
5. Total unadjusted error comprises linearity, zero-scale, and full-scale errors.
6. Both the input address and the output codes are expressed in positive logic.
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