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参数资料
型号： LOG114AIRGVR
厂商： TEXAS INSTRUMENTS INC
元件分类： 模拟运算功能
英文描述： LOG OR ANTILOG AMPLIFIER, PQCC16
封装： 4 X 4 MM, GREEN, PLASTIC, QFN-16
文件页数： 24/29页
文件大小： 637K
代理商： LOG114AIRGVR
LOG114
SBOS301A MAY 2004 REVISED MARCH 2007
www.ti.com
4
ELECTRICAL CHARACTERISTICS: VS =
+5V (continued)
Boldface limits apply over the specified temperature range, TA = 5°C to +75°C.
All specifications at TA = +25°C, RVLOGOUT = 10k, VCM = GND, unless otherwise noted.
LOG114
PARAMETER
UNITS
MAX
TYP
MIN
CONDITIONS
TOTAL ERROR(4, 5)
See Typical Characteristics
FREQUENCY RESPONSE, Core Log(6)
BW, 3dB I1 or I2 =
IAC = 10% of IDC value, IREF = 1A
1nA
5
kHz
10nA
12
kHz
100nA
120
kHz
1
A
2.3
MHz
10
A to 1mA (ratio 1:100)
> 5
MHz
1mA to 3.5mA (ratio 1:3.5)
> 5
MHz
3.5mA to 10mA (ratio 1:2.9)
> 5
MHz
Step Response
IREF = 1A
Increasing (I1 or I2)
8nA to 240nA (ratio 1:30)
0.7
s
10nA to 100nA (ratio 1:10)
1.5
s
10nA to 1
A (ratio 1:100)
0.15
s
10nA to 10
A (ratio 1:1k)
0.07
s
10nA to 1mA (ratio 1:100k)
0.06
s
1mA to 10mA (ratio 1:10)
1
s
Decreasing (I1 or I2)
IREF = 1A
8nA to 240nA (ratio 1:30)
1
s
10nA to 100nA (ratio 1:10)
2
s
10nA to 1
A (ratio 1:100)
0.25
s
10nA to 10
A (ratio 1:1k)
0.05
s
10nA to 1mA (ratio 1:100k)
0.03
s
1mA to 10mA (ratio 1:10)
1
s
VOLTAGE REFERENCE
Bandgap Voltage
2.5
V
Error, Initial
±0.15
±1
%
vs Temperature
±25
ppm/
°C
vs Supply
VS = ±4.5V to ±5.5V
±30
ppm/V
vs Load
IO = ±2mA
±200
ppm/mA
Short-Circuit Current
±10
mA
POWER SUPPLY
Dual Supply Operating Range
VS
±2.4
±5.5
V
Quiescent Current
IQ
IO = 0
±10
±15
mA
TEMPERATURE RANGE
Specification, TMIN to TMAX
5
+75
°C
Operating
40
+85
°C
Storage
55
+125
°C
Thermal Resistance,
qJA
62
°C/W
(1) Log conformity error is peak deviation from the best-fit straight line of VO vs Log (I1/I2) curve expressed as a percent of peak-to-peak full-scale output. Scale factor,
K, equals 0.375V output per decade of input current.
(2) Scale factor of core log function is trimmed to 0.375V output per decade change of input current.
(3) Specified by design.
(4) Worst-case total error for any ratio of I1/I2, as the largest of the two errors, when I, and I2 are considered separately.
(5) Total error includes offset voltage, bias current, gain, and log conformity.
(6) Small signal bandwidth (3dB) and transient response are a function of the level of input current. Smaller input current amplitude results in lower bandwidth.
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