參數(shù)資料
型號： LOG114AIRGVT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬運算功能
英文描述： LOG OR ANTILOG AMPLIFIER, PQCC16
封裝： 4 X 4 MM, GREEN, PLASTIC, QFN-16
文件頁數(shù)： 23/29頁
文件大小： 637K
代理商： LOG114AIRGVT
LOG114
SBOS301A MAY 2004 REVISED MARCH 2007
www.ti.com
3
ELECTRICAL CHARACTERISTICS: VS =
+5V
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
CONDITIONS
MIN
TYP
MAX
UNITS
CORE LOG FUNCTION
IIN/VOUT Equation
VO = (0.375V) Log (I1/I2)
V
LOG CONFORMITY ERROR(1)
Initial
1nA to 100
A (5 decades)
0.1
0.2
%
0.009
0.017
dB
100pA to 3.5mA (7.5 decades)
0.9
%
0.08
dB
1mA to 10mA
See Typical Characteristics
Over Temperature
1nA to 100
A (5 decades)
0.1
0.4
%
100pA to 3.5mA (7.5 decades)
0.5
%
1mA to 10mA
See Typical Characteristics
%
TRANSFER FUNCTION (GAIN)(2)
Initial Scaling Factor
100pA to 10mA
0.375
V/decade
Scaling Factor Error
1nA to 100
A
0.4
±2.5
%
0.035
0.21
dB
Over Temperature
TMIN to TMAX
1.5
±3.5
%
+15
°C to +50°C
0.7
±3
%
INPUT, A1 and A2
Offset Voltage
VOS
±1
±4
mV
vs Temperature
dV/dT
TMIN to TMAX
+15
V/°C
vs Power Supply
PSRR
VS = ±2.25V to ±5.5V
75
400
V/V
Input Bias Current
IB
±5
pA
vs Temperature
TMIN to TMAX
Doubles every 10
°C
Input Common-Mode Voltage Range
VCM
(V)+1.5 to
(V+)1.5
V
Voltage Noise
en
f = 0.1Hz to 10kHz
3
Vrms
f = 1kHz
30
nV/
√Hz
Current Noise
in
f = 1kHz
4
fA/
√Hz
OUTPUT, A3 (VLOGOUT)
Output Offset, VOSO, Initial
VOSO
±11
±50
mV
Over Temperature
TMIN to TMAX
±15
±65
mV
Full-Scale Output (FSO)(3)
(V) + 0.6
(V+) 0.6
V
Gain Bandwidth Product
GBW
IIN = 1A
50
MHz
Short-Circuit Current
ISC
±18
mA
Capacitive Load
100
pF
OP AMP, A4 and A5
Input Offset Voltage
VOS
±250
±1000
V
vs Temperature
dV/dT
TMIN to TMAX
±2
V/°C
vs Supply
PSRR
VS = ±4.5V to ±5.5V
30
250
V/V
vs Common-Mode Voltage
CMRR
74
dB
Input Bias Current
IB
1
A
Input Offset Current
IOS
±0.05
A
Input Voltage Range
(V)
(V+) 2
V
Input Noise f = 0.1Hz to 10Hz
2
VPP
f = 1kHz
13
nV/
√Hz
Current Noise
in
2
pA/
√Hz
Open-Loop Voltage Gain
AOL
100
dB
Gain Bandwidth Product
GBW
15
MHz
Slew Rate
SR
5
V/
s
Settling Time 0.01%
tS
G = 1, 3V Step, CL = 100pF
1.5
s
Rated Output
(V) + 0.5
(V+) 0.5
V
Short-Circuit Current
ISC
+4/10
mA
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