參數(shù)資料
型號(hào): LTKA00CN8
廠(chǎng)商: Linear Technology
文件頁(yè)數(shù): 5/8頁(yè)
文件大小: 0K
描述: IC THERMOCOUPLE AMPLIFIER 8-DIP
標(biāo)準(zhǔn)包裝: 50
系列: LT®
類(lèi)型: 熱電偶調(diào)節(jié)器
輸入類(lèi)型: 電壓
輸出類(lèi)型: 熱電偶
電流 - 電源: 800µA
安裝類(lèi)型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
5
LTK001
001fa
AMPLIFIER (LTKA0x)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Offset Voltage
10
35
V
Input 0ffset Voltage Drift with Temperature
(Note 6)
0.3
1.5
V/°C
Input Bias Current
0°C ≤ TA ≤ 70°C
± 200
± 600
pA
– 55°C ≤ TA ≤ 125°C
± 300
± 1500
pA
Input Bias Current Drift with Temperature
(Note 6)
1
5
pA/°C
lnput 0ffset Current
0°C ≤ TA ≤ 70°C
± 100
± 500
pA
– 55°C ≤ TA ≤ 125°C
± 200
± 700
pA
lnput Offset Current Drift with Temperature
(Note 6)
0.6
4
pA/°C
Large Signal Voltage Gain
RL = 10k
400
2000
V/mV
Common Mode Rejection Ratio
VCM = ±13.5V
106
130
dB
Power Supply Rejection Ratio
± 2.5V ≤ VS ≤ ± 20V (Note 5)
106
125
dB
Common Mode Input Voltage Range
Notes 6, 7
Above V
0.75
V
Below V+
1.0
V
Output Voltage Swing (Notes 6, 8)
Referred to Supplies
IOUT = 0.1mA
0.8
V
IOUT = 1mA
1.1
V
Supply Current
400
800
A
Supply Voltage Range
Total V + to V Voltage
4.5
40
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The inputs of the LTKA0x amplifier are clamped with diodes, so a
differential voltage rating does not apply.
Note 3: Total temperature error is the overall error at 25°C taking into
account the offset of the amplifier, the offset at the compensator 10mV/°C
output, and the error in the compensator divider network. Warmup drift is
not included.
Note 4: Slope error is the increase in total temperature error as ambient
temperature is increased. It is guaranteed by design and by other tests,
but is not tested directly.
Note 5: This is a worst-case limit assuming that any or all supply voltages
change.
Note 6: Guaranteed, but not tested.
Note 7: By referring common mode range to the supplies, the range
referred to ground can be quickly calculated for any given supply voltage.
With a single 5V supply, for instance, which has a worst-case low value of
4.7V, the upper common mode limit is 4.7V – 1V = 3.7V. The lower
common mode limit is 0V + 0.75V = 0.75V. With ±15V supplies, the limits
would be 14V and –14.25V, respectively. Common mode range has a
temperature sensitivity of ≈ 2mV/°C.
Note 8: Absolute output voltage swing is calculated by subtracting the
given limits from actual supply voltage. These limits indicate the point
where offset voltage has changed suddenly by 5V.
Note 9: Temperature error is defined as the deviation from the following
formula:
VOUT = α(T) + α(T – 25°C)2
α = Typical thermocouple Seebeck coefficient as follows,
E = 60.9V/°C, J = 51.7V/°C, K, T = 40.6V/°C, R, S = 5.95V/°C.
α = 10mV/°C at the 10mV output.
= Nonlinearity coefficient built into the LT1025 to help compensate
for the nonlinearities of thermocouples.
= 5.5 x 10 –4, generating
0.34°C bow for 25°C temperature change, and 1.36°C bow for 50°C
change.
Note 10: Temperature error at the individual outputs is the sum of the
10mV/°C output error plus the resistor divider error.
Note 11: Line and load regulation do not take into account the effects of
self-heating. Output changes due to self-heating can be calculated as
follows:
VOUT (Line) = VIN(Iq + Iload)(150°C/W)
VOUT (Load) = (Iload)(VIN)(150°C/W)
= LT1025 supply current
Load regulation is 30A ≤ IO ≤ 1mA for TA ≤ 0°C.
Note 12: Larger errors with type R and S thermocouples are due mostly to
35V offset of the amplifier. This error can be reduced to 5V max with the
LTC
1050 or LTC1052 operational amplifiers.
ELECTRICAL CHARACTERISTICS
The
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VS = ±15V, VCM = 0V, TJ = 25°C unless otherwise noted.
(Amplifier LTKA0x)
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