参数资料
型号: 78M6631-EVM-1
厂商: Maxim Integrated Products
文件页数: 19/30页
文件大小: 0K
描述: EVAL BOARD 78M6631
标准包装: 1
系列: *
DS_6631_056
78M6631 Data Sheet
2.4.7 Temperature Sensor
Table 11 shows the performance for the temperature sensor. The LSB values do not include the 8-bit left
shift at CE input.
Table 11: Temperature Sensor Performance Specifications
Parameter
Condition
Min
Typ
Max
Unit
Nominal relationship: N(T) = S n *(T-T n ) + N n , T n = 22oC
S n ? ? 0 . 00107 ? ?
? L ?
? 3 ?
Nominal
Sensitivity (S n )
?
3
[ M26MHZ, M40MH ] =
[00], [01], or [11]
[ M26MHZ , M40MHZ ] =
[10]
FIR_LEN = 0 (L=138)
FIR_LEN =1 (L=288)
FIR_LEN =0 (L=186)
-104
-947
-255
LSB/oC
N n ? 0 . 510 ? ?
? L ?
? 3 ?
Nominal Offset
(N n ) 4
?
3
[ M26MHZ, M40MH ] =
[00], [01], or [11]
[ M26MHZ , M40MHZ ] =
[10]
FIR_LEN =0 (L=138)
FIR_LEN =1 (L=288)
FIR_LEN =0 (L=186)
49641
451200
121500
LSB
? ( N ( T ) ? N n )
S n
? T n ?
Temperature Error 2
ERR ? T ? ?
?
?
?
T n = 22°C,
T = -40oC to +85oC
-10 1
+10 1
oC
1
Guaranteed by design; not production tested.
N n is measured at T n during measurement calibration and is stored in MPU or CE for use in temperature
2
calculations.
2.4.8 VREF
Table 12 shows the performance specifications for VREF. Unless otherwise specified, VREF_DIS = 0.
Table 12: VREF Performance Specifications
Parameter
VREF output voltage, VREF(22)
Condition
T A = +22oC
Min
1.193
Typ
1.195
Max
1.197
Unit
V
VREF chop step
40
mV
VREF power supply sensitivity
Δ VREF/ Δ V3P3A
V3P3A = 3.0 to 3.6 V
-1.5
+1.5
mV/V
VREF input impedance
VREF output impedance
VREF_DIS = 1,
VREF = 1.3 to 1.7 V
CAL =1,
I LOAD = 10 ? A, -10 ? A
100
2.5
k ?
k ?
VNOM definition 2
VNOM temperature coefficients:
TC1
TC2
VREF(T) deviation from VNOM(T)
VNOM ( T ) ? VREF ( 22 ) ? ( T ? 22 ) TC 1 ? ( T ? 22 ) 2 TC 2
3.18·(52.46- TRIMT )
-0.444
V
? V/oC
? V/°C 2
VREF ( T ) ? VNOM ( T )
10 6
-40 1
+40 1
ppm/oC
VNOM ( T )
max( T ? 22 , 40 )
VREF aging
? 25
ppm/year
1
2
Guaranteed by design; not production tested.
This relationship describes the nominal behavior of VREF at different temperatures.
Rev 2
19
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