LTC2970C Просмотр технического описания (PDF) - Linear Technology
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LTC2970C Datasheet PDF : 36 Pages
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LTC2970/LTC2970-1
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V12VIN = 12V, VDD and REF pins floating unless otherwise indicated,
CVDD = 100nF and CREF = 100nF.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Power-Supply Characteristics
IV12
12VIN Supply Current
V12VIN = 12V, VDD Floating
IDD
VDD Supply Current
VDD = 5V, V12VIN = VDD
VLKO
VDD Undervoltage Lockout
VDD Ramping-Down, V12VIN = VDD
VDD Undervoltage Lockout Hysteresis
VDD
Supply Input Operating Range
Regulator Output Voltage
8V ≤ V12VIN ≤ 15V, –1mA ≤ IVDD ≤ 0
Regulator Output Voltage
Temperature Coefficient
●
4.24
7.5
mA
●
3.7
5
mA
● 3.7
4.14
4.4
V
118
mV
● 4.5
5.75
V
● 4.75 4.95 5.25
V
10
ppm/°C
Regulator Output Voltage Load
Regulation
–1mA ≤ IVDD ≤ 0
160
ppm/mA
Regulator Line Regulation
8V ≤ V12VIN ≤ 15V, IVDD = 0mA
Regulator Output Short-Circuit Current V12VIN = 12V, VDD = 0V
V12VIN
12VIN Supply Operating Range
Voltage Reference Characteristics
● –5
●
8
80
–34
–63
15
ppm/V
mA
V
VREF
Reference Output Voltage
Reference Voltage Temperature
Coefficient
1.229
2
V
ppm/°C
Reference Overdrive Voltage Input
Range
●
1
1.5
V
ADC Characteristics
N_ADC
Resolution
N_ADC = 8.192V/16384
500
μV/LSB
TUE_ADC
INL_ADC
Total Unadjusted Error
Integral Nonlinearity
VIN = 3V, VIN = VINn_xP – VINn_xM (Note 3)
●
±0.5
%
(Note 4)
● –4.5
2
4.5
LSB
DNL_ADC Differential Nonlinearity
(Note 7)
●
±0.5
LSB
VIN_ADC
VOS_ADC
Input Voltage Range
Offset Error
Offset Error Drift
●
0
6
● –1000 –316 1000
0.19
V
μV
μV/°C
GAIN_ADC Gain Error
Gain Error Drift
Full-Scale VIN = 6V
●
±0.4
%
3
ppm/°C
TCONV_ADC Conversion Time
CIN_ADC
Input Sampling Capacitance
FIN_ADC
Input Sampling Frequency
ILEAK_ADC Input Leakage Current
IDAC Output Current Characteristics
0V < VIN < 6V
33.3
ms
3
pF
61.4
kHz
●
±0.1
μA
N_IOUT
INL_IOUT
DNL_IOUT
IFS-IOUT
IDRIFT-IOUT
IOS-IOUT
Resolution (Guaranteed Monotonic)
Integral Nonlinearity
Differential Nonlinearity
Full-Scale Output Current
Output Current Drift
Offset Current
VIOUTn < VDD – 1.5V
VIOUTn < VDD – 1.5V
VIOUTn < VDD – 1.5V, DAC Code = 'hff
DAC Code = 'hff
DAC Code = 'h00
8
●
±1
●
±1
● –236 –255 –276
32
●
±0.1
Bits
LSB
LSB
μA
ppm/°C
μA
29701fc
3
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