Datasheet
LTC2970/LTC2970-1
3
29701fc
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power-Supply Characteristics
I
V12
12V
IN
Supply Current V
12VIN
= 12V, V
DD
Floating
●
4.24 7.5 mA
I
DD
V
DD
Supply Current V
DD
= 5V, V
12VIN
= V
DD
●
3.7 5 mA
V
LKO
V
DD
Undervoltage Lockout V
DD
Ramping-Down, V
12VIN
= V
DD
●
3.7 4.14 4.4 V
V
DD
Undervoltage Lockout Hysteresis 118 mV
V
DD
Supply Input Operating Range
●
4.5 5.75 V
Regulator Output Voltage 8V ≤ V
12VIN
≤ 15V, –1mA ≤ I
VDD
≤ 0
●
4.75 4.95 5.25 V
Regulator Output Voltage
Temperature Coeffi cient
10 ppm/°C
Regulator Output Voltage Load
Regulation
–1mA ≤ I
VDD
≤ 0 160 ppm/mA
Regulator Line Regulation 8V ≤ V
12VIN
≤ 15V, I
VDD
= 0mA 80 ppm/V
Regulator Output Short-Circuit Current V
12VIN
= 12V, V
DD
= 0V
●
–5 –34 –63 mA
V
12VIN
12V
IN
Supply Operating Range
●
815V
Voltage Reference Characteristics
V
REF
Reference Output Voltage 1.229 V
Reference Voltage Temperature
Coeffi cient
2 ppm/°C
Reference Overdrive Voltage Input
Range
●
11.5V
ADC Characteristics
N_ADC Resolution N_ADC = 8.192V/16384 500 μV/LSB
TUE_ADC Total Unadjusted Error V
IN
= 3V, V
IN
= V
INn_xP
– V
INn_xM
(Note 3)
●
±0.5 %
INL_ADC Integral Nonlinearity (Note 4)
●
–4.5 2 4.5 LSB
DNL_ADC Differential Nonlinearity (Note 7)
●
±0.5 LSB
V
IN_ADC
Input Voltage Range
●
06V
V
OS_ADC
Offset Error
●
–1000 –316 1000 μV
Offset Error Drift 0.19 μV/°C
GAIN_ADC Gain Error Full-Scale V
IN
= 6V
●
±0.4 %
Gain Error Drift 3 ppm/°C
T
CONV_ADC
Conversion Time 33.3 ms
C
IN_ADC
Input Sampling Capacitance 3pF
F
IN_ADC
Input Sampling Frequency 61.4 kHz
I
LEAK_ADC
Input Leakage Current 0V < V
IN
< 6V
●
±0.1 μA
IDAC Output Current Characteristics
N_I
OUT
Resolution (Guaranteed Monotonic) 8 Bits
INL_I
OUT
Integral Nonlinearity V
IOUTn
< V
DD
– 1.5V
●
±1 LSB
DNL_I
OUT
Differential Nonlinearity V
IOUTn
< V
DD
– 1.5V
●
±1 LSB
I
FS-
I
OUT
Full-Scale Output Current V
IOUTn
< V
DD
– 1.5V, DAC Code = 'hff
●
–236 –255 –276 μA
I
DRIFT-
I
OUT
Output Current Drift DAC Code = 'hff 32 ppm/°C
I
OS-
I
OUT
Offset Current DAC Code = 'h00
●
±0.1 μA
ELECTRICAL CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
12VIN
= 12V, V
DD
and REF pins fl oating unless otherwise indicated,
C
VDD
= 100nF and C
REF
= 100nF.