LTC2435_15 Datasheet, PDF (3/42 Pages) Linear Technology – 20-Bit No Latency ADCs with Differential Input and Differential Reference

LTC2435/LTC2435-1
Converter Characteristics The l denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. (Notes 3, 4)
PARAMETER
CONDITIONS
MIN TYP MAX
Input Common Mode Rejection DC
Input Common Mode Rejection
60Hz ± 2% (LTC2435)
Input Common Mode Rejection
50Hz ± 2% (LTC2435)
2.5V
GND
≤
≤
REF⁺
IN^– =
≤INV_+C≤C,VR_CE_CF(^–_N=otGeN5D) ,
2.5V
GND
≤
≤
RINE_–F⁺₌ ≤INV_+C≤C,VR_CE_CF, ^–_{(N=oGteNsD5, ,}
7)
2.5V
GND
≤
≤
RINE_–F⁺₌ ≤INV_+C≤C,VR_CE_CF, ^–_{(N=oGteNsD5, ,}
8)
● 110 120
● 140
● 140
Input Normal Mode Rejection
60Hz ± 2% (LTC2435)
(Notes 5, 7)
● 110 120
Input Normal Mode Rejection
50Hz ±2% (LTC2435)
(Notes 5, 8)
● 110 120
Input Common Mode Rejection
49Hz to 61.2Hz (LTC2435-1)
2.5V
GND
≤
≤
REF⁺
IN^– =
≤INV_+C≤C,VR_CE_CF, ^–_{(N=oGteNsD5,,}
7)
● 120
Input Normal Mode Rejection
49Hz to 61.2Hz (LTC2435-1)
F_O = GND (Note 5)
● 87
Input Normal Mode Rejection
External Clock f_EOSC/2560 ±14%
External Oscillator (Note 5)
● 87
Input Normal Mode Rejection
External Clock f_EOSC/2560 ±4%
Reference Common Mode
Rejection DC
Power Supply Rejection, DC
Power Supply Rejection, 60Hz ±2%
External Oscillator (Note 5)
2.5V
V_REF
≤
=
REF⁺
2.5V,
≤INV_–C=C,ING₊N=D
≤ REF^– ≤ 2.5V,
GND (Note 5)
REF⁺ = V_CC, REF^– = GND, IN^– = IN⁺ = GND
REF⁺ = 2.5V, REF^– = GND, IN^– = IN⁺ = GND, (Note 7)
● 110 120
● 130 140
100
120
Power Supply Rejection, 50Hz ±2% REF⁺ = 2.5V, REF^– = GND, IN^– = IN⁺ = GND, (Note 8)
120
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Analog Input And Reference The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IN⁺
Absolute/Common Mode IN⁺ Voltage
IN^–
Absolute/Common Mode IN^– Voltage
● GND – 0.3V
● GND – 0.3V
V_CC + 0.3V
V
V_CC + 0.3V
V
V_IN
Input Differential Voltage Range
(IN⁺ – IN^–)
● –V_REF/2
V_REF/2
V
REF⁺
Absolute/Common Mode REF⁺ Voltage
REF^–
Absolute/Common Mode REF^– Voltage
●
0.1
● GND
V_CC
V
V_CC – 0.1V
V
V_REF
Reference Differential Voltage Range
(REF⁺ – REF^–)
●
0.1
V_CC
V
C_S (IN⁺)
C_S (IN^–)
C_S (REF⁺)
C_S (REF^–)
I_{DC_LEAK} (IN⁺)
I_{DC_LEAK} (IN^–)
I_{DC_LEAK} (REF⁺)
I_{DC_LEAK} (REF^–)
IN⁺ Sampling Capacitance
IN^– Sampling Capacitance
REF⁺ Sampling Capacitance
REF^– Sampling Capacitance
IN⁺ DC Leakage Current
IN^– DC Leakage Current
REF⁺ DC Leakage Current
REF^– DC Leakage Current
1.5
pF
1.5
pF
1.5
pF
1.5
pF
CS = V_CC, IN⁺ = GND
●
–10
1
10
nA
CS = V_CC, IN^– = V_CC
●
–10
1
10
nA
CS = V_CC, REF⁺ = V_CC
●
–10
1
10
nA
CS = V_CC, REF^– = GND
●
–10
1
10
nA
For more information www.linear.com/LTC2435
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