Datasheet

LTC2379-18
3
237918fa
DYNAMIC ACCURACY
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SINAD Signal-to-(Noise + Distortion) Ratio f
IN
= 2kHz, V
REF
= 5V
l
97.5 101 dB
f
IN
= 2kHz, V
REF
= 5V, (H-Grade)
l
96.8 101 dB
SNR Signal-to-Noise Ratio f
IN
= 2kHz, V
REF
= 5V
f
IN
= 2kHz, V
REF
= 5V, REF/DGC = GND
f
IN
= 2kHz, V
REF
= 2.5V
l
l
l
98.1
96.3
92.3
101.2
99
96
dB
dB
dB
f
IN
= 2kHz, V
REF
= 5V, (H-Grade)
f
IN
= 2kHz, V
REF
= 5V, REF/DGC = GND, (H-Grade)
f
IN
= 2kHz, V
REF
= 2.5V, (H-Grade)
l
l
l
97.7
95.8
92
101.2
99
96
dB
dB
dB
THD Total Harmonic Distortion f
IN
= 2kHz, V
REF
= 5V
f
IN
= 2kHz, V
REF
= 5V, REF/DGC = GND
f
IN
= 2kHz, V
REF
= 2.5V
l
l
l
–120
–119
–107
–106
–103
–99.6
dB
dB
dB
f
IN
= 2kHz, V
REF
= 5V, (H-Grade)
f
IN
= 2kHz, V
REF
= 5V, REF/DGC = GND, (H-Grade)
f
IN
= 2kHz, V
REF
= 2.5V, (H-Grade)
l
l
l
–120
–119
–107
–104
–100
–99.4
dB
dB
dB
SFDR Spurious Free Dynamic Range f
IN
= 2kHz, V
REF
= 5V 122 dB
–3dB Input Bandwidth 34 MHz
Aperture Delay 500 ps
Aperture Jitter 4ps
Transient Response Full-Scale Step 200 ns
The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C and A
IN
= –1dBFS. (Notes 4, 8)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
+ Absolute Input Range (IN
+
) (Note 5)
l
–0.05 V
REF
+ 0.05 V
V
IN
– Absolute Input Range (IN
–
) (Note 5)
l
–0.05 V
REF
+ 0.05 V
V
IN
+ – V
IN
– Input Differential Voltage Range V
IN
= V
IN
+ – V
IN
–
l
–V
REF
+V
REF
V
V
CM
Common-Mode Input Range
l
V
REF
/2–
0.1
V
REF
/2 V
REF
/2+
0.1
V
I
IN
Analog Input Leakage Current
l
±1 µA
C
IN
Analog Input Capacitance Sample Mode
Hold Mode
45
5
pF
pF
CMRR Input Common Mode Rejection Ratio f
IN
= 800kHz 86 dB
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
CONVERTER CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution
l
18 Bits
No Missing Codes
l
18 Bits
Transition Noise 0.8 LSB
RMS
INL Integral Linearity Error (Note 6)
l
–2 ±0.8 2 LSB
DNL Differential Linearity Error
l
–0.9 ±0.2 0.9 LSB
BZE Bipolar Zero-Scale Error (Note 7)
l
–9 0 9 LSB
Bipolar Zero-Scale Error Drift 3 mLSB/°C
FSE Bipolar Full-Scale Error (Note 7)
l
–40 ±7 40 LSB
Bipolar Full-Scale Error Drift ±0.05 ppm/°C
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)