Datasheet

LTC2308
3
2308fb
PARAMETER CONDITIONS MIN TYP MAX UNITS
Bipolar Full-Scale Error External Reference (Note 8)
l
±1 ±9 LSB
Bipolar Full-Scale Error Drift External Reference 0.05 LSB/°C
Bipolar Full-Scale Error Match
l
±0.5 ±3 LSB
Unipolar Full-Scale Error External Reference (Note 8)
l
±1.5 ±8 LSB
Unipolar Full-Scale Error Drift External Reference 0.05 LSB/°C
Unipolar Full-Scale Error Match
l
±0.4 ±3 LSB
CONVERTER AND MULTIPLEXER CHARACTERISTICS
The l denotes the specifi cations
which apply over the full operating temperature range, otherwise specifi cations are at T
A
= 25°C. (Notes 4, 5)
ANALOG INPUT
The l denotes the specifi cations which apply over the full operating temperature range, otherwise
specifi cations are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
+
Absolute Input Range (CH0 to CH7) (Note 9)
l
–0.05 REFCOMP V
V
IN
–
Absolute Input Range (CH0 to CH7,
COM)
Unipolar (Note 9)
Bipolar (Note 9)
l
l
–0.05
–0.05
0.25 • REFCOMP
0.75 • REFCOMP
V
V
V
IN
+
– V
IN
–
Input Differential Voltage Range V
IN
= V
IN
+
– V
IN
–
(Unipolar)
V
IN
= V
IN
+
– V
IN
–
(Bipolar)
l
l
0 to REFCOMP
±REFCOMP/2
V
V
I
IN
Analog Input Leakage Current
l
±1 μA
C
IN
Analog Input Capacitance Sample Mode
Hold Mode
55
5
pF
pF
CMRR Input Common Mode Rejection Ratio 70 dB
DYNAMIC ACCURACY
The l denotes the specifi cations which apply over the full operating temperature range,
otherwise specifi cations are at T
A
= 25°C and A
IN
= –1dBFS. (Notes 4, 10)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SINAD Signal-to-(Noise + Distortion) Ratio f
IN
= 1kHz
l
71 73.3 dB
SNR Signal-to-Noise Ratio f
IN
= 1kHz
l
71 73.4 dB
THD Total Harmonic Distortion f
IN
= 1kHz, First 5 Harmonics
l
–90 –78 dB
SFDR Spurious Free Dynamic Range f
IN
= 1kHz
l
80 90 dB
Channel-to-Channel Isolation f
IN
= 1kHz –109 dB
Full Linear Bandwidth (Note 11) 700 kHz
–3dB Input Linear Bandwidth 25 MHz
Aperture Delay 13 ns
Transient Reponse Full-Scale Step 240 ns