Datasheet

3
LTC1408
1408fa
I TER AL REFERE CE CHARACTERISTICS
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The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. With internal reference, V
DD
= 3V, V
DD
= V
CC
= 3V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SINAD Signal-to-Noise Plus 100kHz Input Signal ● 73 76 dB
Distortion Ratio 300kHz Input Signal 76 dB
100kHz Input Signal, External V
REF
= 3.3V, V
DD
≥ 3.3V 79 dB
300kHz Input Signal, External V
REF
= 3.3V, V
DD
≥ 3.3V 79 dB
THD Total Harmonic 100kHz First 5 Harmonics ● –80 –90 dB
Distortion 300kHz First 5 Harmonics –86 dB
SFDR Spurious Free 100kHz Input Signal 90 dB
Dynamic Range 300kHz Input Signal 86 dB
IMD Intermodulation 0.625V
P-P
, 833kHz into CH0+, 0.625V
P-P
, 841kHz into CH0–. –80 dB
Distortion Bipolar Mode. Also Applicable to Other Channels
Code-to-Code V
REF
= 2.5V (Note 17) 0.7 LSB
RMS
Transition Noise
Full Power Bandwidth V
IN
= 2.5V
P-P
, SDO = 11585LSB
P-P
(–3dBFS) (Note 15) 50 MHz
Full Linear Bandwidth S/(N + D) ≥ 68dB, Bipolar Differential Input 5 MHz
T
A
= 25°C. V
DD
= V
CC
= 3V.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 2.5 V
V
REF
Output Tempco 15 ppm/°C
V
REF
Line Regulation V
DD
= 2.7V to 3.6V, V
REF
= 2.5V 600 µV/V
V
REF
Output Resistance Load Current = 0.5mA 0.2 Ω
V
REF
Settling Time 2ms
The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= V
CC
= 3V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
DD
= 3.3V ● 2.4 V
V
IL
Low Level Input Voltage V
DD
= 2.7V ● 0.6 V
I
IN
Digital Input Current V
IN
= 0V to V
DD
● ±10 µA
C
IN
Digital Input Capacitance 5pF
V
OH
High Level Output Voltage V
DD
= 3V, I
OUT
= –200µA ● 2.5 2.9 V
V
OL
Low Level Output Voltage V
DD
= 2.7V, I
OUT
= 160µA 0.05 V
V
DD
= 2.7V, I
OUT
= 1.6mA ● 0.4 V
I
OZ
Hi-Z Output Leakage D
OUT
V
OUT
= 0V and V
DD
● ±10 µA
C
OZ
Hi-Z Output Capacitance D
OUT
1pF
I
SOURCE
Output Short-Circuit Source Current V
OUT
= 0V, V
DD
= 3V 20 mA
I
SINK
Output Short-Circuit Sink Current V
OUT
= V
DD
= 3V 15 mA
DY A IC ACCURACY
U
W
DIGITAL I PUTS A D DIGITAL OUTPUTS
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