Datasheet

3
LTC1278
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 100kHz Input Signal ● 70 72 dB
250kHz Input Signal 70 dB
THD Total Harmonic Distortion 100kHz Input Signal ● –80 –78 dB
First 5 Harmonics 250kHz Input Signal –74 dB
Peak Harmonic or Spurious Noise 100kHz Input Signal ● –84 –78 dB
250kHz Input Signal –74 dB
IMD Intermodulation Distortion f
IN1
= 99.37kHz, f
IN2
= 102.4kHz –82 dB
f
IN1
= 249.37kHz, f
IN2
= 252.4kHz –70 dB
Full Power Bandwidth 4 MHz
Full Linear Bandwidth (S/(N + D) ≥ 68dB) 350 kHz
(Note 5)
LTC1278-4/LTC1278-5
ACCURACY
IC
DY
U
W
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 2.400 2.420 2.440 V
V
REF
Output Tempco I
OUT
= 0 ● ±10 ±45 ppm/°C
V
REF
Line Regulation 4.95V ≤ V
DD
≤ 5.25V 0.01 LSB/V
–5.25V ≤ V
SS
≤ –4.95V 0.01 LSB/V
V
REF
Load Regulation 0V ≤ |I
OUT
| ≤ 1mA 2 LSB/mA
LTC1278-4/LTC1278-5
I TER AL REFERE CE CHARACTERISTICS
U
UU
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
DD
= 5.25V ● 2.4 V
V
IL
Low Level Input Voltage V
DD
= 4.95V ● 0.8 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
= 4.95V
I
O
= –10µA 4.7 V
I
O
= –200µA ● 4V
V
OL
Low Level Output Voltage V
DD
= 4.95V
I
O
= 160µA 0.05 V
I
O
= 1.6mA ● 0.10 0.4 V
I
OZ
High Z Output Leakage D11 to D0 V
OUT
= 0V to V
DD
, CS High ● ±10 µA
C
OZ
High Z Output Capacitance D11 to D0 CS High (Note 9 ) ● 15 pF
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
DD
10 mA
LTC1278-4/LTC1278-5
(Note 5)
DIGITAL I PUTS A D DIGITAL OUTPUTS
U
U