Datasheet

3
LTC1420
1420fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CM
Output Voltage I
OUT
= 0 2.475 2.50 2.525 V
V
CM
Output Tempco I
OUT
= 0 ±15 ppm/°C
V
CM
Line Regulation 4.75V ≤ V
DD
≤ 5.25V 0.6 mV/V
–5.25V ≤ V
SS
≤ –4.75V 0.03 mV/V
V
CM
Output Resistance 0.1mA ≤ ⏐I
OUT
⏐ ≤ 0.1mA 8 Ω
V
REF
Output Voltage SENSE = GND, I
OUT
= 0 4.096 V
SENSE = V
REF
, I
OUT
= 0 2.048 V
SENSE = V
DD
Drive V
REF
with V
External Reference
V
REF
Output Tempco ±15 ppm/°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 1MHz Input Signal ● 68.5 71.4 dB
5MHz Input Signal
● 68 71.0 dB
THD Total Harmonic Distortion 1MHz Input Signal, First 5 Harmonics ● –84 –77 dB
5MHz Input Signal, First 5 Harmonics
● –81 –73 dB
SFDR Peak Harmonic or Spurious Noise 1MHz Input Signal ● – 85 –78.5 dB
5MHz Input Signal
● –83 –75 dB
IMD Intermodulation Distortion f
IN1
= 29.37kHz, f
IN2
= 32.446kHz – 80 dB
Full-Power Bandwidth 100 MHz
Input Referred Noise ±2.048V Input Range 0.22 LSB
RMS
±1.024V Input Range, 2x Mode (SENSE = GAIN = 0V) 0.33 LSB
RMS
Overvoltage Recovery Time 1.5x FS Input to 0 (Settling to 1LSB) 15 ns
Full-Scale Step Acquisition Time Settling to 1LSB 15 ns
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage (Clock Pin) V
DD
= 5.25V, V
SS
= 0V ● 2.4 V
V
DD
= 5.25V, V
SS
= –5V ● 3.5 V
V
IL
Low Level Input Voltage (Clock Pin) V
DD
= 4.75V, V
SS
= 0V ● 0.8 V
V
DD
= 4.75V, V
SS
= –5V ● 1V
I
IN
Digital Input Current V
IN
= 0V to V
DD
● ±10 µA
C
IN
Digital Input Capacitance 1.8 pF
V
OH
High Level Output Voltage 0V
DD
= 4.75V, I
O
= –10µA 4.74 V
0V
DD
= 4.75V, I
O
= –200µA ● 4.0 4.71 V
0V
DD
= 2.7V, I
O
= –10µA 2.6 V
0V
DD
= 2.7V, I
O
= –200µA ● 2.3 V
V
OL
Low Level Output Voltage 0V
DD
= 4.75V, I
O
= 160µA 0.05 V
0V
DD
= 4.75V, I
O
= 1.6mA ● 0.10 0.4 V
0V
DD
= 2.7V, I
O
= 160µA 0.05 V
0V
DD
= 2.7V, I
O
= 1.6mA ● 0.10 0.4 V
I
SOURCE
Output Source Current V
OUT
= 0V 50 mA
I
SINK
Output Sink Current V
OUT
= V
DD
35 mA
The ● denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. Specifications are guaranteed for both dual supply and single
supply operation. (Note 5)
T
A
= 25°C. Specifications are guaranteed for both dual supply and single supply operation. (Note 5)
The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. V
DD
= 5V, V
SS
= –5V, f
SAMPLE
= 10MHz, V
REF
= 4.096V. +A
IN
= – 0.1dBFS single ended input,
–A
IN
= 0V. (Note 6)
DY A IC ACCURACY
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INTERNAL REFERENCE CHARACTERISTICS
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DIGITAL I PUTS A D DIGITAL OUTPUTS
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