LTC1412IG Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Lista de partido
LTC1412IG Datasheet PDF : 16 Pages
| |||
LTC1412
TYPICAL PERFOR A CE CHARACTERISTICS
Power Supply Feedthrough
vs Ripple Frequency
0
– 20
– 40
– 60
– 80
–100
VSS
VDD
DGND
–120
1k
10k
100k
1M
RIPPLE FREQUENCY (Hz)
10M
1412 G08
Input Common Mode Rejection
vs Input Frequency
80
70
60
50
40
30
20
10
0
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
1412 G09
PIN FUNCTIONS
AIN+ (Pin 1): Positive Analog Input. ±2.5V input range
when AIN– is grounded. ±2.5V differential if AIN– is
driven.
AIN– (Pin 2): Negative Analog Input. Can be grounded or
driven differentially with AIN+.
VREF (Pin 3): 2.5V Reference Output.
REFCOMP (Pin 4): 4.06V Reference Bypass Pin.
Bypass to AGND with 10µF ceramic (or 10µF tantalum in
parallel with 0.1µF ceramic).
AGND (Pin 5): Analog Ground.
D11 to D4 (Pins 6 to 13): Three-State Data Outputs.
DGND (Pin 14): Digital Ground for Internal Logic.
D3 to D0 (Pins 15 to 18): Three-State Data Outputs.
DGND (Pin 19): Digital Ground for Internal Logic.
DVDD (Pin 20): 5V Positive Supply. Tie to Pin 28. Bypass
to AGND with 0.1µF ceramic.
OVDD (Pin 21): Positive Supply for the Output Drivers. Tie
to Pin 28 when driving 5V logic. Tie to 3V when driving
3V logic.
OGND (Pin 22): Digital Ground for the Output Drivers.
CONVST (Pin 23): Conversion Start Signal. This active low
signal starts a conversion on its falling edge.
CS (Pin 24): Chip Select. This input must be low for the
ADC to recognize the CONVST inputs.
BUSY (Pin 25): The BUSY Output Shows the Converter
Status. It is low when a conversion is in progress.
VSS (Pin 26): – 5V Negative Supply. Bypass to AGND with
10µF ceramic (or 10µF tantalum in parallel with 0.1µF
ceramic).
DVDD (Pin 27): 5V Positive Supply. Tie to Pin 28.
AVDD (Pin 28): 5V Positive Supply. Bypass to AGND with
10µF ceramic (or 10µF tantalum in parallel with 0.1µF
ceramic).
6
Share Link: 