LTC1273(Rev0) Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC1273 Datasheet PDF : 24 Pages
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LTC1273
LTC1275/LTC1276
TYPICAL PERFOR A CE CHARACTERISTICS
Intermodulation Distortion Plot
0
fSAMPLE = 300kHz
– 20
fIN1 = 29.37kHz
fIN2 = 32.446kHz
– 40
– 60
– 80
– 100
– 120
0 20 40 60 80 100 120 140 160
FREQUENCY (kHz)
LTC1273/75/76 • F05
Acquisition Time
vs Source Impedance
4500
4000
3500
3000
2500
2000
1500
1000
500
0
10
100
1k
10k
RSOURCE (Ω)
LTC1273/75/76 • TPC10
S/(N + D) vs Input Frequency and
Amplitude
80
fSAMPLE = 300kHz
70
VIN = 0dB
60
VIN = –20dB
50
40
30
20
VIN = –60dB
10
0
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1273/75/76 • TPC11
Spurious Free Dynamic Range
vs Input Frequency
0
fSAMPLE = 300kHz
– 10
– 20
– 30
– 40
– 50
– 60
– 70
– 80
– 90
– 100
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1273/75/76 • TPC12
Reference Voltage
vs Load Current
2.435
2.430
2.425
2.420
2.415
2.410
2.405
–5 –4
–3 –2 –1 0
LOAD CURRENT (mA)
12
LTC1273/75/76 • TPC13
UU U
PI FU CTIO S
AIN (Pin 1): Analog Input. 0V to 5V (LTC1273), ±2.5V
(LTC1275) or ±5V (LTC1276).
VREF (Pin 2): +2.42V Reference Output. Bypass to AGND
(10µF tantalum in parallel with 0.1µF ceramic).
AGND (Pin 3): Analog Ground.
D11-D4 (Pins 4 to 11): Three-State Data Outputs.
DGND (Pin 12): Digital Ground.
D3/11-D0/8 (Pins 13 to 16): Three-State Data Outputs.
NC (Pins 17 and 18): No Connection.
HBEN (Pin 19): High Byte Enable Input. This pin is used to
multiplex the internal 12-bit conversion result into the
lower bit outputs (D7-D0/8). See Table 1. HBEN also
disables conversion start when HIGH.
RD (Pin 20): READ Input. This active low signal starts a
conversion when CS and HBEN are low. RD also enables
the output drivers when CS is low.
CS (Pin 21): The CHIP SELECT Input must be low for the
ADC to recognize RD and HBEN inputs.
BUSY (Pin 22): The BUSY Output shows the converter
status. It is low when a conversion is in progress.
8
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