LTC1860LCS8 Ver la hoja de datos (PDF) - Linear Technology
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LTC1860LCS8 Datasheet PDF : 12 Pages
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LTC1860L/LTC1861L
TYPICAL PERFOR A CE CHARACTERISTICS
Change in Gain Error vs
Temperature
1.0
0.8
fS = 150kHz
VCC = 2.7V
0.6 VREF = 2.5V
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1860L/61L G13
Signal-to-(Noise + Distortion)
vs fIN
80
70
60
50
40
30
20
10
0
1
10
fIN (kHz)
fS = 150kHz
TA = 25°C
VCC = 3V
VIN = 0dB
VREF = 3V
100
1860L/61L G16
4096 Point FFT Non Averaged
0
–10
fIN = 1kHz
fS = 150kHz
–20
TA = 25°C
–30
VCC = 3V
–40
VREF = 3V
–50
–60
–70
–80
–90
–100
–110
–120
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
fIN (kHz)
1860L/61L G14
Total Harmonic Distortion
vs fIN
0
fS = 150kHz
–10 TA = 25°C
–20
VCC = 3V
VIN = 0dB
–30 VREF = 3V
–40
–50
–60
–70
–80
–90
–100
1
10
fIN (kHz)
100
1860L/61L G17
SNR vs fIN
80
70
60
50
40
30
20
10
0
1
10
fIN (kHz)
fS = 150kHz
TA = 25°C
VCC = 3V
VIN = 0dB
VREF = 3V
100
1860L/61L G15
Spurious Free Dynamic Range
vs fIN
100
90
80
70
60
50
40
30
20
10
0
1
10
fIN (kHz)
fS = 150kHz
TA = 25°C
VCC = 3V
VIN = 0dB
VREF = 3V
100
1860L/61L G18
PI FU CTIO S LTC1860L
VREF (Pin 1): Reference Input. The reference input defines
the span of the A/D converter and must be kept free of
noise with respect to GND.
IN+, IN– (Pins 2, 3): Analog Inputs. These inputs must be
free of noise with respect to GND.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
CONV (Pin 5): Convert Input. A logic high on this input
starts the A/D conversion process. If the CONV input is left
high after the A/D conversion is finished, the part powers
down. A logic low on this input enables the SDO pin,
allowing the data to be shifted out.
SDO (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this pin.
SCK (Pin 7): Shift Clock Input. This clock synchronizes the
serial data transfer.
VCC (Pin 8): Positive Supply. This supply must be kept
free of noise and ripple by bypassing directly to the
analog ground plane.
18601Lf
6
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