LTC1860 Linear Technology, LTC1860 Datasheet - Page 6

• Manufacturer Part Number: LTC1860
• Description: (LTC1860 / LTC1861) 12-/16-Bit 8-Channel 200ksps ADCs
• Manufacturer: Linear Technology

LTC1860/LTC1861
TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
V
the span of the A/D converter and must be kept free of
noise with respect to GND.
IN
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
6
REF
–0.2
–0.4
–0.6
–0.8
+
–1.0
100
1.0
0.8
0.6
0.4
0.2
U
, IN
90
80
70
60
50
40
30
20
10
0
0
–50
(Pin 1): Reference Input. The reference input defines
1
Change in Gain Error vs
Temperature
Signal-to-(Noise + Distortion)
vs f
V
V
T
V
V
–
A
CC
REF
CC
IN
= 25 C
–25
(Pins 2, 3): Analog Inputs. These inputs must be
= 0dB
IN
= 5V
= 5V
= 5V
U
10
0
TEMPERATURE ( C)
25
f
IN
100
U
(kHz)
50
75
1000
LTC1860
W
100
SNR
SINAD
1860/61 G13
1860/61 G16
U
10000
125
–100
–20
–30
–40
–50
–60
–70
–80
–90
–10
80
70
60
50
40
30
20
10
0
0
–40
1
Total Harmonic Distortion
vs f
Signal-to-(Noise + Distortion)
vs Input Level
f
T
V
T
V
V
IN
A
CC
A
CC
IN
–35
= 25 C
= 25 C
= 10kHz
IN
= 0dB
= 5V
= 5V
–30
INPUT LEVEL (dB)
10
–25
f
IN
–20
(kHz)
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.
V
free of noise and ripple by bypassing directly to the
analog ground plane.
CC
–15
100
(Pin 8): Positive Supply. This supply must be kept
–10
1860/61 G17
–5
1195 G20
1000
0
–100
–120
–20
–40
–60
–80
100
90
80
70
60
50
40
30
20
10
0
0
0
1
4096 Point FFT
Spurious Free Dynamic Range
vs f
f
f
T
V
S
IN
A
CC
10 20 30
= 204.1kHz
= 99.5kHz
= 25 C
IN
= 5V
10
40
f
IN
f (kHz)
50
(kHz)
60 70
100
80
T
V
V
A
CC
IN
1860/61 G18
= 25 C
1860/61 G15
= 0dB
90
= 5V
18601f
100
1000