AS1520/AS1521
Data Sheet
- E l e c t r i c a l
Characteristics
9. Electrical characteristics are guaranteed from V
DD1(MIN)
= V
DD2(MIN)
= V
DD3(MIN)
to V
DD1(MAX)
= V
DD2(MAX)
=
V
DD3(MAX)
. For operations beyond this range, see
For guaranteed
specifications beyond the limits, contact austriamicrosystems, AG.
10. AIN = mid-scale; bit
= 1; tested with 20pF on DOUT, 20pF on SSTRB, and f
SCLK
= 6.4MHz
@ GND to V
DD2
.
11. SCLK = DIN = GND, CSN = V
DD2
.
AS1521 Electrical Characteristics
V
DD1
= V
DD2
= V
DD3
= +2.7 to +3.6V, COM = GND, f
SCLK
= 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle
(300ksps), external +2.5V at REF, REFADJ = V
DD1
, T
AMB
= T
MIN
to T
MAX
(unless otherwise specified). Typ values at
T
AMB
= +25ºC.
Table 4. AS1521 Electrical Characteristics
Symbol
DC Accuracy
INL
DNL
1
Parameter
Resolution
Relative Accuracy
Differential Nonlinearity
Offset Error
2
Conditions
Min
10
-0.5
Typ
Max
Units
Bits
+0.5
+1
+3
LSB
LSB
LSB
LSB
ppm/
°C
LSB
No missing codes over temperature
-1
-3
3
-3
+3
Gain Error
Gain-Error Temperature
±1.6
Coefficient
Channel-to-Channel Offset
±0.2
Error Matching
Dynamic Specifications:
75kHz sinewave input, 2.5Vp-p, 300ksps, 4.8MHz clock, bit
= 0,
pseudo-differential input mode
Signal-to-Noise plus
SINAD
60
Distortion Ratio
THD
Total Harmonic Distortion
Up to the 5th harmonic
70
Spurious-Free Dynamic
SFDR
70
Range
76
IMD
Intermodulation Distortion
f
IN1
= 73kHz, f
IN2
= 77kHz
Channel-to-Channel
f
IN
= 150kHz, V
IN
= 2.5Vp-p
80
4
Crosstalk
Full-Power Bandwidth
-3dB point
6
Full-Linear Bandwidth
SINAD > 68dB
350
Conversion Rate
dB
dB
dB
dB
dB
MHz
kHz
µs
Conversion Time
t
ACQ
Track/Hold Acquisition Time
t
AD
Aperture Delay
t
AJ
Aperture Jitter
Serial Clock Frequency
f
SCLK
Duty Cycle
Analog Inputs:
CH0:CH7, COM
V
CHx
- Input Voltage Range: Single-
Ended, Pseudo-Differential,
V
CHy
6
(COM)
and Differential
Multiplexer Leakage Current
Input Capacitance
Internal Reference
REF Output Voltage
V
REF
REF Short-Circuit Current
t
CONV
5
Normal operation
Normal operation
3.3
520
7
<50
Normal operation
0.5
40
4.8
60
ns
ns
ps
MHz
%
Bit
= 1
Bit
= 0
On/off leakage current, V
CHx
= 0 or A
VDD
0
V
REF
+V
REF
-V
REF
/2
/2
-1
±0.001
+1
18
2.48
2.50
30
2.52
V
µA
pF
V
mA
T
AMB
= +25°C
www.austriamicrosystems.com
Revision 1.00
7 - 29
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
