AS1524/AS1525
Datasheet - Electrical Characteristics
6 Electrical Characteristics
VDD = +2.7 to +5.25V, VREF = +2.5V, 4.7µF Capacitor at REF; fSCLK = 8MHz (50% Duty Cycle); AIN- = GND (AS1524)
TAMB = TMIN to TMAX (unless otherwise specified). Typical Values at TAMB = +25ºC. Unipolar Mode (AS1524).
Table 4. Electrical Characteristics
Symbol
Parameter
Condition
Min
12
Typ
Max
Unit
DC Accuracy
Resolution
Relative Accuracy
Differential Non-Lineraity
Offset Error
Bits
LSB
LSB
LSB
INL
±1.0
+1.0
±4
DNL
No Missing Codes Over Temperature
-0.99
±1
±1
Gain Error 1
±4
LSB
Gain Temp Coefficient
Offset Temp Coefficient
±0.3
±0.3
ppm/ºC
ppm/ºC
Channel-to-Channel Offset
Match
±0.1
±0.1
LSB
LSB
Channel-to-Channel Gain
Match
Dynamic Specifications – (fIN (sinewave) = 10kHz, VIN = 2.5VP-P, 150ksps, fSCLK = 8MHz (50% duty cycle), AIN- =
GND (AS1524)
SINAD
Signal-to-Noise Plus Distortion
72.5
dB
dB
Total Harmonic Distortion (to
the 5th Harmonic)
THD
-79.5
SFDR
Spurious-Free Dynamic Range
Full Power Bandwidth
84
20
dB
-3dB Point
MHz
kHz
Full Linear Bandwidth
-0.1dB Point
400
Conversion Rate
tCONV
tACQ
Conversion Time
Track/Hold Acquisition Time
Aperture Delay
Exclusive of tACQ
3.3
30
3.7
1.4
µs
µs
ns
fSCLK
Max Serial Clock Frequency
Serial Clock Duty Cycle
8
MHz
%
30
70
Analog Input
Unipolar
Bipolar
0
VREF
VIN Range 2
V
-VREF/2
VREF/2
No Channel Selected or Conversion
Halted
Input Leakage Current
±0.01
±1
µA
Track Mode
Hold Mode
20
5
pF
pF
Input Capacitance
External Reference Input
VDD +
50mV
VREF
VIN Range
1.0
0
V
VREF = +2.5V @ 150ksps
VREF = +4.096V @ 150ksps
Acquisition Between Conversions
11
19
+2
25
IREF
Input Current
µA
+5
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