AS1536/AS1537
Datasheet - Electrical Characteristics
6 Electrical Characteristics
VDD = +2.7V to +5.25V, 73ksps, fSCLK = 2.1MHz (50% duty cycle); AS1536:4.7µF capacitor at REF, AS1537: external
reference; VREF = 2.5V applied to REF; TAMB = TMIN to TMAX (unless otherwise specified).
Table 3. Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DC Accuracy 1
Resolution
12
Bits
Relative Accuracy 2
±1
LSB
DNL
Differential Non-Linearity
Offset Error
No missing codes over temperature
±1
±6
LSB
LSB
Gain Error 3
±6
LSB
Gain Temperature Coefficient
±1
ppm/°C
Dynamic Specifications (10kHz sine-wave input, 0V to 2.5Vp-p, 73ksps, fSCLK =2.1MHz)
Signal-to-Noise + Distortion
SINAD
THD
67
70.5
dB
Ratio
Total Harmonic Distortion
Up to the 5th harmonic
-3dB rolloff
-83
88
-80
dB
dB
SFDR Spurious-Free Dynamic Range
Small-Signal Bandwidth
80
2.5
2.5
MHz
MHz
Full-Power Bandwidth
Conversion Rate
tCONV
tACQ
Conversion Time
5.5
7.5
1.5
µs
µs
Track/Hold Acquisition Time
Throughput Rate 4
Aperture Delay
Aperture Jitter
fSCLK = 2.1MHz
73
ksps
tAP
Figure 27 on page 14
7
ns
ps
<50
Analog Input
Input Voltage Range
Input Capacitance
0
VREF
V
21
pF
Internal Reference (AS1536 only)
REF Output Voltage
TAMB = +25ºC 5
2.47
2.50
2.53
45
V
REF Short-Circuit Current
mA
REF Temperature Coefficient
AS1536
±30
ppm/°C
Load Regulation 6
0 to 0.2mA output load
0.35
mV
µF
CREFBYP
Capacitive Bypass at REF
4.7
External Reference (VREF = 2.5V)
VDD +
50mV
Input Voltage Range
1.00
V
Input Current
Input Resistance
100
25
150
µA
kΩ
µA
µF
18
REF Input Current in Shutdown
SHDNN = 0V
Revision 1.01
±0.01
10
CREFBYP
Capacitive Bypass at REF
0.1
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