AS1538/AS1540
Data Sheet - Electrical Characteristics
6 Electrical Characteristics
Electrical Characteristics
+VDD = +2.7 to +5.25V, VREF = +2.5V external, SCL = 3.4MHz, TAMB = -40 to +85ºC (unless otherwise specified).
Table 3. Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
Analog Input
Fullscale Input Span
Positive input, negative input
Positive input
0
VREF
V
V
+VDD
+ 0.3
-0.3
Absolute Input Range
+VDD
+ 0.3
Negative Input
-0.3
V
Track Mode
Hold Mode
15
8
Capacitance
pF
µA
ILEAK
Leakage Current
±0.1
±1
Static Performance
No Missing Codes
12
Bits
LSB
LSB
LSB
Integral Linearity Error
Differential Linearity Error
Offset Error
VREF = 2.5V, 1 LSB = 610µV
±0.75 ±1.5
±0.5
±0.5
±1
±6
Offset Error Match1
Gain Error
±0.2
±1
±1
±6
±1
LSB
LSB
LSB
mV
Gain Error Match1
±0.2
1
Power Supply Rejection
Dynamic Performance
Throughput Frequency
Conversion Time
50
kHz
µs
6.67
AC Accuracy
Total Harmonic Distortion 2
Signal-to-Noise Ratio
THD
VIN = 2.5VP-P @ 10kHz
VIN = 2.5VP-P @ 10kHz
-75
72
dB
dB
Signal-to-Noise (+ Distortion)
Ratio
VIN = 2.5VP-P @ 10kHz
VIN = 2.5VP-P @ 10kHz
69.5
75
dB
dB
Spurious-Free Dynamic Range
Voltage Reference Output
Range
2.475
2.5
30
2.525
V
ppm/ºC
Ω
Internal Reference Drift
Output Impedance
Quiescent Current
30
440
µA
Voltage Reference Input
Range
1
VDD
V
Input Resistance
1
4
GΩ
PD = 01 Internal Ref. OFF, ADC ON
@ 50kSPS
Reference Input Current
µA
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