adc1020 austriamicrosystems, adc1020 Datasheet - Page 2

• Manufacturer Part Number: adc1020
• Description: Cmos 10-bit Pipelined A/d Converter
• Manufacturer: austriamicrosystems

Datasheet : ADC1020 – C35
TECHNICAL DATA
(Tjunction=-40 to 85°C, VDDA=VDD=+2.7V to +3.6V, fclk=20MHz, VREFP and VREFN as specified, unless otherwise specified)
DC ACCURACY
Symbol
DNL
INL
OFF
GAINERR
GAINERR
REFERENCE CHARACTERISTICS
Symbol
VBG
VCMU
VCM
VREFP
VREFN
VREF
R
I
C
C
R
C
R
C
ANALOG INPUT
Symbol
Vind
R
C
F
1)
2)
3)
4)
5)
Revision C, 07.09.02
bg
inmax
bg
cmu
cm
refp
refp
refn
refn
in
in
Offset and Gain Error correspond to measured reference voltages. This measured reference voltage VREF has a
value of 960mV instead of 1000mV and 1950mV instead of 2000mV for VREF=1V and VREF=2V, respectively.
This is because of an additional trop of the bandgap voltage caused by it’s pad-resistor.
Offset and Gain Error correspond to measured reference voltages outside the chip. The real voltage reference
VREF at the macro cell has the value 972mV instead of 1000mV and 1945mV instead of 2000mV for VREF=1V
and VREF=2V, respectively. This is because of the voltage trop caused by the pad-resistors.
Only for fully differential mode.
For VBG=1.25V and VDDA=3.3V
For VBG=2.5V and VDDA=3.3V
Parameter
Resolution (No missing Code)
Differential Linearity Error
Integral Linearity Error
Offset Error
Gain Error for Internal Ref.
Gain Error for External Ref.
Parameter
ext. Bandgap Reference Voltage
Unbuffered C. Mode Voltage
Buffered C. Mode Voltage
Pos. Reference Voltage
Neg. Reference Voltage
Difference between VREFP and VREFN
ext. Bandgap Ref. Impedance
ext. Bandgap Ref. Input Current
Unbuff. Comm. Mode Imped.
Comm. Mode Impedance
(Op. Modes 2, 3, 5 and 6)
Pos. Reference Impedance
(Op. Modes 3 and 6)
Neg. Reference Impedance
(Op. Modes 3 and 6)
Parameter
Diff. Input Voltage Range, related to
VCMU
Input Impedance
Max. Input Signal Frequency
1)
2)
Conditions
Op. Mode 1
Op. Mode 3,6
Conditions
Conditions
Min
10
-0.9
-1
-10
-5
+23
Min
-VREF
100
Min
1.35
1
Typ
1.25
VDDA/2
VCMU
VCM+0.4VBG
VCM-0.4VBG
1
10
5.6
2.2
22.5
18
7.1
18
7.1
Typ
10
±0.4
±0.6
0
0
+28
Typ
1
4)
103
5)
Max
10
+1
+1
10
+5
+33
Max
VREF
10
Max
2.5
1.8
2
Page 2 of 11
3)
3)
LSB
LSB
V
pF
pF
MHz
Units
Bit
LSB
LSB
LSB
Units
V
V
V
V
V
kΩ
µA
pF
pF
kΩ
kΩ
Units
V
MΩ
pF