MP8820
ELECTRICAL CHARACTERISTICS TABLE FOR DUAL SUPPLIES
Unless Otherwise Noted: V = 5 V, GND = 0 V, V
= 1.5 V, V
= 0 V, V
= 2.5 V.
DD
REF(+)
REF(–)
MID
25°C
Parameter
Symbol
Min
Typ
Max
Units
Test Conditions/Comments
DC CHARACTERISTICS
Resolution
Differential Non-Linearity
Differential Non-Linearity
Integral Non-Linearity
N
DNL
DNL
INL
8
–1
–1
–1
–1
Bits
+1/4
+1/2
+1/2
1
1
1
1
LSB
LSB
LSB
LSB
2
@ V
@ V
– V
– V
= 0.5 V
= 0.5 V
REF(+)
REF(–)
7
4, 7
Integral Non-Linearity
INL
+1/2
REF(+)
REF(–)
Monotonicity
Bipolar Zero Error
Guaranteed
10
B
ZE
–25
25
mV
Offset is measured as the bipolar
zero code transition,
01111111 to 10000000, relative to
V
MID
2, 5
Zero Scale Drift
Z
SD
50
µV/°C
Full Scale Error
%FS
This is a measure of the
internal reference
translation. Ideally
V
MID
V
MID
to V
to V
+F
–F
–5.0
–5.0
2.5
2.5
5.0
5.0
RT
RB
SE
SE
V
V
– V
= V
– V
=
RT
REF(+)
MID
– V
MID
REF(–)
RB
2, 6
1
Full Scale Drift
DC Input Range
F
0.025
%FS/°C
Vpp
SD
V
p-p
1
3
The analog input is specified as
Vpp centered around V
IN
MID
Aperture Delay
Input Capacitance
t
C
50
25
ns
pF
From rising edge of WR
AP
Measured with V – DC = 2.5 V
IN
IN
and WR = low
REFERENCE VOLTAGES
Positive Reference Input Voltage
V
REF(+)
0.5
1.5
V
Reference voltage with respect to
V
REF(–)
V
REF(+)
Input Resistance
RVR+
1
MΩ
Internal Reference Settling Time
VR
500
ns
Settling time required for ADC to
make a proper conversion after
STL
(V
REF(+)
– V ) has changed
REF(–)
Negative Reference Input Voltage
V
RVR–
0
2
V
REF(+)
–0.5
3
V
REF(–)
V
V
V
Input Resistance
Input Current
Range
1
0
2.5
KΩ
mA
V
REF(–)
I
VM
MID
MID
V
MID
V < V –0.5 –
MID DD
[V
REF(+)
– V
]
REF(–)
V
MID
< V +0.5 +
SS
[V
REF(–)
– V
]
REF(–)
POWER SUPPLIES
All GNDs are Chip Substrate
f = 1 kHz. Not tested.
Positive Supply
Negative Supply
Power Supply Rejection Ratio
Supply Current
V
GND
PSRR
4.75
0
5
0
5.25
0
–48
45
V
V
dB
mA
DD
2
I
DD
3, 4
DIGITAL CHARACTERISTICS
Digital Input High Voltage
Digital Input Low Voltage
V
V
4
V
V
IH
1
IL
Rev. 1.00
3
EXAR [ EXAR CORPORATION ]
