Rainbow Electronics MX7705 User Manual
Page 2
MX7705
16-Bit, Low-Power, 2-Channel,
Sigma-Delta ADC
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 3V or 5V, GND = 0, V
REF+
= 1.225V for V
DD
= 3V and V
REF+
= 2.5V for V
DD
= 5V, V
REF-
= GND, external f
CLKIN
=
2.4576MHz, CLKDIV bit = 0, C
REF+
to GND = 0.1µF, C
REF
- to GND = 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND ..............................................................-0.3V to +6V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Maximum Current Input into Any Pin ..................................50mA
Continuous Power Dissipation (T
A
= +70
°C)
PDIP (derate 10.5mW/
°C above +70°C)......................842mW
TSSOP (derate 9.4mW/
°C above +70°C) ....................755mW
Wide SO (derate 9.5mW/
°C above +70°C)..................762mW
Operating Temperature Range ..........................-40
°C to +85°C
Storage Temperature Range .............................-60
°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300
°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
Resolution (No Missing Codes)
16
Bits
Output Noise
Tables 1, 3
µV
Integral Nonlinearity
INL
Gain = 1, unbuffered
±0.003
%FSR
Unipolar Offset Error
After calibration
(Note 1)
µV
Unipolar Offset Drift
(Note 2)
0.5
µV/°C
Bipolar Zero Error
After calibration
(Note 1)
µV
Gain = 1 to 4
0.5
Bipolar Zero Drift (Note 2)
Gain = 8 to 128
0.1
µV/°C
Positive Full-Scale Error
After calibration
(Notes 1, 3)
µV
Full-Scale Drift
(Notes 2, 4)
0.5
µV/°C
Gain Error
After calibration
(Notes 1, 5)
µV
Gain Drift
(Notes 2, 6)
0.5
ppm of
FSR/°C
Bipolar Negative Full-Scale Error
After calibration
±0.003
%FSR
Gain = 1 to 4
1
Bipolar Negative Full-Scale Drift
(Note 2)
Gain = 8 to 128
0.6
µV/°C
ANALOG INPUTS (AIN1+, AIN1-, AIN2+, AIN2-)
Unipolar input range
0
V
REF
/
GAIN
AIN Differential Input Voltage
Range (Note 7)
Bipolar input range
-V
REF
/
GAIN
V
REF
/
GAIN
V
Unbuffered
GND -
30mV
V
DD
+
30mV
AIN Absolute Input Voltage
Range (Note 8)
Buffered
GND +
50mV
V
DD
-
1.5V
V
AIN DC Leakage Current
Unselected input channel
1
nA