DA6501.001
27 October 2008
MAS6501
This is preliminary information on a new
product under development. Micro Analog
Systems Oy reserves the right to make any
changes without notice.
16-Bit Analog-to-Digital Converter
•
Standby Current Consumption
0.1 µA
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Low Supply Current
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Low Power Consumption
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Resolution 16 Bits
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Ratiometric
∆Σ
ADC
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ENOB 14 Bits
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Serial Data Output (I
2
C bus)
DESCRIPTION
The MAS6501 is a 16 bit Analog-to-Digital
Converter (ADC), which employs a delta-sigma (∆Σ)
conversion technique. With the linear input signal
range of 282 mV
PP
its resolution is 14 bits.
The MAS6501 is designed especially to
meet the requirement for low power consumption,
thus making it an ideal choice for battery powered
systems. The MAS6501 is equipped with a standby
function, i.e. the ADC is in power down between
each conversion. By utilizing this and overall low
power consumption, current consumption values of
1.6 µA (one pressure conversion in a second with
full 14-bit accuracy) or less can be achieved.
The MAS6501 has an on-chip second order
decimator filter to process the output of the second
order
∆Σ
-modulator. The ADC also has two
selectable conversion ranges with two optional
offset levels.
2
A bi-directional 2-wire I C bus is used for
configuring
conversion
parameters,
starting
conversion and reading out the A/D conversion
result.
MAS6501 has one input channel suitable for
piezo resistive pressure sensor. In addition to
pressure measurement configuration the device can
be configured to temperature measurement.
FEATURES
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Low Standby Current Consumption 0.1 µA Typ
Low Supply Current: 0.2 µA..1.6 µA
Supply Voltage: 2.0 V…3.6 V
Ratiometric
∆Σ
Conversion
Two Input Signal Ranges (VDD=2.35V):
325 mV
PP
, 98 mV
PP
Two Optional Offsets (VDD=2.35V):
123 mV, 33 mV
Over Sampling Ratio: 512, 256, 128, 64
Conversion Times 32.2 ms…2.5 ms
In Fast Mode: Over Sampling Ratio 64,
Conversion Time 2.5 ms, Resolution 10 Bits
Good Noise Performance due to
∆Σ
Architecture
2
2-Wire I C Interface
APPLICATIONS
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Battery Powered Systems
Low Frequency Measurement Applications
Pressure and Temperature Measurement
Current/Power Consumption Critical Systems
Industrial and Process Control Applications in
Noisy Environments
I
2
C is a registered trademark of Philips Inc.
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