Datasheet

© 2011 Microchip Technology Inc. DS25048B-page 5
MCP3903
A028 MCLK Master Clock Frequency
Range
1 — 16.384 MHz (Note 8)
Power Specifications
P001 AV
DD
Operating Voltage, Analog 4.5 — 5.5 V
P002 DV
DD
Operating Voltage, Digital 2.7 — 3.6 V
P003 AI
DD
Operating Current, Analog
(Note 4)
7.1 9 mA BOOST bits low on all chan-
nels
12.3 16.8 mA BOOST bits high on all
channels
P004 DI
DD
Operating Current, Digital — 1.2 1.7 mA DV
DD
= 3.6V, MCLK =
4MHz
—2.4 3.4 mADV
DD
= 3.6V, MCLK =
8.192 MHz
P005 I
DDS,A
Shutdown Current, Analog — — 1 μA -40°C to 85°C, AV
DD
pin
only, (Note 5)
—— 3 μA -40°C to 125°C, AV
DD
pin
only, (Note 5)
P006 I
DDS,D
Shutdown Current, Digital — — 1 μA -40°C to 85°C, DV
DD
pin
only, (Note 5)
—— 5 μA -40°C to 125°C, DV
DD
pin
only, (Note 5)
TABLE 1-1: ANALOG SPECIFICATIONS TARGET TABLE (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at AV
DD
= 4.5 to 5.5V, DV
DD
= 2.7 to
3.6V, Internal V
REF
, MCLK = 4 MHz;PRESCALE = 1; OSR = 64; f
S
= 1 MHz; f
D
= 15.625 ksps; T
A
= -40°C to +125°C,
GAIN = 1, V
IN
= 1V
PP
= 353mV
RMS
@ 50/60 Hz.
Param.
Num.
Symbol Characteristic Min. Typ. Max. Units Test Conditions
Note 1: This specification implies that the ADC output is valid over this entire differential range, i.e. there is no distortion or
instability across this input range. Dynamic Performance is specified at -0.5 dB below the maximum signal range,
V
IN
= -0.5 dBFS @ 50/60 Hz = 333 mV
RMS
, V
REF
= 2.4V.
2: See terminology section for definition.
3: This parameter is established by characterization and not 100% tested.
4: For these operating currents, the following configuration bit settings apply: Config Register Settings:
SHUTDOWN<5:0> = 000000, RESET<5:0> = 000000; VREFEXT = 0, CLKEXT = 0.
5: For these operating currents, the following configuration bit settings apply: Config Register Settings:
SHUTDOWN<5:0> = 111111, VREFEXT = 1, CLKEXT = 1.
6: Applies to all gains. Offset error is dependant on PGA gain setting.
7: Outside of this range, ADC accuracy is not specified. An extended input range of +/- 6V can be applied continuously to
the part with no risk for damage.
8: For proper operation and to keep ADC accuracy, AMCLK should always be in the range of 1 to 5 MHz with BOOST bits
off. With BOOST bits on, AMCLK should be in the range of 1 to 8.192 MHz. AMCLK = MCLK/PRESCALE. When using a
crystal, CLKEXT bit should be equal to ‘0’.