LTC1407CMSE Linear Technology, LTC1407CMSE Datasheet - Page 15

• Manufacturer Part Number: LTC1407CMSE
• Description: IC ADC 12BIT 3MSPS SAMPLE 10MSOP
• Manufacturer: Linear Technology

Specifications of LTC1407CMSE

• Number Of Bits: 12
• Sampling Rate (per Second): 3M
• Data Interface: Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 14mW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIONS INFORMATION
POWER-DOWN MODES
Upon power-up, the LTC1407/LTC1407A are initialized to
the active state and are ready for conversion. The Nap and
Sleep mode waveforms show the power-down modes for
the LTC1407/LTC1407A. The SCK and CONV inputs control
the power-down modes (see Timing Diagrams). Two ris-
ing edges at CONV, without any intervening rising edges
at SCK, put the LTC1407/LTC1407A in Nap mode and the
power drain drops from 14mW to 6mW. The internal refer-
ence remains powered in Nap mode. One or more rising
edges at SCK wake up the LTC1407/LTC1407A for service
very quickly and CONV can start an accurate conversion
within a clock cycle.
Figure 5. Recommended Layout
Four rising edges at CONV, without any intervening rising
edges at SCK, put the LTC1407/LTC1407A in Sleep mode
and the power drain drops from 14mW to 10μW. To bring
the part out of Sleep mode requires one or more rising SCK
edges followed by a Nap request. Then one or more rising
edges at SCK wake up the LTC1407/LTC1407A for operation.
When Nap mode is entered after Sleep mode, the reference
that was shut down in Sleep mode is reactivated.
The internal reference (V
with a 10μF load. Using Sleep mode more frequently com-
promises the settled accuracy of the internal reference.
Note that for slower conversion rates, the Nap and Sleep
modes can be used for substantial reductions in power
consumption.
LTC1407/LTC1407A
REF
) takes 2ms to slew and settle
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