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ADC3564 Datasheet(PDF) 39 Page - Texas Instruments

Part # ADC3564
Description  ADC3564 14-Bit, 125-MSPS, Low-Noise, Ultra-Low Power ADC
PDF  72 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADC3564 Datasheet(HTML) 39 Page - Texas Instruments

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8.4 Device Functional Modes
8.4.1 Normal operation
In normal operating mode, the entire ADC full scale range gets converted to a digital output with 14-bit
resolution. The output is available in as little as 1 clock cycle with 1-wire SLVDS interface.
8.4.2 Power Down Options
A global power down mode can be enabled via SPI as well as using the power down pin (PDN/SYNC). There is
an internal pull-down 21 kΩ resistor on the PDN/SYNC input pin and the pin is active high - so the pin needs to
be pulled high externally to enter global power down mode.
The SPI register map provides the capability to enable/disable individual blocks directly or via PDN pin mask in
order to trade off power consumption vs wake up time as shown in Table 8-9.
AIN
CLK
VREF
ADC
1.2V REF
REFBUF
N
NCO
N
Digital Downconverter
NCO
Crosspoint
Switch
Dig I/F
Figure 8-40. Power Down Configurations
Table 8-9. Overview of Power Down Options
Function/ Register
PDN
via SPI
Mask for
Global PDN
Feature -
Default
Power
Impact
Wake-up
time
Comment
ADC
Yes
-
Enabled
ADC is included in Global PDN
automatically
Reference gain amplifier
Yes
Yes
Enabled
~ 0.4 mA
~3 us
Should only be powered down in power
down state.
Internal 1.2V reference
Yes
External ref
~ 1-3.5 mA
~3 ms
Internal/external reference selection is
available through SPI and REFBUF pin.
Clock buffer
Yes
Differential
clock
~ 1 mA
n/a
Single ended clock input saves ~ 1mA
compared to differential.
Some programmability is available
through the REFBUF pin.
Output interface drivers
Yes
-
Enabled
varies
n/a
Depending on output interface mode,
unused output drivers can be powered
down for maximum power savings
Decimation filter
Yes
-
Disabled
see electrical
table
n/a
www.ti.com
ADC3564
SBAS887 – AUGUST 2022
Copyright © 2022 Texas Instruments Incorporated
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