ADC12D1000, ADC12D1600
SNAS480M –MAY 2010–REVISED MARCH 2013
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Table 1. Analog Front-End and Clock Balls (continued)
Ball No.
Name
Equivalent Circuit
Description
V
A
Reference Clock Input. When the AutoSync
feature is active, and the ADC12D1000/1600 is in
Slave Mode, the internal divided clocks are
synchronized with respect to this input clock. The
delay on this clock may be adjusted when
synchronizing multiple ADCs. This feature is
available in ECM via Control Register (Addr: Eh).
50k
50k
AGND
Y4/W5
RCLK+/-
100
V
BIAS
V
A
AGND
V
A
Reference Clock Output 1 and 2. These signals
provide a reference clock at a rate of CLK/4, when
enabled, independently of whether the ADC is in
Master or Slave Mode. They are used to drive the
RCLK of another ADC12D1000/1600, to enable
automatic synchronization for multiple ADCs
(AutoSync feature). The impedance of each trace
from RCOut1 and RCOut2 to the RCLK of another
ADC12D1000/1600 should be 100Ω differential.
Having two clock outputs allows the auto-
100W
100W
Y5/U6
V6/V7
RCOut1+/-
RCOut2+/-
-
+
synchronization to propagate as a binary tree. Use
the DOC Bit (Addr: Eh, Bit 1) to enable/ disable
this feature; default is disabled.
A GND
Table 2. Control and Status Balls
Ball No.
Name
Equivalent Circuit
Description
Dual Edge Sampling (DES) Mode select. In the
Non-Extended Control Mode (Non-ECM), when
this input is set to logic-high, the DES Mode of
operation is selected, meaning that the VinI input
is sampled by both channels in a time-interleaved
manner. The VinQ input is ignored. When this
input is set to logic-low, the device is in Non-DES
Mode, i.e. the I- and Q-channels operate
V
A
V5
DES
independently. In the Extended Control Mode
(ECM), this input is ignored and DES Mode
selection is controlled through the Control Register
by the DES Bit (Addr: 0h, Bit 7); default is Non-
DES Mode operation.
GND
V
A
Calibration Delay select. By setting this input logic-
high or logic-low, the user can select the device to
wait a longer or shorter amount of time,
respectively, before the automatic power-on self-
calibration is initiated. This feature is pin-controlled
only and is always active during ECM and Non-
ECM.
V4
CalDly
GND
6
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