ADS58C28_16 Datasheet, PDF (20/68 Pages) Texas Instruments – Dual Channel IF Receiver with SNRBoost 3G

ADS58C28
SBAS509B – JUNE 2010 – REVISED OCTOBER 2010
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When READOUT is disabled, the SDOUT pin is in a high-impedance mode. If serial readout is not used, the
SDOUT pin must float.
SDATA
Register Address A[7:0] = 00h
Register Data D[7:0] = 01h
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
SCLK
SEN
SDOUT
The SDOUT pin is in a high-impedance state.
a) Enable serial readout (READOUT = 1)
SDATA
SCLK
Register Address A[7:0] = 45h
Register Data D[7:0] = XX (don’t care)
A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
SEN
SDOUT
0
0
0
0
0
1
0
0
The SDOUT pin functions as serial readout (READOUT = 1).
b) Read contents of Register 45h. This register has been initialized with 04h (device is put into global power-down mode.)
(1) The SDOUT pin functions as a serial readout (READOUT = 1).
Figure 10. Serial Readout Timing Diagram
Table 10. Reset Timing (Only when Serial Interface is Used)⁽¹⁾
PARAMETER
t₁
Power-on delay
t₂
Reset pulse width
t₃
Register write delay
CONDITIONS
Delay from AVDD and DRVDD power-up to active RESET
pulse
Active RESET signal pulse width
Delay from RESET disable to SEN active
MIN TYP MAX UNIT
1
ms
10
ns
1 µs
100
ns
(1) Typical values at +25°C; minimum and maximum values across the full temperature range: T_MIN = –40°C to T_MAX = +85°C, unless
otherwise noted.
20
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