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AD9979
Rev. C | Page 4 of 56
TIMING SPECIFICATIONS
CL = 20 pF, AVDD = DVDD = 1.8 V, fCLI = 65 MHz, unless otherwise noted.
Table 2.
Parameter
Symbol
Min
Typ
Max
Unit
Comments
MASTER CLOCK (CLI)
CLI Clock Period
tCONV
15.38
ns
CLI High/Low Pulse Width
tADC
6.9
7.7
8.9
ns
Delay from CLI Rising Edge to Internal
Pixel Position 0
tCLIDLY
5
ns
AFE
SHP Rising Edge to SHD Rising Edge
tS1
6.9
7.7
8.5
ns
AFE Pipeline Delay
16
Cycles
CLPOB Pulse Width (Programm
able)1tCOB
2
20
Pixels
HD Pulse Width
tCONV
ns
VD Pulse Width
1 HD period
ns
SERIAL INTERFACE
Maximum SCK Frequency
fSCLK
40
MHz
SL to SCK Setup Time
tLS
10
ns
SCK to SL Hold Time
tLH
10
ns
SDATA Valid to SCK Rising Edge Setup
tDS
10
ns
SCK Rising Edge to SDATA Hold
tDH
10
ns
H-COUNTER RESET SPECIFICATIONS
HD Pulse Width
tCONV
ns
VD Pulse Width
1 HD period
ns
VD Falling Edge to HD Falling Edge
tVDHD
0
VD period tCONV
ns
HD Falling Edge to CLI Rising Edge
tHDCLI
3
tCONV 2
ns
CLI Rising Edge to SHPLOC (Internal
Sample Edge)
tCLISHP
3
tCONV 2
ns
TIMING CORE SETTING RESTRICTIONS
Inhibited Region for SHP Edge Loca
tion2tSHPINH
50
64/0
Edge location
Inhibited Region for SHP or SHD with
RETIME = 0, MASK = 0
tSHDINH
H × NEGLOC 15
H × NEGLOC 0
Edge location
RETIME = 0, MASK = 1
tSHDINH
H × POSLOC 15
H × POSLOC 0
Edge location
RETIME = 1, MASK = 0
tSHPINH
H × NEGLOC 15
H × NEGLOC 0
Edge location
RETIME = 1, MASK = 1
tSHPINH
H × POSLOC 15
H × POSLOC 0
Edge location
Inhibited Region for DOUTPHASE Edge
tDOUTINH
SHDLOC + 0
SHDLOC + 15
Edge location
1 Minimum CLPOB pulse width is for functional operation only. Wider typical pulses are recommended to achieve good clamp performance.
2 Only applies to slave mode operation. The inhibited area for SHP is needed to meet the timing requirements for tCLISHP for proper H-counter reset operation.
3 When 0x34[2:0] HxBLKRETIME bits are enabled, the inhibit region for SHD location changes to inhibit region for SHP location.
4 When sequence register 0x09[23:21] HBLK masking registers are set to 0, the H-edge reference becomes H × NEGLOC.
5 The H-clock signals that have SHP/SHD inhibit regions depends on the HCLK mode: Mode 1 = H1, Mode 2 = H1, H2, and Mode 3 = H1, H3.
6 These specifications apply when H1POL, H2POL, RGPOL, and HLPOL are all set to 1 (default setting).