
REV. 0
–3–
AD9814
DIGITAL SPECIFICATIONS
Parameter
Symbol
Min
Typ
Max
Units
LOGIC INPUTS
High Level Input Voltage
VIH
2.6
V
Low Level Input Voltage
VIL
0.8
V
High Level Input Current
IIH
10
A
Low Level Input Current
IIL
10
A
Input Capacitance
CIN
10
pF
LOGIC OUTPUTS
High Level Output Voltage
VOH
4.5
V
Low Level Output Voltage
VOL
0.1
V
High Level Output Current
IOH
50
A
Low Level Output Current
IOL
50
A
Specifications subject to change without notice.
TIMING SPECIFICATIONS
Parameter
Symbol
Min
Typ
Max
Units
CLOCK PARAMETERS
3-Channel Pixel Rate
tPRA
300
500
ns
1-Channel Pixel Rate
tPRB
140
ns
ADCCLK Pulsewidth
tADCLK
45
ns
CDSCLK1 Pulsewidth
tC1
20
ns
CDSCLK2 Pulsewidth
tC2
40
ns
CDSCLK1 Falling to CDSCLK2 Rising
tC1C2
0ns
ADCCLK Falling to CDSCLK2 Rising
tADC2
10
ns
CDSCLK2 Rising to ADCCLK Rising
tC2ADR
10
ns
CDSCLK2 Falling to ADCCLK Falling
tC2ADF
50
ns
CDSCLK2 Falling to CDSCLK1 Rising
tC2C1
50
ns
ADCCLK Falling to CDSCLK1 Rising
tADC1
0ns
Aperture Delay for CDS Clocks
tAD
3ns
SERIAL INTERFACE
Maximum SCLK Frequency
fSCLK
10
MHz
SLOAD to SCLK Set-Up Time
tLS
10
ns
SCLK to SLOAD Hold Time
tLH
10
ns
SDATA to SCLK Rising Set-Up Time
tDS
10
ns
SCLK Rising to SDATA Hold Time
tDH
10
ns
SCLK Falling to SDATA Valid
tRDV
10
ns
DATA OUTPUT
Output Delay
tOD
6ns
3-State to Data Valid
tDV
16
ns
Output Enable High to 3-State
tHZ
5ns
Latency (Pipeline Delay)
3 (Fixed)
Cycles
Specifications subject to change without notice.
(TMIN to TMAX, AVDD = +5 V, DRVDD = +5 V, CDS Mode, fADCCLK = 6 MHz, fCDSCLK1 = fCDSCLK2 = 2 MHz,
CL = 10 pF, unless otherwise noted.)
(TMIN to TMAX, AVDD = +5 V, DRVDD = +5 V)
NOTES
1The Integral Nonlinearity in measured using the “fixed endpoint” method, NOT using a “best-fit” calculation. See Definitions of Specifications.
2The Gain Error specification is dominated by the tolerance of the internal differential voltage reference.
3Linear input signal range is from 0 V to 4 V when the CCD’s reference level is clamped to 4 V by the AD9814’s input clamp. A larger reset transient can be tolerated
by using the 3 V clamp level instead of the nominal 4 V clamp level. Linear input signal range will be from 0 V to 3 V when using the 3 V clamp level.
1V TYP
RESET TRANSIENT
4V SET BY INPUT CLAMP (3V OPTION ALSO AVAILABLE)
4V p-p MAX INPUT SIGNAL RANGE
GND
4The input limits are defined as the maximum tolerable voltage levels into the AD9814. These levels are not intended to be in the linear input range of the device.
Signals beyond the input limits will turn on the overvoltage protection diodes.
5The PGA Gain is approximately “linear in dB” and follows the equation: Gain
=
+
[
.
.[
]
58
14 8
63 –G
63
where G is the register value. See Figure 13.
Specifications subject to change without notice.