Analog Devices AD9843A manual

AD9843A

CCD-MODE SPECIFICATIONS (TMIN to TMAX, AVDD = DVDD = 3.0 V, fDATACLK = fSHP = fSHD = 20 MHz, unless otherwise noted.)

Parameter	Min	Typ	Max	Unit	Notes
POWER CONSUMPTION		78		mW	See TPC 1 for Power Curves
MAXIMUM CLOCK RATE	20			MHz
CDS
Allowable CCD Reset Transient1		500		mV	See Input Waveform in Note 1
Max CCD Black Pixel Amplitude1		200		mV
Max Input Range Before Saturation1	1.0			V p-p	With 4 dB CDS Gain
Max Input Range Before Saturation		1.5		V p-p	With –2 dB CDS Gain
Max Input Range Before Saturation		0.5		V p-p	With 10 dB CDS Gain
Max Output Range	1.6			V p-p	At Any CDS Gain Setting
Gain Resolution		64		Steps
Gain Range (Two’s Complement Coding)					See Figure 12 for CDS Gain Curve
Min Gain (CDS Gain Register Code 32)		–2		dB
Medium Gain (CDS Gain Code 63)		4		dB	4 dB Is Default with CDS Gain Disabled
Max Gain (CDS Gain Code 31)		10		dB
VARIABLE GAIN AMPLIFIER (VGA)
Max Input Range	1.6			V p-p
Max Output Range	2.0			V p-p
Gain Control Resolution		1024		Steps
Gain Monotonicity		Guaranteed
Gain Range					See Figure 13 for VGA Gain Curve
Low Gain (VGA Register Code 91)		2		dB	See Page 13 for Gain Equations
Max Gain (VGA Code 1023)		36		dB
BLACK LEVEL CLAMP
Clamp Level Resolution		256		Steps
Clamp Level					Measured at ADC Output
Min Clamp Level		0		LSB
Max Clamp Level		63.75		LSB
SYSTEM PERFORMANCE					Specifications Include Entire Signal Chain
Gain Accuracy, VGA Code 91 to 1023	–0.5		+0.5	dB	Use Equations on Page 13 to Calculate Gain
Peak Nonlinearity, 500 mV Input Signal		0.1		%	12 dB Gain Applied (4 dB CDS Gain)
Peak Nonlinearity, 800 mV Input Signal		0.4		%	8 dB Gain Applied (4 dB CDS Gain)
Total Output Noise		0.2		LSB rms	AC Grounded Input, 6 dB Gain Applied
Power Supply Rejection (PSR)		40		dB	Measured with Step Change on Supply
POWER-UP RECOVERY TIME					Clocks Must Be Applied, as in Figures 5 and 6
From Fast Recovery Mode		0.1		ms
From Reference Standby Mode		1		ms
From Total Shutdown Mode		3		ms
From Power-Off Condition		15		ms

NOTES

1Input Signal Characteristics defined as follows, with 4 dB CDS gain:

500mV TYP
RESET
TRANSIENT	1V MAX
200mV MAX
	INPUT
OPTICAL	SIGNAL RANGE
BLACK PIXEL

Specifications subject to change without notice.

REV. 0 –3–