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AD9842AJST Datasheet(PDF) 3 Page - Analog Devices |
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AD9842AJST Datasheet(HTML) 3 Page - Analog Devices |
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3 / 23 page  REV. 0 –3– AD9841A/AD9842A Parameter Min Typ Max Unit Notes POWER CONSUMPTION 78 mW See TPC 1 for Power Curves MAXIMUM CLOCK RATE 20 MHz CDS Gain 0 dB Allowable CCD Reset Transient 1 500 mV See Input Waveform in Footnote 1 Max Input Range Before Saturation 1 1.0 V p-p PxGA Gain at 4 dB Max CCD Black Pixel Amplitude 1 200 mV PIXEL GAIN AMPLIFIER (PxGA) Max Input Range 1.0 V p-p PxGA Gain at 4 dB Max Output Range 1.6 V p-p At Any PxGA Gain Gain Control Resolution 64 Steps Gain Monotonicity Guaranteed Gain Range (Two’s Complement Coding) See Figure 28 for PxGA Gain Curve Min Gain (PxGA Gain Code 32) –2 dB Max Gain (PxGA 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 29 for VGA Gain Curve Low Gain (VGA Gain Code 91) 2 dB Max Gain (VGA Gain 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 2 –0.5 +0.5 Use Equations on Page 19 to Calculate Gain PxGA Gain Accuracy Min Gain (PxGA Register Code 32) –1 0 +1 dB VGA Gain Fixed at 2 dB (Code 91) Max Gain (PxGA Code 31) 11 12 13 dB VGA Gain Fixed at 2 dB (Code 91) Peak Nonlinearity, 500 mV Input Signal 0.1 % 12 dB Gain Applied Peak Nonlinearity, 800 mV Input Signal 0.4 % 8 dB Gain Applied 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 Normal Clock Signals Applied Fast Recovery Mode 0.1 ms Reference Standby Mode 1 ms Total Shutdown Mode 3 ms Power-Off Condition 15 ms NOTES 1Input Signal Characteristics defined as follows: 200mV MAX OPTICAL BLACK PIXEL 500mV TYP RESET TRANSIENT 1V MAX INPUT SIGNAL RANGE 2PxGA gain fixed at 4 dB. Specifications subject to change without notice. AD9841A CCD-MODE SPECIFICATIONS (TMIN to TMAX, AVDD = DVDD = 3.0 V, fDATACLK = fSHP = fSHD = 20 MHz, unless other- wise noted.) |
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