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AD9840AJSTZRL Datasheet(PDF) 3 Page - Analog Devices |
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AD9840AJSTZRL Datasheet(HTML) 3 Page - Analog Devices |
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3 / 16 page  –3– REV. 0 AD9840A Parameter Min Typ Max Unit Notes POWER CONSUMPTION 155 mW MAXIMUM CLOCK RATE 20 MHz CDS Allowable CCD Reset Transient 1 500 mV See Input Waveform in Note 1 Max CCD Black Pixel Amplitude 1 200 mV Max Input Range before Saturation 1 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 15 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 12 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 –1.0 +1.0 dB Use Equations on Page 12 to Calculate Gain Peak Nonlinearity, 500 mV Input Signal 0.4 % 12 dB Gain Applied (4 dB CDS Gain) Total Output Noise 0.25 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 8 and 9 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: 1V MAX INPUT SIGNAL RANGE 200mV MAX OPTICAL BLACK PIXEL 500mV TYP RESET TRANSIENT Specifications subject to change without notice. CCD-MODE SPECIFICATIONS (T MIN to TMAX, AVDD = DVDD = 3.0 V, fDATACLK = fSHP = fSHD = 40 MHz, unless otherwise noted.) |
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