VSP2560_14 Datasheet, PDF (1/7 Pages) Texas Instruments – CCD ANALOG FRONT-END FOR DIGITAL CAMERAS

Not Recommended for New Designs
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VSP2560
VSP2562
VSP2566
SBES008A - AUGUST 2008 - RSBEEVSI0S0E8 –DAAUGPURSITL22000814
CCD ANALOG FRONT-END FOR DIGITAL CAMERAS
Check for Samples: VSP2560, VSP2562, VSP2566
FEATURES
1
•2 CCD Signal Processing:
– 36-MHz Correlated Double Sampling (CDS)
• Output Resolution:
– VSP2560 (10-Bit)
– VSP2562 (12-Bit)
– VSP2566 (16-Bit)
• 16-Bit Analog-to-Digital Conversion:
– 36-MHz Conversion Rate
– No Missing Codes Ensured
• 80-dB Input-Referred SNR (at Gain = 12 dB)
• Programmable Black Level Clamping
• Programmable Gain Amp (PGA):
– –9 dB to +44 dB
– –3 dB to +18 dB (Analog Front Gain)
– –6 dB to +26 dB (Digital Gain)
• Portable Operation:
– Low Voltage: 2.7 V to 3.6 V
– Low Power: 86 mW at 3.0 V, 36 MHz
– Low Power: 6 mW (Standby Mode)
• Two-Channel, General-Purpose, 8-Bit DAC
• QFP-48 Package
DESCRIPTION
The VSP2560/62/66 are a family of complete mixed-
signal processing ICs for digital cameras that provide
correlated double sampling (CDS) and analog-to-
digital conversion for the output of CCD arrays. The
CDS extracts the pixel video information from the
CCD signal, and the analog-to-digital converter (ADC)
converts the digital signal. For varying illumination
conditions, a very stable gain control of –9 dB to 44
dB is provided. The gain control is linear in dB. Input
signal clamping and offset correction of the input
CDS are also provided.
Offset correction is performed by the optical black
(OB) level calibration loop, and is held in calibrated
black level clamping for an accurate black level
reference. Additionally, the black level is quickly
recovered after gain changes. The VSP2560/62/66
are available in LQFP-48 packages and operate from
single +3 V supplies.
DEVICE
VSP2560
VSP2562
VSP2566
RESOLUTION
(Bits)
10
12
16
Table 1. FEATURE COMPARISON BY DEVICE
TRANSFER CHARACTERISTICS
(LSB)
DNL
INL
±0.5
±1
±0.5
±2
±2
±32
OB CLAMP LOOP (LSB)
PROGRAMMABLE
RANGE
OBCLP
LEVEL
16 to 78
32
64 to 312
128
1024 to 4992
2048
OB LEVEL
2
8
128
1
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