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LM98714 -
Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output
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Features
| • | LVDS/CMOS Outputs |
| • | LVDS/CMOS Pixel Rate Input Clock or ADC Input Clock |
| • | CDS or S/H Processing for CCD or CIS sensors |
| • | Independent Gain/Offset Correction for Each Channel |
| • | Digital Black Level Correction Loop for Each Channel |
| • | Programmable Input Clamp Voltage |
| • | Flexible CCD/CIS Sensor Timing Generator |
Key Specification
Maximum Input Level |
1.2 or 2.4 Volt Modes |
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(both with + or - polarity option) |
ADC Resolution |
16-Bit |
ADC Sampling Rate |
45 MSPS |
INL |
+/- 23 LSB (typ) |
Channel Sampling Rate |
15/22.5/30 MSPS |
PGA Gain Steps |
256 Steps |
PGA Gain Range |
0.7 to 7.84x |
Analog DAC Resolution |
+/-9 Bits |
Analog DAC Range |
+/-300mV or +/-600mV |
Digital DAC Resolution |
+/-6 Bits |
Digital DAC Range |
-1024 LSB to + 1008 LSB |
SNR |
-74dB (@0dB PGA Gain) |
Power Dissipation |
505mW (LVDS) 610mW (CMOS) |
Operating Temp |
0 to 70°C |
Supply Voltage |
3.3V Nominal (3.0V to 3.6V range) |
General Description
The LM98714 is a fully integrated, high performance 16-Bit, 45 MSPS signal processing solution for digital color copiers, scanners, and other image processing applications. More...
Applications
| • | Multi-Function Peripherals |
| • | Facsimile Equipment |
| • | Flatbed or Handheld Color Scanners |
| • | High-speed Document Scanner |
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Typical Application
click for larger image
| Parameters | Values |
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| Input Channels |
3 |
| ADC Sampling Rate |
45 MSPS |
| Channel Sampling Rate (MSPS) |
15 to 30 |
| ADC Resolution |
16 bits |
| Input Signal Polarity |
Both |
| Input Sampler Type |
Both SH, CDS |
| Integrated Timing Generator |
Yes |
| Output Type |
Both LVDS, CMOS |
| Input Voltage Swing (Max) |
2.4 Volt |
| INL (+/-) |
23 LSB |
| Noise Floor |
-74 dB |
| PGA Gain Resolution |
8 bits |
| PGA Gain (Min) |
-3 dB |
| PGA Gain (Max) |
17.9 dB |
| DAC Offset Resolution (+/-) |
9 bits |
| DAC Offset Range (+/-) |
600 mV |
| Supply Voltage |
3.3 Volt |
| Power Dissipation |
0.505 Watt |
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Also Recommended
| LM98519▲ | For A 6-channel AFE, With CMOS Outputs |
| LM98620▲ | For A 6-channel AFE, With LVDS Outputs |
| LM98725▲ | For A Higher Speed, More Feature-rich Product |
Block Diagram
click for larger image
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Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM98714 Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output |
599
Kbytes |
12-Oct-06 |
Download |
Package Availability, Models, Samples & Pricing
General Description
The LM98714 is a fully integrated, high performance 16-Bit, 45 MSPS signal processing solution for digital color copiers, scanners, and other image processing applications. High-speed signal throughput is achieved with an innovative architecture utilizing Correlated Double Sampling (CDS), typically employed with CCD arrays, or Sample and Hold (S/H) inputs (for Contact Image Sensors and CMOS image sensors). The signal paths utilize 8 bit Programmable Gain Amplifiers (PGA), a +/-9-Bit offset correction DAC and independently controlled Digital Black Level correction loops for each input. The PGA and offset DAC are programmed independently allowing unique values of gain and offset for each of the three inputs. The signals are then routed to a 45MHz high performance analog-to-digital converter (ADC). The fully differential processing channel shows exceptional noise immunity, having a very low noise floor of -74dB. The 16-bit ADC has excellent dynamic performance making the LM98714 transparent in the image reproduction chain.
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1538: Application Note 1538 Interfacing National’s DS90CR218A and LM98714 |
280
Kbytes |
17-Mar-07 |
Download |
AN-1538 (Chinese): Application Note 1538 Interfacing National’s DS90CR218A and LM98714
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281 Kbytes |
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[Information as of 7-Nov-2009]
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