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Details, datasheet, quote on part number:XWM8170CFT/V
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Datasheet text preview:
WM8170 3.3V Integrated Signal Processor for Area Array CCDs
Product Preview Rev 1.0 March 2000
DESCRIPTION
The WM8170 is a 10-bit analogue front end/digitiser IC, which processes and digitises the analogue output signals from area array CCD sensors at pixel sample rates of up to 21MSPS. The device contains input blanking, correlated double sampling (CDS), programmable gain amplifier, black level clamp, on-board voltage reference and a 10-bit, 21MSPS ADC. Two auxiliary 8 bit DACs are provided which may be used for bias voltage control or camera functions such as auto-focus. Fine black level adjustment is performed digitally after the ADC. This digital adjustment will follow DC shifts in the video input without introducing digital correction noise into the image. The WM8170 is designed to interface to a wide range of area array CCDs and can operate at lower power for slower sample rates by setting the reference bias current via an external resistor connected to the ISET pin. All signal timing within the device is derived from the CCD clock signals. The WM8170 is controlled via a configurable serial interface, which is compatible with all of Wolfson' s imaging devices. The user is able to control the device functions and monitor on-chip register settings via the easy-to-use digital management interface.
FEATURES
· · · · · · · · · · · · · · · 10-bit, 21MSPS ADC No missing codes guaranteed Correlated double sampling Programmable gain amplifier Black level clamp Input blanking Two auxiliary 8-bit DACs Power save mode Serial or parallel control bus Adjustable sample rate User selectable sampling on rising or falling edge of clocks Single 3.3V power supply (3V minimum) 48-pin TQFP package Standby mode ICC<10µA Power consumption typically 190mW at 12MHz, 270mW at 21MHz
APPLICATIONS
· · · · · Digital still cameras Digital camcorders PC cameras Progressive scan CCDs NTSC, PAL interline CCDs
BLOCK DIAGRAM
VRB VMID V R T (15) (16) (14) BLCENB (27) SHP SHD (22) (21) CVDD (42) AVDD[1-3] DVDD[1-4] DCLK (10,11,20) (3,23,33,39) (38)
VCLP (12)
REFERENCE
CLPENB (24) CLPSWB (25) PIN (19) DIN (18) PBLK/HD (26)
Dual Mode Pin
CLAMP
ANALOGUE BLACK LEVEL CLAMP
TIMING GENERATOR DIGITAL COMPARATOR DIGITAL BLACK LEVEL CLAMP AND FILTER (8) PTDO (31) OEB HI-Z DATA I/O (1,4-7,44-48)
CDS S/H
PGA
10-BIT ADC
VOUT1 (40)
8-BIT ADC 8-BIT ADC
WM8170
CONFIGURABLE SERIAL/PARALLEL INTERFACE (29) PNS (36) SEN/STB (37) SCK/RNW (35) SDI/DNA (32) NRESET (34) SDO (30) PDB/VD
Dual Mode Pin
VOUT2 (41)
BIAS CIRCUIT
(43) CGND
(9,17) AGND[1-2]
(13) ISET
(2,28) DGND[1-2]
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: sales@wolfson.co.uk http://www.wolfson.co.uk
WOLFSON MICROELECTRONICS LTD.
Product Preview data sheets contain specifications for products in the formative phase of development. These products may be changed or discontinued without notice.
© 2000 Wolfson Microelectronics Ltd.
WM8170 PIN CONFIGURATION
SCL/RNW DVDD1 DCLK VOUT2 VOUT1
Product Preview Rev 1.0
ORDERING INFORMATION
DEVICE TEMP. RANGE 0 to 70 C
o
PACKAGE 48-pin TQFP
CGND
D5 DGND2 DVDD4 D6 D7 D8 D9 PTDO AGND1 AVDD1 AVDD3 VCLP
1 2 3 4 5 6 7 8 9
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
CVDD
XWM8170CFT/V
D4
D3 D2 D1
D0
SEN/STB SDI/DNA SDO DVDD3 NRESET OEB PDB/HD PNS DGND1 BLCENB PBLK/HD CLPSWB
WM8170
10 11
12 25 13 14 15 16 17 18 19 20 21 22 23 24
VRB VMID
PIN AVDD2
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. As per JEDEC specifications A112-A and A113-A this product requires specific storage conditions prior to surface mount assembly and as such will be supplied in vacuum sealed moisture barrier bags.
CONDITION Analogue supply voltages (AVDD1 to AVDD3) Digital supply voltages (DVDD1 to DVDD4) Clock supply voltage, CVDD Digital inputs BLCENB, CLPENB, CLPSWB, PBLK, SHD, SHP pins Digital inputs PDB, NRESET, SCK/RNW, SEN/STB, PNS, SDI/DNA, OEB, DCLK, SDO pins Digital outputs, D0 to D9, PTDO Analogue inputs and analogue outputs Maximum difference between AGND, DGND and CGND Maximum difference between DVDD1, AVDD and CVDD Operating temperature range, TA Storage temperature Lead temperature (soldering, 10 seconds) Note 1:
CLPENB
AGND2 DIN
SHP DVDD2
ISET VRT
SHD
MIN AGND -0.3V DGND -0.3V CGND -0.3V DGND -0.3V DGND -0.3V DGND -0.3V AGND -0.3V - 0.1V - 0.1V 0C -65 C
o o
MAX AGND +7V DGND +7V CGND +7V DVDD2 +0.3V DVDD3 +0.3V DVDD4 +0.3V AVDD +0.3V +0.1V +0.1V +70 C +150 C +260 C
o o o
Note 2:
AGND denotes the voltage on any analogue ground pin. DGND denotes the voltage on any digital ground pin. CGND denotes the voltage on the clock ground pin. For this device all GND pins should be star connected as close as possible to the device. AVDD denotes the voltage on any AVDD pin. For this device all AVDD supplies should be connected together.
PP Rev 1.0 March 2000
WOLFSON MICROELECTRONICS LTD
2
WM8170
Product Preview Rev 1.0
RECOMMENDED OPERATING CONDITIONS
SHD/SHP = 21MHz RISET=15k
PARAMETER Supply voltage Analogue supply current - active Digital supply current - active (Note 1) Clock supply current - active Supply current - standby (Total) IA A C T IDACT ICACT ISDBY SHD/SHP = 0MHz SYMBOL TEST CONDITIONS MIN 2.97 68 8 6 10 10 TYP MAX 3.63 80 UNIT V mA mA mA µA
SHD/SHP = 12MHz RISET=22k
PARAMETER Supply voltage Analogue supply current - active Digital supply current - active (Note 1) Clock supply current - active Supply current standby (Total) Note 1: IA A C T IDACT ICACT ISDBY SHD/SHP = 0MHz SYMBOL TEST CONDITIONS MIN 2.97 50 4 4 10 TYP MAX 3.63 UNIT V mA mA mA µA
Digital supply current - active includes DVDD4 current, which is dependent on the D[9:0] capacitive load.
WOLFSON MICROELECTRONICS LTD
PP Rev 1.0 March 2000
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