wm2152 12-bit, 30msps adc product preview, march 2001, rev 1.1 wolfson microelectronics ltd 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 www.wolfsonmicro.com product preview data sheets contain specifications for products in the formative phase of development. these products may be changed or discontinued without notice. ? 2001 wolfson microelectronics ltd . description the wm2152 is a high speed 12-bit analogue-to-digital converter operating on a 3.3v supply. this device includes a high bandwidth sample and hold and internal voltage references. conversion is controlled by a single clock input. the device has a differential sample and hold input which gives excellent common-mode noise immunity and low distortion. the maximum differential input voltage can be set by the user, via two mode selection pins, to be 1v or 2v. a third pga mode is designed particularly for single-ended input signals such as composite video sources. single- ended input signals require one side of the differential input to be tied to an external voltage source. the device provides internal reference voltages for setting the adc full-scale range without the requirement for external circuitry. the wm2152 can also accept external reference levels for applications where common or high precision references are required. the wm2152 provides an out of range indicator flag to indicate when the input signal exceeds the converter?s full scale range. an output enable pin allows several devices to share a common bus. power down mode for the device is under the control of the two mode control pins and takes power consumption down to less than 36 w. features ? 12-bit resolution adc ? 30msps conversion rate ? programmable gain amplifier (pga) ? out of range indicator ? low power - 160mw typical at 3.3v supplies ? powerdown mode to 30 w typical ? 66db snr for 3.58mhz input signal ? -78db thd for 3.58mhz input signal ? 28-pin tssop package applications ? direct if sampling ? baseband digitisation ? video digitisation ? portable instrumentation ? digital imaging ? high speed data acquisition block diagram vinp (5) precision reference circuits adc + pga - vinm (6) d[11:0] (12-18, 21-25) output buffers (11) ovrng avdd (8, 27) (9) vrt (10) vrb (26) oeb (19) dgnd (20) dvdd timing control (28) clk configuration control circuit con0 (3) con1 (2) extref (4) avdd (1,7) wm2152
wm2152 product preview wolfson microelectronics ltd pp rev 1.1 march 2001 2 pin configuration ordering information device temp. range package XWM2152CDT 0 to +70 o c 28-pin tssop xwm2152idt -40 to +85 o c 28-pin tssop 16 15 14 20 19 18 17 5 6 7 1 2 3 4 13 12 11 8 9 10 con0 d10 d7 agnd con1 d4 d0 d1 d3 d2 oeb avdd clk ovrng d5 vinp vinm extref vrb dgnd vrt avdd dvdd agnd 21 22 23 24 25 26 27 28 d11 d9 d6 d8 pin description pin name type description 1 agnd supply analogue ground (for timing circuitry) 2 con1 digital input mode control pin 1 3 con0 digital input mode control pin 0 4 extref digital input reference select pin 5 vinp analogue input positive analogue input 6 vinm analogue input negative analogue input 7 agnd supply analogue ground 8 avdd supply analogue power supply 9 vrt analogue i/o upper adc reference voltage 10 vrb analogue i/o lower adc reference voltage 11 ovrng digital output out of range indicator 12 d11 digital output data output bit 11 (msb) 13 d10 digital output data output bit 10 14 d9 digital output data output bit 9 15 d8 digital output data output bit 8 16 d7 digital output data output bit 7 17 d6 digital output data output bit 6 18 d5 digital output data output bit 5 19 dgnd supply digital ground 20 dvdd supply digital power supply 21 d4 digital output data output bit 4 22 d3 digital output data output bit 3 23 d2 digital output data output bit 2 24 d1 digital output data output bit 1 25 d0 digital output data output bit 0 (lsb) 26 oeb digital input output enable (low = enable, high = disable) 27 avdd supply analogue power supply (for timing circuitry) 28 clk digital input adc conversion clock
product preview wm2152 wolfson microelectronics ltd pp rev 1.1 march 2001 3 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. condition min max digital supply voltage, dvdd to dgnd -0.3v +4.0v input clock supply voltage, clkvdd to clkgnd -0.3v +4.0v analogue supply voltage, avdd to agnd -0.3v +4.0v maximum ground difference between agnd, dgnd and clkgnd -0.3v +0.3v voltage range digital inputs dgnd - 0.3v dvdd + 0.3v voltage range analogue inputs agnd - 0.3v avdd + 0.3v voltage range clk input clkgnd - 0.3v clkvdd + 0.3v operating junction temperature range, t j -40 c +150 c storage temperature -65 c +150 c lead temperature (1.6mm from package body for 10 seconds) +300 c
wm2152 product preview wolfson microelectronics ltd pp rev 1.1 march 2001 4 electrical characteristics test conditions: avdd = dvdd = 3.3v, f clk = 30mhz, extref = agnd, mode=1, t a = t min to t max , unless otherwise stated. parameter symbol test conditions min typ max unit dc characteristics resolution 12 bits integral nonlinearity inl all modes -2.5 1.2 +2 lsb differential nonlinearity dnl all modes 0.4 1lsb missing codes all modes no missing codes guaranteed offset error all modes 0.5 1.2 %fsr gain error all modes 0.5 3.5 %fsr dynamic performance (note 1) f in =3.58mhz 10.9 bits f in =10mhz 10.6 10.9 bits effective number of bits enob f in =15mhz 10.8 bits f in =3.58mhz -76 db f in =10mhz -74 -65 db total harmonic distortion thd f in =15mhz -72.5 db f in =3.58mhz 68 db f in =10mhz 66 68 db snr f in =15mhz 67.7 db f in =3.58mhz 67.4 db f in =10mhz 65.6 67.4 db signal to noise and distortion ratio sinad f in =15mhz 66.6 db f in =3.58mhz 78.1 db f in =10mhz 67 76.4 db spurious free dynamic range sfdr f in =15mhz 74.6 db differential phase dp 0.12 deg differential gain dg 0.01 % analogue input signal to (vinp ? vinm) mode=1, vref = 1v -0.5 0.5 v mode=2, vref = 1v -1 1 v input span mode=3, vref = 1v 0 1 v input (vinp or vinm) range all modes 0 avdd v input capacitance c in all modes 6 pf analogue input bandwidth 180 mhz power supply rejection ratio psrr 54 db conversion characteristics conversion frequency f clk 530mhz pipeline delay 5 cycles of clk aperture delay t a 2.0 ns aperture jitter 2.0 ps rms internal voltage references (note 3) upper reference voltage vrt 2.15 v lower reference voltage vrb 1.15 v differential reference voltage (vrt-vrb) vref 0.95 1 1.05 v differential reference voltage (vrt-vrb) accuracy -5 +5 % power up time of references from standby t pu 100 s
product preview wm2152 wolfson microelectronics ltd pp rev 1.1 march 2001 5 test conditions: avdd = dvdd = 3.3v, f clk = 30mhz, extref = agnd, mode=1, t a = t min to t max , unless otherwise stated. parameter symbol test conditions min typ max unit external voltage references externally applied vrt reference range 22.5v externally applied vrb reference range 1.05 1.3 v externally applied differential reference range (vrt-vrb) 0.75 1.05 v reference input resistance (vrt to vrb) 9k ? digital inputs / outputs input low level v il 0.2 x vdd v input high level v ih 0.8 x vdd v high level output voltage v ol i oh =50 a dvdd-0.4 v low level output voltage v oh i ol =-50 a0.4v high impedance output current 1 a rise/fall time c load =10pf 5.5 ns power supplies clkvdd supply current i aa1 f clk = 30mhz 3.0 3.3 3.6 ma avdd supply current i aa2 35 ma dvdd supply current i dd 10 ma total supply current i tot f clk = 30mhz 48.3 ma total supply current in standby mode i sb f clk = 0mhz 10 a power consumption f clk = 30mhz 168 220 mw notes 1. input amplitudes for all single tone dynamic tests are all -0.5dbfs. 2. inputs for two-tone imd are 4.4mhz and 4.5mhz, each at -7dbfs. 3. the internal reference voltage is not intended for use driving off-chip.
wm2152 product preview wolfson microelectronics ltd pp rev 1.1 march 2001 6 typical system performance avdd = dvdd = 3.3v, f s = 30msps -1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1 0 512 1024 1536 2048 2560 3072 3584 4096 digital code differential non-linearity (lsbs) figure 1 differential non-linearity avdd = dvdd = 3.3v, f s = 30msps -1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1 0 512 1024 1536 2048 2560 3072 3584 4096 digital code integral non-linearity (lsbs) figure 2 integral non-linearity
product preview wm2152 wolfson microelectronics ltd pp rev 1.1 march 2001 7 package dimensions notes: a. all linear dimensions are in millimeters. b. this drawing is subject to change without notice. c. body dimensions do not include mold flash or protrusion, not to exceed 0.25mm. d. meets jedec.95 mo-153, variation = ae. refer to this specification for further details. dm022.a dt: 28 pin tssop (9.7 x 4.4 x 1.0 mm) symbols dimensions (mm) min nom max a ----- ----- 1.20 a 1 0.05 ----- 0.15 a 2 0.80 1.00 1.05 b 0.19 ----- 0.30 c 0.09 ----- 0.20 d 9.60 9.70 9.80 e 0.65 bsc e 6.4 bsc e 1 4.30 4.40 4.50 l 0.45 0.60 0.75 0 o ----- 8 o ref: jedec.95, mo-153 c l gauge plane 0.25 15 28 e1 e e b 14 1 d seating plane a a2 a1 -c- 0.1 c
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