*Status Report onADC developments@ LPC Clermont-FerrandLaurent ROYER, Samuel MANEN

*

06/02/2008

A 12-bit 3.5V Wilkinson ADC*Royer @ Calice/Eudet electronic meeting London 2008

Royer @ Calice/Eudet electronic meeting London 2008

06/02/2008

*cCharacteristics:

Techno: BiCMOS SiGe 0.35m

Power consumption: 3 mW @ 3.5V

Power pulsing

Conversion time : 80s @50MHz

Differential architecture

Open loop ramp generator

Die area: 0.12 mm2

12-bit Wilkinson ADC in SKIROCLayout of the ADCOne channel SKIROC diagram

ADC/LPC

06/02/2008

SKIROC measurements @ LPC*

Comparator signalAnalog signal in SCASC1SC2SC3SC4SC5t1t3t2t4t5Status:One test board given by LAL @ LPC to test ADCs

LabView Control program developed by LAL used to configure SKIROC through USB interface

Several bugs found in the digital part (in FPGA)Fixed by LAL

ADC functionality checked with scope

06/02/2008

SKIROC measurements @ LPC*

Analog signal on SCA

USB

USB

Pulse signalon SKIROC inputADCSKIROC chipLAL test boardLPC test boardRemote Pulse generatorSetup to test the (preampli + shaper) linearityTo measure ADC performance, the automatic transfer of the ADC digital data from FPGA to PC via USB is requiredunder devpt @ LAL

We have adapted the setup of the test bench @ LPC to measure linearity of the analog channel (preamp + shaper) and to compare results with those obtained @ LAL

06/02/2008

Linearity measurements @ LAL*Not expected saturation observed @ 1200 MIPs

linearity

-0.0000325171-0.00254415890

0.0416723420.03961245120.06977

0.0837999220.08165115570.1394

0.125045930.12371129760.2088

0.1657933440.16508490740.2782

0.2075487850.2078101440.3474

0.2541781630.24985420790.4166

0.2899757670.29193578720.4856

0.3309724780.33395037460.5546

0.3720378360.37602552270.6234

0.4217635550.42337319470.6922

0.466582820.47063511710.7607

0.5087898860.5126952590.829

0.5510294690.5547302120.897

0.5942337230.59676194940.9645

0.6372356490.63880869291.031

0.680833720.68115823941.095

0.7241824940.72284858651.149

0.7680009580.76486049431.191

0.8162236690.80690455811.222

0.8476784470.84836981271.244

0.8795595590.90141661251.261

0.9019637720.94349283241.273

0.9225650980.98523677291.282

0.9422414961.02757560081.288

0.9594755061.06959822731.293

1.296

1.299

1.301

1.302

1.303

Measurement

Meas. linear fit

Simulation

Injection (MIP)

Output (V)

SKIROC linearity results

residuals

-0.0025116418

-0.0020598908

-0.0021487663

-0.0013346324

-0.0007084366

0.000261359

-0.0043239551

0.0019600202

0.0029778966

0.0039876867

0.0016096397

0.0040522971

0.003905373

0.003700743

0.0025282264

0.0015730439

0.0003245194

-0.0013339075

-0.0031404637

-0.0093191109

Input (MIP)

residuals (%)

Residuals

3

commandepulseroutlinearresiduals1.4833504837-7.0416797568Injection (MIP)Output (V)linearresiduals0.000704964-0.0025441589

0.0000.000-0.090-7.042-6.952-0.0030-0.0000325171-0.003-0.25%Input Charge (MIP)Shaper G1 output (V)0.00066575270.0152934286

0.08078.660115.340109.639-5.701-0.00259.79966428260.0416723420.040-0.21%000.0151.53%

0.160157.100231.940225.993-5.947-0.002119.43207804210.0837999220.082-0.21%1000.069770.0821.21%

0.240235.580346.100342.406-3.694-0.001179.09490098770.125045930.124-0.13%2000.13940.1480.90%

0.320312.779458.880456.919-1.961-0.001237.78386975140.1657933440.165-0.07%3000.20880.2150.62%

0.400392.500574.450575.1730.7230.000298.39013769280.2075487850.2080.03%4000.27820.2820.34%

0.480470.950703.510691.542-11.968-0.005358.03015374880.2541781630.250-0.43%5000.34740.3480.08%

0.560549.470802.590808.0155.4250.002417.72338588040.2899757670.2920.20%6000.41660.415-0.19%

0.640627.865916.060924.3028.2420.003477.32158930570.3309724780.3340.30%7000.48560.481-0.43%

0.720706.3731029.7201040.75711.0370.004537.00569868150.3720378360.3760.40%8000.55460.548-0.67%

0.800794.7191167.3501171.8054.4550.002604.16894735560.4217635550.4230.16%9000.62340.614-0.89%

0.880882.9051291.4001302.61611.2160.004671.21055928570.466582820.4710.41%10000.69220.681-1.12%

0.960961.3851408.2201419.02910.8090.004730.87338223130.5087898860.5130.39%11000.76070.748-1.31%

1.0401039.8181525.1301535.37310.2430.004790.50047438330.5510294690.5550.37%12000.8290.814-1.48%

1.1201118.2451644.7101651.7086.9980.003850.12300515740.5942337230.5970.25%13000.8970.881-1.62%

1.2001196.7001763.7301768.0844.3540.002909.76682236170.6372356490.6390.16%14000.96450.947-1.72%

1.2801275.7201884.4001885.2980.8980.000969.84016931830.680833720.6810.03%15001.0311.014-1.71%

1.3601353.5102004.3802000.688-3.692-0.0011028.97843380530.7241824940.723-0.13%16001.0951.080-1.45%

1.4401431.9002125.6602116.968-8.692-0.0031088.57283608230.7680009580.765-0.31%17001.1491.147-0.19%

1.5201510.3502259.1302233.337-25.793-0.0101148.21285213840.8162236690.807-0.93%18001.1911.2142.26%

1.6001587.7202346.1902348.1041.9140.0011207.03182017220.8476784470.8480.07%19001.2221.2805.82%

1.6801686.7002434.4302494.92660.4960.0241282.27935094630.8795595590.9012.19%20001.2441.34710.28%

1.7601765.2102496.4402611.383114.9430.0461341.96498078140.9019637720.9434.15%21001.2611.41315.24%

1.8401843.1002553.4602726.922173.4620.0691401.17926823340.9225650980.9856.27%22001.2731.48020.69%

1.9201922.1002607.9202844.106236.1860.0941461.2374105970.9422414961.0288.53%23001.2821.54726.45%

2.0002000.5102655.6202960.416304.7960.1221520.8470174670.9594755061.07011.01%24001.2881.61332.51%

25001.2931.68038.67%

26001.2961.74645.03%

27001.2991.81351.38%

28001.3011.87957.84%

29001.3021.94664.40%

30001.3032.01370.96%

linearity

-0.0000325171-0.00254415890

0.0416723420.03961245120.06977

0.0837999220.08165115570.1394

0.125045930.12371129760.2088

0.1657933440.16508490740.2782

0.2075487850.2078101440.3474

0.2541781630.24985420790.4166

0.2899757670.29193578720.4856

0.3309724780.33395037460.5546

0.3720378360.37602552270.6234

0.4217635550.42337319470.6922

0.466582820.47063511710.7607

0.5087898860.5126952590.829

0.5510294690.5547302120.897

0.5942337230.59676194940.9645

0.6372356490.63880869291.031

0.680833720.68115823941.095

0.7241824940.72284858651.149

0.7680009580.76486049431.191

0.8162236690.80690455811.222

0.8476784470.84836981271.244

0.8795595590.90141661251.261

0.9019637720.94349283241.273

0.9225650980.98523677291.282

0.9422414961.02757560081.288

0.9594755061.06959822731.293

1.296

1.299

1.301

1.302

1.303

Measurement

Meas. linear fit

Simulation

Injection (MIP)

Output (V)

SKIROC linearity results

residuals

-0.0025116418

-0.0020598908

-0.0021487663

-0.0013346324

-0.0007084366

0.000261359

-0.0043239551

0.0019600202

0.0029778966

0.0039876867

0.0016096397

0.0040522971

0.003905373

0.003700743

0.0025282264

0.0015730439

0.0003245194

-0.0013339075

-0.0031404637

-0.0093191109

Input (MIP)

residuals (%)

Residuals

3

commandepulseroutlinearresiduals1.4833504837-7.0416797568Injection (MIP)Output (V)linearresiduals0.000704964-0.0025441589

0.0000.000-0.090-7.042-6.952-0.0030-0.0000325171-0.003-0.25%Input Charge (MIP)Shaper G1 output (V)0.00066575270.0152934286

0.08078.660115.340109.639-5.701-0.00259.79966428260.0416723420.040-0.21%000.0151.53%

0.160157.100231.940225.993-5.947-0.002119.43207804210.0837999220.082-0.21%1000.069770.0821.21%

0.240235.580346.100342.406-3.694-0.001179.09490098770.125045930.124-0.13%2000.13940.1480.90%

0.320312.779458.880456.919-1.961-0.001237.78386975140.1657933440.165-0.07%3000.20880.2150.62%

0.400392.500574.450575.1730.7230.000298.39013769280.2075487850.2080.03%4000.27820.2820.34%

0.480470.950703.510691.542-11.968-0.005358.03015374880.2541781630.250-0.43%5000.34740.3480.08%

0.560549.470802.590808.0155.4250.002417.72338588040.2899757670.2920.20%6000.41660.415-0.19%

0.640627.865916.060924.3028.2420.003477.32158930570.3309724780.3340.30%7000.48560.481-0.43%

0.720706.3731029.7201040.75711.0370.004537.00569868150.3720378360.3760.40%8000.55460.548-0.67%

0.800794.7191167.3501171.8054.4550.002604.16894735560.4217635550.4230.16%9000.62340.614-0.89%

0.880882.9051291.4001302.61611.2160.004671.21055928570.466582820.4710.41%10000.69220.681-1.12%

0.960961.3851408.2201419.02910.8090.004730.87338223130.5087898860.5130.39%11000.76070.748-1.31%

1.0401039.8181525.1301535.37310.2430.004790.50047438330.5510294690.5550.37%12000.8290.814-1.48%

1.1201118.2451644.7101651.7086.9980.003850.12300515740.5942337230.5970.25%13000.8970.881-1.62%

1.2001196.7001763.7301768.0844.3540.002909.76682236170.6372356490.6390.16%14000.96450.947-1.72%

1.2801275.7201884.4001885.2980.8980.000969.84016931830.680833720.6810.03%15001.0311.014-1.71%

1.3601353.5102004.3802000.688-3.692-0.0011028.97843380530.7241824940.723-0.13%16001.0951.080-1.45%

1.4401431.9002125.6602116.968-8.692-0.0031088.57283608230.7680009580.765-0.31%17001.1491.147-0.19%

1.5201510.3502259.1302233.337-25.793-0.0101148.21285213840.8162236690.807-0.93%18001.1911.2142.26%

1.6001587.7202346.1902348.1041.9140.0011207.03182017220.8476784470.8480.07%19001.2221.2805.82%

1.6801686.7002434.4302494.92660.4960.0241282.27935094630.8795595590.9012.19%20001.2441.34710.28%

1.7601765.2102496.4402611.383114.9430.0461341.96498078140.9019637720.9434.15%21001.2611.41315.24%

1.8401843.1002553.4602726.922173.4620.0691401.17926823340.9225650980.9856.27%22001.2731.48020.69%

1.9201922.1002607.9202844.106236.1860.0941461.2374105970.9422414961.0288.53%23001.2821.54726.45%

2.0002000.5102655.6202960.416304.7960.1221520.8470174670.9594755061.07011.01%24001.2881.61332.51%

25001.2931.68038.67%

26001.2961.74645.03%

27001.2991.81351.38%

28001.3011.87957.84%

29001.3021.94664.40%

30001.3032.01370.96%

06/02/2008

Linearity measurements @ LPC*Shaper: Gain 1

linearity

-0.0000325171-0.00254415890

0.0416723420.03961245120.06977

0.0837999220.08165115570.1394

0.125045930.12371129760.2088

0.1657933440.16508490740.2782

0.2075487850.2078101440.3474

0.2541781630.24985420790.4166

0.2899757670.29193578720.4856

0.3309724780.33395037460.5546

0.3720378360.37602552270.6234

0.4217635550.42337319470.6922

0.466582820.47063511710.7607

0.5087898860.5126952590.829

0.5510294690.5547302120.897

0.5942337230.59676194940.9645

0.6372356490.63880869291.031

0.680833720.68115823941.095

0.7241824940.72284858651.149

0.7680009580.76486049431.191

0.8162236690.80690455811.222

0.8476784470.84836981271.244

0.8795595590.90141661251.261

0.9019637720.94349283241.273

0.9225650980.98523677291.282

0.9422414961.02757560081.288

0.9594755061.06959822731.293

1.296

1.299

1.301

1.302

1.303

Measurement

Meas. linear fit

Simulation

Injection (MIP)

Output (V)

SKIROC linearity results

residuals

-0.0025116418

-0.0020598908

-0.0021487663

-0.0013346324

-0.0007084366

0.000261359

-0.0043239551

0.0019600202

0.0029778966

0.0039876867

0.0016096397

0.0040522971

0.003905373

0.003700743

0.0025282264

0.0015730439

0.0003245194

-0.0013339075

-0.0031404637

-0.0093191109

Input (MIP)

residuals (%)

Residuals

3

commandepulseroutlinearresiduals1.4833504837-7.0416797568Injection (MIP)Output (V)linearresiduals0.000704964-0.0025441589

0.0000.000-0.090-7.042-6.952-0.0030-0.0000325171-0.003-0.25%Input Charge (MIP)Shaper G1 output (V)0.00066575270.0152934286

0.08078.660115.340109.639-5.701-0.00259.79966428260.0416723420.040-0.21%000.0151.53%

0.160157.100231.940225.993-5.947-0.002119.43207804210.0837999220.082-0.21%1000.069770.0821.21%

0.240235.580346.100342.406-3.694-0.001179.09490098770.125045930.124-0.13%2000.13940.1480.90%

0.320312.779458.880456.919-1.961-0.001237.78386975140.1657933440.165-0.07%3000.20880.2150.62%

0.400392.500574.450575.1730.7230.000298.39013769280.2075487850.2080.03%4000.27820.2820.34%

0.480470.950703.510691.542-11.968-0.005358.03015374880.2541781630.250-0.43%5000.34740.3480.08%

0.560549.470802.590808.0155.4250.002417.72338588040.2899757670.2920.20%6000.41660.415-0.19%

0.640627.865916.060924.3028.2420.003477.32158930570.3309724780.3340.30%7000.48560.481-0.43%

0.720706.3731029.7201040.75711.0370.004537.00569868150.3720378360.3760.40%8000.55460.548-0.67%

0.800794.7191167.3501171.8054.4550.002604.16894735560.4217635550.4230.16%9000.62340.614-0.89%

0.880882.9051291.4001302.61611.2160.004671.21055928570.466582820.4710.41%10000.69220.681-1.12%

0.960961.3851408.2201419.02910.8090.004730.87338223130.5087898860.5130.39%11000.76070.748-1.31%

1.0401039.8181525.1301535.37310.2430.004790.50047438330.5510294690.5550.37%12000.8290.814-1.48%

1.1201118.2451644.7101651.7086.9980.003850.12300515740.5942337230.5970.25%13000.8970.881-1.62%

1.2001196.7001763.7301768.0844.3540.002909.76682236170.6372356490.6390.16%14000.96450.947-1.72%

1.2801275.7201884.4001885.2980.8980.000969.84016931830.680833720.6810.03%15001.0311.014-1.71%

1.3601353.5102004.3802000.688-3.692-0.0011028.97843380530.7241824940.723-0.13%16001.0951.080-1.45%

1.4401431.9002125.6602116.968-8.692-0.0031088.57283608230.7680009580.765-0.31%17001.1491.147-0.19%

1.5201510.3502259.1302233.337-25.793-0.0101148.21285213840.8162236690.807-0.93%18001.1911.2142.26%

1.6001587.7202346.1902348.1041.9140.0011207.03182017220.8476784470.8480.07%19001.2221.2805.82%

1.6801686.7002434.4302494.92660.4960.0241282.27935094630.8795595590.9012.19%20001.2441.34710.28%

1.7601765.2102496.4402611.383114.9430.0461341.96498078140.9019637720.9434.15%21001.2611.41315.24%

1.8401843.1002553.4602726.922173.4620.0691401.17926823340.9225650980.9856.27%22001.2731.48020.69%

1.9201922.1002607.9202844.106236.1860.0941461.2374105970.9422414961.0288.53%23001.2821.54726.45%

2.0002000.5102655.6202960.416304.7960.1221520.8470174670.9594755061.07011.01%24001.2881.61332.51%

25001.2931.68038.67%

26001.2961.74645.03%

27001.2991.81351.38%

28001.3011.87957.84%

29001.3021.94664.40%

30001.3032.01370.96%

06/02/2008

Linearity measurements @ LPC*Same saturation observed @ LAL &LPC: >>> not induced by the test bench

linearity

-0.0000325171-0.00254415890

0.0416723420.03961245120.06977

0.0837999220.08165115570.1394

0.125045930.12371129760.2088

0.1657933440.16508490740.2782

0.2075487850.2078101440.3474

0.2541781630.24985420790.4166

0.2899757670.29193578720.4856

0.3309724780.33395037460.5546

0.3720378360.37602552270.6234

0.4217635550.42337319470.6922

0.466582820.47063511710.7607

0.5087898860.5126952590.829

0.5510294690.5547302120.897

0.5942337230.59676194940.9645

0.6372356490.63880869291.031

0.680833720.68115823941.095

0.7241824940.72284858651.149

0.7680009580.76486049431.191

0.8162236690.80690455811.222

0.8476784470.84836981271.244

0.8795595590.90141661251.261

0.9019637720.94349283241.273

0.9225650980.98523677291.282

0.9422414961.02757560081.288

0.9594755061.06959822731.293

1.296

1.299

1.301

1.302

1.303

Measurement

Meas. linear fit

Simulation

Injection (MIP)

Output (V)

SKIROC linearity results

residuals

-0.0025116418

-0.0020598908

-0.0021487663

-0.0013346324

-0.0007084366

0.000261359

-0.0043239551

0.0019600202

0.0029778966

0.0039876867

0.0016096397

0.0040522971

0.003905373

0.003700743

0.0025282264

0.0015730439

0.0003245194

-0.0013339075

-0.0031404637

-0.0093191109

Input (MIP)

residuals (%)

Residuals

3

commandepulseroutlinearresiduals1.4833504837-7.0416797568Injection (MIP)Output (V)linearresiduals0.000704964-0.0025441589

0.0000.000-0.090-7.042-6.952-0.0030-0.0000325171-0.003-0.25%Input Charge (MIP)Shaper G1 output (V)0.00066575270.0152934286

0.08078.660115.340109.639-5.701-0.00259.79966428260.0416723420.040-0.21%000.0151.53%

0.160157.100231.940225.993-5.947-0.002119.43207804210.0837999220.082-0.21%1000.069770.0821.21%

0.240235.580346.100342.406-3.694-0.001179.09490098770.125045930.124-0.13%2000.13940.1480.90%

0.320312.779458.880456.919-1.961-0.001237.78386975140.1657933440.165-0.07%3000.20880.2150.62%

0.400392.500574.450575.1730.7230.000298.39013769280.2075487850.2080.03%4000.27820.2820.34%

0.480470.950703.510691.542-11.968-0.005358.03015374880.2541781630.250-0.43%5000.34740.3480.08%

0.560549.470802.590808.0155.4250.002417.72338588040.2899757670.2920.20%6000.41660.415-0.19%

0.640627.865916.060924.3028.2420.003477.32158930570.3309724780.3340.30%7000.48560.481-0.43%

0.720706.3731029.7201040.75711.0370.004537.00569868150.3720378360.3760.40%8000.55460.548-0.67%

0.800794.7191167.3501171.8054.4550.002604.16894735560.4217635550.4230.16%9000.62340.614-0.89%

0.880882.9051291.4001302.61611.2160.004671.21055928570.466582820.4710.41%10000.69220.681-1.12%

0.960961.3851408.2201419.02910.8090.004730.87338223130.5087898860.5130.39%11000.76070.748-1.31%

1.0401039.8181525.1301535.37310.2430.004790.50047438330.5510294690.5550.37%12000.8290.814-1.48%

1.1201118.2451644.7101651.7086.9980.003850.12300515740.5942337230.5970.25%13000.8970.881-1.62%

1.2001196.7001763.7301768.0844.3540.002909.76682236170.6372356490.6390.16%14000.96450.947-1.72%

1.2801275.7201884.4001885.2980.8980.000969.84016931830.680833720.6810.03%15001.0311.014-1.71%

1.3601353.5102004.3802000.688-3.692-0.0011028.97843380530.7241824940.723-0.13%16001.0951.080-1.45%

1.4401431.9002125.6602116.968-8.692-0.0031088.57283608230.7680009580.765-0.31%17001.1491.147-0.19%

1.5201510.3502259.1302233.337-25.793-0.0101148.21285213840.8162236690.807-0.93%18001.1911.2142.26%

1.6001587.7202346.1902348.1041.9140.0011207.03182017220.8476784470.8480.07%19001.2221.2805.82%

1.6801686.7002434.4302494.92660.4960.0241282.27935094630.8795595590.9012.19%20001.2441.34710.28%

1.7601765.2102496.4402611.383114.9430.0461341.96498078140.9019637720.9434.15%21001.2611.41315.24%

1.8401843.1002553.4602726.922173.4620.0691401.17926823340.9225650980.9856.27%22001.2731.48020.69%

1.9201922.1002607.9202844.106236.1860.0941461.2374105970.9422414961.0288.53%23001.2821.54726.45%

2.0002000.5102655.6202960.416304.7960.1221520.8470174670.9594755061.07011.01%24001.2881.61332.51%

25001.2931.68038.67%

26001.2961.74645.03%

27001.2991.81351.38%

28001.3011.87957.84%

29001.3021.94664.40%

30001.3032.01370.96%

06/02/2008

A 12-bit 3.5V Cyclic ADC*

06/02/2008

*Objective :Design a 12-bit cyclic ADC with 3.5V power sup. based on the buildings blocks of the pipeline ADC but with a lower power supply (5V 3.5V)Gain 2 accuracy required for a 12-bit ADC is multiplied by 4 compare to a 10-bit ADC10 bits ADC accuracy is 1/100012 bits ADC accuracy is 1/4000Two chips designed to characterize

two main elements of 12-bit cyclic ADCComparator (July 06)Gain-2 amplifier (July 07)

12 bits 3.5V cyclic ADC

06/02/2008

*Comparator measurementsCharacteristics:Technology: CMOS 0.35mPower supply: 3V Clock frequency: 10 MHzDifferential architectureConsumption: 68A7 chips tested

Max. Sensitivity: 3 mV @ 3 including setup noiseMax. Offset: 10 mV Requirement: < 125 mV10 mVOffset measurementsSensitivity measurements3 mV0 mV

06/02/2008

*Gain-2 amplifier: preliminary resultsTechnology: CMOS 0.35mPower supply: 3.5V Differential architectureConsumption: 2.8 mW

Gain : 16 kGain Band product: 50 MHzLinear, StableMatching of capacitors optimized (precision of gain 2)

Characteristics & performance:10-bit version amplifier New 12-bit version amplifier Systematic error introduced by test bench

1LSB

*

06/02/2008

Simulation of the 12-bit cyclic ADC*An original architecture:One gain-2 amplifier and two comparators requiredOnly 6 periods of clock needed to achieve a conversion Simulated performance:Integral Non-Linearity nearly within 1 LSBConversion time (clock freq. of 1MHz) : 6 sPower consumption: 3.2 mW

Integral Non-Linearity (simulated)

06/02/2008

Summary* Our Wilkinson ADC is a candidate for the EUDET VFE chip IF its performance is confirmed by measurements Our cyclic ADC, which is an evolution of the pipeline ADC, should be a good candidate to the final chip (accurated, low power, compact)

Fabrication and test of prototypes foreseen in 2008

# bitsPrecisionInteg. consum.per channelDie areaStatusPipeline1010 bits0.22 W (1%)1 ADC/n channels1.4mm2Tested & publicatedWilkinson1212 bits @ low energy10 bits @ high energy6 W (13%)1 ADC/channel0.12mm2in SKIROCTest in progressCyclic1212 bits 0.5 W (2%)1 ADC/channel 0.15 mm2in developtBuilding blocks validated

*

*SKIROC linearity results

0

0,2

0,4

0,6

0,8

1

1,2

1,4

050010001500200025003000

Injection (MIP)

Output (V)

Measurement

Meas. linear fit

Simulation

Residuals

-1,00%

-0,80%

-0,60%

-0,40%

-0,20%

0,00%

0,20%

0,40%

0,60%

0200400600800100012001400

Input (MIP)

residuals (%)