Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Help me choose a low power CMOS ADC

Status
Not open for further replies.
R

rogger123

Advanced Member level 4
Joined
Apr 9, 2003
Messages
112
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Activity points
1,232
12bit sar adc 1uw

I need some help to choose a low power CMOS ADC to meet the following requirments

Resolution: 16 bits, (< 0.5LSB, DNL and INL)
Max. Signal Frequency: 100Hz
Input: Differential 2V p-p
Output: I2C serial digital
Power Supply: 3V +/- 20%
Process: ~ 0.5um CMOS (via MOSIS)
Standby Power: < 1uW
Active Power: < 100uW
Area: < 1mm*1mm
Temp Range: 0-40C

ThankX
rogger123
 

Re: need help for ADC design

You can reference this thesis
 

Re: need help for ADC design

Any architecture best suitable for my specifications

rogger123
 

need help for ADC design

I think the sigma-Delta ADC is suit your specific
 

Re: need help for ADC design

SAR ADC may be more suitable
 

Re: need help for ADC design

Sigma delta or integration.
See the attached article for adc type selection.
 

Re: need help for ADC design

zouwanghui said:
SAR ADC may be more suitable
Click to expand...

no

SAR R2R only for 8bit ( resistor /switch mismatch issue)
Cap charge share -> 10bit

if SAR use > 12bit use R_string + Cap

for low freq < 1K

I think you can use

dual slow or delta_sigma
 

Re: need help for ADC design

Hi
Can someone suggest some reference material for either SAR or sigma delta architectures
 

Re: need help for ADC design

This is for you reference .
 

Re: need help for ADC design

hi
Would it be a good idea to use Switched opams for ultra low power and use algorithmic ADCs. if so can i get some material that describes the concepts for both swithched opamp and algorithmic ADC's.
when do we need to use Switched capacitor circuits ? are they low power designs?
 

Re: need help for ADC design

Thanks for the Thesis Friend
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top