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

Atmega32 adc sampling rate?

Status
Not open for further replies.
A

aniket433

Junior Member level 2
Joined
Oct 20, 2011
Messages
20
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,408
Hello i using atmega32 for sampling the analog signals. with 16 Mhz crystal i think i will get 16mhz/128=125khz adc clock frequency
then what would be the maximum analog frequency i can sample with this circuit?
 

The Atmel ATmega series offers a maximum sample rate of 15kSPS at a resolution of 10 bits.

Reference: ATmega32(L) Datasheet, Section: Analog to Digital Converter, Page: 201

• 10-bit Resolution
• 0.5 LSB Integral Non-linearity
• ±2 LSB Absolute Accuracy
• 13 μs - 260 μs Conversion Time
• Up to 15 kSPS at Maximum Resolution
• 8 Multiplexed Single Ended Input Channels
• 7 Differential Input Channels
• 2 Differential Input Channels with Optional Gain of 10x and 200x
• Optional Left adjustment for ADC Result Readout
• 0 - Vcc ADC Input Voltage Range
• Selectable 2.56V ADC Reference Voltage
• Free Running or Single Conversion Mode
• ADC Start Conversion by Auto Triggering on Interrupt Sources
• Interrupt on ADC Conversion Complete
• Sleep Mode Noise Canceler
Click to expand...

Conversion Timing is discussed in the same datasheet on page 204.

BigDog
 

- - - Updated - - -

i want to know what would be the max analog signal frequency i can apply at adc input practically for proper sampling..
 

nyquist says...

15KHz/2 = 7.5KHz

so your input signal better have all of it's frequency components below 7.5KHz if you want "good" sampled data.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top