SBASA46
May
2022
ADC3644
PRODUCTION DATA
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1 Features
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2 Applications
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3 Description
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4 Revision History
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5 Pin Configuration and Functions
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6 Specifications
- 6.1
Absolute Maximum Ratings
- 6.2
ESD Ratings
- 6.3
Recommended Operating Conditions
- 6.4
Thermal Information
- 6.5
Electrical Characteristics - Power Consumption
- 6.6
Electrical Characteristics - DC Specifications
- 6.7
Electrical Characteristics - AC Specifications
- 6.8
Timing Requirements
- 6.9
Typical Characteristics
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7 Parameter Measurement Information
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8 Detailed Description
- 8.1
Overview
- 8.2
Functional Block Diagram
- 8.3
Feature Description
- 8.3.1
Analog Input
- 8.3.1.1
Analog Input Bandwidth
- 8.3.1.2
Analog Front End Design
- 8.3.1.2.1
Sampling Glitch Filter Design
- 8.3.1.2.2
Single Ended Input
- 8.3.1.2.3
Analog Input Termination and DC Bias
- 8.3.1.2.3.1
AC-Coupling
- 8.3.1.2.3.2
DC-Coupling
- 8.3.2
Clock Input
- 8.3.2.1
Clock Amplitude
- 8.3.2.2
Single Ended vs Differential Clock Input
- 8.3.3
Voltage Reference
- 8.3.3.1
Internal voltage reference
- 8.3.3.2
External voltage reference (VREF)
- 8.3.3.3
External voltage reference with internal buffer (REFBUF)
- 8.3.4
Digital Down Converter
- 8.3.4.1
DDC MUX
- 8.3.4.2
Digital Filter Operation
- 8.3.4.3
FS/4 Mixing with Real Output
- 8.3.4.4
Numerically Controlled Oscillator (NCO) and Digital Mixer
- 8.3.4.5
Decimation Filter
- 8.3.4.6
SYNC
- 8.3.4.7
Output Formatting with Decimation
- 8.3.4.7.1
Parallel CMOS
- 8.3.4.7.2
Serialized CMOS Interface
- 8.3.5
Digital Interface
- 8.3.5.1
Parallel CMOS Output
- 8.3.5.2
Serialized CMOS output
- 8.3.5.2.1
SDR Output Clocking
- 8.3.5.3
Output Data Format
- 8.3.5.4
Output Formatter
- 8.3.5.5
Output Bit Mapper
- 8.3.5.6
Output Interface or Mode Configuration
- 8.3.5.6.1
Configuration Example
- 8.3.6
Test Pattern
- 8.4
Device Functional Modes
- 8.4.1
Normal operation
- 8.4.2
Power Down Options
- 8.5
Programming
- 8.5.1
Configuration using PINs only
- 8.5.2
Configuration using the SPI interface
- 8.5.2.1
Register Write
- 8.5.2.2
Register Read
- 8.6
Register Maps
- 8.6.1
Detailed Register Description
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9 Application Information Disclaimer
- 9.1
Typical Application
- 9.1.1
Design Requirements
- 9.1.2
Detailed Design Procedure
- 9.1.2.1
Input Signal Path
- 9.1.2.2
Sampling Clock
- 9.1.2.3
Voltage Reference
- 9.1.3
Application Curves
- 9.2
Initialization Set Up
- 9.2.1
Register Initialization During Operation
- 9.3
Power Supply Recommendations
- 9.4
Layout
- 9.4.1
Layout Guidelines
- 9.4.2
Layout Example
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10Device and Documentation Support
- 10.1
Device Support (Optional)
- 10.1.1
Development Support (Optional)
- 10.1.2
Device Nomenclature (Optional)
- 10.2
Documentation Support (if applicable)
- 10.2.1
Related Documentation
- 10.3
Receiving Notification of Documentation Updates
- 10.4
Support Resources
- 10.5
Trademarks
- 10.6
Electrostatic Discharge Caution
- 10.7
Glossary
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11Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
1 Features
- Dual channel
- 14-bit 125 MSPS ADC
- Noise floor: –153 dBFS/Hz
- Ultra-low power with optimized power scaling:
82 mW/ch (125 MSPS) - Latency: 1 clock cycle
- 14-Bit, no missing codes
- INL: ±1.5 LSB; DNL: ±0.5 LSB
- Reference: external or internal
- Industrial temperature range: –40°C to +105°C
- On-chip digital filter (optional)
- Decimation by 2, 4, 8, 16, 32
- 32-bit NCO
- DDR and Serial CMOS interface
- Small footprint: 40-WQFN (5 mm × 5 mm) package
- Single 1.8-V supply
- Spectral performance (fIN = 5 MHz):
- SNR: 74.0 dBFS
- SFDR: 90-dBc HD2, HD3
- SFDR: 100-dBFS worst spur
- Spectral performance (fIN = 70 MHz):
- SNR: 72.5 dBFS
- SFDR: 70-dBc HD2, HD3
- SFDR: 85-dBFS worst spur