Texas Instruments ADC3683 Handleiding
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ADC368x 18-bit 0.5 to 65-MSPS Low Noise Ultra-low Power Dual Channel ADC
1 Features
•Dual channel ADC
•18-bit 10, 25, 65 MSPS ADC
•Noise floor: -160 dBFS/Hz
•Low power and optimized power scaling:
53 mW/ch (10 MSPS) to 94 mW/ch (65 MSPS)
•Latency: 1-2 clock cycles
•18-bit, no missing codes
•INL/DNL: ±7/ ±0.7 LSB (typical)
•Reference: external or internal
•Input bandwidth: 900 MHz (3-dB)
•Industrial temperature range: -40 to +105°C
•On-chip digital filter (optional)
–Decimation by 2, 4, 8, 16, 32
–32-bit NCO
•Serial LVDS digital interface (2-, 1- and 1/2-wire)
•Small footprint: 40-QFN (5x5 mm) package
•Spectral performance (f
IN
= 5 MHz):
–SNR: 83.8 dBFS
–SFDR: 89 dBc HD2, HD3
–SFDR: 101 dBFS Worst spur
•Spectral performance (f
IN
= 20 MHz):
–SNR: 82.6 dBFS
–SFDR: 85 dBc HD2, HD3
–SFDR: 97 dBFS Worst spur
2 Applications
•High-speed data acquisition
•Industrial monitoring
•Software defined radio
•Power quality analyzer
•Source measurement unit (SMU)
•Communications infrastructure
•Spectrum analyzer
•Control loops
•Instrumentation
•Imaging
•Spectroscopy
•Radar
3 Description
The ADC3681, 82, 83 (ADC368x) is a low noise, ultra-
low power 18-bit 65 MSPS high-speed dual channel
ADC family. Designed for lowest noise performance,
it delivers a noise spectral density of -160 dBFS/Hz
combined with excellent linearity and dynamic range.
The ADC368x offers excellent DC precision together
with IF sampling support which makes it suited for a
wide range of applications. High-speed control loops
benefit from the short latency as low as only 1 clock
cycle. The ADC consumes only 94 mW/ch at 65 Msps
and its power consumption scales well with lower
sampling rates.
The ADC368x uses a serial LVDS (SLVDS) interface
to output the data which minimizes the number of
digital interconnects. The device supports two-lane,
one-lane and half-lane options. The ADC36xx is a
pin to pin compatible family of ADCs with 16 and
18-bit resolution and different speed grades. It comes
in a 40-pin QFN package (5 x 5mm) and supports
the extended industrial temperature range from -40 to
+105⁰C.
Package Information
PART NUMBERPACKAGE
(1)
BODY SIZE (NOM)
ADC368xVQFN (40)5.00 mm x 5.00 mm
(1)For all available packages, see the orderable addendum at
the end of the data sheet.
Device Comparison
PART NUMBERRESOLUTIONSAMPLING RATE
ADC368318 BIT65 MSPS
ADC368218 BIT25 MSPS
ADC368118 BIT10 MSPS
FFT: Fs = 65 MSPS, Fin = 5 MHz
ADC3681, ADC3682, ADC3683
SBAS872B – DECEMBER 2020 – REVISED OCTOBER 2022
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Table of Contents
1 Features............................................................................1
2 Applications.....................................................................1
3 Description.......................................................................1
4 Revision History..............................................................2
5 Pin Configuration and Functions...................................3
6 Specifications..................................................................5
6.1 Absolute Maximum Ratings........................................5
6.2 ESD Ratings...............................................................5
6.3 Recommended Operating Conditions.........................5
6.4 Thermal Information....................................................5
6.5 Electrical Characteristics - Power Consumption.........6
6.6 Electrical Characteristics - DC Specifications.............7
6.7 Electrical Characteristics - AC Specifications.............9
6.8 Timing Requirements................................................12
6.9 Typical Characteristics - ADC3681...........................14
6.10 Typical Characteristics - ADC3682.........................17
6.11 Typical Characteristics - ADC3683.........................21
7 Parameter Measurement Information..........................26
8 Detailed Description......................................................28
8.1 Overview...................................................................28
8.2 Functional Block Diagram.........................................28
8.3 Feature Description...................................................29
8.4 Device Functional Modes..........................................50
8.5 Programming............................................................52
8.6 Register Map.............................................................54
9 Application Information Disclaimer.............................69
9.1 Typical Application....................................................69
9.2 Initialization Set Up...................................................72
9.3 Power Supply Recommendations.............................73
9.4 Layout.......................................................................74
10 Device and Documentation Support..........................76
10.1 Receiving Notification of Documentation Updates..76
10.2 Support Resources.................................................76
10.3 Trademarks.............................................................76
10.4 Electrostatic Discharge Caution..............................76
10.5 Glossary..................................................................76
11 Mechanical, Packaging, and Orderable
Information....................................................................76
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (December 2021) to Revision B (October 2022)Page
•Removed the Product Preview note from part number ADC3681 in the Device Comparison table...................1
•Added the Typical Characteristics - ADC3681 graphs......................................................................................14
•Added the Typical Characteristics - ADC3682 graphs......................................................................................17
•Added GND symbol to REFGND pin for all voltage reference option diagrams...............................................34
•Added the Output Bit Mapper section...............................................................................................................46
•Added Table 8-11 .............................................................................................................................................52
•Changed Figure 9-6 diagram with correct indexing .........................................................................................72
Changes from Revision * (December 2020) to Revision A (December 2021)Page
•Removed the Product Preview note from part number ADC3682 in the Device Comparison table...................1
•Changed Sample N+1 position in Figure 7-2 and Figure 7-3 ..........................................................................26
•Added condition to resynch during operation to the SYNC section..................................................................41
ADC3681, ADC3682, ADC3683
SBAS872B – DECEMBER 2020 – REVISED OCTOBER 2022
www.ti.com
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Copyright © 2022 Texas Instruments Incorporated
Product Folder Links: ADC3681 ADC3682 ADC3683
5 Pin Configuration and Functions
1
2
3
4
5
6
7
8
9
10
11121314151617181920
30
29
28
27
26
25
24
23
22
21
40393837363534333231
PDN/SYNC
VREF
REFGND
REFBUF
AVDD
CLKP
CLKM
VCM
RESET
SDIOIOVDD
IOVDD
FCLKM
FCLKP
NC
IOGND
DCLKINP
DCLKINM
DCLKP
DCLKM
GND
AINP
AINM
GND
AVDD
SEN
DA1M
DA1P
DA0M
GND PAD (backside)
DB0P
GND
BINP
BINM
GND
AVDD
SCLK
DB1M
DB1P
DB0M
DA0P
Figure 5-1. RSB (WQQFN) Package, 40-Pin
(Top View)
Table 5-1. Pin Descriptions
PIN
I/ODescription
NameNo.
INPUT/REFERENCE
AINP12IPositive analog input, channel A
AINM13INegative analog input, channel A
BINP39IPositive analog input, channel B
BINM38INegative analog input, channel B
VCM8OCommon-mode voltage output for the analog inputs, 0.95V
VREF2IExternal voltage reference input, 1.6V
REFBUF4I
1.2V external voltage reference input for use with internal reference buffer. Internal 100 kΩ
pull-up resistor to AVDD. This pin is also used to configure default operating conditions.
REFGND3IReference ground input, 0V
CLOCK
CLKP6IPositive differential sampling clock input for the ADC
CLKM7INegative differential sampling clock input for the ADC
CONFIGURATION
PDN/SYNC1I
Power down/Synchronization input. This pin can be configured via the SPI interface. Active
high. This pin has an internal 21 kΩ pull-down resistor.
RESET9IHardware reset. Active high. This pin has an internal 21 kΩ pull-down resistor.
SEN16ISerial interface enable. Active low. This pin has an internal 21 kΩ pull-up resistor to AVDD.
SCLK35ISerial interface clock input. This pin has an internal 21 kΩ pull-down resistor.
SDIO10I/OSerial interface data input and output. This pin has an internal 21 kΩ pull-down resistor.
NC27-Do not connect
www.ti.com
ADC3681, ADC3682, ADC3683
SBAS872B – DECEMBER 2020 – REVISED OCTOBER 2022
Copyright © 2022 Texas Instruments Incorporated
Submit Document Feedback
3
Product Folder Links: ADC3681 ADC3682 ADC3683
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADC3683 |
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