Linear Technology: DC1783A Demo Board for LTC23xx-xx with LTC6655-5/LT6350

atomar — Wed, 25 Jun 2014 00:52:44 GMT

Current Revision posted to Documents by atomar on 6/25/2014 12:52:44 AM

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Kit Overview

The LTC2380LTC2380/LTC2379LTC2379/LTC2378LTC2378/LTC2377LTC2377/LTC2376LTC2376 are low power, low noise ADCs with serial outputs that can operate from a single 2.5V supply. The following text refers to the LTC2379-18LTC2379-18 but applies to all parts in the family, the only difference being the maximum sample rates and the number of bits. The LTC2379-18LTC2379-18 supports a ±5V fully differential input range with a 101dB SNR, consumes only 18mW and achieves ±2LSB INL max with no missing codes at 18-bits.

The DC1783ADC1783A demonstrates the DC and AC performance of the LTC2379-18LTC2379-18 in conjunction with the DC590 QuikEval™ and DC718 QuikEval-II data collection boards. Use the DC590 to demonstrate DC performance such as peak-to-peak noise and DC linearity. Use the DC718 if precise sampling rates are required or to demonstrate AC performance such as SNR, THD, SINAD and SFDR. The demonstration circuit 1783A is intended to demonstrate recommended grounding, component placement and selection, routing and bypassing for this ADC. Several suggested driver circuits for the analog inputs will be presented.

Ordering Information:

MPN	Demo Board Description
DC1783A-ADC1783A-A	LTC2380-16LTC2380-16 with LTC6655-5LTC6655-5/LT6350LT6350: 16-Bit, 2Msps, SAR ADC with 96dB SNR
DC1783A-BDC1783A-B	LTC2378-16LTC2378-16 with LTC6655-5LTC6655-5/LT6350LT6350: 16-Bit, 1Msps, SAR ADC with 97dB SNR
DC1783A-CDC1783A-C	LTC2377-16LTC2377-16 with LTC6655-5LTC6655-5/LT6350LT6350: 16-Bit, 500ksps, SAR ADC with 97dB SNR
DC1783A-DDC1783A-D	LTC2376-16LTC2376-16 with LTC6655-5LTC6655-5/LT6350LT6350: 16-Bit, 250ksps, SAR ADC with 97dB SNR
DC1783A-EDC1783A-E	LTC2379-18LTC2379-18 with LTC6655-5LTC6655-5/LT6350LT6350:18-Bit, 1.6Msps, SAR ADC with 101dB SNR
DC1783A-FDC1783A-F	LTC2378-18LTC2378-18 with LTC6655-5LTC6655-5/LT6350LT6350: 18-Bit, 1Msps, SAR ADC with 102dB SNR
DC1783A-GDC1783A-G	LTC2377-18LTC2377-18 with LTC6655-5LTC6655-5/LT6350LT6350:18-Bit, 500ksps, SAR ADC with 102dB SNR
DC1783A-HDC1783A-H	LTC2376-18LTC2376-18 with LTC6655-5LTC6655-5/LT6350LT6350:18-Bit, 250ksps, SAR ADC with 102dB SNR

Key Applications: 16-Bit and 18-Bit SAR ADC Drivers, Single-Ended to Differential Conversion, Differential Line Driver, Instrumentation and Test Equipment, Weigh Scales, Precision Battery Monitors, High Temperature Applications,Medical Imaging, High Speed Data Acquisition, Industrial Process Control, ATE.

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Technical Documents

Learning Center

Type	Description
User Manual	LTC: Demo Manual for DC1783A LTC2380/LTC2379/LTC2378/ LTC2377/LTC2376: 18-Bit/16-Bit, 2Msps/1.6Msps/1Msps/ 500ksps/250ksps Low Power, Low Noise ADCs
Datasheet	LTC: Datasheet for LTC6655 - 0.25ppm Noise, Low Drift Precision Buffered Reference Family
Datasheet	LTC: Datasheet for LT6350 - Low Noise Single-Ended to Differential Converter/ADC Driver
Datasheet	LTC: Datasheet for LTC2380-16 - 16-Bit, 2Msps, Low Power SAR ADC with 96.2dB SNR
Datasheet	LTC: Datasheet for LTC2379-18 - 18-Bit, 1.6Msps, Low Power SAR ADC with 101.2dB SNR
Datasheet	LTC: Datasheet for LTC2378-18 -18-Bit, 1Msps, Low Power SAR ADC with 102dB SNR
Datasheet	LTC: Datasheet for LTC2376-18 - 18-Bit, 250ksps, Low Power SAR ADC with 102dB SNR
Datasheet	LTC: Datasheet for LTC2378-16 - 16-Bit, 1Msps, Low Power SAR ADC with 97dB SNR
Datasheet	LTC: Datasheet for LTC2377-16 - 16-Bit, 500ksps, Low Power SAR ADC with 97dB SNR
Datasheet	LTC: Datasheet for LTC2376-16 - 16-Bit, 250ksps, Low Power SAR ADC with 97dB SNR
Datasheet	LTC: Datasheet for LTC2377-18 - 18-Bit, 500ksps, Low Power SAR ADC with 102dB SNR
Product Brief	LTC: Product Brief for Rail-to-Rail Single-Ended to Differential Amplifier Drives High Speed 16- to 18-bit SAR ADCs
Application Note	LTC: Application Note for Fidelity Testing for A→D Converters

Design Elements

Type	Description
Schematics	LTC: Schematic File for DC1783A
Layout	LTC: Layout File for DC1783A
BOM	LTC: BOM File for DC1783A
Simulation Model	LTC: IBIS MODEL for LTC2380
Application Library	LTC: Software for QuikEval II System

Video

www.youtube.com/watch

Kit Features

Features of LT6350LT6350:

Rail-to-Rail Input and Outputs
Fast Settling Time: 240ns, 0.01%, 8V_P-P Output Step
1.9nV/√Hz Input-Referred Op Amp Noise
High Impedance Input
-3dB Bandwidth: 33MHz
2.7V to 12V Supply Operation
No External Gain Resistors Required
4.8mA Supply Current
Low Power Shutdown
Low Distortion (HD2/HD3): –102dBc/–97dBc at 100kHz, V_OUTDIFF = 4V_P-P
Low Offset Voltage: ±400μV Max
High DC Linearity: <±1LSB, 16-Bit, 8V_P-P
Low Input Current Noise: 1.1pA/√Hz
3mm × 3mm 8-Pin DFN and 8-Lead MSOP Packages

Features of LTC6655LTC6655:

Low Noise: 0.25ppm_P-P (0.1Hz to 10Hz)
625nV_P-P for the LTC6655-2.5LTC6655-2.5
Low Drift: 2ppm/°C Max
High Accuracy: ±0.025% Max
Fully Specified from –40°C to 125°C
100% Tested at –40°C, 25°C and 125°C
Load Regulation: <10ppm/mA
Sinks and Sources Current: ±5mA
Low Dropout: 500mV
Maximum Supply Voltage: 13.2V
Low Power Shutdown: <20μA Max
Available Output Voltages: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V
Available in an 8-Lead MSOP Package

Features of LTC23XX-XX :

MPN	Max Conversion Rate	Number of Bits	Max Clock in Frequency
LTC2380CMS-16LTC2380CMS-16	2Msps	16	100MHz
LTC2378CMS-16LTC2378CMS-16	1Msps	16	50MHz
LTC2377CMS-16LTC2377CMS-16	500ksps	16	25MHz
LTC2376CMS-16LTC2376CMS-16	250ksps	16	12.5MHz
LTC2379CMS-18LTC2379CMS-18	1.6Msps	18	100MHz
LTC2378CMS-18LTC2378CMS-18	1Msps	18	50MHz
LTC2377CMS-18LTC2377CMS-18	500ksps	18	25MHz
LTC2376CMS-18LTC2376CMS-18	250ksps	18	12.5MHz

Digital Gain Compression (DGC)
Guaranteed Operation to 125°C
2.5V Supply
Fully Differential Input Range ±V_REF
V_REFInput Range from 2.5V to 5.1V
No Pipeline Delay, No Cycle Latency
1.8V to 5V I/O Voltages
SPI-Compatible Serial I/O with Daisy-Chain Mode
Internal Conversion Clock
16-Lead MSOP and 4mm × 3mm DFN Packages

Kit Contents

1.The Linear Technology's DC1783A-ADC1783A-A supplied with below contents:

DC1783A-ADC1783A-A Demo Board

2.The Linear Technology's DC1783A-BDC1783A-B supplied with below contents:

DC1783A-BDC1783A-B Demo Board

3.The Linear Technology's DC1783A-CDC1783A-C supplied with below contents:

DC1783A-CDC1783A-C Demo Board

4.The Linear Technology's DC1783A-DDC1783A-D supplied with below contents:

DC1783A-DDC1783A-D Demo Board

5.The Linear Technology's DC1783A-EDC1783A-E supplied with below contents:

DC1783A-EDC1783A-E Demo Board

6.The Linear Technology's DC1783A-FDC1783A-F supplied with below contents:

DC1783A-FDC1783A-F Demo Board

7.The Linear Technology's DC1783A-GDC1783A-G supplied with below contents:

DC1783A-GDC1783A-G Demo Board

8.The Linear Technology's DC1783A-HDC1783A-H supplied with below contents:

DC1783A-HDC1783A-H Demo Board

Tags: dc1783a-f, ltc2378-18, dc1783a, dc1783a-b, ltc2377-18, demo_board, ltc23xx-xx, ltc2376-16, ltc2377-16, dc1783a-c, ltc2380-16, dc1783a-h, dc1783a-g, dc1783a-a, ltc2376-18, ltc2378-16, dc1783a-e, linear_technology, dc1783a-d, lt6350, ltc2379-18, ltc6655-5