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Design DocumentAnalog

LTC2642A-16: 16-Bit Unbuffered Voltage Output DAC Demonstration Circuit DC1096B

Manual for the DC1096B demonstration board featuring the LTC2642A-16 16-bit unbuffered DAC, including schematic, parts list, and configuration options for unipolar or bipolar modes.

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Overview

The DC1096B demonstration circuit features the LTC2642A-16, a 16-bit voltage output DAC with an unbuffered output that allows rail-to-rail swings. As part of the QuikEval family, the board interfaces with the DC590 USB serial controller for performance evaluation via software. The design includes three DACs (U1, U2, and U4) with different output paths: U1 is buffered by an LTC6078, U2 is buffered by an LT1678 with jumper-selectable unipolar or bipolar operation, and U4 provides a direct unbuffered output or an optional buffered path. The board provides onboard voltage reference options of 2.5V (LT1019) or 5V (LT1236) and supports external amplifier supplies.

Use Cases

  • High-resolution voltage output evaluation
  • Precision analog signal generation
  • Testing DAC settling time and glitch impulse
  • Prototyping unipolar and bipolar signal chains
  • Evaluating unbuffered vs. buffered DAC performance

Topics

LTC2642A-16
DC1096B
16-bit DAC
Voltage Output DAC
Unbuffered DAC
LT1678
LTC6078
LT1236
LT1019
QuikEval
Digital-to-Analog Converter
SPI interface

Referenced Parts

2SN-BK-G

Samtec

22 6 JP1-JP4, JP6, JP7 SHUNT SAMTEC 2SN-BK-G

CRCW04024K99FKED

Vishay

13 3 R4, R5, R6 RES, 0402 4.99k 1% 1/16W VISHAY CRCW04024K99FKED

24LC025-I/ST

Microchip

16 1 U3 IC, 24LC025-I/ST MICROCHIP TECH. 24LC025-I/ST

06033C104KAT

AVX

CAP, 0603 0.1μF 10% 25V X7R AVX 06033C104KAT

LT1678CS8#PBF

Linear Technology

IC, LT1678CS8#PBF LINEAR TECH LT1678CS8#PBF

24LC025-I/ST

Microchip

IC, 24LC025-I/ST MICROCHIP TECH. 24LC025-I/ST

60900213421

Wurth Electronics

SHUNT, 0.100 WÜRTH ELEKTRONIK, 60900213421

61300821121

Wurth Electronics

HEADER, 2X4 0.100 CENTERS WÜRTH ELEKTRONIK, 61300821121

06033C104KAT

AVX

1 12 C1, C3, C6, C13-C21 CAP, 0603 0.1μF 10% 25V X7R AVX 06033C104KAT

X7R

AVX

1 12 C1, C3, C6, C13-C21 CAP, 0603 0.1μF 10% 25V X7R AVX 06033C104KAT

LT1019CS8-2.5#PBF

Linear Technology

IC, VOLTAGE REG 2.5V LINEAR TECH. LT1019CS8-2.5#PBF

LT1236CCS8-5#PBF

Linear Technology

IC, VOLTAGE REG 5V LINEAR TECH. LT1236CCS8-5#PBF

LTC2642ACDD-16

Linear Technology

IC, LTC2642ACDD-16 LINEAR TECH. LTC2642ACDD-16

LTC6078ACMS8

Linear Technology

IC, LTC6078ACMS8 LINEAR TECH LTC6078ACMS8

CRCW0603000Z0EA

Vishay

RES, 0603 0Ω JUMPER VISHAY CRCW0603000Z0EA

CRCW0603000Z0EA

Vishay

14 3 R7, R8, R9 RES, 0603 0Ω JUMPER VISHAY CRCW0603000Z0EA

NP0

AVX

5 1 C11 CAP, 0402 33pF 10% 50V NP0 AVX, 04025A330KAT2A

2mm

Molex

10 1 J1 HEADER, 2X7 2mm MOLEX 87831-1420

X5R

TDK

4 2 C10, C9 CAP, 0603 4.7μF 20% 6.3V X5R TDK C1608X5R0J475M080AB

X5R

TDK

2 2 C4, C5 CAP, 0805 10μF 20% 10V X5R TDK C2012X5R1A106M125AB

X7R

TDK

3 1 C8 CAP, 0402 0.1μF 20% 16V X7R TDK C1005X7R1C104M050BC

1/16W

Vishay

11 1 R1 RES, 0402 10k 5% 1/16W VISHAY CRCW040210K0JNED

1/16W

Vishay

13 3 R4, R5, R6 RES, 0402 4.99k 1% 1/16W VISHAY CRCW04024K99FKED