16-Channel, 12-/16-Bit nanoDAC+ with 2 ppm/°C Voltage

Reference Temperature Coefficient, SPI Interface

Data Sheet

AD5674/AD5674R/AD5679/AD5679R

Rev. B

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FEATURES

High performance

High relative accuracy (INL): ±4 LSB maximum at 16 bits

(AD5679/AD5679R)

TUE: ±0.14% of FSR maximum

Offset error: ±1.5 mV maximum

Gain error: ±0.06% of FSR maximum

Low drift, 2.5 V voltage reference temperature coefficient:

2 ppm/°C typical

40 mA short-circuit current

Wide operating ranges

−40°C to +125°C temperature range

2.7 V to 5.5 V power supply range

Simplified implementation

User selectable gain of 1 or 2 (GAIN pin)

1.8 V logic compatibility

50 MHz serial peripheral interface (SPI) with readback or

daisy chain

28-lead, 4 mm × 4 mm, RoHS compliant LFCSP

APPLICATIONS

Optical transceivers

Base station power amplifiers

Process control (programmable logic controller (PLC)

input/output cards)

Industrial automation

Data acquisition systems

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

GENERAL DESCRIPTION

The AD5674/AD5674R/AD5679/AD5679R are low power,

16-channel, 12-/16-bit, buffered voltage output, digital-to-

analog converters (DACs) that include a 2.5 V, 2 ppm/°C internal

reference (enabled by default), and a gain select pin, resulting

in a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The

devices operate from a single, 2.7 V to 5.5 V supply range and

are guaranteed monotonic by design. The AD5674/AD5674R/

AD5679/AD5679R are available in a 28-lead lead frame chip scale

package (LFCSP) and incorporate a power-on reset (POR) circuit

that ensures that the DAC outputs power up to and remains at

zero-scale or midscale until a valid write. The AD5674/AD5674R/

AD5679/AD5679R contain a power-down mode that reduces

the current consumption to 2 μA typical.

Table 1. Octal and 16-Channel nanoDAC+® Devices

No. of

Channels

Interface

Reference

16-Bit

12-Bit

8

SPI1

Internal

AD5676R

AD5672R

External

AD5676

Not

applicable

I2C

Internal

AD5675R

AD5671R

16

SPI

Internal

AD5679R

AD5674R

External

AD5679

AD5674

PRODUCT HIGHLIGHTS

1.

High channel density: 16 channels in 4 mm × 4 mm

LFCSP.

2.

High relative accuracy (integral nonlinearity (INL))

±4 LSB maximum.

3.

Low drift, 2.5 V, on-chip reference.

INPUT

REGISTER

SDO

SDI

GND

LDAC

SCLK

AD5679R/AD5679/AD5674R/AD5674

RESET

2.5V REF1

VOUT0

STRING

DAC 0

BUFFER

GAIN

POWER-DOWN

LOGIC

POWER-ON

RESET

VLOGIC

GAIN

×1/×2

VDD

VREF

SYNC

VOUT1

VOUT2

VOUT3

VOUT14

VOUT15

INPUT

REGISTER

INPUT

REGISTER

INPUT

REGISTER

INPUT

REGISTER

INPUT

REGISTER

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

STRING

DAC 1

STRING

DAC 2

STRING

DAC 3

STRING

DAC 14

STRING

DAC 15

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

1ONLY APPLICABLE TO AD5679R/AD5674R.