DAC1003D160HW datasheet(6/18 Pages) IDT

部品番号	DAC1003D160HW

部品情報	Dual 10 bits DAC, up to 160 MHz, 2 x interpolation

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メーカー	IDT [Integrated Device Technology]

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DAC1003D160_3

Product data sheet

Rev. 03 — 2 July 2012

6 of 18

Integrated Device Technology

DAC1003D160

Dual 10 bits DAC, up to 160 MHz, 2 x interpolation

7. Functional description

The DAC1003D160 is a segmented architecture composed of a 7-bit thermometer

sub-DAC and the remaining 3-bit in a binary weighted sub-DAC.

The device produces two complementary current outputs on both channels, respectively

pins IOUT/IOUTN and QOUT/QOUTN which need to be connected via a load resistor to

the ground.

Figure 3 shows the equivalent analog output circuit of one DAC, which consists of a

parallel combination of PMOS current sources and associated switches for each segment.

The cascade source configuration enables the increase of the output impedance of the

source and the improvement of the dynamic performance of the DAC by introducing less

distortion.

Figure 4 shows the internal reference configuration. In this case the bias current is given

by the output of the internal regulator connected to the inverting input of the internal

operational amplifiers, while external resistors RI and RQ are connected respectively to

pins IVIRES and QVIRES. Thus the output current of the two DACs is typically fixed to

20 mA with an appropriate choice of these resistors. This configuration is optimal for

temperature drift compensation because the band gap can be matched with the voltage

on the feedback resistors.

The relation between full-scale output current IO(fs) and the RI (RQ) is:

RI

2048 VGAPOUT



82 IOFS





-----------------------------------------

=

The output current can also be adjusted by imposing an external reference voltage to the

inverting input pin GAPOUT and disabling the internal band gap with pin GAPD set to

HIGH. At a voltage lower than 1.2 V the current can be set at values lower than 20 mA.

The input references at pins IVIRES and QVIRES may also be driven by separate

reference voltages to adjust independently the two DAC currents.

014aaa537

AGND

RL

AGND

IOUT/QOUT

IOUTN/QOUTN

DAC1003D160

014aaa538

QVIRES

IVIRES

GAPOUT

AGND

GAPD

INTERNAL

BAND GAP

I DAC current

sources array

DAC1003D160

Q DAC current

sources array

RI

RQ

Fig 3. Equivalent analog output circuit

Fig 4. Internal reference configuration

同様の部品番号 - DAC1003D160HW

メーカー	部品番号	データシート	部品情報
NXP Semiconductors	DAC1003D160HW	120Kb / 19P	Dual 10 bits DAC, up to 160 MHz, 2 x interpolation Rev. 02-13 August 2008
Renesas Technology Corp	DAC1003D160HW	437Kb / 18P	Dual 10 bits DAC, up to 160 MHz, 2 x interpolation 2 July 2012

More results

同様の説明 - DAC1003D160HW

メーカー	部品番号	データシート	部品情報
NXP Semiconductors	DAC1003D160	120Kb / 19P	Dual 10 bits DAC, up to 160 MHz, 2 x interpolation Rev. 02-13 August 2008
Renesas Technology Corp	DAC1003D160	437Kb / 18P	Dual 10 bits DAC, up to 160 MHz, 2 x interpolation 2 July 2012
NXP Semiconductors	DAC1203D160	120Kb / 19P	Dual 12 bits DAC, up to 160 MHz, 2 x interpolating Rev. 02-14 August 2008
Renesas Technology Corp	DAC1403D160	442Kb / 18P	Dual 14 bits DAC, up to 160 MHz, 2 x interpolating 2 July 2012
Integrated Device Techn...	DAC1203D160	434Kb / 18P	Dual 12 bits DAC, up to 160 MHz, 2 x interpolating
Integrated Device Techn...	DAC1403D160	439Kb / 18P	Dual 14 bits DAC, up to 160 MHz, 2 x interpolating
NXP Semiconductors	DAC1403D160	120Kb / 19P	Dual 14 bits DAC, up to 160 MHz, 2 x interpolating Rev. 02-14 August 2008
Renesas Technology Corp	DAC1203D160	438Kb / 18P	Dual 12 bits DAC, up to 160 MHz, 2 x interpolating 2 July 2012
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