AD1865P Analog Devices Inc, AD1865P Datasheet

AD1865P

Manufacturer Part Number

AD1865P

Description

IC DAC AUDIO DUAL 18BIT 28PLCC

Manufacturer

Analog Devices Inc

Datasheet

1.AD1865N-J.pdf (12 pages)

Specifications of AD1865P

Rohs Status

RoHS non-compliant

Number Of Bits

Data Interface

Serial

Number Of Converters

Voltage Supply Source

Analog and Digital, Dual ±

Power Dissipation (max)

260mW

Operating Temperature

-25°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

28-LCC (J-Lead)

Settling Time

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD1865P

Manufacturer:

ADI/亚德诺

Quantity:

20 000

Current page: 1 of 12
Download datasheet (139Kb)

PRODUCT DESCRIPTION

The AD1865 is a complete, dual 18-bit DAC offering excellent

THD+N and SNR while requiring no external components. Two

complete signal channels are included. This results in cophased

voltage or current output signals and eliminates the need for

output demultiplexing circuitry. The monolithic AD1865 chip

includes CMOS logic elements, bipolar and MOS linear ele-

ments and laser-trimmed thin-film resistor elements, all fabri-

cated on Analog Devices’ ABCMOS process.

The DACs on the AD1865 chip employ a partially segmented

architecture. The first four MSBs of each DAC are segmented

into 15 elements. The 14 LSBs are produced using standard R-2R

techniques. Segment and R-2R resistors are laser trimmed to pro-

vide extremely low total harmonic distortion. This architecture

minimizes errors at major code transitions resulting in low out-

put glitch and eliminating the need for an external deglitcher.

When used in the current output mode, the AD1865 provides

two 1 mA output signals.

Each channel is equipped with a high performance output am-

plifier. These amplifiers achieve fast settling and high slew rate,

producing 3 V signals at load currents up to 8 mA. Each out-

put amplifier is short-circuit protected and can withstand indefi-

nite short circuits to ground.

The AD1865 was designed to balance two sets of opposing re-

quirements, channel separation and DAC matching. High chan-

nel separation is the result of careful layout. At the same time,

both channels of the AD1865 have been designed to ensure

matched gain and linearity as well as tracking over time and

temperature. This assures optimum performance when used in

stereo and multi-DAC per channel applications.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Dual Serial Input, Voltage Output DACs

No External Components Required

110 dB SNR

0.003% THD+N

Operates at 16

Cophased Outputs

116 dB Channel Separation

Pin Compatible with AD1864

DIP or SOIC Packaging

APPLICATIONS

Multichannel Audio Applications

Compact Disc Players

Multivoice Keyboard Instruments

DAT Players and Recorders

Digital Mixing Consoles

Multimedia Workstations

5 Volt Operation

Oversampling per Channel

A versatile digital interface allows the AD1865 to be directly

connected to standard digital filter chips. This interface employs

five signals: Data Left (DL), Data Right (DR), Latch Left (LL),

Latch Right (LR) and Clock (CLK). DL and DR are the serial

input pins for the left and right DAC input registers. Input data

bits are clocked into the input register on the rising edge of

CLK. A low-going latch edge updates the respective DAC out-

put. For systems using only a single latch signal, LL and LR

may be connected together. For systems using only one DATA

signal, DR and DL may be connected together.

The AD1865 operates with 5 V power supplies. The digital

supply, V

–V

ground pins are also provided. The AD1865 typically dissipates

only 225 mW, with a maximum power dissipation of 260 mW.

The AD1865 is packaged in both a 24-pin plastic DIP and a

28-pin SOIC package. Operation is guaranteed over the temper-

ature range of –25 C to +70 C and over the voltage supply

range of 4.75 V to 5.25 V.

PRODUCT HIGHLIGHTS

11. The AD1865 is a complete dual 18-bit audio DAC.

12. 110 dB signal-to-noise ratio for low noise operation.

13. THD+N is typically 0.003%.

14. Interchannel gain and midscale matching.

15. Output voltages and currents are cophased.

16. Low glitch for improved sound quality.

17. Both channels are 100% tested at 16

18. Low Power—only 225 mW typ, 260 mW max.

19. Five-wire interface for individual DAC control.

10. 24-pin DIP or 28-pin SOIC packages available.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

, for reduced digital feedthrough. Separate analog and digital

AGND

TRIM

MSB

–V

CLK

OUT

, can be separated from the analog supplies, V

FUNCTIONAL BLOCK DIAGRAM

LATCH

18-BIT

REFERENCE

Complete Dual 18-Bit

(DIP Package)

NC = NO CONNECT

18-BIT

D/A

AD1865

18-BIT

D/A

REFERENCE

LATCH

18-BIT

AD1865

Audio DAC

Fax: 617/326-8703

TRIM

MSB

DGND

AGND

OUT

and

Related parts for AD1865P

AD1865P Summary of contents

Page 1

FEATURES Dual Serial Input, Voltage Output DACs No External Components Required 110 dB SNR 0.003% THD+N Operates at 16 Oversampling per Channel 5 Volt Operation Cophased Outputs 116 dB Channel Separation Pin Compatible with AD1864 DIP or SOIC Packaging ...

Page 2

AD1865–SPECIFICATIONS Parameter RESOLUTION DIGITAL INPUTS 0 Clock Input Frequency ACCURACY Gain Error Interchannel Gain Matching Midscale Error Interchannel Midscale Matching Gain ...

Page 3

ABSOLUTE MAXIMUM RATINGS DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ...

Page 4

AD1865 TOTAL HARMONIC DISTORTION + NOISE Total harmonic distortion plus noise (THD+N) is defined as the ratio of the square root of the sum of the squares of the am- plitudes of the harmonics and noise to the value of ...

Page 5

FREQUENCY – kHz Figure 1. THD+N (dB) vs. Frequency (kHz) 100 500 1000 1500 2000 LOAD RESISTANCE – Figure 4. THD+N (dB) vs. Load Resistance ( ...

Page 6

AD1865–Analog Circuit Consideration GROUNDING RECOMMENDATIONS The AD1865 has three ground pins, two labeled AGND and one labeled DGND. AGND, the analog ground pins, are the “high quality” ground references for the device. To minimize distortion and reduce crosstalk between channels, ...

Page 7

CURRENT OUTPUT MODE One or both channels of the AD1865 can be operated in current output mode. I can be used to directly drive an external OUT current-to-voltage (I-V) converter. The internal feedback resis- tor can still be ...

Page 8

AD1865 –5V ANALOG SUPPLY SM5813AP APT BCKO WCKO 5 24 DOL 23 6 DOR ...

Page 9

MULTICHANNEL DIGITAL KEYBOARD DESIGN Figure 11 illustrates how to cascade AD1865’s to add multiple voices to an electronic musical instrument. In this example, the data and clock signals are shared between all six DACs. As the data representing an output ...

Related keywords

ad1868
ad1866
ad1861
ad1865
ad1865r
ad1865n
AD1865P datasheet
AD1865P data sheet
AD1865P pdf datasheet
AD1865P component
AD1865P part
AD1865P distributor
AD1865P RoHS
AD1865P datasheet download

AD1865P Analog Devices Inc, AD1865P Datasheet

AD1865P

Specifications of AD1865P

Available stocks

Related parts for AD1865P

AD1865P Summary of contents

Page 1

Page 2

Page 3

Page 4

Page 5

Page 6

Page 7

Page 8

Page 9

Page 10

Page 11

Page 12

Related keywords