|
|
PDF AD1866 Data sheet ( Hoja de datos )
| Número de pieza | AD1866 | |
| Descripción | Single Supply Dual 16-Bit Audio DAC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD1866 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
a
FEATURES
Dual Serial Input, Voltage Output DACs
Single +5 Volt Supply
0.005% THD+N
Low Power –50 mW
115 dB Channel Separation
Operates at 8؋ Oversampling
16-Pin Plastic DIP or SOIC Package
APPLICATIONS
Multimedia Workstations
PC Audio Add-In Boards
Portable CD and DAT Players
Automotive CD and DAT Players
Noise Cancellation
Single Supply
Dual 16-Bit Audio DAC
AD1866*
FUNCTIONAL BLOCK DIAGRAM
VL 1
LL 2
DL 3
CLK 4
DR 5
LR 6
DGND 7
VBR 8
16-BIT
DAC
16-BIT
SERIAL
REGISTER
16-BIT
SERIAL
REGISTER
16-BIT
DAC
AD1866
16 VBL
15 VS
14 VOL
VREF
13 NRL
12 AGND
VREF
11 NRR
10 VOR
9 VS
PRODUCT DESCRIPTION
The AD1866 is a complete dual 16-bit DAC offering excellent
performance while requiring a single +5 V power supply. It is
fabricated on Analog Devices’ ABCMOS wafer fabrication
process. The monolithic chip includes CMOS logic elements,
bipolar and MOS linear elements and laser trimmed, thin-
film resistor elements. Careful design and layout techniques
have resulted in low distortion, low noise, high channel separa-
tion and low power dissipation.
The DACs on the AD1866 chip employ a partially segmented
architecture. The first three MSBs of each DAC are segmented
into 7 elements. The 13 LSBs are produced using standard
R-2R techniques. The segments and R-2R resistors are laser
trimmed to provide extremely low total harmonic distortion.
The AD1866 requires no deglitcher or trimming circuitry.
Each DAC is equipped with a high performance output ampli-
fier. These amplifiers achieve fast settling and high slew rate,
producing ± 1 V signals at load currents up to ± 1 mA. The buff-
ered output signal range is 1.5 V to 3.5 V. The 2.5 V reference
voltages eliminate the need for “false ground” networks.
A versatile digital interface allows the AD1866 to be directly
connected to all digital filter chips. Fast CMOS logic elements
allow for an input clock rate of up to 16 MHz. This allows for
operation at 2×, 4×, 8×, or 16× the sampling frequency (where
FS = 44.1 kHz) for each channel. The digital input pins of the
AD1866 are TTL and +5 V CMOS compatible.
The AD1866 operates on +5 V power supplies. The digital
supply, VL, can be separated from the analog supply, VS, for re-
duced digital feedthrough. Separate analog and digital ground
pins are also provided. In systems employing a single +5 volt
power supply, VL and VS should be connected together. In bat-
tery operated systems, operation will continue even with re-
duced supply voltage. Typically, the AD1866 dissipates 50 mW.
The AD1866 is packaged in either a 16-pin plastic DIP or a
16-pin plastic SOIC package. Operation is guaranteed over the
temperature range of –35°C to +85°C and over the voltage
supply range of 4.75 V to 5.25 V.
PRODUCT HIGHLIGHTS
1. Single supply operation @ +5 V.
2. 50 mW power dissipation.
3. THD+N is 0.005% (typical).
4. Signal-to-Noise Ratio is 95 dB (typical).
5. 115 dB channel separation (typical).
6. Compatible with all digital filter chips.
7. 16-pin DIP and 16-pin SOIC packages.
8. No deglitcher required.
9. No external adjustments required.
*Protected by U.S. Patent Nos: 3,961,326; 4,141,004; 4,349,811; 4,857,862;
and patents pending.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
1 page  
Definition of Specifications–AD1866
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 amplitude of the fun-
damental input frequency. It is usually expressed in percent (%)
or decibels (dB).
D-RANGE DISTORTION (EIAJ SPECIFICATION)
D-Range distortion is the ratio of the amplitude of the signal at
an amplitude of –60 dB to the amplitude of the distortion plus
noise. In this case, an A-weight filter is used. The value speci-
fied for D-range performance is the ratio measured plus 60 dB.
SIGNAL-TO-NOISE RATIO
The signal-to-noise ratio is defined as the ratio of the amplitude
of the output when a full-scale output is present to the ampli-
tude of the output with no signal present. It is expressed in
decibels (dB) and measured using an A-weight filter.
GAIN LINEARITY
Gain linearity is a measure of the deviation of the actual output
amplitude from the ideal output amplitude. It is determined by
measuring the amplitude of the output signal as the amplitude
of that output signal is digitally reduced to a lower level. A per-
fect D/A converter exhibits no difference between the ideal and
actual amplitudes. Gain linearity is expressed in decibels (dB).
MIDSCALE ERROR
Midscale error, or bipolar zero error, is the deviation of the ac-
tual analog output from a voltage at the bias pin when the twos
complement input code representing midscale is loaded in the
DAC. Midscale error is expressed in mV.
FUNCTIONAL DESCRIPTION
The AD1866 is a complete, monolithic dual 16-bit digital audio
DAC which runs off a single +5 volt supply. As shown in the
block diagram, each channel contains a voltage reference, a
16-bit serial-to-parallel input register, a 16-bit input latch, a
16-bit DAC, and an output amplifier.
The voltage reference section provides a reference voltage and a
false ground voltage for each channel. The low noise bandgap
circuits produce reference voltages that are unaffected by
changes in temperature, time, and power supply.
The input registers are fabricated with CMOS logic gates.
These gates allow high switching speeds and low power con-
sumption, contributing to the fast digital timing, the low glitch
and low power dissipation of the AD1866.
VL 1
LL 2
DL 3
CLK 4
DR 5
LR 6
DGND 7
VBR 8
16-BIT
DAC
16-BIT
SERIAL
REGISTER
16-BIT
SERIAL
REGISTER
16-BIT
DAC
AD1866
16 VBL
VREF
15 VS
14 VOL
13 NRL
12 AGND
VREF
11 NRR
10 VOR
9 VS
AD1866 Functional Block Diagram
The 16-bit DAC uses a combination of segmentation and R-2R
architecture to achieve good integral and differential linearity.
The resistors which form the ladder structure are fabricated
with silicon-chromium thin film. Laser trimming of these resis-
tors further reduces linearity error, resulting in low output
distortion.
The output amplifier uses both MOS and bipolar devices and
incorporates an NPN class A output stage. It is designed to pro-
duce high slew rate, low noise, low distortion, and optimal fre-
quency response.
REV. 0
–5–
5 Page 
+5V POWER
SUPPLY
YM3434
1 16
2
3
4 VDD 2
5
16/18 15
ST 14
VSS 13
BCO 12
6
7
8 VDD1
WCO 11
DRO 10
DLO 9
AD1866
1 VL
VBL 16
2 LL
VS 15
3 DL
VOL 14
4 CLK NRL 13
5 DR AGND 12
6 LR
NRR 11
7 DGND VOR 10
8 VBR
VS 9
Applications–AD1866
LOW-
PASS
FILTER
LEFT
CHANNEL
OUTPUT
LOW-
PASS
FILTER
RIGHT
CHANNEL
OUTPUT
Figure 14. AD1866 with Yamaha YM3434 Digital Filter
+5V POWER
SUPPLY
DI
1 N 18
2 17
3 SM5840A/B 16
BCKO
4
BCBKCOK 15
O
5 VSS
VVDDDD 14
6 OW20
7
8
9
WCWKCOK 13
O
DDOOL 12
L
DDOOR 11
R
1100
D
G
AD1866
1 VL
VBL 16
2 LL
VS 15
3 DL
VOL 14
4 CLK NRL 13
5 DR AGND 12
6 LR
NRR 11
7 DGND VOR 10
8 VBR
VS 9
LOW-
PASS
FILTER
LEFT
CHANNEL
OUTPUT
LOW-
PASS
FILTER
RIGHT
CHANNEL
OUTPUT
Figure 15. AD1866 with NPC SM5840C Digital Filter
REV. 0
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD1866.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD1860 | 18-Bit PCM Audio DAC | Analog Devices |
| AD1861 | 16-Bit/18-Bit/ 16 X Fs PCM Audio DACs | Analog Devices |
| AD1862 | Ultralow Noise 20-Bit Audio DAC | Analog Devices |
| AD1864 | Complete Dual 18-Bit Audio DAC | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |