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Analog Devices Semiconductor Electronic Components Datasheet



AD1936

(AD1935 - AD1939) 4 ADC/8 DAC


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Preliminary Technical Data
4 ADC/8 DAC with PLL,
192 kHz, 24 Bit CODEC
AD1935/AD1936/AD1937/AD1938/AD1939
Features
PLL generated (32-192kHz) or direct master clock
Low EMI design
109 dB DAC/ 107dB ADC Dynamic Range and SNR
-94dB THD+N
Single 3.3V Supply
Tolerance for 5V logic inputs
Supports 24-bits and 8 kHz - 192 kHz sample rates
Differential ADC input
Single-ended or Differential DAC output versions
Log volume control with "auto-ramp" function
Hardware and software controllable clickless mute
Software and hardware power-down
Right justified, left justified, I2S and TDM Modes
Master and slave modes up to 16 channel in/out
48-lead LQFP or 64-lead LQFP plastic package
Applications
Automotive audio systems
Home theater systems
Set-top boxes
Digital audio effects processors
GENERAL DESCRIPTION
The AD193X family are high performance, single-chip codecs that
provide 4 ADCs with differential input and 8 DACs with either
single-ended or differential output using ADI’s patented multibit
sigma-delta architecture. An SPI® or I2C® port is included, allowing
a microcontroller to adjust volume and many other parameters.
The AD193X family operates from 3.3V digital and analog supplies.
The AD193X is available in a 48-lead (SE output) or 64-lead
(differential output) LQFP package.
The AD193X is designed for low EMI. This consideration is
apparent in both the system and circuit design architectures. By
using the on-board PLL to derive master clock from L-R clock, the
AD193X eliminates the need for a separate high frequency master
clock. It can also be used with a suppressed bit clock. The D-A and
A-D converters are designed using the latest ADI continuous time
architectures to further minimize EMI. By using 3.3V supplies,
power consumption is minimized, further reducing emissions.
Functional Block Diagram
Digital Audio
Input/Output
Analog
Audio
Inputs
AD193X
Serial Data Port
ADC
SDATAOUT
SDATAIN Digital
Digital
Filter
ADC Filter
&
ADC
CLOCKS
Volume
Control
ADC Timing Management
&
Control
(Clock & PLL)
Precision
Voltage
Reference
Control Port
SPI / I2C
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
Analog
Audio
Outputs
Control Data
Input/Output
Figure 1
Rev. PrI
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.



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AD1936 pdf
AD1935/AD1936/AD1937/AD1938/AD1939
Preliminary Technical Data
AD193X—SPECIFICATIONS
Test Conditions, Unless Otherwise Noted.
Performance of all channels is identical (exclusive of the Inter-channel Gain Mismatch and Inter-channel Phase Deviation specifications).
Parameter
Supply Voltages (AVDD, DVDD)
Case Temperature
Master Clock
Input Signal
Input Sample Rate
Measurement Bandwidth
Word Width
Load Capacitance (Digital Output)
Load Current (Digital Output)
Input Voltage HI
Input Voltage LO
Rating
3.3 V
25°C
12.288 MHz (48 kHz fS, 256 × fS Mode)
1.000 kHz, 0 dBFS (Full Scale), -1 dBVrms (0.9Vrms)
48 kHz
20 Hz to 20 kHz
24 Bits
50 pF
±1 mA or 1.5kto ½ DVDD supply
2.0 V
0.8 V
Table 1
Analog Performance
Parameter
ANALOG-TO-DIGITAL CONVERTERS
DIGITAL-TO-ANALOG CONVERTERS
ADC Resolution (all ADCs)
Dynamic Range (20 Hz to 20 kHz, –60 dB Input)1
No Filter (RMS)
With A-Weighted Filter (RMS)
With A-Weighted Filter (Avg)
Total Harmonic Distortion + Noise (–1 dBFS)1
Full-Scale Input Voltage (Differential)
Gain Error
Interchannel Gain Mismatch
Offset Error
Gain Drift
Interchannel Isolation
CMRR, 100 mV RMS, 1 kHz
CMRR, 100 mV RMS, 20 kHz
Input Resistance
Input Capacitance
Input Common-Mode Bias Voltage
Dynamic Range (20 Hz to 20 kHz, –60 dB Input)1
No Filter (RMS), Single-ended version
With A-Weighted Filter (RMS), Single-ended version
With A-Weighted Filter (Avg), Single-ended version
No Filter (RMS), Differential version
With A-Weighted Filter (RMS), Differential version
With A-Weighted Filter (Avg), Differential version
Total Harmonic Distortion + Noise (0 dBFS)1
Single-ended version
Differential version
Full-Scale Output Voltage (Single-ended version)
Full-Scale Output Voltage (Differential version)
Gain Error
Min Typ
24
102
105
107
–92
1.9
–5.0
–0.1
–10 0
100
–110
70
70
14
10
1.5
101
104
106
104
107
109
–92
–94
0.9 (2.5)
1.8 (5.0)
-6% TBD
Max Unit
Bits
dB
dB
dB
dB
V rms
+5.0 %
+0.1 dB
+10 mV
ppm/°C
dB
dB
dB
k
pF
V
dB
dB
dB
dB
dB
dB
dB
dB
V rms (V pp)
V rms (V pp)
+6% %
1 Total harmonic distortion + noise and dynamic range typical specifications are for two channels active, max/min are all channels active.
Rev. PrI | Page 2 of 30



Part Number AD1936
Description (AD1935 - AD1939) 4 ADC/8 DAC
Maker Analog Devices - Analog Devices
Total Page 30 Pages
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