MAX5556ESA+T Maxim Integrated Products, MAX5556ESA+T Datasheet - Page 7

• Manufacturer Part Number: MAX5556ESA+T
• Description: IC DAC STEREO AUDIO 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX5556ESA+T

• Number Of Bits: 16
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Settling Time: -

The MAX5556–MAX5559 stereo audio sigma-delta DACs
offer a complete stereo digital-to-analog system for con-
sumer audio applications. The MAX5556–MAX5559 fea-
ture built-in digital interpolation/filtering, sigma-delta
digital-to-analog conversion and analog output filters
(Figure 2). Control logic and mute circuitry minimize
audible pops and clicks during power-up, power-down,
and whenever invalid clock conditions occur.
These stereo audio DACs receive input data over a 3-
wire interface that supports up to 24 bits of left-justified,
right-justified, or I
MAX5556 accepts left-justified I
The MAX5557 accepts left-justified data, up to 24 bits.
The MAX5558 accepts right-justified 16-bit data. The
MAX5559 accepts right-justified 18-bit data. These
DACs also support a wide range of sample rates from
2kHz to 48kHz. Direct analog output data is routed to
the right or left output by driving LRCLK high or low.
See the Clock and Data Interface section.
The MAX5556–MAX5559 support MCLK/LRCLK ratios
of 256, 384, or 512. These devices allow a change to
the clock speed ratio without causing glitches on the
analog outputs by internally muting the audio during
invalid clock conditions. The internal mute function
ramps down the audio amplitude and forces the analog
PIN
1
2
3
4
5
6
7
8
SDATA
LRCLK
NAME
MCLK
OUTR
OUTL
SCLK
GND
V
_______________________________________________________________________________________
DD
2
S-compatible audio data. The
Detailed Description
Serial Audio Data Input. Data is clocked into the MAX5556–MAX5559 on the rising edge of the
internal or external SCLK. Data is input in two’s complement format, MSB first. The state of LRCLK
determines whether data is directed to OUTL or OUTR.
External Serial Clock Input. Data is strobed on the rising edge of SCLK.
Left-/Right-Channel Select Clock. For the MAX5556, drive LRCLK low to direct data to OUTL or
LRCLK high to direct data to OUTR. For the MAX5557/MAX5558/MAX5559, drive LRCLK high to
direct data to OUTL or LRCLK low to direct data to OUTR.
Master Clock Input. The MCLK/LRCLK ratio must equal to 256, 384, or 512.
Right-Channel Analog Output
Ground
Power-Supply Input. Bypass V
close to V
Left-Channel Analog Output
2
S data, up to 24 bits.
DD
as possible. Place the 0.1µF capacitor closest to V
Low-Cost Stereo Audio DACs
DD
to GND with a 0.1µF capacitor in parallel with a 4.7µF capacitor as
outputs to a 2.4V quiescent voltage immediately upon
clock loss or change of ratio. A soft-start routine is then
engaged when a valid clock ratio is re-established, pro-
ducing clickless and popless continuous operation.
The MAX5556–MAX5559 operate from a +4.75V to
+5.5V analog supply and feature +87dB dynamic
range with total harmonic distortion typically below
-87dB.
The digital interpolation filter eliminates images of the
baseband audio signal that exist at multiples of the input
sample rate (f
spectrum has images of the input signal at multiples of 8
x f
upsampling images up to 64 x f
mately removed through the internal analog lowpass filter
and the external analog output filter.
The MAX5556–MAX5559 use a multibit sigma-delta DAC
with an oversampling ratio (OSR) of 64 to achieve a wide
dynamic range. The sigma-delta modulator accepts a 3-
bit data stream from the interpolation filter at a rate of 64
x f
age representation of that data stream.
S
S
. An additional upsampling sinc filter further reduces
(f
S
FUNCTION
= LRCLK frequency) and provides an analog volt-
S
). The resulting upsampled frequency
Sigma-Delta Modulator/DAC
DD.
Pin Description
S
. These images are ulti-
Interpolator
7