AD1849KPZ Analog Devices Inc, AD1849KPZ Datasheet - Page 25

• Manufacturer Part Number: AD1849KPZ
• Description: IC CODEC STEREO 5V 16BIT 44PLCC
• Manufacturer: Analog Devices Inc
• Type: Stereo Audior

Specifications of AD1849KPZ

• Data Interface: Serial
• Resolution (bits): 16 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 83 / 86
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CS4215 COMPATIBILITY
The Analog Devices AD1849K SoundPort Stereo Codec is pin-
compatible with the CS4215. These chips were independently
codeveloped to a common specification provided by Sun
Microsystems, Inc. Because of their independent development,
they will differ in performance and in minor details. A board can
be designed to accommodate either chip by attending to a few
differences in their required support circuitry.
• If consistent control information is transmitted to the Codec
• The Analog Devices AD1849K uses two external capacitors
• The AD1849K requires an external passive antialias filter as
during Control Mode, the AD1849K DCB handshake is
compatible with the CS4215. See text for more details.
to complete its internal input filter as shown in Figure 18.
The CS4215 calls the two pins on the AD1849K for these
capacitor connections, “no connects.” By laying out a board
with these capacitors, either chip will work.
shown in Figure 11. In contrast, the recommended input
circuit for the CS4215 is a single-pole active filter requiring a
dual op amp. Though overkill for the AD1849K, this input
circuit will work with the AD1849K as well.
• The AD1849K was designed to require no external low-pass
• While it is not required, it is strongly recommended that pin 38
• Analog Devices recommends a 10 µF bypass capacitor on the
filters on analog outputs. As shown in Figure 13, the AD1849K
only requires ac-coupling capacitors and resistors to line-level dc
bias. In contrast, the CS4215 has a single-pole passive filter for
its recommended line-level output circuit. Though overkill for
the AD1849K, this output circuit will work with the AD1849K
as well.
on the AD1849K be connected to the digital power supply
and pin 39 be connected to digital ground. As these pins are
“no connect” on the CS4215, either chip will work in this
configuration.
voltage reference output, CMOUT (Pin 19). Using a 0.47 µF
capacitor may be acceptable in many systems, however DAC
performance at low sample rates will be improved with the
larger capacitor.
AD1849K