AD1837 Analog Devices, AD1837 Datasheet - Page 9

• Manufacturer Part Number: AD1837
• Description: 2 ADC, 8DAC 96 Khz, 24-Bit Sigma Delta Codec
• Manufacturer: Analog Devices

(Continued from Page 1)
and a continuous-time voltage out analog section. Each DAC
has independent volume control and clickless mute functions.
The ADC comprises two 24-bit conversion channels with multibit
sigma-delta modulators and decimation filters.
The AD1837 also contains an on-chip reference with a nominal
value of 2.25 V.
The AD1837 contains a flexible serial interface that allows for
glueless connection to a variety of DSP chips, AES/EBU receiv-
Typical Performance Characteristics
REV. PrA
TPC 2. ADC High-Pass Filter Response, f
–100
–150
–50
–10
–15
–20
–25
–30
–5
0
5
0
0
0
TPC 1. ADC Composite Filter Response
5
FREQUENCY – Normalized to
5
FREQUENCY – Hz
PRELIMINARY TECHNICAL DATA
10
10
f
S
15
S
= 48 kHz
15
20
–9–
ers, and sample rate converters. The AD1837 can be configured
in Left-Justified, Right-Justified, I
modes. Control of the AD1837 is acheived by means of an SPI-
compatible serial port. While the AD1837 can be operated from
a single 5 V supply, it also features a separate supply pin for its
digital interface which allows the device to be interfaced to other
devices using 3.3 V power supplies.
The AD1837 is available in a 52-Lead MQFP package and is
specified for the industrial temperature range of –40ºC to +85ºC.
TPC 3. ADC Composite Filter Response (Pass Band
Section)
TPC 4. ADC High-Pass Filter Response, f
–100
–150
–50
–10
–15
–20
–25
–30
–5
0
5
0
0
0
0.5
5
FREQUENCY – Normalized to
FREQUENCY – Hz
1.0
10
2
S, or DSP-compatible serial
f
1.5
S
15
AD1837
S
= 96 kHz
2.0
20