CS4373A-ISZ Cirrus Logic Inc, CS4373A-ISZ Datasheet - Page 24

• Manufacturer Part Number: CS4373A-ISZ
• Description: IC,D/A CONVERTER,SINGLE,24-BIT,SSOP,28PIN
• Manufacturer: Cirrus Logic Inc

Specifications of CS4373A-ISZ

• Rohs Compliant: YES
• Number Of Bits: 24
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital, Dual ±
• Power Dissipation (max): 10mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1778 - EVALUATION BOARD FOR CS5376
• Data Interface: -
• Settling Time: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1646

7. ANALOG OUTPUTS
The CS4373A has multiple differential analog
outputs. The best possible analog perfor-
mance is achieved from the precision outputs
(OUT±), but with only minimal drive capability.
A buffered output (BUF±) can drive an external
load, but with reduced analog performance.
The internal anti-alias filter requires a dedicat-
ed capacitor connection (CAP±) to eliminate
undesired high-frequency signals.
7.1 Differential Signals
Differential AC signals out of the CS4373A
consist of two halves with equal but opposite
magnitude varying about a common mode
voltage. A full-scale 5 V
nal centered on a -0.15 V common mode volt-
age will have:
For the opposite case:
So the total swing for SIG+ relative to SIG- is
(+2.5 V) - (-2.5 V) = 5 V
calculation can be done for SIG- relative to
SIG+. It’s important to note that a 5 V
ential signal centered on a -0.15 V common
24
SIG+ = -0.15 V + 1.25 V = +1.1 V
SIG- = -0.15 V - 1.25 V = -1.4 V
SIG+ is +2.5 V relative to SIG-
SIG+ = -0.15 V - 1.25 V = -1.4 V
SIG- = -0.15 V + 1.25 V = +1.1 V
SIG+ is -2.5 V relative to SIG-
pp
PP
SENSOR
ELECTRONICS
CH1 BUF
CH1,2,3,4 OUT
CH2 BUF
differential. A similar
VA+
CH3 BUF
VA-
CH4 BUF
differential AC sig-
VREF
2.5 V
Figure 12. Analog Outputs
Switches
CONTROL
Analog
pp
SWITCH
10 Ω
100µF
differ-
+
Route VREF as diff pair
Route OUT as diff pair
Route BUF as diff pair
VA+
VA-
10nF
C0G
mode voltage never exceeds +1.1 V with re-
spect to ground and never drops below -1.4 V
with respect to ground on either half. By defini-
tion, differential voltages are measured with
respect to the opposite half, not relative to
ground. A voltmeter differentially measuring
between SIG+ and SIG- in the above example
would read 1.767 V
7.2 Analog Output Attenuation
The CS4373A has seven analog output atten-
uation settings from 1/1 to 1/64 selected with
the ATT2, ATT1, and ATT0 pins. At 1/64 atten-
uation in AC Common Mode (MODE 6) there
is no output signal amplitude due to the atten-
uator architecture.
Selection ATT[2:0]
0.1µF
0.1µF
CAP+
CAP-
BUF+
BUF-
OUT+
OUT-
VREF+
VREF-
0
1
2
3
4
5
6
7
VA-
VA-
CS4373A
Table 3. Output Attenuation Settings
DGND
MSYNC
MODE0
MODE1
MODE2
VD
TDATA
MCLK
ATT0
ATT1
ATT2
0.1µF
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
MCLK
MSYNC
TBSDATA
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
CS5376A
SIGNALS
VD
rms
Attenuation
, or 5 V
reserved
1/16
1/32
1/64
1/1
1/2
1/4
1/8
pp
.
CS4373A
-12.04 dB
-18.06 dB
-24.08 dB
-30.10 dB
-36.12 dB
reserved
-6.02 dB
0 dB
dB
DS699F2