CS3302A-ISZ Cirrus Logic Inc, CS3302A-ISZ Datasheet - Page 10

• Manufacturer Part Number: CS3302A-ISZ
• Description: Hydrophone Instrumentation Amp
• Manufacturer: Cirrus Logic Inc

Specifications of CS3302A-ISZ

• Amplifier Type: Programmable Gain
• Number Of Circuits: 2
• Output Type: Differential
• Current - Input Bias: 1pA
• Voltage - Input Offset: 250µV
• Current - Supply: 5mA
• Current - Output / Channel: 25mA
• Voltage - Supply, Single/dual (±): ±2.45V ~ 2.55V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1778 - EVALUATION BOARD FOR CS5376
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

10
2.
The CS3302A is a high-impedance, low-noise
CMOS differential input, differential output ampli-
fier for precision analog signals between DC and
2 kHz. It has multiplexed inputs, rough/fine charge
outputs, and programmable gains of x1, x2, x4, x8,
x16, x32, and x64.
The performance of this amplifier makes it ideal
for low-frequency, high-dynamic-range applica-
tions requiring low distortion and minimal power
consumption. It is optimized for use in acquisition
systems designed around the CS5371A/72A sin-
gle/dual ∆Σ modulators and the CS5376A quad
digital filter or the CS5373A ∆Σ modulator and
CS5378 digital filter.
level architecture of a 4-channel acquisition system
using four CS3302A, two CS5372A, one
CS4373A, and one CS5376A.
Hydrophone
Hydrophone
Hydrophone
Hydrophone
Geophone
Geophone
Geophone
Geophone
Sensor
Sensor
Sensor
Sensor
GENERAL DESCRIPTION
or
or
or
or
Figure 3
M
U
X
M
U
X
Figure 4
M
U
X
M
U
X
shows the system-
AMP
AMP
AMP
AMP
Figure 3. System Architecture
shows the
CS3301A
CS3302A
CS3301A
CS3302A
CS3301A
CS3302A
CS3301A
CS3302A
Switch
Switch
MUX
MUX
DS765PP1
CS3302A
Modulator
Modulator
CS5371A
CS5372A
CS5371A
CS5372A
system architecture of a single channel acquisition
system using a CS3302A, CS5373A, and CS5378.
2.1
2.1.1
The amplifier analog inputs are designed for high-
impedance differential sensors. Input multiplexing
simplifies system connections by providing sepa-
rate inputs for a sensor and test DAC (INA, INB) as
well as an internal termination for noise tests. The
MUX0, MUX1 digital pins determine which multi-
plexed input is connected to the amplifier.
2.1.2
The amplifier analog outputs are separated into rough
charge / fine charge signals to easily connect to the
CS5371A/72A/73A inputs. Each differential output
∆Σ
∆Σ
Analog Signals
Analog Inputs
Analog Outputs
CS5376A
Digital Filter
CS4373A
Test
DAC
System Telemetry
Communication
Configuration
µController
EEPROM
Interface
CS3302A
or
DS765PP1