CS3302-ISZ Cirrus Logic Inc, CS3302-ISZ Datasheet - Page 10

• Manufacturer Part Number: CS3302-ISZ
• Description: IC DIFF AMP PROG GAIN 24-SSOP
• Manufacturer: Cirrus Logic Inc

Specifications of CS3302-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 (±): 4.75 V ~ 5.25 V, ±2.38 V ~ 2.63 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• For Use With: 598-1778 - EVALUATION BOARD FOR CS5376
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -

2.
The CS3302 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 amplifier’s performance makes it ideal for
low-frequency, high-dynamic-range applications
requiring low distortion and minimal power con-
sumption. It’s optimized for use in acquisition sys-
tems designed around the CS5371/72 single/dual
∆Σ modulators and the CS5376A quad digital fil-
ter.
of a 4-channel acquisition system using four
CS3302, two CS5372, one CS4373A, and one
CS5376A.
10
Hydrophone
Hydrophone
Hydrophone
Hydrophone
Geophone
Geophone
Geophone
Geophone
Sensor
Sensor
Sensor
Sensor
Figure 3
GENERAL DESCRIPTION
or
or
or
or
shows the system-level architecture
M
U
X
M
U
X
M
U
X
M
U
X
AMP
AMP
AMP
AMP
Figure 3. System Architecture
CS3301
CS3302
CS3301
CS3302
CS3301
CS3302
CS3301
CS3302
Switch
Switch
MUX
MUX
M odulator
M odulator
CS5371
CS5372
CS5371
CS5372
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 CS5371/72 inputs. Each output also includes
a series resistor, requiring only two differential ca-
pacitors to create the CS5371/72 input anti-alias
filter.
∆Σ
∆Σ
Analog Signals
Analog Inputs
Analog Outputs
CS5376A
Digital Filter
CS4373A
DAC
Test
System Telemetry
Communication
Configuration
µController
EEPROM
Interface
CS3302
or
DS596F3