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Sonar ranging receiver

custom-reels CUSTOM Custom reel may be available


Qty Price (USD)
1-99 4.907
100-249 4.299
250-999 3.014
1,000+ 2.429

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information info-circle

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Export classification

  • US ECCN: EAR99

Packaging information

Package | Pins SOIC (D) | 16
Package qty | Carrier: 2,500 | LARGE T&R
Operating temperature range (°C)
View TI packaging information

Features for the TL852

  • Designed for Use With the TL851 in Sonar Ranging Modules Like the SN28827
  • Digitally Controlled Variable-Gain Variable-Bandwidth Amplifier
  • Operational Frequency Range of 20 kHz to 90 kHz
  • TTL-Compatible
  • Operates From Power Sources of 4.5 V to 6.8 V
  • Interfaces to Electrostatic or Piezoelectric Transducers
  • Overall Gain Adjustable With One External Resistor

Description for the TL852

The TL852 is an economical sonar ranging receiver integrated circuit for use with the TL851 control integrated circuit. A minimum of external components is required for operation, and this amplifier easily interfaces to Polaroid's 50-kHz electrostatic transducer. An external 68-k.

Digital control of amplifier gain is provided with gain control inputs GCA, GCB, GCC, and GCD. These inputs must be driven synchronously (all inputs stable within 0.1 us) to avoid false receive output signals due to invalid logic counts. This can be done easily with the TL851 control integrated circuit. A plot showing relative gain for the various gain steps versus time can be seen in Figure 2. To dampen ringing of the 50-kHz electrostatic transducer, a 5-k resistor from G1IN to XIN is recommended.

An external parallel combination of inductance and capacitance between LC and VCC provides an amplifier with an externally controlled gain and Q. This not only allows control of gain to compensate for attenuation of signal with distance, but also maximizes noise and sidelobe rejection. Care must be taken to accurately tune the L-C combination at operating frequency or gain and Q will be greatly reduced at higher gain steps.

AC coupling between stages of the amplifier is accomplished with a 0.01-mF capacitor for proper biasing.

The receive output is normally held at a low level by an internal 1-uA current source. When an input of sufficient amplitude is received, the output is driven alternately by the 1-uA discharge current and a 50-uA charging current. A 1000-pF capacitor is required from REC to GND to integrate the received signal so that one or two noise pulses will not be recognized.

XIN provides clamping for the transformer secondary when used for transducer transmit drive as shown in Figure 4 of the SN28827 data sheet.

The TL852 is characterized for operation from 0°C to 40°C.



Qty Price (USD)
1-99 4.907
100-249 4.299
250-999 3.014
1,000+ 2.429

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships  tube or tray  devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

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Lot and date code selection may be available

Add a quantity to your cart and begin the checkout process to view the options available to select lot or date codes from existing inventory.

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