Overview

The ISL71148M is a radiation tolerant 8-channel high precision 14-bit, 900/480ksps SAR analog-to-digital converter (ADC). The ADC core is preceded by eight fully differential analog input channels, a buffered 8-to-1 multiplexer, and a programmable gain amplifier (PGA). The device features a peak SNR of 83.2dBFS when operating at 900ksps. With the PGA enabled, sampling rates up to 480ksps are supported. The PGA can be bypassed to increase the sample rate to 900ksps.

The product features 900/480ksps throughput with no data latency, excellent linearity, and dynamic accuracy. The ISL71148M offers a high-speed SPI-compatible serial interface that supports logic ranging from 2.2V to 3.6V using a separate digital I/O supply pin. The device is available in a 48-lead thin quad flat-pack (TQFP) space plastic.

The ISL71148M offers a separate low-power mode (LPM) pin that reduces power dissipation at lower sample rates. An external reference with a supported input range of 2.4V to 2.6V determines the analog input signal range.

ISL71148M Functional Block Diagram
ISL71148M Functional Block Diagram
  • Qualified to Renesas Rad Tolerant Screening and QCI Flow (Technical Brief)
  • 8 buffered differential analog input channels with multiplexer
  • Bypassable PGA with selectable gain (1 ≤ G ≤ 16)
  • Fully differential bipolar operation
  • Channel scan sequencer
  • Full throughput rate with no data latency
  • Excellent linearity: ±0.2 LSB DNL, ±0.4 LSB INL
  • Low noise: 83.2dBFS (PGA bypassed), 77dBFS SNR (PGA Gain = 2)
  • 5V AVCC supply and 2.5V/3.3V DVCC supply
  • Analog input impedance: >1GΩ, <5pF
  • Wide 50MHz -3dB input bandwidth
  • Low power mode operation at lower sample rates
  • High-speed SPI-compatible serial I/O
  • Full military temperature range operation TA = -55 °C to +125 °C
  • TID Radiation Lot Acceptance Testing (LDR: 0.01rad(Si)/s)
    • ISL71148M30NZ: 30krad(Si)
    • ISL71148M50NZ: 50krad(Si)
  • SEE Characterization
    • No DSEE for AVCC = 6.2V, DVCC = 4.6V, and VREF = 3.6V at 46MeV•cm2/mg
    • SEFI <3.1μm2 at 46MeV•cm2/mg

Applications

  • Precision signal processing
  • Propulsion, payload systems
  • High-end industrial
  • Engine control
  • Down-hole drilling

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL71148M Datasheet
PDF 2.17 MB
Technical Brief
R34TB0004: Renesas Radiation Tolerant Plastic Screening and QCI Flow
PDF 356 KB
Brochure
Intersil Space Products Brochure
PDF 4.85 MB
Application Note
Output Data Formats for Renesas Rad Hard Precision SAR ADCs
PDF 514 KB
Application Note
Transient SEE Test Method for Precision SAR ADCs
PDF 1.47 MB
White Paper
Wafer by Wafer Low Dose Rate Acceptance White Paper
PDF 533 KB
6 items

Design & Development

Boards & Kits

ISL71148MNZEV1Z Rad Tolerant SAR ADC Evaluation Board

ISL71148MNZEV1Z

Evaluation
Learn More

Rad Tolerant 8-Channel SAR ADC Evaluation Board

The ISL71148MNZEV1Z board evaluates the operation of the ISL71148M radiation tolerant 8-channel high precision 14-bit, 900ksps/480ksps SAR ADC. The evaluation board is...

Featured Documents:
ISL71148MNZEV1Z Evaluation Board Manual

ECAD Models

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Product Options

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    Pkg. Type
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    DLA SMD
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    Part Number
    ISL71148M30NZ
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    spa
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    		 TQFP Tray 25 NA Get Samples,
    ISL71148M50NZ
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    Samples Available
    		 TQFP Tray 25 NA Get Samples,
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