AD7938
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AD7938

8-Channel, 1.5 MSPS, 12-Bit Parallel ADCs with a Sequencer

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $12.11
Features
  • Throughput rate: 1.5 MSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • 8 analog input channels with a sequencer
  • Software-configurable analog inputs
    • 8-channel single-ended inputs
    • 4-channel fully differential inputs
    • 4-channel pseudo differential inputs
    • 7-channel pseudo differential inputs
  • Accurate on-chip 2.5 V reference
  • ±0.2% maximum at 25°C, 25 ppm/°C maximum
  • Power consumption
    • 6 mW maximum at 1.5 MSPS with 3 V supplies
    • 13.5 mW maximum at 1.5 MSPS with 5 V supplies
  • 69 dB SINAD at 50 kHz input frequency
  • No pipeline delays
  • High speed parallel interface—word/byte modes
  • Full shutdown mode: 2 μA maximum
  • 32-lead LFCSP and TQFP packages
Additional Details
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The AD7938/AD7939 are 12-bit and 10-bit, high speed, low power, successive approximation (SAR) analog-to-digital converters (ADCs). The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1.5 MSPS. The parts contain a low noise, wide bandwidth, differential track-and-hold amplifier that can handle input frequencies up to 50 MHz.

The AD7938/AD7939 feature eight analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. These parts can operate with either single-ended, fully differential, or pseudo differential analog inputs.

The conversion process and data acquisition are controlled using standard control inputs that allow easy interfacing with microprocessors and DSPs. The input signal is sampled on the falling edge of CONVST and the conversion is also initiated at this point.

The AD7938/AD7939 have an accurate on-chip 2.5 V reference that can be used as the reference source for the analog-to-digital conversion. Alternatively, this pin can be overdriven to provide an external reference.

These parts use advanced design techniques to achieve very low power dissipation at high throughput rates. They also feature flexible power management options. An on-chip control register allows the user to set up different operating conditions, including analog input range and configuration, output coding, power management, and channel sequencing.

Product Highlights

  1. High throughput with low power consumption.
  2. Eight analog inputs with a channel sequencer.
  3. Accurate on-chip 2.5 V reference.
  4. Single-ended, pseudo differential, or fully differential analog inputs that are software selectable.
  5. Single-supply operation with VDRIVE function. The VDRIVE function allows the parallel interface to connect directly to 3 V or 5 V processor systems independent of VDD.
  6. No pipeline delay.
  7. Accurate control of the sampling instant via a CONVST input and once-off conversion control.
Part Models 4
1ku List Price Starting From $12.11

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7938BCPZ
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AD7938BCPZ-REEL7
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AD7938BSUZ
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Product Lifecycle

PCN

Sep 13, 2017

- 16_0077

CANCELLED: Conversion of Select 4x4, 5x5, 6x6 and 7x7mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE Korea.

Sep 30, 2011

- 11_0229

AD7938/AD7938-6 Datasheet Specification Change

AD7938BCPZ

PRODUCTION

AD7938BCPZ-REEL7

PRODUCTION

AD7938BSUZ

PRODUCTION

AD7938BSUZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

AD7938BCPZ

PRODUCTION

AD7938BCPZ-REEL7

PRODUCTION

AD7938BSUZ

PRODUCTION

AD7938BSUZ-REEL7

PRODUCTION

Jan 5, 2009

- 07_0077

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Sep 13, 2017

- 16_0077

arrow down

CANCELLED: Conversion of Select 4x4, 5x5, 6x6 and 7x7mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE Korea.

Sep 30, 2011

- 11_0229

arrow down

AD7938/AD7938-6 Datasheet Specification Change

AD7938BCPZ

PRODUCTION

AD7938BCPZ-REEL7

PRODUCTION

AD7938BSUZ

PRODUCTION

AD7938BSUZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

arrow down

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

AD7938BCPZ

PRODUCTION

AD7938BCPZ-REEL7

PRODUCTION

AD7938BSUZ

PRODUCTION

AD7938BSUZ-REEL7

PRODUCTION

Jan 5, 2009

- 07_0077

arrow down

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

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Software & Part Ecosystem

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