MAX1142

14-Bit ADC, 200ksps, +5V Single-Supply with Reference


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Description

The MAX1142/MAX1143 are 200ksps, 14-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold, a clock, +4.096V reference, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (SINAD > 81dB), high-speed (200ksps), and low power (7.5mA) of these ADCs, make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1142 accepts input signals of 0 to +12V (unipolar) or ±12V (bipolar), while the MAX1143 accepts input signals of 0 to +4.096V (unipolar) or ±4.096V (bipolar). Operating from a single +4.75V to +5.25V analog supply and a +4.75V to +5.25V digital supply, power-down modes reduce current consumption to 1mA at 10ksps and further reduce supply current to less than 20µA at slower data rates. A serial strobe output (SSTRB) allows direct connection to the TMS320-family of digital signal processors. The MAX1142/MAX1143 user can select either the internal clock, or an external serial-interface clock for the ADC to perform analog-to-digital conversions.

The MAX1142/MAX1143 feature internal calibration circuitry to correct linearity and offset errors. On-demand calibration allows the user to optimize performance. Three user-programmable logic outputs are provided for the control of an 8-channel MUX or a PGA.
MAX1142, MAX1143: Typical Application Circuit MAX1142, MAX1143: Typical Application Circuit Enlarge+

Key Features

  • 200ksps (bipolar) and 150ksps (unipolar) Sampling ADC
  • 14-Bits, No Missing Codes
  • 1LSB INL Guaranteed
  • 81dB (min) SINAD
  • +5V Single-Supply Operation
  • Low Power Operation, 7.5mA (Unipolar Mode)
  • 2.5µA Shutdown Mode
  • Software-Configurable Unipolar & Bipolar Input Ranges
    • 0 to +12V and ±12V (MAX1142)
    • 0 to +4.096V and ±4.096V (MAX1143)
    • Internal or External Reference
  • Internal or External Clock
  • SPI/QSPI/MICROWIRE-Compatible Wire Serial Interface
  • Three User-Programmable Logic Outputs
  • Small 20-Pin SSOP Package

Applications/Uses

  • Data Acquisition

See parametric specs for Precision ADCs (< 5Msps) (437)


Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1142 141200SARSPIS.E. Only4.09634.2121282-911
SSOP/20
$8.71 @500
MAX1143 4.0964.096
SSOP/20
$8.22 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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