MAX11121

1Msps, Low-Power, Serial 12-/10-/8-Bit, 4-/8-/16-Channel ADCs

Pin-/Software-Compatible Family of 1Msps, Multichannel SAR ADCs with External Reference, 1MHz Full Linear Bandwidth, and SPI Interface Offers Rich Feature Set


Please check latest availability status for a specific part variant.

Description

The MAX11120–MAX11128 are 12-/10-/8-bit with external reference and industry-leading 1.5MHz, full linear bandwidth, high speed, low-power, serial output successive approximation register (SAR) analog-to-digital converters (ADCs). The MAX11120–MAX11128 include both internal and external clock modes. These devices feature scan mode in both internal and external clock modes. The internal clock mode features internal averaging to increase SNR. The external clock mode features the SampleSet™ technology, a user-programmable analog input channel sequencer. The SampleSet approach provides greater sequencing flexibility for multichannel applications while alleviating significant microcontroller or DSP (controlling unit) communication overhead.

The internal clock mode features an integrated FIFO allowing data to be sampled at high speeds and then held for readout at any time or at a lower clock rate. Internal averaging is also supported in this mode improving SNR for noisy input signals. The devices feature analog input channels that can be configured to be single-ended inputs, fully differential pairs, or pseudo-differential inputs with respect to one common input. The MAX11120–MAX11128 operate from a 2.35V to 3.6V supply and consume only 5.4mW at 1Msps.

The MAX11120–MAX11128 include AutoShutdown™, fast wake-up, and a high-speed 3-wire serial interface. The devices feature full power-down mode for optimal power management.

The 16MHz, 3-wire serial interface directly connects to SPI, QSPI™, and MICROWIRE™ devices without external logic.

Excellent dynamic performance, low voltage, low power, ease of use, and small package size make these converters ideal for portable battery-powered data-acquisition applications, and for other applications that demand low power consumption and small space.

The MAX11120–MAX11128 are available in 28-pin, 5mm x 5mm, TQFN packages and operate over the -40°C to +125°C temperature range. 
MAX11120, MAX11121, MAX11122, MAX11123, MAX11124, MAX11125, MAX11126, MAX11127, MAX11128: Typical Application Circuit MAX11120, MAX11121, MAX11122, MAX11123, MAX11124, MAX11125, MAX11126, MAX11127, MAX11128: Typical Application Circuit Enlarge+

Key Features

  • Scan Modes, Internal Averaging, and Internal Clock
  • 16-Entry First-In/First-Out (FIFO)
  • SampleSet: User-Defined Channel Sequence with Maximum Length of 256
  • Analog Multiplexer with True Differential Track/Hold
    • 16-/8-/4-Channel Single-Ended
    • 8-/4-/2-Channel Fully-Differential Pairs
    • 15-/8-/4-Channel Pseudo-Differential Relative to a Common Input
  • Two Software-Selectable Bipolar Input Ranges
    • ±VREF+/2, ±VREF+
  • Flexible Input Configuration Across All Channels
  • High Accuracy
    • ±1 LSB INL, ±1 LSB DNL, No Missing Codes Over Temperature Range
  • 70dB SINAD Guaranteed at 250kHz Input Frequency
  • 1.5V to 3.6V Wide Range I/O Supply
    • Allows the Serial Interface to Connect Directly to 1.8V, 2.5V, or 3.3V Digital Systems
  • 2.35V to 3.6V Supply Voltage
  • Longer Battery Life for Portable Applications
    • Low Power
    • 5.4mW at 1Msps with 3V Supplies
    • 2µA Full-Shutdown Current
  • External Differential Reference (1V to VDD)
  • 16MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-Compatible Serial Interface
  • Wide -40°C to +125°C Operation
  • Space-Saving, 28-Pin, 5mm × 5mm TQFN Packages
  • 1Msps Conversion Rate, No Pipeline Delay
  • 12-/10-/8-Bit Resolution
  • AECQ-100 Qualified Variant Available (MAX11128ATI/V+)

Applications/Uses

  • Battery-Powered Instruments
  • High-Speed Closed-Loop Systems
  • High-Speed Data Acquisition Systems
  • Industrial Control Systems
  • Medical Instrumentation
  • Portable Systems

See parametric specs for Precision ADCs (< 5Msps) (434)


Part NumberResolution
(bits)
Input ChannelsConv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxmaxSee Notes
MAX11121 1041000SARSPIBoth13.63.63.661.7-860.4
TQFN/28
$1.92 @1k
MAX11122 124SPI172.6-871
TQFN/28
$2.15 @1k
MAX11123 88SPI149.6-770.02
TQFN/28
$1.54 @1k
MAX11125 128
Microwire
QSPI
SPI
-72.6-871
TQFN/28
$2.81 @1k
MAX11126 816SPI149.6-770.02
TQFN/28
$2.39 @1k
MAX11127 1016SPI161.7-860.4
TQFN/28
$3.63 @1k
MAX11128 1216SPI172.6-871
TQFN/28
TQFN-CU/28
$4.15 @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.

Tools & Models

  • MAX11120-8 IBIS Model
  • Request Reliability Report for: MAX11121 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    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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