MAX1191:Ultra-Low-Power, 7.5Msps, Dual, 8-Bit ADC

The MAX1191 is an ultra-low-power, dual, 8-bit, 7.5Msps analog-to-digital converter (ADC). The device features two fully differential wideband track-and-hold (T/H) inputs. These inputs have a 440MHz bandwidth and accept fully differential or single-ended signals. The MAX1191 delivers a typical signal-to-noise and distortion (SINAD) of 48.6dB at an input frequency of 1.875MHz and a sampling rate of 7.5Msps while consuming only 12mW. This ADC operates from a 2.7V to 3.6V analog power supply. A separate 1.8V to 3.6V supply powers the digital output driver. In addition to ultra-low operating power, the MAX1191 features three power-down modes to conserve power during idle periods. Excellent dynamic performance, ultra-low power, and small size make the MAX1191 ideal for applications in imaging, instrumentation, and digital communications. An internal 1.024V precision bandgap reference sets the full-scale range of the ADC to ±0.512V. A flexible reference structure allows the MAX1191 to use its internal reference or accept an externally applied reference for applications requiring increased accuracy. The MAX1191 features parallel, multiplexed, CMOS-compatible tri-state outputs. The digital output format is offset binary. A separate digital power input accepts a voltage from 1.8V to 3.6V for flexible interfacing to different logic levels. The MAX1191 is available in a 5mm x 5mm, 28-pin thin QFN package, and is specified for the extended industrial (-40°C to +85°C) temperature range. For higher sampling frequency applications, refer to the MAX1195-MAX1198 dual 8-bit ADCs. See a parametric table of the complete family of pin-compatible, 8-bit high-speed ADCs.

Key Features
  • Ultra-Low Power
    • 12mW (Normal Operation: 7.5Msps)
    • 0.3µW (Shutdown Mode)
  • Excellent Dynamic Performance
    • 48.7dB SNR at fIN = 1.875MHz
    • 69dBc SFDR at fIN = 1.875MHz
  • 2.7V to 3.6V Single Analog Supply
  • 1.8V to 3.6V TTL/CMOS-Compatible Digital Outputs
  • Fully Differential or Single-Ended Analog Inputs
  • Internal/External Reference Option
  • Multiplexed CMOS-Compatible Tri-State Outputs
  • 28-Pin Thin QFN Package
  • Evaluation Kit Available (Order MAX1193EVKIT)
MAX1191: Functional Diagram
MAX1191: Functional Diagram
Applications/Uses
  • Battery-Powered Portable Instruments
  • IQ Baseband Sampling
  • Low-Power Video
  • Ultrasound and Medical Imaging
  • WLAN, Mobile DSL, WLL Receiver
DataSheet
titleDownload file
MAX1191 Data SheetMAX1191.pdf
Parametrics
Part NumberInput Chan.Resolution
(bits)
Sample Rate
(Msps)
SFDR
(dBc)
SINAD
(dB)
SNR
(dB)
THD
(dB)
DNL
(±LSB)
INL
(±LSB)
Full Pwr. BW
(MHz)
Data Bus InterfacePackage/PinsBudgetary
Price
max ≥minminSee Notes
MAX1191287.56948.648.7-680.130.15440µP/10TQFN/28$3.13 @1k

Part NumberInput Chan.SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
See Notes
MAX1191248.7-680.15TQFN/28$3.13 @1k
Related Products
  • MAX1192:Ultra-Low-Power, 22Msps, Dual 8-Bit ADC
  • MAX1193:Ultra-Low-Power, 45Msps, Dual 8-Bit ADC
  • MAX1198:Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC with Internal Reference and Parallel Outputs
  • MAX1195:Dual, 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1191ETINo Longer AvailableMAX1191ETI+TQFN,;28 pin;26 mm²-40°C to +85°CNo
MAX1191ETI+ActiveTQFN,;28 pin;26 mm²-40°C to +85°CLead Free
MAX1191ETI+TActiveTQFN,;28 pin;26 mm²-40°C to +85°CLead Free
MAX1191ETI-TNo Longer AvailableMAX1191ETI+TTQFN,;28 pin;26 mm²-40°C to +85°CNo
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Histogram Testing Determines DNL and INL Errors MAX1193
Selecting the Optimum Test Tones and Test Equipment for Successful High-Speed ADC Sinewave Testing MAX1449
Coherent Sampling vs. Window Sampling MAX1449
MAX1191.pdf MAX1191