MAX1112:+5V, Low-Power, Multichannel, Serial 8-Bit ADCs

Lowest-Power 8-Bit 4/8-Channel ADCs Have Internal Reference

The MAX1112/MAX1113 low-power, 8-bit, 8-channel analog-to-digital converters (ADCs) feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single 4.5V to 5.5V supply and consume only 135μA while sampling at rates up to 50ksps. The MAX1112's 8 analog inputs and the MAX1113's 4 analog inputs are software-configurable, allowing unipolar/bipolar and single-ended/differential operation. Successive-approximation conversions are performed using either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 4.096V internal reference, or by an externally applied reference ranging from 1V to VDD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-driven processors. The MAX1112/MAX1113 have a software-programmable, 2µA automatic power-down mode to minimize power consumption. Using power-down, the supply current is reduced to 13µA at 1ksps, and only 82µA at 10ksps. Power-down can also be controlled using the active-low SHDN input pin. Accessing the serial interface automatically powers up the device. The MAX1112 is available in a 20-pin SSOP package. The MAX1113 is available in a small 16-pin QSOP package.

Key Features
  • 4.5V to 5.5V Single Supply
  • Low Power:
    • 135µA at 50ksps
    • 13µA at 1ksps
  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1112)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1113)
  • Internal Track/Hold; 50kHz Sampling Rate
  • Internal 4.096V Reference
  • SPI/QSPI/MICROWIRE-Compatible Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • Total Unadjusted Error:
    • ±1 LSB (max)
    • ±0.3 LSB (typ)
MAX1112, MAX1113: Typical Operating Circuit
MAX1112, MAX1113: Typical Operating Circuit
Applications/Uses
  • 4mA- to 20mA-Powered Remote Data-Acquisition Systems
  • Battery-Powered Applications
  • System Diagnostics
  • Touch-Screen Applications
DataSheet
titleDownload file
MAX1112-MAX1113 Data SheetMAX1112-MAX1113.pdf
Parametrics
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
MAX11128850SARSPIBoth4.09615.54.0962.04849-700.1CDIP(N)/20
PDIP(N)/20
SSOP/20
$2.07 @1k
MAX11134CDIP(N)/16
PDIP(N)/16
QSOP/16
$2.43 @1k
Design kits & evaluation modules
Related Products
  • MAX1103:8-Bit CODECs
  • MAX1106:Single-Supply, Low-Power, Serial 8-Bit ADCs
  • MAX1107:Single-Supply, Low-Power, Serial 8-Bit ADCs
  • MAX1108:Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs
  • MAX1109:Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs
  • MAX1111:+2.7V, Low-Power, Multichannel, Serial, 8-Bit ADCs
  • MAX1110:+2.7V, Low-Power, Multichannel, Serial, 8-Bit ADCs
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1112C/DNo Longer AvailableDICE;0°C to +70°CSee data sheet
MAX1112CAPNo Longer AvailableMAX1112CAP+SSOP,;20 pin;57.9 mm²0°C to +70°CNo
MAX1112CAP+ActiveSSOP,;20 pin;57.9 mm²0°C to +70°CLead Free
MAX1112CAP+TActiveSSOP,;20 pin;57.9 mm²0°C to +70°CLead Free
MAX1112CAP-TNo Longer AvailableMAX1112CAP+TSSOP;20 pin0°C to +70°CSee data sheet
MAX1112CPPNo Longer AvailableMAX1112CAP+PDIP(N),;20 pin;217.1 mm²0°C to +70°CNo
MAX1112CPP+No Longer AvailableMAX1112CAP+PDIP(N),;20 pin;217.1 mm²0°C to +70°CLead Free
MAX1112EAPNo Longer AvailableMAX1112EAP+SSOP,;20 pin;57.9 mm²-40°C to +85°CNo
MAX1112EAP+ActiveSSOP,;20 pin;57.9 mm²-40°C to +85°CLead Free
MAX1112EAP+TActiveSSOP;20 pin-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1112EAP-TNo Longer AvailableMAX1112EAP+TSSOP,;20 pin;57.9 mm²-40°C to +85°CNo
MAX1112EPPNo Longer AvailableMAX1112EAP+PDIP(N),;20 pin;217.1 mm²-40°C to +85°CNo
MAX1112EPP+No Longer AvailableMAX1112EAP+PDIP(N),;20 pin;217.1 mm²-40°C to +85°CLead Free
MAX1112MJPNo Longer AvailableCDIP(N),;20 pin;218.9 mm²-55°C to +125°CNo
MAX1112-MAX1113.pdf MAX1113
MAX1112-MAX1113.pdf MAX1113