MAX1117：Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

Industry's Lowest-Power ADC Comes in SOT23

The MAX1117/MAX1118/MAX1119 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference (MAX1117/MAX1119), clock, and serial interface. The MAX1118 is specified from +2.7V to +5.5V and consumes only 135µA at 100ksps. The MAX1117 is specified from +2.7V to +3.6V, and the MAX1119 is specified from +4.5V to +5.5V, each consumes only 175µA at 100ksps. The full-scale analog input range is determined by the internal reference of +2.048V (MAX1117) or +4.096V (MAX1119), or by an externally applied reference ranging from +1V to VDD (MAX1118). All devices feature an automatic shutdown mode that reduces supply current to < 1µA when the device is not in use. The 3-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 100ksps are performed using an internal clock. The MAX1117/MAX1118/MAX1119 are available in an 8-pin SOT23 package with a footprint that is only 11% of an 8-pin plastic DIP.

Key Features

Single Supply
- +2.7V to +3.6V (MAX1117)
- +2.7V to +5.5V (MAX1118)
- +4.5V to +5.5V (MAX1119)
Internal Track/Hold: 100kHz Sampling Rate
Internal Reference
- +2.048V (MAX1117)
- +4.096V (MAX1119)
Reference Input Range: 0 to VDD (MAX1118)
SPI/QSPI/MICROWIRE-Compatible Serial Interface
Small 8-Pin SOT23 Package
Automatic Power-Down
Analog Input Range: 0 to VREF
Low Power
- 175µA at 100ksps (typ) (MAX1117/MAX1119)
- 135µA at 100ksps (typ) (MAX1118)
- 18µA at 10ksps (typ)
- 1µA (typ) in Power-Down Mode

MAX1117, MAX1118, MAX1119: Typical Operating Circuit

Applications/Uses

4mA to 20mA Powered Remote Data Acquisition Systems
Battery-Powered Test Equipment
Low-Power, Handheld Portable Devices
Receive Signal Strength Indicators
Solar-Powered Remote Systems
System Diagnostics

DataSheet

title	Download file
MAX1117-MAX1119 Data Sheet	MAX1117-MAX1119.pdf

Parametrics

Part Number	Resolution (bits)	Input Chan.	Conv. Rate (ksps)	ADC Architecture	Data Bus	Diff/S.E. Input	Internal V_REF (V)	External V_REF (V)	External V_REF (V)	Unipolar V_IN (V)	SNR (dB)	THD (dB)	INL (±LSB)	Package/Pins	Budgetary Price
Part Number	ADC	Input Chan.	max	ADC Architecture	Data Bus	Diff/S.E. Input	nominal	min	max	max	SNR (dB)	THD (dB)	INL (±LSB)	Package/Pins	See Notes
MAX1117	8	2	100	SAR	SPI	S.E. Only	2.048	-	-	2.048	48	-69	1	SOT/8	$1.04 @1k
MAX1118							-	1	5.5	5.5	48			SOT/8	$0.81 @1k
MAX1119							4.096	-	-	4.096	49			SOT/8	$1.04 @1k

Design kits & evaluation modules

MAX1117EVSYS

Ordering Information

Part Number	Status	Package	Temp	RoHS
MAX1117EKA	Active	SOT,;8 pin;9 mm²	-40°C to +85°C	No
MAX1117EKA+	Active	SOT,;8 pin;9 mm²	-40°C to +85°C	Lead Free
MAX1117EKA+T	Active	SOT,;8 pin;9 mm²	-40°C to +85°C	Lead Free
MAX1117EKA-T	Active	SOT,;8 pin;9 mm²	-40°C to +85°C	No

MAX1117-MAX1119.pdf MAX1119

Bench Characterization of ADCs Using a Low-Cost PC-Based Data-Acquisition Board MAX6341

MAX1117-MAX1119.pdf MAX1119