MAX11644：Low-Power, 1-/2-Channel, I²C, 12-Bit ADCs in Ultra-Tiny 1.9mm x 2.2mm Package

1-/2-Channel, 12-Bit ADCs Broaden the Industry's Largest I²C Portfolio

The MAX11644/MAX11645 low-power, 12-bit, 1-/2-channel analog-to-digital converters (ADCs) feature internal track/hold (T/H), voltage reference, clock, and an I²C-compatible 2-wire serial interface. These devices operate from a single supply of 2.7V to 3.6V (MAX11645) or 4.5V to 5.5V (MAX11644) and require only 6µA at a 1ksps sample rate. AutoShutdown™ powers down the devices between conversions, reducing supply current to less than 1µA at low throughput rates. The MAX11644/MAX11645 each measure two single-ended or one differential input. The fully differential analog inputs are software configurable for unipolar or bipolar, and single-ended or differential operation. The full-scale analog input range is determined by the internal reference or by an externally applied reference voltage ranging from 1V to VDD. The MAX11645 features a 2.048V internal reference and the MAX11644 features a 4.096V internal reference. The MAX11644/MAX11645 are available in an ultra-tiny 1.9mm x 2.2mm WLP package and an 8-pin µMAX® package. The MAX11644/MAX11645 are guaranteed over the extended temperature range (-40°C to +85°C). For pin-compatible 10-bit parts, refer to the MAX11646/MAX11647 data sheet.

Key Features

Ultra-Tiny 1.9mm x 2.2mm Wafer Level Package
High-Speed I²C-Compatible Serial Interface
- 400kHz Fast Mode
- 1.7MHz High-Speed Mode
Single-Supply
- 2.7V to 3.6V (MAX11645)
- 4.5V to 5.5V (MAX11644)
Internal Reference
- 2.048V (MAX11645)
- 4.096V (MAX11644)
External Reference: 1V to VDD
Internal Clock
- 2-Channel Single-Ended or 1-Channel Fully Differential
Internal FIFO with Channel-Scan Mode
Low Power
- 670µA at 94.4ksps
- 230µA at 40ksps
- 60µA at 10ksps
- 6µA at 1ksps
- 0.5µA in Power-Down Mode
Software-Configurable Unipolar/Bipolar

MAX11644, MAX11645: Typical Operating Circuit

Applications/Uses

Battery-Powered Test Equipment
Handheld Portable Applications
Medical Instruments
Power-Supply Monitoring
Received-Signal-Strength Indicators
Solar-Powered Remote Systems
System Supervision

DataSheet

title	Download file
MAX11644-MAX11645 Data Sheet	MAX11644-MAX11645.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)	Bipolar 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	max	SNR (dB)	THD (dB)	INL (±LSB)	Package/Pins	See Notes
MAX11644	12	2	94.4	SAR	I2C	Both	4.096	1	5.5	4.096	2.048	70	-78	1	µMAX/8	$1.26 @1k
MAX11645	12	2	94.4	SAR	I2C	Both	2.048	1	3.6	2.048	1.024	70	-78	1	µMAX/8 WLP/12	$1.11 @1k

Design kits & evaluation modules

MAXADCLITE

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX11644EUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX11644EUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free

MAX11644-MAX11645.pdf MAX11645

MAX11644-MAX11645.pdf MAX11644