MAX11122：1Msps, 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

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.

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

MAX11120, MAX11121, MAX11122, MAX11123, MAX11124, MAX11125, MAX11126, MAX11127, MAX11128: Typical Application Circuit

Applications/Uses

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

DataSheet

title	Download file
MAX11120-MAX11128 Data Sheet	MAX11120-MAX11128.pdf

Parametrics

Part Number	Resolution (bits)	Input Chan.	Conv. Rate (ksps)	ADC Architecture	Data Bus	Diff/S.E. Input	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	min	max	max	max	SNR (dB)	THD (dB)	INL (±LSB)	Package/Pins	See Notes
MAX11120	8	4	1000	SAR	SPI	Both	1	3.6	3.6	3.6	49.6	-77	0.02	TQFN/28	$1.17 @1k
MAX11121	10	4			SPI		1				61.7	-86	0.4	TQFN/28	$1.92 @1k
MAX11122	12	4			SPI		1				72.6	-87	1	TQFN/28	$2.05 @1k
MAX11123	8	8			SPI		1				49.6	-77	0.02	TQFN/28	$1.47 @1k
MAX11124	10	8			Microwire QSPI SPI		-				61.7	-86	0.4	TQFN/28	$2.40 @1k
MAX11125	12	8			Microwire QSPI SPI		-				72.6	-87	1	TQFN/28	$2.68 @1k
MAX11126	8	16			SPI		1				49.6	-77	0.02	TQFN/28	$2.28 @1k
MAX11127	10	16			SPI		1				61.7	-86	0.4	TQFN/28	$3.58 @1k
MAX11128	12	16			SPI		1				72.6	-87	1	TQFN/28	$3.95 @1k

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX11122ATI+	Active		TQFN,;28 pin;26 mm²	-40°C to +125°C	Lead Free
MAX11122ATI+T	Active		TQFN,;28 pin;26 mm²	-40°C to +125°C	Lead Free

MAX11120-MAX11128.pdf MAX11128

MAX11120-MAX11128.pdf MAX11121