MAX1221, MAX1223, MAX1343 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Description

The MAX1221/MAX1223/MAX1343 integrate a multichannel, 12-bit, analog-to-digital converter (ADC) and a 12-bit, digital-to-analog converter (DAC) in a single IC. The devices also include a temperature sensor and configurable general-purpose I/O ports (GPIOs) with a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The ADC is available in a 12 or an eight input-channel version. The DAC outputs settle within 2.0µs, and the ADC has a 225ksps conversion rate.

All devices include an internal reference (2.5V) providing a well-regulated, low-noise reference for both the ADC and DAC. Programmable reference modes for the ADC and DAC allow the use of an internal reference, an external reference, or a combination of both. Features such as an internal ±1°C accurate temperature sensor, FIFO, scan modes, programmable internal or external clock modes, data averaging, and AutoShutdown™ allow users to minimize both power consumption and processor requirements. The low glitch energy (4nV•s) and low digital feedthrough (0.5nV•s) of the integrated DACs make these devices ideal for digital control of fast-response closed-loop systems.

The devices are guaranteed to operate with a supply voltage from +2.7V to +5.25V. The devices consume 2.5mA at 225ksps throughput, only 22µA at 1ksps throughput, and under 0.2µA in the shutdown mode. The MAX1221/MAX1343 offer four GPIOs that can be configured as inputs or outputs.

The MAX1221/MAX1223/MAX1343 are available in 36-pin thin QFN packages. All devices are specified over the -40°C to +85°C temperature range.

Key Features

Applications/Uses

12-Bit, 225ksps ADC
- Analog Multiplexer with True-Differential Track/Hold (T/H)
- 12 Single-Ended Channels or Six Differential Channels (Unipolar or Bipolar) (MAX1223)
- Eight Single-Ended Channels or Four Differential Channels (Unipolar or Bipolar) (MAX1221/MAX1343)
- Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
12-Bit, Octal, 2µs Settling DAC (MAX1221/MAX1223)
- Ultra-Low Glitch Energy (4nV•s)
- Power-Up Options from Zero Scale or Full Scale
- Excellent Accuracy: ±0.5 LSB INL
Internal Reference or External Single-Ended/Differential Reference
- Internal Reference Voltage 2.5V
Internal ±1°C Accurate Temperature Sensor
On-Chip FIFO Capable of Storing 16 ADC Conversion Results and One Temperature Result
On-Chip Channel-Scan Mode and Internal Data-Averaging Features
Analog Single-Supply Operation
- +2.7V to +5.25V
2.7V to AV_DD Digital Supply
25MHz, SPI/QSPI/MICROWIRE Serial Interface
AutoShutdown Between Conversions
Low-Power ADC
- 2.5mA at 225ksps
- 22µA at 1ksps
- 0.2µA at Shutdown
Low-Power DAC: 1.5mA
Evaluation Kit Available (Order MAX1258EVKIT)

	Closed-Loop Controls for Optical Components and Base Stations
	Data Acquisition Systems
	System Supervision and Control

Key Specifications: Precision ADCs (< 5Msps)

Part Number

Resolution
(bits)

Input Chan.

Conv. Rate
(ksps)

Conv. Time
(µs)

Data Bus
(bits)

Ref.
(V)

Diff. Inputs

V_SUPPLY
(V)

I_CC
(mA)

Power
(mW)

Standby Mode

Package/Pins

Price

ADC

max

typ

See Notes

MAX1343

300

2.7

Serial

Ext.

Int.+2.5

Yes

3.3

5.3

15.9

Yes

TQFN/36

MAX1221

3.5

TQFN/36

$13.79 @1k

MAX1223

3.5

TQFN/36

See All Precision ADCs (< 5Msps) (377)

Diagram

Functional Diagram

Design Guides

Digital Potentiometers (PDF)

Reliability Reports

Reliability Report: MAX1221.pdf

Show FIT data for:

Request Reliability Report for:

Software/Models

none

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-10 of 10

MAX1221 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX1221BETX

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MAX1221BETX+T

Active

Land Pattern: Not Available

-40°C to +85°C See data sheet

MAX1221BETX+

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666+3*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1221BETX-T

Active

Land Pattern: Not Available

-40°C to +85°C See data sheet

MAX1223 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX1223BETX

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MAX1223BETX-T

Active

Land Pattern: Not Available

-40°C to +85°C See data sheet

MAX1343 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX1343BETX

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MAX1343BETX-T

Active

Land Pattern: Not Available

-40°C to +85°C See data sheet

MAX1343BETX+

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666+3*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1343BETX+T

Active TQFN;36 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666+3*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

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See All Precision ADCs (< 5Msps) (377 Products)

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Document Ref.: 19-4010; Rev 1; 2008-03-25
This page last modified: 2009-09-04