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MAX1280, MAX1280B, MAX1281, MAX1281B
400ksps/300ksps, Single-Supply, Low-Power, 8-Channel, Serial 12-Bit ADCs with Internal Reference
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Status
Active: In Production.
Description
The MAX1280/MAX1281 12-bit ADCs combine an 8-channel analog-input multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. The MAX1280 operates from a single +4.5V to +5.5V supply; the MAX1281 operates from a single +2.7V to +3.6V supply. Both devices' analog inputs are software configurable for unipolar/bipolar and single-ended/pseudo-differential operation.
The 4-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1280/MAX1281 use an external serial-interface clock to perform successive-approximation analog-to-digital conversions. Both parts feature an internal +2.5V reference and a reference-buffer amplifier with a ±1.5% voltage-adjustment range. An external reference with a 1V to VDD1 range may also be used.
The MAX1280/MAX1281 provide a hard-wired active-low SHDN pin and four software-selectable power modes (normal operation, reduced power, fast power-down, and full power-down). These devices can be programmed to automatically shut down at the end of a conversion or to operate with reduced power. When using the power-down modes, accessing the serial interface automatically powers up the devices, and the quick turn-on time allows them to be powered down between all conversions. This technique can cut supply current to under 100µA at reduced sampling rates.
The MAX1280/MAX1281 are available in 20-pin TSSOP packages. These devices are higher-speed versions of the MAX146/MAX147 (for more information, see the respective data sheet).
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Data Sheet
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An evaluation kit is available: MAX1280EVC16, MAX1280EVKIT
Key Features
- 8-Channel Single-Ended or 4-Channel Pseudo-Differential Inputs
- Internal Multiplexer and Track/Hold
- Single-Supply Operation
- +4.5V to +5.5V (MAX1280)
- +2.7V to +3.6V (MAX1281)
- Internal +2.5V Reference
- 400ksps Sampling Rate (MAX1280)
- Low Power 2.5mA (400ksps)
- 1.3mA (Reduced-Power Mode)
- 0.9mA (Fast Power-Down Mode)
- 2µA (Full Power-Down)
- SPI/QSPI/MICROWIRE/TMS320-Compatible
- Software-Configurable Unipolar or Bipolar Inputs
- 20-Pin TSSOP Package
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Applications/Uses
- Battery-Powered Applications
- Data Acquisition
- Medical Instruments
- Pen Digitizers
- Portable Data Logging
- Process Control
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Key Specifications:
| Precision ADCs (< 5Msps) |
| Part Number |
Resolution
(bits) |
Input Chan. |
Conv. Rate
(ksps) |
Data Bus
(bits) |
Diff/S.E. Input |
Internal VREF
(V) |
External VREF
(V) |
External VREF
(V) |
Unipolar VIN
(V) |
Bipolar VIN
(±V) |
SINAD
(dB) |
THD
(dB) |
SFDR
(dB) |
DNL
(±LSB) |
INL
(±LSB) |
Package/Pins |
Budgetary Price |
| ADC |
max |
nominal |
min |
max |
max |
max |
See Notes |
| MAX1280 |
12 |
8 |
400 |
SPI |
Both |
2.5 |
1 |
5.5 |
2.5 |
1.25 |
70 |
-81 |
80 |
1 |
1 |
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$8.02 @1k |
| MAX1281 |
300 |
3.6 |
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$8.02 @1k |
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See All Precision ADCs (< 5Msps) (417)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
| Reliability Report: |
MAX1280.pdf |
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX1280BCUP
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1280BCUP+
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1280BCUP+T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1280BCUP-T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1280BEUP
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1280BEUP+
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1280BEUP+T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1280BEUP-T
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Active |
TSSOP;20 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX1281BCUP
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
|
0°C to +70°C
|
RoHS/Lead-Free: No
Materials Analysis |
| MAX1281BCUP+
|
|
|
Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
|
0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX1281BCUP+T
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Active |
TSSOP;20 pin
Land Pattern: Not Available
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0°C to +70°C
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See data sheet
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| MAX1281BCUP-T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
|
0°C to +70°C
|
RoHS/Lead-Free: No
Materials Analysis |
| MAX1281BEUP
|
|
|
Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
|
-40°C to +85°C
|
RoHS/Lead-Free: No
Materials Analysis |
| MAX1281BEUP+
|
|
|
Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1281BEUP+T
|
|
|
Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1281BEUP-T
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Active |
TSSOP;20 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.
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Evaluation Kits
Products with Similar Part Numbers
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-1684
Rev 2;
2010-11-30
This page last modified: 2011-04-25
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