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ADS7870 Status: ACTIVE

12-Bit ADC, MUX, PGA and Internal Reference Data Acquisition System


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See Also

  • ADS7871 - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.  14-bit equivalent device
 ADS7870
Resolution(Bits)12  
Sample Rate (max)52kSPS  
ArchitectureSAR  
Power Consumption(Typ)(mW)4.6  
SINAD(dB)72  
DNL(Max)(+/-LSB)0.5  
INL(Max)(+/-LSB)2  
No Missing Codes(Bits)12  
No. of Supplies1  
Analog Voltage AV/DD(Min)(V)2.7  
Analog Voltage AV/DD(Max)(V)5.25  
Logic Voltage DV/DD(Min)(V)2.7  
Logic Voltage DV/DD(Max)(V)5.25  
Input Configuration RangeVref/PGA(1,2,4,5,8,10,16,20)  
Reference ModeInt  
RatingCatalog  
Pin/Package28SSOP  
# Input Channels8  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • ADS7871: 14-Bit 48KSPS DAS with ADC, MUX, PGA and Internal Reference
  • ADS7828: 12-Bit 50 kSPS ADC I2C Low Power 8-Channel MUX Int 2.5V Ref
  • ADS1255: 24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC
  • SN74LVC14A: Hex Schmitt-Trigger Inverter
  • REF3012: 1.25V 50ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference
  • TPS54612: 3V to 6V, 6A Synchronous Step Down SWIFT™ Converter with 1.2V Output

More Related Products

Product Information

Features

  • PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20V/V
  • Programmable Input (Up to 4-channel Differential/Up to 8-channel Single-Ended or Some Combination)
  • 1.15-V, 2.048-V or 2.5-V Internal Reference
  • SPI/DSP Compatible Serial Interface (≤20 MHz)
  • Throughput Rate: 52 kSamples/sec
  • Error/Overload Indicator
  • Programmable Output 2s Complement/Binary
  • 2.7-V to 5.5-V Single-Supply Operation
  • 4-Bit Digital I/O Via Serial Interface
  • Pin Compatible With ADS7871
  • SSOP-28 Package
  • APPLICATIONS
    • Portable Battery-Powered Systems
    • Low-Power Instrumentation
    • Low-Power Control Systems
    • Smart Sensor Applications

QSPI and SPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor Corporation.
All other trademarks are the property of their respective owners.

Description

The ADS7870 (US patents 6140872, 6060874) is a complete low-power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 12-bit successive approximation analog-to-digital (A/D) converter, and a precision voltage reference.

The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.

For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.

The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.

The ADS7870 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7870s share a common reference.

The serial interface allows the use of SPI™, QSPI™, Microwire™, and 8051-family protocols, without glue logic.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
ADS7870EAACTIVE-40 to 854.60 | 1kuSSOP (DB) | 28 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
ADS7870EA/1KACTIVE-40 to 854.15 | 1kuSSOP (DB) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7870EA/1KG4ACTIVE-40 to 854.15 | 1kuSSOP (DB) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
ADS7870EAG4ACTIVE-40 to 854.60 | 1kuSSOP (DB) | 28 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 12:10 PM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 6 WeeksADS7870EA
AmericasArrow 216
Avnet >1k
Newark 735
AsiaWPI 137
EuropeCompel 141
WorldwideDigiKey >1k
Mouser Electronics 5
TI Lead Time*: 20 WeeksADS7870EA/1K
AmericasArrow >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksADS7870EA/1KG4
WorldwideDigiKey  Available
TI Lead Time*: 6 WeeksADS7870EAG4
AsiaFarnell Asia 33
EuropeFarnell 24
WorldwideDigiKey  Available
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
ADS7870EA RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ADS7870EA/1K RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ADS7870EA/1KG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ADS7870EAG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for ADS7870 Help

Datasheet

Application Notes

View Application Notes for Analog to Digital Converter

User Guides

View User Guides for Analog to Digital Converter

Tools & Software

NamePart # Company Tool / Software Type
Anti-Aliasing Calculation Tool for A to D ConvertersANTIALIASINGCALCTexas InstrumentsCalculation Utilities
Op Amp to ADC Circuit Topology CalculatorADC-INPUT-CALCTexas InstrumentsCalculation Utilities
ADS7870 Evaluation ModuleADS7870EVMTexas InstrumentsDevelopment Boards/EVMs

Part # Name Product Family Comments
ADS7871   14-Bit 48KSPS DAS with ADC, MUX, PGA and Internal Reference   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.  14-bit equivalent device  
Customers Who Evaluated This Product Also Evaluated...
ADS7871 14-Bit 48KSPS DAS with ADC, MUX, PGA and Internal Reference DATA CONVERTERS-ANALOG TO DIGITAL CONVERTER TI customers also evaluated this product.
ADS7828 12-Bit 50 kSPS ADC I2C Low Power 8-Channel MUX Int 2.5V Ref DATA CONVERTERS-ANALOG TO DIGITAL CONVERTER TI customers also evaluated this product.
ADS1255 24 Bit, 30kSPS Very Low Noise Delta-Sigma ADC DATA CONVERTERS-ANALOG TO DIGITAL CONVERTER TI customers also evaluated this product.
ADS7953 12 bit, 1 MSPS, 16 ch, single ended, micro power, sr i/f, SAR ADC DATA CONVERTERS-ANALOG TO DIGITAL CONVERTER TI customers also evaluated this product.
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REF3012 1.25V 50ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference VOLTAGE REFERENCE-SERIES VOLTAGE REFERENCE TI customers also evaluated this product.
TPS54612 3V to 6V, 6A Synchronous Step Down SWIFT™ Converter with 1.2V Output DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
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