TSA7887: A MICROPOWER, 2-CHANNEL, 125-KSPS, SERIAL-OUTPUT 12-BIT SAR ADC

FUNCTIONAL BLOCK DIAGRAM

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APPLICATIONS

  • Instrumentation and Control Systems
  • High-Speed Modems
  • Battery-powered systems:
    • Personal Digital Assistants, Medical Instruments, Mobile Communication

KEY SPECIFICATIONS

  • Alternate Source for AD7887
  • Single-supply Operation: +2.7V to +5.25V
  • INL: ±1LSB – TSA7887B±2LSBs – TSA7887A
  • One or Two Single-ended Analog Inputs
  • Internal Wide-bandwidth Track-and-Hold
  • Internal +2.5-V Reference
  • Flexible Power/Throughput-Rate Management0.85mA at 125ksps (Internal VREF ON)

    0.7mA at 125ksps (Internal VREF OFF)

  • Shutdown-mode Supply Current: 1μA (max)
  • SPI®/QSPI™/MICROWIRE™/DSP-Compatible Serial Interfaces
  • Operating Temperature Range: -40ºC to +125ºC
  • 8-pin SOIC and MSOP Packaging

Check Price and Availability

KEY SPECIFICATIONS – TSA7887

Part Number VDD (min)
(V)
VDD (max)
(V)
IDD (µA) INL
(LSB)
DNL
(LSB)
Throughput Rate
(ksps)
Analog
Input Type
1K Price Request Free
Samples
TSA7887A +2.7 +5.25 0.85 ±2 ±1 125 One/Two-channelSE – Unipolar $1.25 Request Here
TSA7887B +2.7 +5.25 0.85 ±1 ±1 125 One/Two-channelSE – Unipolar $1.29 Request Here

DESCRIPTION

The TSA7887 – a pin compatible, specification identical alternate source for the AD7887 – is a self-contained, 2-channel, high-speed, micropower, 12-bit analog-to-digital converter (ADC) that operates from a single +2.7V to +5.25V power supply. The TSA7887 is capable of 125-ksps throughput rate with an external 2MHz serial clock and draws 0.85mA supply current. Two electrical grade options for the TSA7887 are available: the TSA7887A with ±2LSB (max) INL and the TSA7887B with ±1LSB (max) INL.

The wideband input track-and-hold acquires signals in 500ns and features a single-ended sampling topology. Output data coding is straight binary and the ADC is capable of converting full power signals of up to 2.5 MHz. The ADC also contains an internal 2.5V reference or the VREF pin can be overdriven by an external reference.

The TSA7887’s provides one or two analog inputs each with an analog input range from 0 to VREF. Efficient circuit design ensures low power consumption of 2mW (typical) for normal operation and 3μW in power-down operation.

The TSA7887 is fully specified from -40ºC to +125ºC and is available in 8-pin SOIC (both TSA7887A and TSA7887B) and MSOP (TSA7887A only) packages.

PIN ASSIGNMENTS / PACKAGE OUTLINES

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RoHS/Pb-free Packaging Information: Touchstone Semiconductor supplies only lead-free packaging.

ORDERING INFORMATION AND PRICING

Part Number Status VDD (V) IDD
(µA)
VOS (mV)
TCVOS(µV/°C)
Package
/Pin Count
Package
Quantity
/Carrier
Temperature
Range
1k+
Price
TSA7887ARMZ Active +2.7V +5.25V 0.85 @ 125ksps MSOP-8 50 Units
/Tube
-40°C to +125°C $1.25 Check Inventory
TSA7887ARMZ-REEL Active +2.7V +5.25V 0.85 @ 125ksps MSOP-8 2500 Units
/Tape & Reel
-40°C to +125°C $1.25 Check Inventory
TSA7887ARZ Active +2.7V +5.25V 0.85 @ 125ksps SOIC-8 50 Units
/Tube
-40°C to +125°C $1.25 Check Inventory
TSA7887ARZ-REEL Active +2.7V +5.25V 0.85 @ 125ksps SOIC-8 2500 Units
/Tape & Reel
-40°C to +125°C $1.25 Check Inventory
TSA7887BRZ Active +2.7V +5.25V 0.85 @ 125ksps SOIC-8 50 Units
/Tube
-40°C to +125°C $1.29 Check Inventory
TSA7887BRZ-REEL Active +2.7V +5.25V 0.85 @ 125ksps SOIC-8 2500 Units
/Tape & Reel
-40°C to +125°C $1.29 Check Inventory

Nota bene: The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (USD or US$, FOB USA per unit for the stated volume), and is subject to change without notice. Quantity pricing may vary substantially. International prices may differ because of local duties, taxes, fees, and currency exchange rates. For volume-specific pricing information and/or delivery quotes, please contact your local Touchstone Semiconductor manufacturer’s sales representative or authorized distributor.