User's Manual

Table Of Contents

Chapter 2

SNOA922–April 2013

Features

2.1 Gas Sensor Platform With BLE Design Features

• Coin-cell operation (CR2032)

• Low-power configurable AFE (LMP91000) that provides flexibility for customers to use the same AFE

for different gas-sensing platforms and configure different platforms with a simple firmware update

• Provides reference design for BLE antenna design - leveraging low-cost trace antenna

• Enables customers to use the platform to incorporate wireless features in gas-sensing applications

• TI provides BLE firmware and iOS application software as open-source to help customers get to the

market faster.

• The platform is comprised of two boards that are stacked together and are referred to as SAT0009

(power board) and SAT0010 (AFE and Bluetooth board).

LMP91000

• Supply voltage 2.7 to 5.25 V

• Supply current (average over time) <10 μA

• Cell-conditioning current up to 10 mA

• Reference electrode bias-current (85°C) 900 pA (max)

• Output drive-current 750 μA

• Complete potentiostat circuit to interface to most chemical cells

• Programmable cell-bias voltage

• Low-bias voltage drift

• Programmable TIA gain 2.75 to 350 kΩ

• Sink and source capability

• I

C-compatible digital interface

• Ambient operating temperature –40°C to +85°C

• Package: 14-pin WSON

• Supported by WEBENCH Sensor AFE Designer

LM4120

• Small SOT23-5 package

• Low dropout voltage: 120 mV Typ @ 1 mA

• High output voltage accuracy: 0.2%

• Source and sink current output: ±5 mA

• Supply current: 160 μA Typ.

• Low temperature coefficient: 50 ppm/°C

• Enable pin

• Fixed output voltages: 1.8, 2.048, 2.5, 3.0, 3.3, 4.096 and 5.0 V

• Industrial temperature range: –40°C to +85°C

TPS61220

• Up to 95% efficiency at typical operating conditions

• 5.5-μ quiescent current

Features SNOA922–April 2013

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