Datasheet

LMP91200
www.ti.com SNAS571C –JANUARY 2012–REVISED MARCH 2013
PIN DESCRIPTIONS
Pin Name Description
1 VDD Positive Power Supply
2 CAL Connect an external precision resistor here for purpose of temperature
measurement calibration
3 RTD Pt100/Pt1000 input / internal current source output
4 GUARD1 Active guard pin
5 INP Non-inverting analog input of pH buffer
6 GUARD2 Active guard pin
7 VCMHI High Impedance Programmable Common Mode output
8 VCM Buffered Programmable Common Mode output
9 VREF Voltage reference input
10 GND Analog ground
11 VOCM Output common mode voltage
12 VOUT Analog Output
13 SDO_DIAG Serial Data Out /Diagnostic enable
14 CSB Chip select, low active.
15 SCLK Serial Clock
16 SDI Serial Data In
Absolute Maximum Ratings
(1)(2)(3)
Human Body Model 2000V
ESD Tolerance
(4)
Machine Model 150V
Charge Device Model 1000V
Supply Voltage (V
S
= VDD-GND) -0.3V to 6.0V
Voltage between any two pins -0.3V to VDD+0.3V
Current out at any pin 5mA
Storage Temperature Range -65°C to 150°C
Junction Temperature
(5)
+150°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not specified. For ensured specifications and the test
conditions, see the Electrical Characteristics Tables.
(2) For soldering specifications see product folder at www.ti.com and SNOA549
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(4) Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC) Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
(5) The maximum power dissipation is a function of T
J(MAX)
, θ
JA
. The maximum allowable power dissipation at any ambient temperature is
P
D
= (T
J(MAX)
- T
A
)/θ
JA
. All numbers apply for packages soldered directly onto a PC Board.
Operating Ratings
(1)
Supply Voltage (V
S
=VDD-GND) 1.8V to 5.5V
Temperature Range -40°C to 125°C
Package Thermal Resistance (θ
JA
(2)
) 16-Pin TSSOP 31°C/W
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not specified. For ensured specifications and the test
conditions, see the Electrical Characteristics Tables.
(2) The maximum power dissipation is a function of T
J(MAX)
, θ
JA
. The maximum allowable power dissipation at any ambient temperature is
P
D
= (T
J(MAX)
- T
A
)/θ
JA
. All numbers apply for packages soldered directly onto a PC Board.
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