SX8724E082TRT Semtech, SX8724E082TRT Datasheet - Page 16

• Manufacturer Part Number: SX8724E082TRT
• Description: IC DAS PRESSURE/TEMP SENS 16MLPQ
• Manufacturer: Semtech
• Series: ZoomingADC™r
• Type: Pressure/Temperature Sensorr

Specifications of SX8724E082TRT

• Input Type: Differential
• Output Type: Digital
• Interface: 2-Wire
• Mounting Type: Surface Mount
• Package / Case: 16-MLPQ
• For Use With: XE8000EV121 - BOARD EVAL FOR SX8723/24
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: SX8724E082TR

ADVANCED COMMUNICATIONS & SENSING
stages 1 to 3. Fine gain programming up to 1'000 V/V is possible. In addition, the last two stages provide
programmable offset. Each amplifier can be bypassed if needed.
The output of the PGA stages is directly fed to the analog-to-digital converter (ADC), which converts the signal
V
Like most ADCs intended for instrumentation or sensing applications, the ZoomingADC is an over-sampled
converter (See Note
both positive and negative differential input voltages). In first approximation, the ADC output result relative to
full-scale (FS) delivers the quantity:
in two's complement (see Equation 4 and Equation 5 for details). The output code OUT
V
relationship:
where GD
1 Note: Over-sampled converters are operated with a sampling frequency f
20-1'000 times the input signal bandwidth). The sampling frequency to throughput ratio is large (typically 10-500). These converters include
digital decimation filtering. They are mainly used for high resolution, and/or low-to-medium speed applications.
V1.23 © 2009 Semtech Corp.
IN,ADC
IN,ADC
into digital.
-V
TOT
REF,ADC
is the total PGA gain, and GDoff
/2 to +V
1
). The ADC is a so-called incremental converter; with bipolar operation (the ADC accepts
REF,ADC
V
IN
/2 respectively. As will be shown, V
,
ADC
GD
ZoomingADC™ for Pressure and Temperature Sensing
OUT
TOT
F
TOT
S
V
2 /
ADC
is the total PGA offset.
Equation 1
Equation 2
IN
16
GDoff
V
REF
V
IN
,
S
ADC
,
TOT
much higher than the input signal's Nyquist rate (typically f
ADC
2 /
V
REF
IN,ADC
,
ADC
is related to input voltage V
(V)
ADC
is -FS/2 to +FS/2 for
www.semtech.com
SX8724
IN
by the
S
is