STLC7550TQF7TR STMicroelectronics, STLC7550TQF7TR Datasheet - Page 7

• Manufacturer Part Number: STLC7550TQF7TR
• Description: IC ANALOG FRONT END LV 48-TQFP
• Manufacturer: STMicroelectronics

Specifications of STLC7550TQF7TR

• Number Of Bits: 16
• Number Of Channels: 1
• Power (watts): 30mW
• Voltage - Supply, Analog: 3V
• Voltage - Supply, Digital: 3V
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STLC7550
than two times the sampling frequency (FS), so that the combined frequency response of
both the internal and external filters is flat in the passband. The attenuator of the last output
stage can be programmed to 0dB, 6dB or infinite.
Non-inverting Analog Input (IN+)
This pin is the differential non-inverting ADC input.
Inverting Analog Input (IN-)
This pin is the differential inverting ADC input. These analog inputs (IN+, IN-) are presented
to the Sigma-Delta modulator. The analog input peak-topeak differential signal range must
be less than 2 x V
The cut-off frequency of the filter must be lower than one half the oversampling frequency.
These filters should be set as close as possible to the IN+ and IN- pins. The gain of the first
stage is programmable (see
Non-inverting Auxiliary Analog Input (AUX IN+)
This pin is the differential non-inverting auxiliary ADC input. The characteristics are same as
the IN+ input.
Inverting Auxiliary Analog Input (AUX IN-)
This pin is the differential inverting auxiliary ADC input. The characteristics are same as the
IN- input. The input pair (IN+/IN- or AUX IN+/AUX IN-) are software selectable.
Figure 2.
AUXIN+
AUXIN-
OUT+
OUT-
V
V
IN+
REFP
REFN
V
IN-
CM
29
30
27
28
39
40
19
20
32
AV
Block diagram
31
(0 + 6dB in
diff. input)
DD
0dB/+6dB/
INFINITE
ATTEN.
AGND1
21
REF
, and must be preceded by an external single pole anti-aliasing filter.
AGND2
MUX
33
DAC 1 BIT
First order
differential
switched
capacitor
filter
Table
MODULATOR
ANALOG
XTALOUT
GENERATOR
8
CLOCK
4).
Rev 9
XTALIN
9
MODULATOR
2nd ORDER
DV
5
DD
DGND
6
(0.425 x sampling
(0.425 x sampling
Pins description & Block diagram
LOW-PASS
LOW-PASS
frequency)
frequency)
RESET
41
PWRDWN
17
HC0
16
STLC7550
HC1
15
45
44
43
42
18
7
4
3
MCM
DOUT
DIN
TSTD1
TS
M/S
FS
SCLK
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