TLC320AD50C-I_15 Datasheet, PDF (27/57 Pages) Texas Instruments – SIGMA-DELTA ANALOG INTERFACE CIRCUITS WITH MASTER-SLAVE FUNCTION

ADC input. These input sources are selected by bits D4 and D5 of control register 1. The default condition self-biases
the input since the register default value selects INP and INM as the source for both the ADC and monitor amplifier
input (see Figure 2–16). A simple single-pole antialias filter with low output impedance must be connected to INP and
INM (also AUXP and AUXM, if used).
VINP
VINM
INP
35 kΩ
2.5 V
35 kΩ
INM
Figure 2–16. INP and INM Internal Self-Biased (2.5 V) Circuit
2.9.1 Analog Output
The OUTP and OUTM are differential outputs and can drive a typical 600-Ω load directly. Figure 2–17 shows the circuit
when load is ground referenced.
10 kΩ
OUTM
OUTP
10 kΩ
10 kΩ
10 kΩ
5V
+
_
TLE2062
–5 V
Load
Figure 2–17. Differential Output Drive (Ground Referenced)
OUTP (Solid Line)
4V
(Virtual 0) 2.5 V
1V
OUTM (Dashed Line)
Digital Input Code
(+FS) 0111 1111 1111 1111
(Virtual 0) 0000 0000 0000 0000
(–FS) 1000 0000 0000 0000
Analog Output Voltage
OUT +
OUT –
4V
1V
2.5 V
2.5 V
1V
4V
Figure 2–18. Digital Input Code vs Analog Output Voltage
2–12