TDC1011_15 Datasheet, PDF (3/49 Pages) Texas Instruments – TDC1011 Single Channel Ultrasonic Sensing Analog Front End (AFE) for Level Sensing,Concentration Sensing Applications

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5 Pin Configuration and Functions
TSSOP
(PW) 28 Pin
Top View
NC 1
RX 2
VCOM 3
LNAOUT 4
PGAIN 5
PGAOUT 6
COMPIN 7
RTD1 8
RTD2 9
RREF 10
RES 11
ERRB 12
START 13
STOP 14
28 TX
27 NC
26 GND
25 CLKIN
24 VDD
23 VDD
22 VIO
21 SDO
20 SDI
19 CSB
18 SCLK
17 RESET
16 TRIGGER
15 EN
TDC1011
SNAS662 – JULY 2015
PIN
NAME
NC
RX
VCOM
LNAOUT
PGAIN
PGAOUT
COMPIN
RTD1
RTD2
RREF
RES
ERRB
START
STOP
EN
TRIGGER
RESET
SCLK
CSB
SDI
SDO
VIO
VDD
CLKIN
GND
NC
TX
Pin Functions
TYPE ⁽¹⁾
NO.
DESCRIPTION
1
No Connect (leave floating)
2
I Receive input
3
P Output common mode voltage bias
4
O Low noise amplifier output (for ac decoupling capacitor)
5
I Programmable gain amplifier input
6
O Programmable gain amplifier output
7
I Echo qualification and zero-crossing detector input
8
O Resistance temperature detector channel 1
9
O Resistance temperature detector channel 2
10
O Reference resistor for temperature measurement
11
I Reserved (connect to GND)
12
O Error flag (open drain)
13
O Start pulse output
14
O Stop pulse output
15
I Enable (active high; when low the TDC1011 is in SLEEP mode)
16
I Trigger input
17
I Reset (active high)
18
I Serial clock for the SPI interface
19
I Chip select for the SPI interface (active low)
20
I Serial data input for the SPI interface
21
O Serial data output for the SPI interface
22
P Positive I/O supply
23, 24 P Positive supply; all VDD supply pins must be connected to the supply. Place a 100-nF bypass capacitor
to ground in close proximity to the pin.
25
I Clock input
26
G Negative supply
27
No Connect (leave floating)
28
O Transmit output
(1) G = Ground, I = Input, O = Output, P = Power
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