X9430 Datasheet, PDF (3/21 Pages) Xicor Inc. – Dual Digitally Controlled Potentiometer (XDCP™) with Operational Amplifier

X9430 – Preliminary Information
PIN CONFIGURATION
V_CC
R_L0
R_H0
R_W0
CS
WP
SI
A1
R_L1
R_H1
R_W1
V_SS
SOIC
1
24
2
23
3
22
4
21
5
20
6
19
7 ^X9430 ₁₈
8
17
9
16
10
15
11
14
12
13
V+
V_OUT0
V_NI0
V_INV0
A0
S0
HOLD
SCK
V_INV1
V_NI1
V_OUT1
V-
SO
A₀
V_INV0
V_NI0
V_OUT0
V+
V_CC
R_L0
R_H0
R_W0
CS
WP
TSSOP
1
24
2
23
3
22
4
21
5
20
6
19
7
X9430
18
8
17
9
16
10
15
11
14
12
13
HOLD
SCK
V_INV1
V_NI1
V_OUT1
V-
V_SS
R_W1
R_H1
R_L1
A₁
SI
PIN NAMES
Symbol
SCK
SI
SO
A0-A1
CS
HOLD
R_H0–R_H1, R_L0–R_L1
R_W0–R_W1
V_NI(0,1), V_INV(0,1)
V_OUT0, V_OUT1
WP
V+,V-
V_CC
V_SS
Description
Serial Clock
Serial Input
Serial Output
Device Address
Chip Select
Hold
Potentiometers (terminal
equivalent)
Potentiometers (wiper
equivalent)
Amplifier Input Voltages
Amplifier Outputs
Hardware Write Protection
Analog and Voltage Amplifier
Supplies
System/Digital Supply Voltage
System Ground
PRINCIPLES OF OPERATION
The X9430 is an integrated microcircuit incorporating two
digitally controlled potentiometers, two operational
amplifiers and their associated registers and counters;
and the serial interface logic providing direct communica-
tion between the host and the digitally controlled
potentiometers.
Serial Interface
The X9430 supports the SPI interface hardware con-
ventions. The device is accessed via the SI input with
data clocked in on the rising edge of SCK. CS must be
LOW and the HOLD and WP pins must be HIGH dur-
ing the entire operation.
REV 1.0 6/20/00
www.xicor.com
Characteristics subject to change without notice. 3 of 21