Quad, 128 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™)
ISL23348
The ISL23348 is a volatile, low voltage, low noi, low power, 128tap, quad digitally controlled potentiometer (DCP) with an I 2C Bus™ interface. It integrates four DCP cores, wiper
switches and control logic on a monolithic CMOS integrated circuit.
Each digitally controlled potentiometer is implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the ur through the I 2C bus interface. Each potentiometer has an associated
volatile Wiper Register (WRi, i = 0, 1, 2, 3) that can be directly written to and read by the ur. The contents of the WRi
controls the position of the wiper. When powered on, the wiper of each DCP will always commence at mid-scale (64 tap position).
The low voltage, low power consumption, and small package of the ISL23348 make it an ideal choice f
or u in battery operated equipment. In addition, the ISL23348 has a V LOGIC pin allowing down to 1.2V bus operation, independent from the V CC value. This allows for low logic levels to be connected directly to the ISL23348 without passing through a voltage level shifter.
The DCP can be ud as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
Applications
•Power supply margining •Trimming nsor circuits
•Gain adjustment in battery powered instruments •RF power amplifier bias compensation
Features
•Four potentiometers per package •128 resistor taps
•10k Ω, 50k Ω or 100k Ω total resistance
•I 2C rial interface
-
No additional level translator for low bus supply -Three address pins allow up to eight devices per bus •Maximum supply current without rial bus activity (standby)
-5µA @ V CC and V LOGIC = 5V -2µA @ V CC and V LOGIC = 1.7V
•Shutdown mode
-Forces the DCP into an end-to-end open circuit and RWi is connected to RLi internally
-Reduces power consumption by disconnecting the DCP
resistor from the circuit •Power
supply
-V CC = 1.7V to 5.5V analog power supply
-V LOGIC = 1.2V to 5.5V I 2C bus/logic power supply •Wiper resistance: 70Ω typical @ V CC = 3.3V
•Power-on pret to mid-scale (64 tap position)
•Extended industrial temperature range: -40°C to +125°C •20 Ld TSSOP or 20 QFN packages •Pb-free (RoHS compliant)
FIGURE 1.FORWARD AND BACKWARD RESISTANCE vs TAP
POSITION, 10k Ω DCP
FIGURE 2.V REF ADJUSTMENT
02000
4000
6000
800010000
32
64
96
128
TAP POSITION (DECIMAL)
R E S I S T A N C E (Ω)
Block Diagram
Pin Configurations
ISL23348
(20 LD TSSOP)TOP VIEW
ISL23348(20 LD QFN)TOP VIEW
1112131415161718201910
9
87654321RL0RW0V CC RH0
RL1RW1GND RH1V LOGIC
A0RL3RH3RL2RW2RW3RH2SCL SDA A2A1
V L O G I C
RW1SCL
RH2A 0
A 1
R L 0
R W 0
R L 3
A 2
RL2RH0
RW2R W 3
V CC RL1RH1SDA
12345789101514131211
20
191817
6
GND
6RH316Pin Descriptions
TSSOP QFN SYMBOL DESCRIPTION
119RL0DCP0 “low” terminal 220RW0DCP0 wiper
terminal 31V CC Analog power supply. Range 1.7V to 5.5V 42RH0DCP0 “high” terminal 53RL1DCP1 “low” terminal 64RW1DCP1wiper terminal 75RH1DCP1 “high” terminal 86GND Ground pin
97V LOGIC I 2C bus /logic supply. Range 1.2V to 5.5V 10
8
A0
Logic Pin - Hardwire slave address pin for I 2C rial bus.
Range: V LOGIC or GND
119A1
Logic Pin - Hardwire slave address pin for I 2C rial bus.
Range: V LOGIC or GND
1210A2
Logic Pin - Hardwire slave address pin for I 2C rial bus.
Range: V LOGIC or GND
1311SDA Logic Pin - Serial bus data input/open drain output
1412SCL Logic Pin - Serial bus clock input 1513RH2DCP2 “high” terminal 1614RW2DCP2 wiper terminal 1715RL2DCP2 “low” terminal 1816RH3DCP3 “high” terminal 1917RW3DCP3 wiper terminal 20
18
RL3
DCP3 “low” terminal
Ordering Information
PART NUMBER
(Notes 1, 2, 3)PART MARKING RESISTANCE
OPTION
(kΩ)
TEMP RANGE
(°C)
PACKAGE
(Pb-free)
走过冬季PKG.
DWG. #
中秋雨
ISL23348TFVZ 23348 TFVZ100-40 to +12520 Ld TSSOP M20.173
ISL23348UFVZ23348 UFVZ50-40 to +12520 Ld TSSOP M20.173
ISL23348WFVZ23348 WFVZ10-40 to +12520 Ld TSSOP M20.173
ISL23348TFRZ 348T100-40 to +12520 Ld 3x4 QFN L20.3x4
ISL23348UFRZ348U50-40 to +12520 Ld 3x4 QFN L20.3x4
ISL23348WFRZ348W10-40 to +12520 Ld 3x4 QFN L20.3x4
NOTES:
1.Add “-TK” suffix for 1k unit or “-T7A” suffix for 250 unit Tape and Reel options. Plea refer to TB347 for details on reel specifications.
2.The Intersil Pb-free plastic packaged products employ special Pb-free material ts, molding compounds/die attach materials, and 100% matte tin
plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3.For Moisture Sensitivity Level (MSL), plea e device information page for ISL23348. For more information on MSL plea e techbrief TB363.
Absolute Maximum Ratings Thermal Information
Supply Voltage Range
V CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V V LOGIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V Voltage on Any DCP Terminal Pin. . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V Voltage on Any Digital Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V Wiper Current IW (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA ESD Rating
Human Body Model (Tested per JESD22-A114E). . . . . . . . . . . . . . . . 6kV CDM Model (Tested per JESD22-A114E). . . . . . . . . . . . . . . . . . . . . . . 1kV Machine Model (Tested per JESD22-A115-A). . . . . . . . . . . . . . . . . 300V Latch Up (Tested per JESD-78B; Class 2, Level A) . . . . 100mA @ +125°C Thermal Resistance (Typical)θJA(°C/W)θJC(°C/W) 20 Ld TSSOP Package (Notes 4, 6) . . . . . . 8533
20 Ld QFN Package (Notes 5, 7) . . . . . . . . 404 Maximum Junction Temperature (Plastic Package) . .
. . . . . . . . . .+150°C Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e link below /pbfree/Pb-FreeReflow.asp Recommended Operating Conditions Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C V CC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.7V to 5.5V V LOGIC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.2V to 5.5V DCP Terminal Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 to V CC Max Wiper Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3mA
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adverly impact product reliability and result in failures not covered by warranty.
NOTES:
4.θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5.θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
6.For θJC, the “ca temp” location is taken at the package top center.心理学推荐书籍
7.For θJC, the “ca temp” location is the center of the expod metal pad on the package underside.
Analog Specifications V CC = 2.7V to 5.5V, V LOGIC = 1.2V to 5.5V over recommended operating conditions unless otherwi stated. Boldface limits apply over the operating temperature range, -40°C to +125°C.
SYMBOL PARAMETER TEST CONDITIONS
MIN
(Note 20)
TYP
(Note8)
MAX
(Note 20)UNITS
R TOTAL RH to RL Resistance W option10kΩ
U option50kΩ
T option100kΩRH to RL Resistance Tolerance-20±2+20%
End-to-End Temperature Coefficient W option125ppm/°C
U option65ppm/°C
T option45ppm/°C V RH, V RL DCP Terminal Voltage V RH or V RL to GND0V CC V RW Wiper Resistance RH - floating, V RL = 0V, force I W current to the
wiper, I W = (V CC - V RL)/R TOTAL, V CC = 2.7V to 5.5V
70200Ω
V CC = 1.7V580Ω
C H/C L/C W Terminal Capacitance See “DCP Macro Model” on page932/32/32pF
I LkgDCP Leakage on DCP Pins Voltage at pin from GND to V CC-0.4<0.10.4µA
Noi Resistor Noi Density Wiper at middle point, W option16nV/√Hz
Wiper at middle point, U option49nV/√Hz
Wiper at middle point, T option61nV/√Hz Feed Thru Digital Feed-through from Bus to Wiper Wiper at middle point-65dB PSRR Power Supply Reject Ratio Wiper output change if V CC change ±10%;
wiper at middle point
-75dB
VOLTAGE DIVIDER MODE (0V @ RL; V CC @ RH; measured at RW, unloaded)
INL (Note 13)Integral Non-linearity, Guaranteed
Monotonic
W option-0.5±0.15+0.5LSB
(Note 9)
U, T option-0.5±0.15+0.5LSB
(Note 9)
DNL (Note 12)Differential Non-linearity, Guaranteed
Monotonic
W option-0.5±0.15+0.5LSB
(Note 9)
U, T option-0.5±0.15+0.5LSB
(Note 9)
FSerror (Note 11)Full-scale Error W option-3-1.50LSB
(Note 9)
U, T option-1.5-0.90LSB
(Note 9)
ZSerror (Note 10)Zero-scale Error W option0 1.53LSB
(Note 9)
U, T option00.9 1.5LSB
(Note 9)
Vmatch (Note 22)DCP to DCP Matching DCPs at same tap position, same voltage at all
RH terminals, and same voltage at all RL
terminals
-2±0.52LSB
(Note 9)
TC V (Notes 14)Ratiometric Temperature Coefficient W option, Wiper Register t to 40 hex8ppm/°C
U option, Wiper Register t to 40 hex4ppm/°C
T option, Wiper Register t to 40 hex 2.3ppm/°C
t LS_Settling Large Signal Wiper Settling Time From code 0 to 7f hex, measured from 0 to 1
LSB ttling of the wiper
300ns
f cutoff-3dB Cutoff Frequency Wiper at middle point W option1200kHz
Wiper at middle point U option250kHz
Wiper at middle point T option120kHz RHEOSTAT MODE (Measurements between RW and RL pins with RH not connected, or between RW and RH with RL not connected)
R INL (Note 18)Integral Non-linearity, Guaranteed
Monotonic
W option; V CC = 2.7V to 5.5V-1.0±0.5+1.0MI
(Note 15)
荷兰猪怎么洗澡W option; V CC = 1.7V4MI
(Note 15)
U, T option; V CC = 2.7V to 5.5V-0.5±0.15+0.5MI
(Note 15)
U, T option; V CC = 1.7V1MI
(Note 15)
八拜之交是指哪八拜
R DNL (Note 17)Differential Non-linearity, Guaranteed
Monotonic
W option; V CC = 2.7V to 5.5V-0.5±0.15+0.5MI
(Note 15)
W option; V CC = 1.7V±0.4MI
(Note 15)
U, T option; V CC = 2.7V to 5.5V-0.5±0.15+0.5MI
(Note 15)
U, T option; V CC = 1.7V±0.4MI
(Note 15)
SYMBOL PARAMETER TEST CONDITIONS炒饭的做法
MIN
(Note 20)
TYP
(Note8)
MAX
(Note 20)UNITS
R offt (Note 16)Offt, Wiper at 0 Position W option; V CC = 2.7V to 5.5V0 1.83MI
(Note 15)
W option; V CC = 1.7V3MI
(Note 15)
U, T option; V CC = 2.7V to 5.5V00.31MI
(Note 15)
U, T option; V CC = 1.7V0.5MI
(Note 15)
Rmatch (Note 23)DCP to DCP Matching Any two DCPs at the same tap position with
the same terminal voltages
-22LSB
(Note 9)
TCR (Note 19)Resistance Temperature Coefficient W option; Wiper register t between 19 hex
and 7f hex
170ppm/°C
U option; Wiper register t between 19hex
and 7f hex
80ppm/°C
T option; Wiper register t between 19hex
and 7f hex
50ppm/°C
SYMBOL PARAMETER TEST CONDITIONS
MIN
(Note 20)
TYP
(Note8)
MAX
(Note 20)UNITS
Operating Specifications V CC = 2.7V to 5.5V, V LOGIC = 1.2V to 5.5V over recommended operating conditions unless otherwi stated. Boldface limits apply over the operating temperature range, -40°C to +125°C.
SYMBOL PARAMETER TEST CONDITIONS
MIN
(Note 20)
五一新干线
TYP
(Note8)
MAX
(Note 20)UNITS
I LOGIC V LOGIC Supply Current (Write/Read)V LOGIC = 5.5V, V CC = 5.5V,
f SCL = 400 kHz (for I2C active read and write)
200µA
V LOGIC = 1.2V, V CC = 1.7V,
f SCL = 400 kHz (for I2C active read and write)
5µA
I CC V CC Supply Current (Write/Read)V LOGIC = 5.5V, V CC = 5.5V18µA
V LOGIC = 1.2V, V CC = 1.7V10µA I LOGIC SB V LOGIC Standby Current V LOGIC = V CC = 5.5V,
I2C interface in standby
2µA
V LOGIC = 1.2V, V CC = 1.7V,
I2C interface in standby
0.5µA
I CC SB V CC Standby Current V LOGIC = V CC = 5.5V,
I2C interface in standby
3µA
V LOGIC = 1.2V, V CC = 1.7V,
I2C interface in standby
1.5µA
I LOGIC SHDN V LOGIC Shutdown Current V LOGIC = V CC = 5.5V,
I2C interface in standby
2µA
V LOGIC = 1.2V, V CC = 1.7V,
I2C interface in standby
0.5µA
I CC SHDN V CC Shutdown Current V LOGIC = V CC = 5.5V,
I2C interface in standby
演讲口才
3µA
V LOGIC = 1.2V, V CC = 1.7V,
I2C interface in standby
1.5µA
I LkgDig Leakage Current, at Pins A0, A1, A2,
SDA, SCL
Voltage at pin from GND to V LOGIC-0.4<0.10.4µA
