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LTC1598IG#PBF

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LTC1594/LTC1598
15948fb
The LTC
®
1594/LTC1598 are micropower, 12-bit sampling
A/D converters that feature 4- and 8-channel multiplexers,
respectively. They typically draw only 320μA of supply
current when converting and automatically power down to
a typical supply current of 1nA between conversions. The
LTC1594 is available in a 16-pin SO package and the
LTC1598 is packaged in a 24-pin SSOP. Both operate on
a 5V supply. The 12-bit, switched-capacitor, successive
approximation ADCs include a sample-and-hold.
On-chip serial ports allow efficient data transfer to a wide
range of microprocessors and microcontrollers over three
or four wires. This, coupled with micropower consump-
tion, makes remote location possible and facilitates trans-
mitting data through isolation barriers.
The circuit can be used in ratiometric applications or with
an external reference. The high impedance analog inputs
and the ability to operate with reduced spans (to 1.5V full
scale) allow direct connection to sensors and transducers
in many applications, eliminating the need for gain stages.
4- and 8-Channel,
Micropower Sampling
12-Bit Serial I/O A/D Converters
■
12-Bit Resolution
■
Auto Shutdown to 1nA
■
Low Supply Current: 320μA Typ
■
Guaranteed ±3/4LSB Max DNL
■
Single Supply 5V Operation
(3V Versions Available: LTC1594L/LTC1598L)
■
Multiplexer: 4-Channel MUX (LTC1594)
8-Channel MUX (LTC1598)
■
Separate MUX Output and ADC Input Pins
■
MUX and ADC May Be Controlled Separately
■
Sampling Rate: 16.8ksps
■
I/O Compatible with QSPI, SPI and MICROWIRE
TM
, etc.
■
Small Package: 16-Pin Narrow SO (LTC1594)
24-Pin SSOP (LTC1598)
■
Pen Screen Digitizing
■
Battery-Operated Systems
■
Remote Data Acquisition
■
Isolated Data Acquisition
■
Battery Monitoring
■
Temperature Measurement
24μW, 4-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 5V Supply
Supply Current vs Sample Rate
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
ANALOG
INPUTS
0V TO 5V
RANGE
1k
1μF
1594/98 TA01
OPTIONAL
ADC FILTER
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
20
21
22
23
24
1
2
3
+
–
8-CHANNEL
MUX
8 COM
GND
4, 9
MPU
SERIAL DATA LINK
MICROWIRE AND
SPI COMPATABLE
10
6
5, 14
7
11
CSADC
CSMUX
CLK
D
IN
D
OUT
12
13
NC
NC
12-BIT
SAMPLING
ADC
ADCINMUXOUT
18 17 16 15, 19
1μF
5V
V
REF
V
CC
SAMPLE FREQUENCY (kHz)
0.1
1
SUPPLY CURRENT (μA)
10
100
1000
1 10 100
1594/98 TA02
T
A
= 25°C
V
CC
= 5V
V
REF
= 5V
f
CLK
= 320kHz
2
LTC1594/LTC1598
15948fb
(Notes 1, 2)
Supply Voltage (V
CC
) to GND................................... 12V
Voltage
Analog Reference .................... –0.3V to (V
CC
+ 0.3V)
Analog Inputs .......................... –0.3V to (V
CC
+ 0.3V)
Digital Inputs .........................................–0.3V to 12V
Digital Output .......................... –0.3V to (V
CC
+ 0.3V)
Power Dissipation.............................................. 500mW
Operating Temperature Range
LTC1594CS/LTC1598CG ......................... 0°C to 70°C
LTC1594IS/LTC1598IG ..................... –40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC1594CS
LTC1594IS
ORDER PART
NUMBER
LTC1598CG
LTC1598IG
ORDER PART
NUMBER
T
JMAX
= 150°C, θ
JA
= 110°C/ W
T
JMAX
= 125°C, θ
JA
= 120°C/ W
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage (Note 3) 4.5 5.5 V
f
CLK
Clock Frequency V
CC
= 5V (Note 4) 320 kHz
t
CYC
Total Cycle Time f
CLK
= 320kHz 60 μs
t
hDI
Hold Time, D
IN
After CLK↑ V
CC
= 5V 150 ns
t
suCS
Setup Time CS↓ Before First CLK↑ (See Operating Sequence) V
CC
= 5V 1 μs
t
suDI
Setup Time, D
IN
Stable Before CLK↑ V
CC
= 5V 400 ns
t
WHCLK
CLK High Time V
CC
= 5V 1 μs
t
WLCLK
CLK Low Time V
CC
= 5V 1 μs
t
WHCS
CS High Time Between Data Transfer Cycles f
CLK
= 320kHz 16 μs
t
WLCS
CS Low Time During Data Transfer f
CLK
= 320kHz 44 μs
(Note 5)
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
RECO E DED OPERATI G CO DITIO S
UUUUWW
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CH0
CH1
CH2
CH3
ADCIN
V
REF
COM
GND
V
CC
MUXOUT
D
IN
CSMUX
CLK
V
CC
D
OUT
CSADC
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
G PACKAGE
24-LEAD PLASTIC SSOP
24
23
22
21
20
19
18
17
16
15
14
13
CH5
CH6
CH7
GND
CLK
CSMUX
D
IN
COM
GND
CSADC
D
OUT
NC
CH4
CH3
CH2
CH1
CH0
V
CC
MUXOUT
ADCIN
V
REF
V
CC
CLK
NC
3
LTC1594/LTC1598
15948fb
CONVERTER AND MULTIPLEXER CHARACTERISTICS
UW
U
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 12 Bits
Integral Linearity Error (Note 6) ● ±3 ±3LSB
Differential Linearity Error ● ± 3/4 ±1LSB
Offset Error ● ±3 ±3LSB
Gain Error ● ±8 ±8LSB
REF Input Range (Notes 7, 8) 1.5V to V
CC
+ 0.05V V
Analog Input Range (Notes 7, 8) –0.05V to V
CC
+ 0.05V V
MUX Channel Input Leakage Current Off Channel ● ±200 ±200 nA
MUXOUT Leakage Current Off Channel ● ±200 ±200 nA
ADCIN Input Leakage Current (Note 9) ● ±1 ±1 μA
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 1kHz Input Signal 71 dB
THD Total Harmonic Distortion (Up to 5th Harmonic) 1kHz Input Signal –78 dB
SFDR Spurious-Free Dynamic Range 1kHz Input Signal 80 dB
Peak Harmonic or Spurious Noise 1kHz Input Signal –80 dB
DYNAMIC ACCURACY
UW
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
CC
= 5.25V ● 2.6 V
V
IL
Low Level Input Voltage V
CC
= 4.75V ● 0.8 V
I
IH
High Level Input Current V
IN
= V
CC
● 2.5 μA
I
IL
Low Level Input Current V
IN
= 0V ● –2.5 μA
V
OH
High Level Output Voltage V
CC
= 4.75V, I
O
= –10μA ● 4.0 4.64 V
V
CC
= 4.75V, I
O
= –360A ● 2.4 4.62 V
V
OL
Low Level Output Voltage V
CC
= 4.75V, I
O
= 1.6mA ● 0.4 V
I
OZ
Hi-Z Output Leakage CS = High ● ±3 μA
I
SOURCE
Output Source Current V
OUT
= 0V – 25 mA
I
SINK
Output Sink Current V
OUT
= V
CC
45 mA
R
REF
Reference Input Resistance CS = V
IH
5000 MΩ
CS = V
IL
55 kΩ
I
REF
Reference Current CS = V
CC
● 0.001 2.5 μA
t
CYC
≥ 760μs, f
CLK
≤ 25kHz 90 μA
t
CYC
≥ 60μs, f
CLK
≤ 320kHz ● 90 140 μA
I
CC
Supply Current CS = V
CC
, CLK = V
CC
, D
IN
= V
CC
● 0.001 ±7 μA
t
CYC
≥ 760μs, f
CLK
≤ 25kHz 320 μA
t
CYC
≥ 60μs, f
CLK
≤ 320kHz ● 320 690 μA
(Note 5) f
SMPL
= 16.8kHz
LTC1594CS/LTC1598CG
LTC1594IS/LTC1598IG
The ● denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
The
● denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
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LTC1598IG#PBF

Mfr. #:
Buy LTC1598IG#PBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 8-Ch, uP Smpl 12-B Serial I/O A/D Conv
Lifecycle:
New from this manufacturer.
Delivery:
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