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LTC1598LIG#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
1
LTC1594L/LTC1598L
15948lfb
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATION
U
The LTC
®
1594L/LTC1598L are 3V micropower, 12-bit
sampling A/D converters that feature 4- and 8-channel
multiplexers, respectively. They typically draw only 160µA
of supply current when converting and automatically
power down to a typical supply current of 1nA between
conversions. The LTC1594L is available in a 16-pin SO
package and the LTC1598L is packaged in a 24-pin
SSOP. Both operate on a 3V 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,
3V Micropower Sampling
12-Bit Serial I/O A/D Converters
■
12-Bit Resolution on 3V Supply
■
Low Supply Current: 160µA Typ
■
Auto Shutdown to 1nA
■
Guaranteed ±3/4LSB Max DNL
■
Guaranteed 2.7V Operation
(5V Versions Available: LTC1594/LTC1598)
■
Multiplexer: 4-Channel MUX (LTC1594L)
8-Channel MUX (LTC1598L)
■
Separate MUX Output and ADC Input Pins
■
MUX and ADC May Be Controlled Separately
■
Sampling Rate: 10.5ksps
■
I/O Compatible with QSPI, SPI and MICROWIRE
TM
, etc.
■
Small Package: 16-Pin Narrow SO (LTC1594L)
24-Pin SSOP (LTC1598L)
■
Pen Screen Digitizing
■
Battery-Operated Systems
■
Remote Data Acquisition
■
Isolated Data Acquisition
■
Battery Monitoring
■
Temperature Measurement
MICROWIRE is a trademark of National Semiconductor Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
SAMPLE FREQUENCY (kHz)
0.1
1
SUPPLY CURRENT (µA)
10
100
1000
1 10 100
1594L/98L TA02
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
CLK
= 200kHz
Supply Current vs Sample Rate
12µW, 8-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 3V Supply
ANALOG
INPUTS
0V TO 3V
RANGE
1k
1µF
OPTIONAL
ADC FILTER
20
21
22
23
24
1
2
3
8
4, 9
MPU
SERIAL DATA LINK
MICROWIRE AND
SPI COMPATABLE
10
6
5, 14
7
11
12
13
18 17 16 15, 19
1µF
3V
1594L/98L TA01
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
GND
CSADC
CSMUX
CLK
D
IN
D
OUT
NC
NC
ADCIN
LTC1598L
MUXOUT
V
REF
V
CC
+
–
12-BIT
SAMPLING
ADC
8-CHANNEL
MUX
2
LTC1594L/LTC1598L
15948lfb
(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)
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Power Dissipation.............................................. 500mW
Operating Temperature Range
LTC1594LCS/LTC1598LCG ..................... 0°C to 70°C
LTC1594LIS/LTC1598LIG ................. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
W
UU
Consult factory for Military grade parts.
ORDER PART
NUMBER
ORDER PART
NUMBER
T
JMAX
= 150°C, θ
JA
= 110°C/ W
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
T
JMAX
= 125°C, θ
JA
= 120°C/ W
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
RECOM ENDED OPERATING CONDITIONS
UU
UU
WW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage (Note 3) 2.7 3.6 V
f
CLK
Clock Frequency V
CC
= 2.7V (Note 4) 200 kHz
t
CYC
Total Cycle Time f
CLK
= 200kHz 95 µs
t
hDI
Hold Time, D
IN
After CLK↑ V
CC
= 2.7V 450 ns
t
suCS
Setup Time CS↓ Before First CLK↑ (See Operating Sequence) V
CC
= 2.7V 2 µs
t
suDI
Setup Time, D
IN
Stable Before CLK↑ V
CC
= 2.7V 600 ns
t
WHCLK
CLK High Time V
CC
= 2.7V 1.5 µs
t
WLCLK
CLK Low Time V
CC
= 2.7V 1.5 µs
t
WHCS
CS High Time Between Data Transfer Cycles f
CLK
= 200kHz 25 µs
t
WLCS
CS Low Time During Data Transfer f
CLK
= 200kHz 70 µs
LTC1594LCS
LTC1594LIS
LTC1598LCG
LTC1598LIG
The ● denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
3
LTC1594L/LTC1598L
15948lfb
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 ±3 LSB
Differential Linearity Error ● ±3/4 ±1 LSB
Offset Error ● ±3 ±3 LSB
Gain Error ● ±8 ±8 LSB
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 68 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
= 3.6V ● 2.0 V
V
IL
Low Level Input Voltage V
CC
= 2.7V ● 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
= 2.7V, I
O
= 10µA ● 2.4 2.64 V
V
CC
= 2.7V, I
O
= 360µA ● 2.1 2.30 V
V
OL
Low Level Output Voltage V
CC
= 2.7V, I
O
= 400µA ● 0.4 V
I
OZ
Hi-Z Output Leakage CS = High ● ±3 µA
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
CC
15 mA
R
REF
Reference Input Resistance CS = V
IH
2700 MΩ
CS = V
IL
60 kΩ
I
REF
Reference Current CS = V
CC
● 0.001 2.5 µA
t
CYC
≥ 760µs, f
CLK
≤ 25kHz 50 µA
t
CYC
≥ 60µs, f
CLK
≤ 200kHz ● 50 70 µA
I
CC
Supply Current CS = V
CC
, CLK = V
CC
, D
IN
= V
CC
● 0.001 ±5 µA
t
CYC
≥ 760µs, f
CLK
≤ 25kHz 160 µA
t
CYC
≥ 60µs, f
CLK
≤ 200kHz ● 160 400 µA
LTC1594LCS/LTC1598LCG LTC1594LIS/LTC1598LIG
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)
T
A
= 25°C, f
SMPL
= 10.5kHz. (Note 5)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC1598LIG#TRPBF

Mfr. #:
Buy LTC1598LIG#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 12-Bit 8/Ch Low Pwr ADC 3V
Lifecycle:
New from this manufacturer.
Delivery:
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