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PDF AS1531 Data sheet ( Hoja de datos )
| Número de pieza | AS1531 | |
| Descripción | 8-Channel A/D Converters | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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AS1530, AS1531
12-Bit, Single-Supply, Low-Power, 400/300ksps,
8-Channel A/D Converters
Data Sheet
1 General Description
2 Key Features
The AS1530/AS1531 are low-power,8/4-channel, 400/
300ksps, 12-bit analog-to-digital (A/D) converters specif-
ically designed to operate with single-supply devices.
Superior AC characteristics, very low power consump-
tion, and highly-reliable packaging make these ultra-
small devices perfect for battery-powered remote-sen-
sor and data-acquisition devices.
The successive-approximation register (SAR), high-
speed sampling, high-bandwidth track/hold circuitry, and
multi-mode operation combine to make these devices
highly-flexible and configurable.
Both devices require low supply current (2.8mA @
400ksps, AS1530; 2.2mA @ 300ksps, AS1531) and fea-
ture a reduced-power mode and a power-down mode to
lower power consumption at slower throughput rates.
The devices operate from a single supply (+4.5 to +5.5V,
AS1530; +2.7 to +3.6V, AS1531). Both devices contain
an internal 2.5V reference, an integrated reference
buffer, and feature support for an external reference (1V
to VDD).
Data accesses are made via the high-speed, 4-wire,
SPI, QSPI-, and Microwire-compatible serial interface.
The devices are available in a 20-pin TSSOP package.
! Single-Supply Operation:
- +4.5 to +5.5V (AS1530)
- +2.7 to +3.6V (AS1531)
! Sampling Rate:
- 400ksps (AS1530)
- 300ksps (AS1531)
! Software-Configurable Analog Input Types:
- 8-Channel Single-Ended
- 8-Channel Pseudo Differential Referenced to COM
- 4-Channel Pseudo Differential
- 4-Channel Fully Differential
! Software-Configurable Input Range
! Internal +2.5V Reference
! Low-Current Operation:
- 2.8mA @ 400ksps (AS1530)
- 2.2mA @ 300ksps (AS1531)
- 0.4mA in Reduced-Power Mode
- 0.5µA in Full Power-Down Mode
! SPI/QSPI/Microwire/TMS320-Compatible
! 20-pin TSSOP Package
3 Applications
Figure 1. Block Diagram and Pin Assignments
The devices are ideal for remote sensors, data-acquisi-
tion and data-logging devices, pen-digitizers, process
control, or any other space-limited A/D application with
low power-consumption requirements.
17
CSN
18
SCLK
16
DIN
1:8
CH0:CH7
9
COM
12
REFADJ
11
REF
Output
Shift
Register
Input Shift
Register
Control
Logic
Analog
Input
AS1530/
AS1531
Track/
Hold
12-Bit
SAR
IN OUT
REF
+1.2V
REF
17kΩ
Av ≈ 2.05
+2.50V
14
DOUT
15
SSTRB
10
VDD3
19
VDD2
20
VDD1
13
GND
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
VDD3 10
AS1530/
AS1531
20 VDD1
19 VDD2
18 SCLK
17 CSN
16 DIN
15 SSTRB
14 DOUT
13 GND
12 REFADJ
11 REF
www.austriamicrosystems.com
Revision 1.02
1 - 29
1 page  
AS1530/AS1531
Data Sheet - Electrical Characteristics
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6 Electrical Characteristics
AS1530 Electrical Characteristics
VDD1 = VDD2 = VDD3 = +4.5 to +5.5V, COM = GND, fSCLK= 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle
(400ksps), external +2.5V at REF, REFADJ = VDD1, TAMB = TMIN to TMAX (unless otherwise specified). Typ values at
TAMB = +25ºC.
Table 3. AS1530 Electrical Characteristics
Symbol
Parameter
Conditions
Min Typ Max Units
DC Accuracy 1
Resolution
12 Bits
INL Relative Accuracy 2
-1 +1 LSB
DNL
Differential Nonlinearity
No missing codes over temperature
-1
+1 LSB
Offset Error
-6 +6 LSB
Gain Error 3
-6 +6 LSB
Gain-Error Temperature
Coefficient
±1.6
ppm/
°C
Channel-to-Channel
Offset Error Matching
±0.2 LSB
Dynamic Specifications: 100kHz sinewave input, 2.5Vp-p, 400ksps, 6.4MHz clock, bit RANGE (page 15) = 0,
pseudo-differential input mode
SINAD
Signal-to-Noise plus
Distortion Ratio
70 dB
THD Total Harmonic Distortion
Up to the 5th harmonic
-82 dB
SFDR
Spurious-Free
Dynamic Range
83 dB
IMD Intermodulation Distortion
fIN1 = 99kHz, fIN2 = 102kHz
76 dB
Channel-to-Channel
Crosstalk 4
fIN = 200kHz, VIN = 2.5Vp-p
-85 dB
Full-Power Bandwidth
-3dB point
6 MHz
Full-Linear Bandwidth
SINAD > 68dB
450 kHz
Conversion Rate
tCONV
Conversion Time 5
2.5 µs
tACQ Track/Hold Acquisition Time
390 ns
tAD Aperture Delay
7 ns
tAJ Aperture Jitter
<50 ps
fSCLK
Serial Clock Frequency
0.5 6.4 MHz
Duty Cycle
40 60 %
Analog Inputs: CH0:CH7, COM
VCHx -
VCHy
(COM)
Input Voltage Range: Single-
Ended, Pseudo-Differential,
and Differential 6
Bit RANGE (page 15) = 1
Bit RANGE (page 15) = 0
0
-VREF
/2
VREF
+VREF
/2
V
Multiplexer Leakage Current On/off leakage current, VCHx = 0 or VDD1
Input Capacitance
-1 ±0.001 +1
18
µA
pF
Internal Reference
VREF
TCVREF
CBYPREF
REF Output Voltage
REF Short-Circuit Current
REF Output Temperature
Coefficient
Load Regulation 7
Capacitive Bypass at REF
TAMB = +25ºC
0 to 1mA output load
2.48 2.50 2.52 V
30 mA
±25
ppm/
°C
1.2
4.0
mV/
mA
4.7 10 µF
www.austriamicrosystems.com
Revision 1.02
5 - 29
5 Page 
AS1530/AS1531
Data Sheet - Typical Operating Characteristics
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7 Typical Operating Characteristics
Same conditions as stated in Electrical Characteristics on page 5.
Figure 5. INL vs. Digital Output Code
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0 1000 2000 3000 4000
Digital Output Code
Figure 6. DNL vs. Digital Output Code
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0 1000 2000 3000 4000
Digital Output Code
Figure 7. FFT @ 10kHz; RANGE = 1, MODE = 1
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
0
20 40 60
FSample = 312.5ksps
NFFT = 16384
80 100 120 140 160
Input Signal Frequency (kHz)
Figure 8. FFT @ 75kHz; RANGE = 0, MODE = 1
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
0
FSample = 312.5ksps
NFFT = 16384
20 40 60 80 100 120 140 160
Input Signal Frequency (kHz)
Figure 9. ENOB vs. VREF; 1st Order 300kHz
Low Pass Filter
11.6
AS1531: fsig = 75kHz
11.4
AS1530: fsig = 100kHz
11.2
11
10.8
10.6
1
2 34
Voltage (V)
5
Figure 10. ENOB vs. Input Signal Frequency; 1st
Order 1MHz Low Pass Filter
11.5
11.45
11.4
11.35
11.3
11.25
11.2
11.15
11.1
11.05
0
50 100 150 200 250 300 350
Frequency (kHz)
www.austriamicrosystems.com
Revision 1.02
11 - 29
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet AS1531.PDF ] | |
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