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AS1520 Datasheet(PDF) 1 Page - ams AG

Part # AS1520
Description  10-Bit, Single-Supply, Low-Power, 400/300ksps, 8-Channel A/D Converters
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS1520 Datasheet(HTML) 1 Page - ams AG

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AS1520, AS1521
10-Bit, Single-Supply, Low-Power, 400/300ksps,
8-Channel A/D Converters
Produ ct Brief
www.austriamicrosystems.com
Revision 1.00
1 - 2
1 General Description
The AS1520/AS1521 are low-power, 8/4-channel, 400/
300ksps, 10-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, AS1520; 2.2mA @ 300ksps, AS1521) 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,
AS1520; +2.7 to +3.6V, AS1521). 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.
Figure 1. Block Diagram and Pin Assignments
2 Key Features
!
Single-Supply Operation:
- +4.5 to +5.5V (AS1520)
- +2.7 to +3.6V (AS1521)
!
Sampling Rate:
- 400ksps (AS1520)
- 300ksps (AS1521)
!
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 (AS1520)
- 2.2mA @ 300ksps (AS1521)
- 0.4mA in Reduced-Power Mode
- 0.5µA in Full Power-Down Mode
!
SPI/QSPI/Microwire/TMS320-Compatible
!
20-pin TSSOP Package
3 Applications
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.
AS1520/
AS1521
Control
Logic
Output
Shift
Register
10-Bit
SAR
IN
OUT
REF
Analog
Input
+1.2V
REF
Input Shift
Register
Track/
Hold
17k
Ω
Av
2.05
+2.50V
15
SSTRB
17
CSN
14
DOUT
20
VDD1
19
VDD2
13
GND
18
SCLK
16
DIN
1:8
CH0:CH7
9
COM
12
REFADJ
11
REF
10
VDD3
AS1520/
AS1521
1
CH0
2
CH1
3
CH2
4
CH3
5
CH4
6
CH5
7
CH6
8
CH7
9
COM
10
VDD3
20 VDD1
19 VDD2
18 SCLK
17 CSN
16 DIN
15 SSTRB
14 DOUT
13 GND
12 REFADJ
11 REF


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