AS1542-BTSU ams, AS1542-BTSU Datasheet - Page 3

• Manufacturer Part Number: AS1542-BTSU
• Description: Analog to Digital Converters - ADC
• Manufacturer: ams

Specifications of AS1542-BTSU

• Rohs: yes
• Number Of Channels: 16/8
• Architecture: SAR
• Conversion Rate: 1 MSPs
• Resolution: 12 bit
• Input Type: Single-Ended/Differential
• Snr: 71 dB
• Interface Type: QSPI, SPI
• Operating Supply Voltage: 2.7 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-28
• Maximum Power Dissipation: 18.4 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1

AS1542
Data Sheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
Pin Descriptions
Table 1. Pin Descriptions
www.austriamicrosystems.com
(see Figure 2)
Pin Number Pin Name
REFIN
V
DOUT
AGND
DGND
SCLK
GND
CSN
V
V
DRIVE
DIN
IN
DD
x
Analog Inputs 0:15. Sixteen single-ended or eight fully-differential analog input channels
that are multiplexed into the track-and-hold circuitry. Input channels are selected by using
address bits
conjunction with bits
to be programmed. The bit
or fully-differential conversion mode. In case of single-ended mode the input range can
extend from [0V to V
differential input range can extend from [-V
Note: Unused inputs should be connected to AGND to avoid noise.
Reference Input. An external reference must be applied to this input. The voltage range
for the external reference is 2.5V ±1% for specified performance.
Serial Clock. Provides the serial clock for accessing data from the part. This clock input is
also used as the clock source for the ADC conversion process
2.7 to 5.25V Supply Input. For the [0V to 2 x V
and 5.25V
Logic Power Supply Input. The voltage supplied at this pin determines the operating
voltage of the AS1542 serial interface. V
Digital Output. The ADC conversion result is provided serially on this output. Data bits are
clocked out on the falling edge of SCLK. The data stream consists of four address bits
indicating the corresponding conversion channel, followed by 12 bits of conversion data
(MSB first). Output coding may be selected as straight binary or two’s complement
depending on the setting of bit
Digital Input. Data is clocked into to the AS1542 control register on this input
Register on page
Chip Select. Active low input. Initiates conversions and also is used to frame the serial
data transfer.
Analog Ground. Ground reference point for all analog circuitry. All analog input signals
and any external reference signal should be referenced to pin AGND.
Note: AGND, GND and DGND pins must be connected together.
Digital Logic Ground. Ground reference point for the V
V
Supply Ground. Ground reference point for the V
should be decoupled to pin GND.
DRIVE
should be decoupled to pin DGND.
ADDR3:ADDR0 (page 14)
14).
SEQ (page 14)
REFIN
Revision 1.00
] or [0V to 2 x V
AS1542
SE/FDN (page 14)
CODING (page
and
Description
of the control register. The address bits in
DRIVE
SHADOW (page 14)
REFIN
REFIN
≤ V
of the control register selects single-ended
]. In case of fully-differential mode the
14).
REFIN
/2 to +V
DD
DD
] range, V
required.
supply input. The supply input V
REFIN
DRIVE
/2] or [-V
allow the sequence register
logic power supply input.
DD
must be between 4.75
REFIN
to +V
(see Control
REFIN
3 - 29
DD
].