AD7993 Analog Devices, AD7993 Datasheet - Page 10

• Manufacturer Part Number: AD7993
• Description: 4-Channel, 10-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7993

• Resolution (bits): 10bit
• # Chan: 4
• Sample Rate: 188kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP

AD7993/AD7994
PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS
Table 5. Pin Function Descriptions
Pin No.
1, 2, 3, 4, 16
5
6
7
8
9
10
11
12
13
14
15
Table 6. I
Part Number
AD7993-0
AD7993-0
AD7993-1
AD7993-1
AD7993-x
AD7994-0
AD7994-0
AD7994-1
AD7994-1
AD7994-x
1
If the AS pin is left floating on any of the AD7993/AD7994 parts, the device address is 010 0000.
2
1
1
C Address Selection
Mnemonic
AGND
V
REF
V
V
V
V
AS
CONVST
ALERT/BUSY
SDA
SCL
DD
IN
IN
IN
IN
1
3
4
2
IN
Function
Analog Ground. Ground reference point for all circuitry on the AD7993/AD7994. All analog input signals
should be referred to this AGND voltage.
Power Supply Input. The V
Voltage Reference Input. The external reference for the AD7993/AD7994 should be applied to this input pin.
The voltage range for the external reference is 1.2 V to V
between REF
Analog Input 1. Single-ended analog input channel. The input range is 0 V to REF
Analog Input 3. Single-ended analog input channel. The input range is 0 V to REF
Analog Input 4. Single-ended analog input channel. The input range is 0 V to REF
Analog Input 2. Single-ended analog input channel. The input range is 0 V to REF
Logic Input. Address select input that selects one of three I
Table 6. The device address depends on the voltage applied to this pin.
Logic Input Signal/Convert Start Signal. This is an edge-triggered logic input. The rising edge of this signal
powers up the part. The power-up time for the part is 1 µs. The falling edge of CONVST places the track/hold
into hold mode and initiates a conversion. A power-up time of at least 1 µs must be allowed for the CONVST
high pulse; otherwise, the conversion result is invalid (see the Modes of Operation section).
Digital Output, Selectable as an ALERT or BUSY Output Function. When configured as an ALERT, this pin acts
as an out-of-range indicator and, if enabled, becomes active when the conversion result violates the DATA
or DATA
becomes active when a conversion is in progress. Open-drain output.
Digital I/O. Serial bus bidirectional data. Open-drain output. External pull-up resistor required.
Digital Input. Serial bus clock. External pull-up resistor required.
LOW
AS Pin
GND
V
GND
V
Float
GND
V
GND
V
Float
DD
DD
DD
DD
register values. See the Limit Registers section. When configured as a BUSY output, this pin
IN
and AGND. See Figure 22.
AGND
AGND
AGND
AGND
REF
Figure 3. 16-Lead TSSOP Pin Configuration
V
V
V
IN
IN
DD
IN
1
3
DD
1
2
3
4
5
6
7
8
range for the AD7993/AD7994 is from 2.7 V to 5.5 V.
(Not to Scale)
Rev. 0 | Page 10 of 32
AD7993/
AD7994
TOP VIEW
16
15
14
13
12
11
10
9
AGND
SCL
SDA
ALERT/BUSY
CONVST
AS
V
V
IN
IN
2
4
I
010 0001
010 0010
010 0011
010 0100
010 0000
010 0001
010 0010
010 0011
010 0100
010 0000
2
C Address
DD
. A 0.1 µF and 1 µF capacitor should be placed
2
C addresses for the AD7993/AD7994, as shown in
IN
IN
IN
IN
.
.
.
.
HIGH