AD7416-7418 Analog Devices, AD7416-7418 Datasheet - Page 4

• Manufacturer Part Number: AD7416-7418
• Description: 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
• Manufacturer: Analog Devices

AD7416/AD7417/AD7418
Pin No.
1, 16
2
3
4
5
6
7–10
11
12
13
14
15
Mnemonic
NC
SDA
SCL
OTI
REF
GND
A
A2
A1
A0
V
CONVST
IN1
DD
IN
to A
IN4
Description
No Connection. Do not connect anything to this pin.
Digital I/O. Serial Bus Bidirectional Data. Push-pull output.
Digital Input. Serial Bus Clock.
This is a logic output. The Over Temperature Indicator (OTI) is set if the result of a conversion on
Channel 0 (temperature sensor) is greater than an 8-bit word in the Over Temperature Register (OTR).
The signal is reset at the end of a serial read operation. Open-drain output.
Reference Input. An external 2.5 V reference can be connected to the AD7417 at this pin. To enable
the on-chip reference the REF
the AD7417, the internal reference will shut down.
Ground Reference for Track/Hold, Comparator and Capacitor DAC, and Digital Circuitry.
Analog Input Channels. The AD7417 has four analog input channels. The input channels are single-
ended with respect to GND. The input channels can convert voltage signals in the range 0 V to V
A channel is selected by writing to the configuration register of the AD7417. (See Control Byte section.)
Digital Input. The highest programmable bit of the Serial Bus Address.
Digital Input. The middle programmable bit of the Serial Bus Address.
Digital Input. The lowest programmable bit of the Serial Bus Address.
Positive Supply Voltage, +2.7 V to +5.5 V.
Logic Input Signal. Convert Start Signal. The rising edge of this signal fully powers up the part. The
power-up time for the part is 4 s. If the CONVST pulse is greater than 4 s, the falling edge of
CONVST places the track/hold mode into hold mode and initiates a conversion. If the pulse is less
than 4 s, an internal timer ensures that the track/hold does not go into hold and conversion is not
initiated until the power-up time has elapsed. The track/hold goes into track mode again at the end of
conversion. (See Operating Mode section.)
AD7417 PIN FUNCTION DESCRIPTION
AD7417 PIN CONFIGURATION
REF
GND
SDA
SCL
A
A
OTI
NC
IN1
IN2
IN
NC = NO CONNECT
SOIC/TSSOP
1
2
3
4
5
6
7
8
IN
(Not to Scale)
TOP VIEW
AD7417
pin should be tied to GND. If an external reference is connected to
–4–
16
15
14
13
12
11
10
9
NC
CONVST
V
A0
A1
A2
A
A
DD
IN4
IN3
REV. B
REF
.