Datasheet

AD7606/AD7606-6/AD7606-4 Data Sheet
Rev. C | Page 16 of 36
Pin No. Type
1
Mnemonic
Description AD7606 AD7606-6 AD7606-4
42 REF REFIN/
REFOUT
REFIN/
REFOUT
REFIN/
REFOUT
Reference Input (REFIN)/Reference Output (REFOUT). The on-chip reference
of 2.5 V is available on this pin for external use if the REF SELECT pin is set to
logic high. Alternatively, the internal reference can be disabled by setting
the REF SELECT pin to
logic low, and an external reference of 2.5 V can be
applied to this input (see the Internal/External Reference section).
Decoupling is required on this pin for both the internal and external
reference options. A 10 μF capacitor should be applied from this pin to
ground close to the REFGND pins.
43, 46 REF REFGND REFGND REFGND Reference Ground Pins. These pins should be connected to AGND.
44, 45 REF REFCAPA,
REFCAPB
REFCAPA,
REFCAPB
REFCAPA,
REFCAPB
Reference Buffer Output Force/Sense Pins. These pins must be connected
together and decoupled to AGND using a low ESR, 10 μF ceramic capacitor.
The voltage on these pins is typically 4.5 V.
49 AI V1 V1 V1 Analog Input. This pin is a single-ended analog input. The analog input
range of this channel is determined by the RANGE pin.
50, 52 AI GND V1GND,
V2GND
V1GND,
V2GND
V1GND,
V2GND
Analog Input Ground Pins. These pins correspond to Analog Input Pin V1
and Analog Input Pin V2. All analog input AGND pins should connect to
the AGND plane of a system.
51 AI V2 V2 V2 Analog Input. This pin is a single-ended analog input. The analog input
range of this channel is determined by the RANGE pin.
53 AI/GND V3 V3 AGND Analog Input 3. For the AD7606-4, this is an AGND pin.
54 AI GND/
GND
V3GND V3GND AGND Analog Input Ground Pin. For the AD7606-4, this is an AGND pin.
55 AI/GND V4 AGND AGND Analog Input 4. For the AD7606-6 and the AD7606-4, this is an AGND pin.
56 AI GND/
GND
V4GND AGND AGND Analog Input Ground Pin. For the AD7606-6 and AD7606-4, this is an
AGND pin.
57 AI V5 V4 V3 Analog Inputs. These pins are single-ended analog inputs. The analog
input range of these channels is determined by the RANGE pin.
58 AI GND V5GND V4GND V3GND Analog Input Ground Pins. All analog input AGND pins should connect to
the AGND plane of a system.
59 AI V6 V5 V4 Analog Inputs. These pins are single-ended analog inputs.
60 AI GND V6GND V5GND V4GND Analog Input Ground Pins. All analog input AGND pins should connect to
the AGND plane of a system.
61
AI/GND
V7
V6
AGND
Analog Input Pins. For the AD7606-4, this is an AGND pin.
62 AI GND/
GND
V7GND V6GND AGND Analog Input Ground Pins. For the AD7606-4, this is an AGND pin.
63 AI/GND V8 AGND AGND Analog Input Pin. For the AD7606-4 and AD7606-6, this is an AGND pin.
64 AI GND/
GND
V8GND AGND AGND Analog Input Ground Pin. For the AD7606-4 and AD7606-6, this is an
AGND pin.
1
P is power supply, DI is digital input, DO is digital output, REF is reference input/output, AI is analog input, GND is ground.