ADN8830
PIN FUNCTION DESCRIPTIONS
Description
Pin No.
Mnemonic
Type
1
2
3
4
5
THERMFAULT
THERMIN
SD
Digital Output
Analog Input
Digital Input
Analog Input
Digital Output
Indicates an Open or Short-Circuit Condition from Thermistor.
Thermistor Feedback Input.
Puts Device into Low Current Shutdown Mode. Active low.
Target Temperature Input.
TEMPSET
TEMPLOCK
Indicates when Thermistor Temperature is within 0.1°C of Target Tem-
perature as Set by TEMPSET Voltage.
6
NC
No Connection, except as Noted in the Application Notes Section.
2.5 V Reference Voltage.
7
VREF
AVDD
OUT B
N2
Analog Output
Power
8
Power for Nondriver Sections. 3.0 V min; 5.5 V max.
Linear Output Feedback. Will typically connect to TEC+ pin of TEC.
Drives Linear Output External NMOS Gate.
9
Analog Input
Analog Output
Analog Output
Analog Output
10
11
12
P2
Drives Linear Output External PMOS Gate.
TEMPCTL
Output of Error Amplifier. Connects to COMPFB through feedforward
section of compensation network.
13
14
COMPFB
Analog Input
Feedback Summing Node of Compensation Amplifier. Connects to
TEMPCTL and COMPOUT through compensation network.
COMPOUT
Analog Output
Output of Compensation Amplifier. Connects to COMPFB through feed-
back section of compensation network.
15
16
VLIM
VTEC
Analog Input
Sets Maximum Voltage across TEC.
Analog Output
Indicates Relative Voltage across the TEC. The 1.5 V corresponds to 0 V
across TEC. The 3.0 V indicates maximum output voltage, maximum heat
transfer through TEC.
17
18
COMPSWOUT
COMPSWIN
Analog Output
Analog Input
Compensation for Switching Amplifier.
Compensation for Switching Amplifier. Capacitor connected between
COMPSWIN and COMPSWOUT.
19
20
21
22
23
OUT A
PVDD
P1
Analog Input
Power
PWM Output Feedback. Will typically connect to TEC– pin of TEC.
Power for Output Driver Sections. 3.0 V min; 5.5 V max.
Drives PWM Output External PMOS Gate.
Digital Output
Digital Output
Ground
N1
Drives PWM Output External NMOS Gate.
PGND
Power Ground. External NMOS devices connect to PGND. Can be
connected to digital ground as noise sensitivity at this node is not critical.
24
25
26
27
28
COMPOSC
SYNCIN
Analog Input
Digital Input
Analog Input
Analog Input
Digital Output
Connect as Indicated in the Application Notes Section.
Optional Clock Input. If not connected, clock frequency set by FREQ pin.
Sets Switching Frequency.
FREQ
SOFTSTART
SYNCOUT
Controls Initialization Time for ADN8830 with Capacitor to Ground.
Phase Adjusted Clock Output. Phase set from PHASE pin. Can be used to
drive SYNCIN of other ADN8830 devices.
29
30
31
32
PHASE
AGND
TEMPOUT
NC
Analog Input
Ground
Sets Switching and SYNCOUT Clock Phase Relative to SYNCIN Clock.
Analog Ground. Should be low noise for highest accuracy.
Indication of Thermistor Temperature.
Analog Output
No Connection.
EP
Exposed Pad
The exposed pad on the bottom of the package must be connected to VCC or the
GND plane.
D
REV.
–4–
ADI [ ADI ]
