fs6611 Fortune Semiconductor Corporation, fs6611 Datasheet - Page 4

• Manufacturer Part Number: fs6611
• Description: Energy Metering Ic With Impulse Output
• Manufacturer: Fortune Semiconductor Corporation

Rev. 1.1
6.
2, 4, 19
13, 14
5, 6
7, 8
Pin
10
11
12
1
3
9
Pin Description
V1P, V1N
V2P, V2N
REF
RESET
AGND
S1, S0
Name
DV
AV
SCF
NC
IN/OUT
DD
DD
Digital Power Supply. This pin provides the supply voltage for the digital circuitry in the FS6611. The
The supply should be maintained at 5V ± 5% for specified operation. Every effort should be made to
Analog Inputs for Channel 1 (Current Channel). These inputs are fully differential voltage inputs with
differential input pair. The maximum differential input voltage is ±660mV for specified operation. The
protection circuitry, and an over-voltage of ±6V can also be sustained on these inputs without risk of
value of 2.5V ± 8% and a typical temperature coefficient of 30ppm/℃. An external reference source
This provides the ground reference for the analog circuitry in the FS6611, i.e., ADCs and reference.
minimize power supply ripple and noise at this pin by the use of proper decoupling. This pin should
digital ground plane at one point. A star ground configuration will help to keep noisy digital currents
respect to AGND. Both inputs have internal ESD protection circuitry. An overvoltage of ±6V can be
and the gain selections are outlined in Table
a maximum differential signal level of ±470mV for specified operation. Channel 1 also has a PGA,
Analog Power Supply. This pin provides the supply voltage for the analog circuitry in the FS6611.
Reset Pin for the FS6611. A logic low on this pin will hold the ADCs and digital circuitry in a reset
maximum signal level at these pins is ±1V with respect to AGND. Both inputs have internal ESD
This pin provides access to the on-chip voltage reference. The on-chip reference has a nominal
may also be connected at this pin. In either case, this pin should be decoupled to AGND with a
Select Calibration Frequency. This logic input is used to select the frequency on the calibration
These logic inputs are used to select one of four possible frequencies for the Power to Impulse
This pin should be tied to the analog ground plane of the PCB. The analog ground plane is the
transducers. For good noise suppression, the analog ground plane should only connect to the
Converter. This offers the designer greater flexibility when designing the energy meter. See
supply voltage should be maintained at 5V ± 5% for specified operation. This pin should be
Negative and Positive Inputs for Channel 2 (Voltage Channel). These inputs provide a fully
be decoupled to AGND with a 10µF capacitor in parallel with a ceramic 100nF capacitor.
ground reference for all analog circuitry, e.g., anti-aliasing filters and current and voltage
decoupled with a 10µF capacitor in parallel with a ceramic 100nF capacitor.
condition. Bringing this pin logic low will clear the FS6611 internal registers.
output CF. Table Ⅳ shows how the calibration frequencies are selected.
Selecting a Frequency for an Energy Meter Application section.
sustained on these inputs without risk of permanent damage.
10µF ceramic capacitor and 100nF ceramic capacitor.
away from the analog circuits.
permanent damage.
No Connect
Function
I.
The maximum signal level at these pins is ±1V with
FS6611
4/20