Data Sheet

Table 9: Package Dimensions: 209mil SSOP

Inches

Millimeters

Dm

Min.

Max.

Min.

Max.

A

0.068

0.078

1.73

2.00

A1

0.002

.20

0.05

A2

0.065

0.073

1.65`

1.85

b

0.009

0.015

0.22

0.38

D

0.271

0.295

6.90

7.5

E

0.291

0.323

7.40

0.820

E1

0.197

0.221

5.00

0.560

e

0.026 BSC

0.65 BSC

8.0 Pin Descriptions

8.1 RX1, RX2, RF Inputs

RX1 and RX2 are RF antenna inputs to the AMIS-52100. The internal circuit designs are identical between these inputs. The AMIS-

52100 receiver inputs, RX1 and RX2, require external components to match the low noise amplifier (LNA) to external devices such as

antennas. The external components must provide a DC voltage path to the RF ground. Figure 3 suggests an external circuit for the

receiver inputs at 403MHz. Each circuit’s input impedance can be trimmed internally to compensate for device manufacture and

external component tolerances. The circuits employ an LNA, internal filters, a low frequency, intermediate frequency (IF), and an

received signal strength indication (RSSI) circuit to recover the ASK/OOK modulated data. The signals in the two input channels are

“summed” before the data recovery circuit.

The functions of the receive circuits are controlled by writing to the registers shown in Table 10.

Table 10: Receiver Control Register Description

RX1 or RX2 Receiver Register Control

Register (HEX)

Name

Bits

States

Comments

0x00

ANT1 Trim

All

Inverse relationship register value to internal capacitance

0x01

ANT2 Trim

All

Inverse relationship register value to internal capacitance

0

Antenna port is off

ANT1 Enable

0

1

Antenna port is on

0

Antenna port is off

0x0c

ANT2 Enable

1

1

Antenna port is on

Figure 3: Typical Input Impedance Match to 50Ω (402MHz)

6

AMI Semiconductor – Rev 4.0, Mar. 06 – M-20535-004

www.amis.com