| TERMINAL PIN NO. NAME | lO | DESCRIPTION |
| 1 | VIN+ | Input | Noninverting Analog Input |
| 2 | VIN- | Input | Inverting Analog Input |
| 3 | AGND | Ground | Analog Ground |
| 4 | VCC | Power | Analog Supply, +5V |
| 5 | RATE | Input | Sampling Mode Configuration (Tri-Level Input): 0 = Double Speed; 1 = Normal Speed, Low Power; Z = Normal Speed, High Performance. Maximum external capacitive load is l OOpF. |
| 6 | S/M | Input | Audio Serial Port Slave/Master Mode (0 = Master, 1 = Slave) |
| 7 | RST | Input | Reset/Power Down (Active Low) |
| 8 | HPFD | Input | High Pass Filter Disable (Active High) |
| 9 | DATA | Output | Audio Serial Port Data |
| 10 | FSYNC | 1/0 | Audio Serial Port Frame Synchronization Clock |
| 11 | BCK | 1/0 | Audio Serial Port Bit (or Data) Clock |
| 12 | SCKI | Input | System Clock |
| 13 | VDD | Power | Digital Supply, +3.3V Typical(l) |
| 14 | DGND | Ground | Digital Ground |
| 15 | VREF- | Output | Voltage Reference Low Output, Connect to AGND |
| 16 | VREF+ | Output | Voltage Reference High Output, De-Coupling Only(2) |
| | | |
| | | | TYPICAL | |
| SYMBOL | PARAMETER | CONDITIONS | HC | HCT | UNIT |
| tPZL/ tPLZ | propagation delay | CL = 15 pF; RL = 1 kl ; Vcc = 5V | 8 | 10 | ns |
| Cl | input capacitance | | 3.5 | 3.5 | pF |
| CPD | power dissipation capacitance per gate | notes l, 2 and 3 | 4.0 | 4.0 | pF |
| | | | | |
The LIA120 0ptically Isolated Reference Amplifier combines Clare's linear optical coupler technology with an industry standard 431 type precision programmable shunt regulator to provide very linear high gain with excellent temperature stability for a total gain error of less than 2dB. By using optical feedback, the LIA120 essentially eliminates temperature and gain variations due to current transfer ratio (CTR) changes in optocouplers while increasing the bandwidth up t0 10X and easing engineering design constraints.
