EVAL-ADG2128EB Analog Devices Inc, EVAL-ADG2128EB Datasheet
EVAL-ADG2128EB
Specifications of EVAL-ADG2128EB
Related parts for EVAL-ADG2128EB
EVAL-ADG2128EB Summary of contents
Page 1
FEATURES 2 I C-compatible interface 2 3.4 MHz high speed I C option 32-lead LFCSP_VQ (5 mm × 5 mm) Double-buffered input logic Simultaneous update of multiple switches Up to 300 MHz bandwidth Fully specified at dual ±5 V/single +12 ...
Page 2
... Initial Version Load Switch (LDSW)................................................. 18 Readback ..................................................................... 18 Serial Interface................................................................ 19 2 High Speed I C Interface........................................... 19 Serial Bus Address...................................................... 19 Writing to the ADG2128............................................... 20 Input Shift Register .................................................... 20 Write Operation ......................................................... 22 Read Operation .......................................................... 22 Evaluation Board............................................................ 24 Using the ADG2128 Evaluation Board ................... 24 Power Supply .............................................................. 24 Schematics................................................................... 25 Outline Dimensions....................................................... 27 Ordering Guide .......................................................... 27 Rev Page ...
Page 3
SPECIFICATIONS ± 10 GND = 0 V, all specifications Table 1. Parameter +25°C ANALOG SWITCH Analog Signal Range On Resistance ...
Page 4
ADG2128 Parameter +25°C 2 LOGIC INPUTS (SCL, SDA) Input High Voltage, V INH Input Low Voltage, V INL Input Leakage Current, I 0.005 IN Input Hysteresis Input Capacitance LOGIC OUTPUT (SDA) Output Low Voltage ...
Page 5
± 10 −5 V ± 10 Table 2. B Version Parameter +25°C ANALOG SWITCH Analog Signal Range On Resistance Resistance Matching 4.5 ...
Page 6
ADG2128 B Version Parameter +25°C Input Leakage Current, I 0.005 IN Input Hysteresis Input Capacitance LOGIC OUTPUT (SDA) 2 Output Low Voltage Floating State Leakage Current POWER REQUIREMENTS ...
Page 7
I C TIMING SPECIFICATIONS − Table 3. Parameter 1 Conditions f Standard mode SCL Fast mode 2 High speed mode C = ...
Page 8
ADG2128 1 Parameter Conditions t Standard mode 11 Fast mode 2 High speed mode C = 100 pF maximum 400 pF maximum B t Standard mode 11A Fast mode 2 High speed mode C = 100 pF ...
Page 9
ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter Rating GND −0 + GND +0 − ...
Page 10
ADG2128 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 V Negative Power Supply in a Dual-Supply Application. For single-supply applications, this pin should be tied to GND ...
Page 11
TYPICAL PERFORMANCE CHARACTERISTICS 200 T = 25° 10mA 180 DS 160 140 V = –5V 120 +5V DD 100 –5 –4 –3 –2 – ...
Page 12
ADG2128 10mA +85° –40° 0.5 1.0 1.5 2.0 2.5 SOURCE VOLTAGE (V) Figure ...
Page 13
T OFF 200 180 160 V = 12V 140 120 100 –40 – TEMPERATURE (°C) Figure 16. T ...
Page 14
ADG2128 0. + –5V SS 0.30 0.25 0.20 0.15 0.10 0. 0.5 1.0 1.5 2.0 FREQUENCY (MHz) Figure 22. Digital Current (I ) vs. Frequency L 1.8 1.6 1 ...
Page 15
TEST CIRCUITS The test circuits show measurements on one channel for clarity, but the circuit applies to any of the switches in the matrix V1 Figure 25. On Resistance ...
Page 16
ADG2128 V DD 0.1µF NETWORK ANALYZER OUT 50Ω X2 50Ω V DATA X BIT GND V CHANNEL-TO-CHANNEL CROSSTALK = 20 log V Figure 32. Channel-to-Channel Crosstalk V SS 0.1µ 50Ω ...
Page 17
TERMINOLOGY On Resistance ( The series on-channel resistance measured between the X input/output and the Y input/output. On Resistance Match (Δ The channel-to-channel matching of on resistance when channels are operated under identical conditions. On Resistance ...
Page 18
ADG2128 THEORY OF OPERATION The ADG2128 is an analog cross point switch with an array size of 8 × 12. The 12 rows are referred to as the X input/output lines, while the eight columns are referred to as the ...
Page 19
SERIAL INTERFACE 2 The ADG2128 is controlled via an I C-compatible serial bus. The parts are connected to this bus as a slave device (no clock is generated by the switch). 2 HIGH SPEED I C INTERFACE In addition to ...
Page 20
ADG2128 WRITING TO THE ADG2128 INPUT SHIFT REGISTER The input shift register is 24 bits wide. A 3-byte write is necessary when writing to this register and is done under the control of the serial clock input, SCL. The contents ...
Page 21
DB15 DB14 DB13 DATA AX3 AX2 ...
Page 22
ADG2128 WRITE OPERATION When writing to the ADG2128, the user must begin with an address byte and R/ W bit, after which the switch acknowledges that it is prepared to receive data by pulling SDA low. This address byte is ...
Page 23
SCL A2 A1 SDA A0 START ADDRESS BYTE COND BY MASTER SCL SDA START ADDRESS BYTE COND BY MASTER RB7 RB6 RB5 RB4 RB3 RB2 RB1 R/W ACK DATA BYTE BY SWITCH R/W ACK DUMMY READBACK BYTE ...
Page 24
... The evaluation kit includes a populated, tested ADG2128 printed circuit board. The evaluation board interfaces to the USB port can be used as a standalone evaluation board. Software is available with the evaluation board that allows the user to easily program the ADG2128 through the USB port. Schematics of the evaluation board are shown in Figure 36 and Figure 37. The software runs on any PC that has Microsoft® ...
Page 25
... SCHEMATICS Figure 36. EVAL-ADG2128EB Schematic, USB Controller Section Rev Page ADG2128 ...
Page 26
... ADG2128 Figure 37. EVAL-ADG2128EB Schematic, Chip Section Rev Page ...
Page 27
... ADG2128BCPZ-REEL7 1 −40°C to +85°C 1 ADG2128BCPZ-HS-RL7 –40°C to +85°C ADG2128YCPZ-REEL 1 −40°C to +125°C 1 ADG2128YCPZ-REEL7 −40°C to +125°C 1 ADG2128YCPZ-HS-RL7 –40°C to +125°C EVAL-ADG2128EB Pb-free part. 5.00 BSC SQ 0.60 MAX 24 0.50 BSC TOP 4.75 VIEW BSC SQ 0.50 0.40 17 ...
Page 28
ADG2128 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I Rights to use these components system, ...