Evm Circuit Configuration; Evm Circuit Configuration; Ths7002 Evaluation Module Block Diagram - Texas Instruments THS7002 User Manual

EVM Circuit Configuration

1.5 EVM Circuit Configuration

The THS7002 EVM design allows evaluation of each section of the THS7002
amplifier IC separately as well as a differential system. Configuration of the
EVM is accomplished through jumpers mounted on the module PCB. Each
jumper is a three-pin header that acts as an SPDT switch when a shunt is
placed across two of the three pins to select either of two signal routes (Figure
1–5).
Figure 1–5. THS7002 Evaluation Module Block Diagram
Preamp A
Input A
THS7002
J6
U1:A
U2
THS4001
Input B
J7
Inverter
1-10
PGA A
JP1
1
2 THS7002
3
U1: B
JP3
U1:C
1 1
–
2 2
THS7002
+
3
3
JP2
Preamp B
Jumper JP1:
J
1–2 — Connects the input of A-channel PGA (U1: B) to the input A
BNC (J6), bypassing the THS7002 A-channel preamplifier (U1:A)
J
2–3 — Connects the input of A-channel PGA (U1: B) to the output of
the A-channel preamplifier (U1:A)
Jumper JP2:
J
1–2 — Connects the inverting input terminal of the B-channel
preamplifier (U1:C) to the signal from JP3 (either the THS4001
inverting amplifier (U2) output or the input B BNC (J7) signal,
depending on the setting of JP3). In order to use this functionality,
components R3, R13, and C9 must be selected and installed on the
EVM by the user
J
2–3 — Connects the noninverting input terminal of the B-channel
preamplifier (U1:C) to the signal from JP3
Jumper JP3:
J
1–2 — Connects the input of the B-channel preamplifier (U1: C) or the
B-channel PGA (U1:D) to the output of the THS4001 inverting
amplifier (U2). This signal is an inverted version of the input A BNC
(J6) signal
J
2–3 — Connects the input of the B-channel preamplifier (U1: C) or the
B-channel PGA (U1:D) to the input B BNC (J7)
1
5 V
2
VH Clamp
15 V
3
JP5
U1: D
1
THS7002
2
3
JP4
PGA B
General Information
PGA A
Output
J9
Preamp A
Output
J5
PGA B
Output
J10
Preamp B
Output
J8