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Example Circuit Sizing Information:

These are all example circuits from the 700 Series Design Manual. If you want to see the actual circuit, download the Design Manual or download the SIMetrix libraries (if you have SIMetrix installed). Example functions are also available (these are typically more complete circuits). A spreadsheet is available from DEI for sizing an array (send an email to request the circuit sizer).

#	Function	Description	NPNP	LNPN	LPNP	R	Base Resistance (Ohms)	Ibias	RBP	REP	Jcaps
E1	Buffer	0	7			60	45000
E2	Capacitance Nuetralization	0	4			40	30000	200 uA
E3	Darlington Pair	NPN with Base Pinch for charge bleed.	2			0	0		1
E4	PNP/ NPN Combination Pair	0	2			0	0		1
E5	Widlar Current Source	0	2			0	0	100 uA
E6	Widlar Current Source	Improved Widlar	2			6	4500	100 uA
E7	Widlar Current Source	More improvements to Widlar	3			0	0	100 uA
E8	Wilson Current Mirror	0	3			0	0	100 uA
E9	Widlar Current Source	With PNP	3			0	0	100 uA
E10	Widlar Current Source	Cascode	4			20	15000	100 uA
E11	Widlar Current Source	Improved Cascode	4			0	0	100 uA
E12	Widlar Current Source	Alternate Improved Cascode	4			0	0	100 uA
E13	Widlar Current Source	More Improvements to Cascode	4			0	0	100 uA
E15	Widlar Current Source	PNP	1			0	0	50 uA
E16	Widlar Current Source	Improved PNP	2			20	15000	50 uA
E17	Widlar Current Source	PNP Equivalent of E7	2			0	0	50 uA	1
E18	Widlar Current Source	PNP with high output impedance	2			0	0	50 uA
E19	Widlar Current Source	PNP similar to E9	2			0	0	50 uA
E20	Widlar Current Source	E19 with Base Current Shunt	3			0	0	100 uA	1
E21	Widlar Current Source	PNP Equivalent of E12	3			0	0	50 uA
E22	Wilson Current Source	PNP Improvement on E13	3			0	0	100 uA
E23	Wilson Current Source	Higher current	4			0	0	100 uA
E25	Current Sink	Simple NPN	3			24	18000
E26	Current Source	Simple PNP	3			48	36000
E27	Current Sink	Single Vbe NPN	2			2	1500	50 uA
E28	Current Sink	Single Vbe NPN using resistor	2			24	18000
E29	Current Source	PNP with Epi Pinch Resistor	3			8	6000			1
E30	Current Sink	Low temperature coefficient	5			16	12000			1
E31	Current Sink	Low temperature coefficient	3			28	21000
E32	Current Source	Low temperature coefficient	4			20	15000			1
E33	Current Source	#REF!	4			8	6000			1
E34	Current Source	Same as E31 with Epi Pinch	4			8	6000			1
E35	Current Source/ Sink	Self Biasing	4			24	18000
E36	Current Source/ Sink	gm Compensation	10			20	15000			1
E37	Current Sink	Better linearity	2			78	58500
E38	Current Sink	Good Power Supply Rejection	10			209	156750			1
E39	Current Sink	Better Power Supply Rejection	7			49	36750
E40	Current Sink	Higher Current, Small Tempco	3			59	44250
E41	Current Sink	Lower Current with small resistors	3			52	39000
E42	Current Sink	Lower Current, small Operating current	4			17	12750			1
E43	Comparator	Simple NPN	4			0	0	1
E44	Comparator	Simple PNP	5			20	15000	1
E45	Comparator	Compound Input	7			0	0	2
E46	Comparator	With Overcurrent Protection	6			10	7500	1
E47	Comparator	Cross Connected (Faster) Version	5			0	0	1
E48	Comparator	Current Comparator	3			0	0	1
E49	Differential Stage	Simple	2			40	30000	100 uA
E50	Differential Stage	Simpler, unbalanced	2			20	15000	100 uA
E51	Differential Stage	Improved linearity	2			42	31500	1 @ ? uA
E52	Differential Stage	Additional emitter resistance.	2			42	31500	2 @100 uA
E53	Differential Stage	Darlington Inputs	4			40	30000	2 @10 uA, 1 @100 uA
E54	Differential Stage	Tied to + Supply	4			40	30000	2 @10 uA, 1 @100 uA
E55	Differential Stage	PNP Version of E54	6			0	0	2 @5 uA, 1 @50 uA
E56	Differential Stage	Mixed Darlington	4			40	30000	2 @10 uA, 1 @100 uA
E57	Differential Stage	Self Biasing	5			80	60000	100 uA
E58	Input Current Compensation	Simple	5			20	15000	100 uA
E59	Input Current Compensation	More Complex	7			0	0	2 @100 uA
E60	Level Shifting	Simple	2			10	7500	50 uA
E61	Level Shifting	More Complex	6			6	4500	100 uA
E62	Operational Amplifiers	Simple	9			69	51750				1
E63	Output Stage	Totem Pole	4			0	0	100 uA
E64	Output Stage	Switching	2			0	0	100 uA
E65	Output Stage	No dead band	4			0	0	60 uA
E66	Output Stage	No dead band/ emitter follower	4			0	0	3 @80 uA
E67	Output Stage	Higher Drive Current	3			0	0	150 uA
E68	Output Stage	Lower Operating Current, Higher Drive	3			0	0	150 uA
E69	Startup	Startup	6			6	4500			1
E70	Startup	with epi-pinch	6			10	7500			1
E71	Voltage Reference	Simple	1			40	30000
E72	Voltage Reference	Supply Independent	1			0	0	100 uA
E73	Voltage Reference	Non-integer	2			0	0	100 uA
E74	Voltage Reference	Improved E74 (see E88)	1			15	11250	150 uA
E75	Voltage Reference	Zener Version	1			30	22500
E76	Voltage Reference	Zener, Better Supply Rejection	4			10	7500			1
E77	Voltage Reference	Zener, Larger Current Capable	7			30	22500			1
E78	Voltage Reference	With epi-pinch	3			8	6000			1
E79	Voltage Reference	Simple Bandgap	8			51	38250			1
E80	Voltage Reference	Bandgap, load current capable	10			82	61500				1
E81	Voltage to Current Converter	External Precision Resistor	5			5	3750
E82	Voltage to Current Converter	External Precision Resistor to VP	6			0	0
E83	Voltage to Current Converter	Better performance	4			0	0	50 uA
E84	Voltage to Current Converter	Best Performance	8			0	0	20 uA, 100 uA
E86	Current Source	Positive temperature coefficient	3			0	0			1
E87	Current Sink	Bypassed leakage current	2			20	15000
E88	Voltage Reference	Improved E74	2			55	41250

Key:

Term	Meaning	Comments
NPNP	The NPN/PNP island structure	This can be multiple NPNs or multiple PNPs.
Schottky	Schottky Transistor Island	This can be a Schottky transistor, a Schottky diode or an NPN transistor.
LNPN	Large NPN	An array of 24 transistors that can sink up to 200 mA. These can be connected for from 1 to 24 emitters, with 1 to 12 bases and 1 to 24 collectors.
LPNP	Large PNP	The large PNP can carry up to 6 mA.
R	Resistor Count	Number of 750 Ohm Resistors.
Resistance	Internal Resistance	Amount of Internal Resistance.
RBP	Base Pinch Resistors	Base Pinch Resistors are more like current sources. Applied voltage is limited to 5V. Use these when you need a current source, but the value us not important (see the Design Manual).
REP	Epi-Pinch Resistors	These are resistors that lead to the minus voltage (substrate). These are good for startup circuits.
Jcaps	Junction Capacitors	Junction capacitors have a voltage dependancy. The breakdown voltage of these devices is 9V, so these are not usable for the full 20V range. The capacitance would range from about 7 pF to 10 pF at 3V as an example.
CU	Cross Unders	Since the Arrays only require one level of metal to customize, it is sometimes necessary to provide a path under metal. These act like small resistors, so it is a preference to use these on lower current nodes (a base connection is preferrable to an emitter connection.
Bias	Bias Supplies	These are current supplies that need to be set up with one of the example circuits. This simplifies the presentation of the circuits to avoid a confusion over what is used for bias, and what is actual circuitry.

SIMetrix is a product of Catena Software Ltd; PSPICE is available from Cadence; The 700 Series was created by Array Design, Inc.

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